Abstract: The Zigbee is a low cost communication technology used for low data rate communication system such as industrial automation etc. Because of its low complexity it is widely adopted for many applications. But the utilization of the same spectrum band by the WLAN system causes interference between both the systems. The proposed approach presents an analysis of this interference effect on Zigbee system when operated with WLAN sources at different distances and different power. It also analyzes the effect when a frequency offset is established between both systems. The simulation results shows that a small offset can provide sufficient improvement in the performance. Keywords: Smart Grids, Zigbee Network, Mesh Network, Wireless LAN (WLAN), BER
Verilog Based Design and Simulation of MAC and PHY Layers for Zigbee Digital ...IJERA Editor
The past several years have witnessed a rapid development in the wireless network area. So far wireless networking has been focused on high-speed and long range applications. Zigbee technology was developed for a Wireless Personal Area Networks (WPAN), aimed at control and military applications with low data rate and low power consumption. Zigbee is a standard defines the set of communication protocols for low-data-rate short-range wireless networking. Zigbee-based wireless devices operate in 868 MHz, 915 MHz, and 2.4 GHz frequency bands. The maximum data rate is 250K bits per second. Zigbee is mainly for battery-powered applications where low data rate, