IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
Performance analysis of Multiband - OFDM systems using LDPC coder in pulsed -...IDES Editor
In this paper, a combined approach where low density
parity check (LDPC) codes are used to reduce the complexity
and power consumption of pulsed orthogonal frequencydivision
multiplexing (pulsed-OFDM) ultra-wideband (UWB)
systems is described. The proposed system uses LDPC codes
to achieve higher code rates without using convolution
encoding and puncturing thereby reducing the complexity and
power consumption of pulsed-OFDM system. The LDPCpulsed-
OFDM system achieves channel capacity with different
code rates and has good performance in different channel
fading scenarios. The pulsed OFDM system is used where
pulsed signals could spread the frequency spectrum of the
OFDM signal. The performance of LDPC-pulsed-OFDM
system for wireless personal area networks (WPAN) is
analyzed for different UWB indoor propagation channels (CM3
and CM4) provided by the IEEE 802.15.3a Standard activity
committee. To establish this, a design of LDPC-pulsed-OFDM
system using the digital video broadcasting-satellite-second
generation (DVB-S2) standard and provide the simulation
results for the different code rates supported by LDPC codes
is presented.
Delay efficient broadcast scheduling for critical event monitoring in wireles...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
Delay efficient broadcast scheduling for critical event monitoring in wireles...eSAT Journals
Abstract Wireless sensor networks are expected to work for a longtime without replacing the batteries frequently. In critical event monitoring applications in wireless sensor networks only a small number of packets need to be transmitted most of the time, when a critical event occurs in the monitoring area and is detected by a sensor node, a message is needed to be broadcast to the other nodes as soon as possible. After that, the sensor nodes can warn users nearby to flee or take some response to the event. As sensor nodes for monitoring an event are expected to work for a long time without recharging their batteries, sleep scheduling method is needed during the monitoring process. But they are only significantly reducing the energy consumption and the broadcasting delay increases. The sleep scheduling scheme in this work could essentially decrease the communication latency of alarm broadcasting from any node in WSN and the energy of all of the sensor nodes in the network is fully utilized, which in turn increases the network lifetime.
Performance analysis of Multiband - OFDM systems using LDPC coder in pulsed -...IDES Editor
In this paper, a combined approach where low density
parity check (LDPC) codes are used to reduce the complexity
and power consumption of pulsed orthogonal frequencydivision
multiplexing (pulsed-OFDM) ultra-wideband (UWB)
systems is described. The proposed system uses LDPC codes
to achieve higher code rates without using convolution
encoding and puncturing thereby reducing the complexity and
power consumption of pulsed-OFDM system. The LDPCpulsed-
OFDM system achieves channel capacity with different
code rates and has good performance in different channel
fading scenarios. The pulsed OFDM system is used where
pulsed signals could spread the frequency spectrum of the
OFDM signal. The performance of LDPC-pulsed-OFDM
system for wireless personal area networks (WPAN) is
analyzed for different UWB indoor propagation channels (CM3
and CM4) provided by the IEEE 802.15.3a Standard activity
committee. To establish this, a design of LDPC-pulsed-OFDM
system using the digital video broadcasting-satellite-second
generation (DVB-S2) standard and provide the simulation
results for the different code rates supported by LDPC codes
is presented.
Delay efficient broadcast scheduling for critical event monitoring in wireles...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
Delay efficient broadcast scheduling for critical event monitoring in wireles...eSAT Journals
Abstract Wireless sensor networks are expected to work for a longtime without replacing the batteries frequently. In critical event monitoring applications in wireless sensor networks only a small number of packets need to be transmitted most of the time, when a critical event occurs in the monitoring area and is detected by a sensor node, a message is needed to be broadcast to the other nodes as soon as possible. After that, the sensor nodes can warn users nearby to flee or take some response to the event. As sensor nodes for monitoring an event are expected to work for a long time without recharging their batteries, sleep scheduling method is needed during the monitoring process. But they are only significantly reducing the energy consumption and the broadcasting delay increases. The sleep scheduling scheme in this work could essentially decrease the communication latency of alarm broadcasting from any node in WSN and the energy of all of the sensor nodes in the network is fully utilized, which in turn increases the network lifetime.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
Software Defined Radio Engineering course samplerJim Jenkins
This 3-day course is designed for digital signal processing engineers, RF system engineers, and managers who wish to enhance their understanding of this rapidly emerging technology. Most topics include carefully described design analysis, alternative approaches, performance analysis, and references to published research results. Many topics are illustrated by Matlab simulation demos. An extensive bibliography is included.
Bibliography, Background and Overview of UWB radar sensorIJERA Editor
Due to the lack of studies in the literature that address the issue of UWB radar sensors, and also because of the
great importance of this technology, which is gaining heavily in new application areas, such as the process
industry and automotive engineering. A brief summary of the biography of UWB radar sensors have been treated
and presented in this article, specifying the difference between pulsed radar sensors regarding CW radar sensor,
and two subcategories SFCW FMCW, and highlight the benefits of each.
Black Hat '15: Spread Spectrum Satcom Hacking: Attacking The GlobalStar Simpl...Synack
Black Hat 2015
Recently, there have been several highly publicized talks about satellite hacking. However, most only touch on the theoretical rather than demonstrate actual vulnerabilities and real world attack scenarios. This talk will demystify some of the technologies behind satellite communications and do what no one has done before - take the audience step-by-step from reverse engineering to exploitation of the GlobalStar simplex satcom protocol and demonstrate a full blown signals intelligence collection and spoofing capability. I will also demonstrate how an attacker might simulate critical conditions in satellite connected SCADA systems.
In recent years, Globalstar has gained popularity with the introduction of its consumer focused SPOT asset-tracking solutions. During the session, I'll deconstruct the transmitters used in these (and commercial) solutions and reveal design and implementation flaws that result in the ability to intercept, spoof, falsify, and intelligently jam communications. Due to design tradeoffs these vulnerabilities are realistically unpatchable and put millions of devices, critical infrastructure, emergency services, and high value assets at risk.
Communication by Whispers Paradigm for Short Range Communication in Cognitive...IDES Editor
With ever increasing demand for efficiency
and increased throughput over the wireless domain, we
have now reached a point where in a method for efficient
utilization of the electromagnetic spectrum is in demand.
Cognitive radio provides us with a way in which this demand
could be catered, it does so by using devices which
autonomously adjust their communication parameters to
adapt to the external environment. However, the most
critical of this entire technology is the parameter relating to
the Spectrum Sensing aspects. In order for cognitive radio
devices to properly configure and identify the presence of
a primary carrier in a communication mode, spectrum
sensors and efficient sensing algorithms are required. There
have been many algo- rithms developed in this field.
However, these available spectrum sensing algorithms are
prohibitively expensive to implement in wireless devices that
cater to only short distance communication. In this paper,
we propose a parsimonious spectrum sensing algorithm
which would deal with sensing and couple them with short
distance wireless devices over WiFi networks operating in the
2.4 GHz band. The efficiency parameters are also shown
using demonstrations.
Orthogonal Frequency Division Multiplexing, OFDM uses a large number of narrow sub-carriers for multi-carrier transmission to overcome the effect of multi path fading problem. LTE uses OFDM for the downlink, from base station to terminal to transmit the data over many narrow band careers of 180 KHz each instead of spreading one signal over the complete 5MHz career bandwidth. OFDM meets the LTE requirement for spectrum flexibility and enables cost-efficient solutions for very wide carriers with high peak rates.
The primary advantage of OFDM over single-carrier schemes is its ability to cope with severe channel conditions. Channel equalization is simplified. The low symbol rate makes the use of a guard interval between symbols affordable, making it possible to eliminate inter symbol interference (ISI).
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
Software Defined Radio Engineering course samplerJim Jenkins
This 3-day course is designed for digital signal processing engineers, RF system engineers, and managers who wish to enhance their understanding of this rapidly emerging technology. Most topics include carefully described design analysis, alternative approaches, performance analysis, and references to published research results. Many topics are illustrated by Matlab simulation demos. An extensive bibliography is included.
Bibliography, Background and Overview of UWB radar sensorIJERA Editor
Due to the lack of studies in the literature that address the issue of UWB radar sensors, and also because of the
great importance of this technology, which is gaining heavily in new application areas, such as the process
industry and automotive engineering. A brief summary of the biography of UWB radar sensors have been treated
and presented in this article, specifying the difference between pulsed radar sensors regarding CW radar sensor,
and two subcategories SFCW FMCW, and highlight the benefits of each.
Black Hat '15: Spread Spectrum Satcom Hacking: Attacking The GlobalStar Simpl...Synack
Black Hat 2015
Recently, there have been several highly publicized talks about satellite hacking. However, most only touch on the theoretical rather than demonstrate actual vulnerabilities and real world attack scenarios. This talk will demystify some of the technologies behind satellite communications and do what no one has done before - take the audience step-by-step from reverse engineering to exploitation of the GlobalStar simplex satcom protocol and demonstrate a full blown signals intelligence collection and spoofing capability. I will also demonstrate how an attacker might simulate critical conditions in satellite connected SCADA systems.
In recent years, Globalstar has gained popularity with the introduction of its consumer focused SPOT asset-tracking solutions. During the session, I'll deconstruct the transmitters used in these (and commercial) solutions and reveal design and implementation flaws that result in the ability to intercept, spoof, falsify, and intelligently jam communications. Due to design tradeoffs these vulnerabilities are realistically unpatchable and put millions of devices, critical infrastructure, emergency services, and high value assets at risk.
Communication by Whispers Paradigm for Short Range Communication in Cognitive...IDES Editor
With ever increasing demand for efficiency
and increased throughput over the wireless domain, we
have now reached a point where in a method for efficient
utilization of the electromagnetic spectrum is in demand.
Cognitive radio provides us with a way in which this demand
could be catered, it does so by using devices which
autonomously adjust their communication parameters to
adapt to the external environment. However, the most
critical of this entire technology is the parameter relating to
the Spectrum Sensing aspects. In order for cognitive radio
devices to properly configure and identify the presence of
a primary carrier in a communication mode, spectrum
sensors and efficient sensing algorithms are required. There
have been many algo- rithms developed in this field.
However, these available spectrum sensing algorithms are
prohibitively expensive to implement in wireless devices that
cater to only short distance communication. In this paper,
we propose a parsimonious spectrum sensing algorithm
which would deal with sensing and couple them with short
distance wireless devices over WiFi networks operating in the
2.4 GHz band. The efficiency parameters are also shown
using demonstrations.
Orthogonal Frequency Division Multiplexing, OFDM uses a large number of narrow sub-carriers for multi-carrier transmission to overcome the effect of multi path fading problem. LTE uses OFDM for the downlink, from base station to terminal to transmit the data over many narrow band careers of 180 KHz each instead of spreading one signal over the complete 5MHz career bandwidth. OFDM meets the LTE requirement for spectrum flexibility and enables cost-efficient solutions for very wide carriers with high peak rates.
The primary advantage of OFDM over single-carrier schemes is its ability to cope with severe channel conditions. Channel equalization is simplified. The low symbol rate makes the use of a guard interval between symbols affordable, making it possible to eliminate inter symbol interference (ISI).
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
Design of Adjustable Reconfigurable Wireless Single Core CORDIC based Rake Re...IOSR Journals
In wireless communication system transmitted signals are subjected to multiple reflections,
diffractions and attenuation caused by obstacles such as buildings and hills, etc. At the receiver end, multiple
copies of the transmitted signal are received that arrive at clearly distinguishable time instants and are faded by
signal cancellation. Rake receiver is a technique to combine these so called multi-paths [2] by utilizing multiple
correlation receivers allocated to those delay positions on which the significant energy arrives which achieves a
significant improvement in the SNR of the output signal. This paper shows how the rake, including dispreading
and descrambling could be replaced by a receiver that can be implemented on a CORDIC based hardware
architecture. The performance in conjunction with the computational requirements of the receiver is widely
adjustable which is significantly better than that of the conventional rake receiver
Design of Adjustable Reconfigurable Wireless Single Core CORDIC based Rake Re...IOSR Journals
Abstract : In wireless communication system transmitted signals are subjected to multiple reflections, diffractions and attenuation caused by obstacles such as buildings and hills, etc. At the receiver end, multiple copies of the transmitted signal are received that arrive at clearly distinguishable time instants and are faded by signal cancellation. Rake receiver is a technique to combine these so called multi-paths [2] by utilizing multiple correlation receivers allocated to those delay positions on which the significant energy arrives which achieves a significant improvement in the SNR of the output signal. This paper shows how the rake, including dispreading and descrambling could be replaced by a receiver that can be implemented on a CORDIC based hardware architecture. The performance in conjunction with the computational requirements of the receiver is widely adjustable which is significantly better than that of the conventional rake receiver. Keywords - Rake receiver, Multi-paths, CORDIC
Standard radar detection process requires that the sensor output is compared to a predetermined threshold. The
threshold is selected based on a-priori knowledge available and/or certain assumptions. However, any
knowledge and/or assumptions become in adequate due to the presence of multiple targets with varying signal
return and usually non stationary background. Thus, any predetermined threshold may result in either increased
false alarm rate or increased track loss. Even approaches where the threshold is adaptively varied will not
perform well in situations when the signal return from the target of interest is too low compared to the average
level of the background .Track-before-detect techniques eliminate the need for a detection threshold and provide
detecting and tracking targets with lower signal-to-noise ratios than standard methods. However, although trackbefore-
detect techniques eliminate
the need for detection threshold at sensor's signal processing stage, they often use tuning thresholds at the output
of the filtering stage .This paper presents a computerized simulation model for target detection process.
Moreover, the proposed model method is based on the target motion models, the output of the detection
process can easily be employed for maneuvering target tracking.
Implementation of Adaptive Digital Beamforming using CordicEditor IJCATR
Sonar imaging is one of the simplest technique for detection of under water drowned bodies. There is a need for design of
conventional beamforming which are robust and simple. Adaptive beamformer is used to improve the quality of the sonar image. As a
result we get an image containing more useful and correct information. The CORDIC computing technique a highly efficient method
to compute elementary functions like sine, cosine, translate, rotate values using CORDIC algorithm. The system simulation was
carried out using ModelSim and Xilinx ISE Design Suite 9.2i.. Matlab code is used to implement sin and cos using cordic angles and
amplitude response of beamformed data by optimized method in order to enlarge the validity region of beamforming. Synthesis
results of cordic shows the reduced memory requirement and less power consumption.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
PERFORMANCE ANALYSIS OF QOS PARAMETERS LIKE PSNR, MAE & RMSE USED IN IMAGE TR...Journal For Research
Wireless designers constantly seek to improve the spectrum efficiency/capacity, coverage of wireless networks and link reliability. In this direction, Space-time wireless technology that uses multiple antennas along with appropriate signaling and receiver techniques that offers a powerful tool for improving the wireless performance is used in this thesis work. A special version of STBC called ‘Alamouti code’ is used. PSK modulation scheme is used for modulation of data. In this thesis work, the Space-Time Block Codes (STBC) is used in WLAN wireless network that uses multiple numbers of antennas at both transmitter and receiver. The STBC which includes the Alamouti Scheme for 2 transmit antenna and a different number of receiving antenna has been studied, simulated and analyzed. The simulation has been done in MATLAB. Throughput and several parameter performance has been analyzed using the MATLAB.A sample image is transmitted to compare the performance of various parameters like RMSE, PSNR, MAE etc. All the parameters are plotted against SNR (in dB) values ranging from -18 to 30. Various observations being made for the improvement in various parameters with increasing SNR and/or with changing diversity scheme. AWGN channel is used here for communication of sampled image data.
A SYSTEM CONCEPT FOR A 3D REAL-TIMEOFDM MIMO RADAR FOR FLYING PLATFORMSNexgen Technology
TO GET THIS PROJECT COMPLETE SOURCE ON SUPPORT WITH EXECUTION PLEASE CALL BELOW CONTACT DETAILS
MOBILE: 9791938249, 0413-2211159, WEB: WWW.NEXGENPROJECT.COM,WWW.FINALYEAR-IEEEPROJECTS.COM, EMAIL:Praveen@nexgenproject.com
NEXGEN TECHNOLOGY provides total software solutions to its customers. Apsys works closely with the customers to identify their business processes for computerization and help them implement state-of-the-art solutions. By identifying and enhancing their processes through information technology solutions. NEXGEN TECHNOLOGY help it customers optimally use their resources.
Clutter reduction technique based on clutter model for automatic target class...TELKOMNIKA JOURNAL
Classification becomes one of the important elements in the forward scatter radar (FSR) micro-sensors network. This classification performance is dependent on the target’s profile behaviour and the network’s surrounding; and one of the factors that cause the reduction of classification probability is the presence of ground clutter. As the volume of clutter increases, their masking effect becomes greater and may result in more significant errors in target classification. Hence, to reduce misclassification in the FSR sensor network, a new clutter reduction technique based on the ground clutter model is proposed. Simulated ground clutter is modeled based on the estimated signal to clutter ratio (SCR) of the received signal. The clutter effect is diminished by eliminating simulated like-clutter from the receiving signals. The result shows improvement in the classification accuracy, especially for the minimum value of the SCR and this new technique uses only one database which will shorten the processing time and reduce the overall database’s size.
Removing Uninteresting Bytes in Software FuzzingAftab Hussain
Imagine a world where software fuzzing, the process of mutating bytes in test seeds to uncover hidden and erroneous program behaviors, becomes faster and more effective. A lot depends on the initial seeds, which can significantly dictate the trajectory of a fuzzing campaign, particularly in terms of how long it takes to uncover interesting behaviour in your code. We introduce DIAR, a technique designed to speedup fuzzing campaigns by pinpointing and eliminating those uninteresting bytes in the seeds. Picture this: instead of wasting valuable resources on meaningless mutations in large, bloated seeds, DIAR removes the unnecessary bytes, streamlining the entire process.
In this work, we equipped AFL, a popular fuzzer, with DIAR and examined two critical Linux libraries -- Libxml's xmllint, a tool for parsing xml documents, and Binutil's readelf, an essential debugging and security analysis command-line tool used to display detailed information about ELF (Executable and Linkable Format). Our preliminary results show that AFL+DIAR does not only discover new paths more quickly but also achieves higher coverage overall. This work thus showcases how starting with lean and optimized seeds can lead to faster, more comprehensive fuzzing campaigns -- and DIAR helps you find such seeds.
- These are slides of the talk given at IEEE International Conference on Software Testing Verification and Validation Workshop, ICSTW 2022.
Dr. Sean Tan, Head of Data Science, Changi Airport Group
Discover how Changi Airport Group (CAG) leverages graph technologies and generative AI to revolutionize their search capabilities. This session delves into the unique search needs of CAG’s diverse passengers and customers, showcasing how graph data structures enhance the accuracy and relevance of AI-generated search results, mitigating the risk of “hallucinations” and improving the overall customer journey.
Communications Mining Series - Zero to Hero - Session 1DianaGray10
This session provides introduction to UiPath Communication Mining, importance and platform overview. You will acquire a good understand of the phases in Communication Mining as we go over the platform with you. Topics covered:
• Communication Mining Overview
• Why is it important?
• How can it help today’s business and the benefits
• Phases in Communication Mining
• Demo on Platform overview
• Q/A
Unlocking Productivity: Leveraging the Potential of Copilot in Microsoft 365, a presentation by Christoforos Vlachos, Senior Solutions Manager – Modern Workplace, Uni Systems
Maruthi Prithivirajan, Head of ASEAN & IN Solution Architecture, Neo4j
Get an inside look at the latest Neo4j innovations that enable relationship-driven intelligence at scale. Learn more about the newest cloud integrations and product enhancements that make Neo4j an essential choice for developers building apps with interconnected data and generative AI.
Why You Should Replace Windows 11 with Nitrux Linux 3.5.0 for enhanced perfor...SOFTTECHHUB
The choice of an operating system plays a pivotal role in shaping our computing experience. For decades, Microsoft's Windows has dominated the market, offering a familiar and widely adopted platform for personal and professional use. However, as technological advancements continue to push the boundaries of innovation, alternative operating systems have emerged, challenging the status quo and offering users a fresh perspective on computing.
One such alternative that has garnered significant attention and acclaim is Nitrux Linux 3.5.0, a sleek, powerful, and user-friendly Linux distribution that promises to redefine the way we interact with our devices. With its focus on performance, security, and customization, Nitrux Linux presents a compelling case for those seeking to break free from the constraints of proprietary software and embrace the freedom and flexibility of open-source computing.
Enchancing adoption of Open Source Libraries. A case study on Albumentations.AIVladimir Iglovikov, Ph.D.
Presented by Vladimir Iglovikov:
- https://www.linkedin.com/in/iglovikov/
- https://x.com/viglovikov
- https://www.instagram.com/ternaus/
This presentation delves into the journey of Albumentations.ai, a highly successful open-source library for data augmentation.
Created out of a necessity for superior performance in Kaggle competitions, Albumentations has grown to become a widely used tool among data scientists and machine learning practitioners.
This case study covers various aspects, including:
People: The contributors and community that have supported Albumentations.
Metrics: The success indicators such as downloads, daily active users, GitHub stars, and financial contributions.
Challenges: The hurdles in monetizing open-source projects and measuring user engagement.
Development Practices: Best practices for creating, maintaining, and scaling open-source libraries, including code hygiene, CI/CD, and fast iteration.
Community Building: Strategies for making adoption easy, iterating quickly, and fostering a vibrant, engaged community.
Marketing: Both online and offline marketing tactics, focusing on real, impactful interactions and collaborations.
Mental Health: Maintaining balance and not feeling pressured by user demands.
Key insights include the importance of automation, making the adoption process seamless, and leveraging offline interactions for marketing. The presentation also emphasizes the need for continuous small improvements and building a friendly, inclusive community that contributes to the project's growth.
Vladimir Iglovikov brings his extensive experience as a Kaggle Grandmaster, ex-Staff ML Engineer at Lyft, sharing valuable lessons and practical advice for anyone looking to enhance the adoption of their open-source projects.
Explore more about Albumentations and join the community at:
GitHub: https://github.com/albumentations-team/albumentations
Website: https://albumentations.ai/
LinkedIn: https://www.linkedin.com/company/100504475
Twitter: https://x.com/albumentations
GridMate - End to end testing is a critical piece to ensure quality and avoid...ThomasParaiso2
End to end testing is a critical piece to ensure quality and avoid regressions. In this session, we share our journey building an E2E testing pipeline for GridMate components (LWC and Aura) using Cypress, JSForce, FakerJS…
A tale of scale & speed: How the US Navy is enabling software delivery from l...sonjaschweigert1
Rapid and secure feature delivery is a goal across every application team and every branch of the DoD. The Navy’s DevSecOps platform, Party Barge, has achieved:
- Reduction in onboarding time from 5 weeks to 1 day
- Improved developer experience and productivity through actionable findings and reduction of false positives
- Maintenance of superior security standards and inherent policy enforcement with Authorization to Operate (ATO)
Development teams can ship efficiently and ensure applications are cyber ready for Navy Authorizing Officials (AOs). In this webinar, Sigma Defense and Anchore will give attendees a look behind the scenes and demo secure pipeline automation and security artifacts that speed up application ATO and time to production.
We will cover:
- How to remove silos in DevSecOps
- How to build efficient development pipeline roles and component templates
- How to deliver security artifacts that matter for ATO’s (SBOMs, vulnerability reports, and policy evidence)
- How to streamline operations with automated policy checks on container images
Building RAG with self-deployed Milvus vector database and Snowpark Container...Zilliz
This talk will give hands-on advice on building RAG applications with an open-source Milvus database deployed as a docker container. We will also introduce the integration of Milvus with Snowpark Container Services.
Encryption in Microsoft 365 - ExpertsLive Netherlands 2024Albert Hoitingh
In this session I delve into the encryption technology used in Microsoft 365 and Microsoft Purview. Including the concepts of Customer Key and Double Key Encryption.
In the rapidly evolving landscape of technologies, XML continues to play a vital role in structuring, storing, and transporting data across diverse systems. The recent advancements in artificial intelligence (AI) present new methodologies for enhancing XML development workflows, introducing efficiency, automation, and intelligent capabilities. This presentation will outline the scope and perspective of utilizing AI in XML development. The potential benefits and the possible pitfalls will be highlighted, providing a balanced view of the subject.
We will explore the capabilities of AI in understanding XML markup languages and autonomously creating structured XML content. Additionally, we will examine the capacity of AI to enrich plain text with appropriate XML markup. Practical examples and methodological guidelines will be provided to elucidate how AI can be effectively prompted to interpret and generate accurate XML markup.
Further emphasis will be placed on the role of AI in developing XSLT, or schemas such as XSD and Schematron. We will address the techniques and strategies adopted to create prompts for generating code, explaining code, or refactoring the code, and the results achieved.
The discussion will extend to how AI can be used to transform XML content. In particular, the focus will be on the use of AI XPath extension functions in XSLT, Schematron, Schematron Quick Fixes, or for XML content refactoring.
The presentation aims to deliver a comprehensive overview of AI usage in XML development, providing attendees with the necessary knowledge to make informed decisions. Whether you’re at the early stages of adopting AI or considering integrating it in advanced XML development, this presentation will cover all levels of expertise.
By highlighting the potential advantages and challenges of integrating AI with XML development tools and languages, the presentation seeks to inspire thoughtful conversation around the future of XML development. We’ll not only delve into the technical aspects of AI-powered XML development but also discuss practical implications and possible future directions.
UiPath Test Automation using UiPath Test Suite series, part 6DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 6. In this session, we will cover Test Automation with generative AI and Open AI.
UiPath Test Automation with generative AI and Open AI webinar offers an in-depth exploration of leveraging cutting-edge technologies for test automation within the UiPath platform. Attendees will delve into the integration of generative AI, a test automation solution, with Open AI advanced natural language processing capabilities.
Throughout the session, participants will discover how this synergy empowers testers to automate repetitive tasks, enhance testing accuracy, and expedite the software testing life cycle. Topics covered include the seamless integration process, practical use cases, and the benefits of harnessing AI-driven automation for UiPath testing initiatives. By attending this webinar, testers, and automation professionals can gain valuable insights into harnessing the power of AI to optimize their test automation workflows within the UiPath ecosystem, ultimately driving efficiency and quality in software development processes.
What will you get from this session?
1. Insights into integrating generative AI.
2. Understanding how this integration enhances test automation within the UiPath platform
3. Practical demonstrations
4. Exploration of real-world use cases illustrating the benefits of AI-driven test automation for UiPath
Topics covered:
What is generative AI
Test Automation with generative AI and Open AI.
UiPath integration with generative AI
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
DevOps and Testing slides at DASA ConnectKari Kakkonen
My and Rik Marselis slides at 30.5.2024 DASA Connect conference. We discuss about what is testing, then what is agile testing and finally what is Testing in DevOps. Finally we had lovely workshop with the participants trying to find out different ways to think about quality and testing in different parts of the DevOps infinity loop.
1. Rohit N Singh, M.Chennakesavulu / International Journal of Engineering Research and
Applications (IJERA) ISSN: 2248-9622 www.ijera.com
Vol. 2, Issue4, July-August 2012, pp.2256-2263
Remote Radar Data Acquisition And Control Using Cdma Rf
Link
Rohit N Singh*, M.Chennakesavulu**
*(Student, Department of E.C.E, RGMCET, Nandyal)
** (Asst. Professor, Department of E.C.E, RGMCET, Nandyal)
ABSTRACT
RADAR SEEKER is used in missile of major concern. A spread spectrum technique
system for detection and tracking a target. It will spreads the bandwidth of the data uniformly for the
be integrated in the nose cone of the missile. same transmitted power[1]. A spreading code is a
During testing and launching of the missile all pseudo-random code. These are studied and
necessary important parameters and status of the performance expressions are derived and confirmed
seeker are collected for analysis to ascertain the by computational simulation using MALAB
health of the Seeker. Similarly the configuration SIMULINK. The spread spectrum technique which
and control of the seeker is to ensure the proper is present in SPZB260 Zigbee module, is used in
mode of operation of seeker. order to establish RF communication and it is
controlled by ARM Cortex M3
During launch campaign the technicians and
Processor(LPC1768).
engineers cannot go near the missile and the
seeker Health, but the knowledge of seeker
Section2 provides a brief description of Spread
health is very much necessary for the launch
Spectrum Modulation scheme using QPSK,
campaign, so a remote Control and data
SPZB260 and ARM Cortex M3. Section 3 gives
acquisition system should be there to confirm the
block diagram of Transmitter and Receiver. The
health of the seeker either through wired serial
procedure to implement transmitter and receiver
communication link or using RF Link.
using Simulink are explained in this section. Section
The Aim of this project is to Design and 4 provides simulation results of transmitter-receiver,
Develop a ”Remote Radar Data Acquisition and
which are supporting the theory provided in the
Control using CDMA RF Link ” and to Test
earlier sections in Simulink. Finally the work is
with an existing radar seeker.
concluded in section 5 and the scope for future work
is explained.
Keywords – RADAR SEEKER, QPSK, CORTEX
–M3 (ARM Processor), SPZB260 (ZIGBEE
Module),Costas loop.
II. GENERAL STRUCTURE OF THE
SYSTEM
I. INTRODUCTION
A. Definition of Spread Spectrum
. Radar (RAdio Detection And Ranging) is
Spread spectrum is a means of
an object-detection system which uses radio waves
transmission in which the data sequence occupies a
to determine the range, altitude, direction, or speed
bandwidth in excess of the minimum bandwidth
of objects. It can be used to detect aircraft, ships,
necessary to send it. The spectrum spreading is
spacecraft, guided missiles, motor vehicles, weather
accomplished before transmission through the use of
formations, and terrain. The seeker is a homing
a code that is independent of data sequence. The
system perceives the target with its own radar ,
same code is used in the receiver to despread the
extracts tracking data from the received signal, and
received signal so that the original data sequence
computes its own steering commands. As it closes
may be recovered[1][2].
on the target, a fixed angular error at the missile
results in a decreasing linear error, providing the
B. Working of DSSS
higher accuracy characteristic of homing guidance.
A conceptual diagram of DSSS system is
An active radar seeker is basically a tracking
given in fig 1. At the transmitter the digital binary
Radar whose antenna is mounted on a stabilized
information or data d(t) having a source bit of rate
platform so as to provide necessary isolation of the
antenna from the body motion of the missile. of Where( is bit rate and is the bit
Enabling the antenna to keep tracking the target and duration) is XORed with spreading signal c(t) is a
pseudonoise (PN) signal having chip rate of
generating signals which are used in terminal
guidance of the missile. ( is chip rate and is the pulse
CDMA (Code Division Multiple Access) is a duration)[2]. Where
spread spectrum multiple access technique. Spread
spectrum modulation was originally developed for The data stream entering the modulator is converted
military applications, where resistance to jamming is by a serial to parallel converter into two separate
data streams.
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2. Rohit N Singh, M.Chennakesavulu / International Journal of Engineering Research and
Applications (IJERA) ISSN: 2248-9622 www.ijera.com
Vol. 2, Issue4, July-August 2012, pp.2256-2263
One stream, I(t) is in the phase and other Q(t), is
quadrature phase ,. After obtaining the inphase and
Quadrature signals ,we need to do modulation for
the transmission of the signal. The inphase signal is
multiplied by a carrier cosine wave and Quadrature
signal is multiplied by sin signal. The both I(t) and
Q(t) signal are summed to produce the transmitting
signal with four phase signal.
In the Receiver the received signal or the
modulated signal is first demodulated and then
despread. So, for demodulation we use Costas loop.
Costas loop is used to track the carrier signal and
phase of modulated signal. It produces two output
one is Inphase and the other quadrature phase. This
two signal are passed through the parallel to serial
convertor to obtain spreading signal. By using
matched filter as despread we can obtain required
binary data.
Figure 2: Wave form of Pseudo Random
generator
Autocorrelation:
Figure 1: Block diagram of Spread Spectrum The auto correlation function for the
Communication system periodic wave is defined as number of agreements
less number of disagreements in a term by term
C. Pseudo Noise Sequence comparison over one full period of sequence with
The types of spreading sequences are Gold cyclic shift (position τ) of the sequence itself:
sequences, maximum-length sequences, kasami
sequences or walsh sequences. pseudo noise code
generators are periodic in that the sequence that is
produced repeats itself after some period of time.
Such a periodic sequence is portrayed in fig 2. The
Best known , best described PN sequences are
maximal length. The generator contains type D flip-
flops and is connected so that each data input except
D0 is the input of the preceding flip-flop. Not all Q
flip flop outputs need be connected to parity
generator . the number of flip flop L and selection of
which flip flop outputs are connected to parity
generator determines the length and characteristics
of the generated PN sequences. When the code is
generated by maximum-length sequence , the value
is , where n is the number of stages in the Figure 3: Block diagram of Pseudo Random
code generator[2]. generator
D. Direct Sequence QPSK
In QPSK, the data stream Inphase and
Quadrature phase , with each stream having a
symbol rate equal to half that of the incoming bit .
Both I and Q are separately applied to multipliers.
The Inphase multiplier is the carrier signal sinwt
and Quadrature multiplier is the carrier signal
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3. Rohit N Singh, M.Chennakesavulu / International Journal of Engineering Research and
Applications (IJERA) ISSN: 2248-9622 www.ijera.com
Vol. 2, Issue4, July-August 2012, pp.2256-2263
coswt. The I multiplier output signal has phase 90 The first pair is connected to seeker via serial
and 270 degrees and Q multiplier output signal has communication (UART) via LPC1768 which acts as
phase 0 and 180 degrees. Figure 4 shows a typical client and other pair is connected to the system .
QPSK waveform in the time domain[4]. were command and data sent and receive using GUI
via serial communication(UART). Which is also
called basestation. The following fig 6 show the the
CDMA communication between the seeker and
user.
Figure 4: Wave form In phase and quadrature of
QPSK modulation
Figure 6: Block diagram of CDMA TransRecevier
E. Costas Loop system
Costas loop is use for carrier recovery and
phase detection which is used as demodulation i) SPZB260
circuit. The SPZB260 integrates a 2.4 GHz,
In Costas Loop the incoming signal is mixed with IEEE802.15.4- compliant transceiver. SPZB260
the output of the VCO, both before its phase is exposes access to the EmberZnet API across a
shifted and after its phase is shifted by 90 degrees. standard SPI module allowing application to
These two outputs are then filtered, multiplied develop on a host platform.
together, filtered again and to control the frequency Some features of SPZB260 Zigbee Transceiver are
of the voltage controlled oscillator. The decoded as follows[6]:
spreading data stream can be taken from the output ■ Integrated 2.4 GHz, IEEE 802,15,4-compliant
of the mixer output[1]. transceiver:
– 3 dBm nominal TX output power
– -95 dBm RX sensitivity
– + 5 dBm in boost mode
– RX filtering for co-existence with IEEE
802.11g and Bluetooth devices
– Integrated VCO and loop filter
■ Integrated IEEE 802.15.4 PHY and MAC
■ Controlled by a standard serial line for an easy
interface of host microcontrollers (SPI)
■ Embedded flash and integrated RAM for
program and data storage
■ On board 24 MHz stable crystal
Figure 5: Block diagram of Costas Loop Carrier ■ Integrated RC oscillator (typ. 10 kHz) for low
and phase recovery power operation
■ 1 μA power consumption in deep sleep mode
■ Watchdog timer and power-on reset
■ Pins available for non-intrusive debug interface
(SIF)
■ Single supply voltage 2.1 to 3.6 Vdc
When these two outputs are multiplied together, the ■ Available link and activity outputs for external
product is indication / monitor
■ CE compliant (a)
■ FCC compliant (FCC ID:S9NZB260A) (a)
F. Hardware Requirement
Here we use the Arm Cortex M3 Processor
to Control the Spread Spectrum Module (i.e
SPBZB260) via SPI mode Here, we use two
SPZB260 and two LPC1768.
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4. Rohit N Singh, M.Chennakesavulu / International Journal of Engineering Research and
Applications (IJERA) ISSN: 2248-9622 www.ijera.com
Vol. 2, Issue4, July-August 2012, pp.2256-2263
iii) Interfacing of SPZB260 with ARM
Controller
ARM Cortex M3 (LPC1768) use SPI Mode
to Interface the SPZB260.The Programming of the
LPC1768 is done by using Keil Uvision4 MDK.
The SPI transaction is as follows. The basic
SPZB260 SPI transaction is half-duplex to ensure
proper framing and to give the SPZB260 adequate
response time. The basic transaction, as shown in
Figure 9, is composed of three sections: Command,
Wait, and Response. The transaction can be
considered analogous to a function call. The
Command section is the function call, and the
Response section is the return value. The clock used
for SPI transaction is 2 MHz For every 1 byte of
data transfer or received a 8bit clock pulse is to be
generated by LPC1768 Microcontroller.
Figure 7: Block diagram of
SPZB260
ii) ARM Processor
The LPC1768 is an 32bit microcontroller
.The peripheral complement of the LPC1768
includes up to 512 kB of flash memory, up to 64 kB
of data memory, Ethernet MAC, a USB interface
that can be configured as either Host, Device, or
OTG, 8 channel general purpose DMA controller, 4 Figure 9: SPI transaction between microcontroller
UARTs, 2 CAN channels, 2 SSP controllers, SPI and SPZB260
interface, 3 I2C interfaces, 2-input plus 2-output I2S
interface, 8 channel 12-bit ADC, 10-bit DAC, motor a) Command Section
control PWM, Quadrature Encoder interface, 4 The LPC1768 microcontroller begins the
general purpose timers, 6-output general purpose transaction by asserting the Slave Select and then
PWM, ultra-low power RTC with separate battery sending a command to the SPZB260. This command
supply, and up to 70 general purpose I/O pins[5]. can be of any length from 2 to 128 bytes and must
not begin with 0xFF. During the Command section,
the SPZB260 will respond with only 0xFF. The
LPC1768 should ignore data on MISO during the
Command section. Once the LPC1768 has
completed transmission of the entire message, the
transaction moves to the Wait section.
b) Wait Section
The Wait section is a period of time during
which the SPZB260 may be processing the
command or performing other operations. Note that
this section can be any length of time up to 200
milliseconds. Because of the variable size of the
Wait section, an interrupt-driven or polling-driven
method is suggested for clocking the SPI as opposed
to a DMA method. Since the SPZB260 can require
up to 200 milliseconds to respond, as long as the
Host keeps Slave Select active, the LPC1768 can
perform other tasks while waiting for a Response.
To determine when a Response is ready, use one of
two methods: Clock the SPI until the SPZB260
transmits a byte other than 0xFF. Interrupt on the
Figure 8: Block diagram of ARM CORTEX M3 falling edge of nHOST_INT. The first method,
Controller clocking the SPI, is recommended due to simplicity
in implementing. During the Wait section, the
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5. Rohit N Singh, M.Chennakesavulu / International Journal of Engineering Research and
Applications (IJERA) ISSN: 2248-9622 www.ijera.com
Vol. 2, Issue4, July-August 2012, pp.2256-2263
SPZB260 will transmit only 0xFF and will ignore communication tool box, we can generate binary
all incoming data until the Response is ready. When data stream of 250Kbps. By adjusting the
the SPZB260 transmits a byte other than 0xFF, the parameters like M-ary number, initial seed, sample
transaction has officially moved into the Response time and output data type, we can achieve the fixed
section. binary stream. In a real time scenario, this data
stream is supplied by application that will generate
c) Response Section information to be transmitted.
When the SPZB260 transmits a byte other
than 0xFF, the transaction has officially moved into ii. Generating PN sequence: PN code is
the Response section. The data format is the same generated using D-flip-flop. we can generate 7 bit-
format used in the Command section. The response PN sequence chip rate of 0.04ms by using 3 D- flip-
can be of any length from 2 to 128 bytes and will flop and a XOR gate to generate 7 bit PN code.
not begin with 0xFF. Depending on the actual
response, the length of the response is known from iii. Serial to parallel converter implementation:
the first or second byte and this length should be By using flip-flops in Simulink extras tool box, we
used by the Host to clock out exactly the correct can get the parallel data from the serial data. The
number of bytes. Once all bytes have been clocked, necessary instruments are one clock, one JK flip
it is allowable for the LPC1768 to deassert chip flop and two D flipflops. The initial conditions of
select. Since the LPC1768 is in control of clocking the flip-flops using is zero and the period of the
the SPI, there are no ACKs or similar signals needed clock was decided by the input data stream. By this
back from the Host because the SPZB260 will way we can easily generate the parallel data
assume the LPC1768 could accept the bytes being technically called as inphase and Quadrature data.
clocked on the SPI[7]. Here necessary one bit offset delay is provided by
the D flip flop itself. multiplied to get a Direct
SOFTWARES USED spread spectrum signal.
1. Keil`uVision4 software for embedded C
programming. iv. Performing Modulation: After obtaining the
2. Flash Magic software programmer for dumping inphase and Quadrature signals we need to do
code into ARM-cortex M3 LPC 1768 modulation for the transmission of the signal.
Microcontroller Generally we do this with the help of high
3. Debugger used is CooCox CoIDE frequency(500HZ and sample time of 1/10000)
4.Visual Basic for GUI which used to send sinusoidal carrier. By using sine wave block in
command to LPC1768 via serial port. Signal Processing Tool Box, sine wave can be
generated by adjusting the parameters like
amplitude, frequency, sample time, phase and sine
III. IMPLEMENTATION OF type. Now the inphase signal after half sine pulse
TRANSRECEIVER MODEL IN shaping is multiplied by a sine wave and Quadrature
is multiplied by its cosine signal which is nothing
MATLAB/SIMULINK
but 90 degree phase shift of original sinusoidal
carrier.
A. CDMA Transmitter in Simulink
v. Output of the Transmitter: Addition of both
inphase and Quadrature signals after modulation,
generates the required transmitter output. The
required output signal is generated by using sum
block in commonly used blocks. There will be no
phase transitions in the output, which is an
advantageous property[8].
B. CDMA Receiver in Simulink
Figure 10: Implementation of CDMA Transmitter
in Simulink:
i. Generating binary data stream: By using
Random integer generator block in the
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6. Rohit N Singh, M.Chennakesavulu / International Journal of Engineering Research and
Applications (IJERA) ISSN: 2248-9622 www.ijera.com
Vol. 2, Issue4, July-August 2012, pp.2256-2263
The following figures demonstrate simulation
results for CDMA transmission system. The results
are displayed in the form of snapshots of scope
signals.
Figure 11: Implementation of CDMA Receiver in
Simulink:
i. Multiplying with RF carrier: By using Costas
loop is use for carrier recovery and phase detection
which is used as demodulation circuit. In Costas
Loop the incoming signal is mixed with the output
of the VCO, both before its phase is shifted and after Figure 12: Binary data generated by Random integer
its phase is shifted by 90 degrees. These two outputs Generator
are then filtered, multiplied together, filtered again
and to control the frequency of the voltage
controlled oscillator. The decoded spreading data
stream can be taken from the output of the mixer
output.
ii. Sampling and Thresholding :
a. Sampling: By using the zero order hold circuit in
the Simulink discrete menu, a sample and hold
circuit was generated. It samples the signal for every
T time period. By setting the sample time in this
block, adjust the time period T in zero order hold
circuit.
b. Thresholding: By using compare to constant
block in the Simulink logic and bit operations menu.
By setting operator, constant value and output data
type parameters, we can get the comparator circuit, Figure 13: PN Generator
which compares the sampled data with the
predefined threshold value and detects whether the
transmitted data is „1‟ or „0‟.
iii. Parallel to serial conversion: By using
switch block in the Simulink signal rooting menu,
convert the parallel data into serial data. By setting
the threshold value and the criterion for parallel to
serial conversion, convert parallel data into serial
data
iv. Despreading: The resulting data coming after
serial to parallel conversion is multiplied with the
delayed PN sequence. So that original is recovered
data with small amount of delay. The incoming bit
stream and the resultant output both are same but
with a small amount of delay.
IV. SIMULATION RESULTS
Figure 14: PN + Data
A. At the transmitter end
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7. Rohit N Singh, M.Chennakesavulu / International Journal of Engineering Research and
Applications (IJERA) ISSN: 2248-9622 www.ijera.com
Vol. 2, Issue4, July-August 2012, pp.2256-2263
B. At the receiver end
Figure 15: In phase modulation signal
Figure 18: Recovered In phase stream
using costas loop
Figure 19: Recovered Quad phase stream using
Figure 16: Quadrature phase modulation costas loop
signal
Figure 20: Recovered Data stream with
small delay
Figure 17: DSSS signal to transmit
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8. Rohit N Singh, M.Chennakesavulu / International Journal of Engineering Research and
Applications (IJERA) ISSN: 2248-9622 www.ijera.com
Vol. 2, Issue4, July-August 2012, pp.2256-2263
CONCLUSION
CDMA RF link is used for achieving the
communication between transmitters and receivers.
Simulation results were plotted. Hard ware
implementation is to be done using cortexM3
processor and SPZB260 Zigbee module for RF
communications. In future, we aspire to improvise
the design with many (2 to 3) client to control the
other system of the missile.
REFERENCES
1. George R Cooper ,Clare D
McGillem.”.Modern Communications and
Spread Spectrum” 1986 .
2. Dr.Kamilo Feher “Wireless Digital
Communication." . June 2003.
3. http://en.wikipedia.org/wiki/Pseudorandom
_noise.
4. http://en.wikipedia.org/wiki/PSK.
5. http://www.nxp.com/documents/data_sheet
/LPC1769_68_67_66_65_64_63.PDF
6. http://www.st.com/internet/com/TECHNIC
AL_RESOURCES/TECHNICAL_LITER
ATURE/DATASHEET/CD00171682.
7. Kanna, Ravikanath. Design of Zigbee
Transmitter Receiver IEEE 802.15.4 using
Matlab/Simulink. Masters Thesis,
Rourkela, Odhisha: National Institute of
Technology, 2011.
8. mathworks. 2012.
www.mathworks.com/help/toolbox/comm/
ref/alignsignals.html (accessed March 5,
2012)
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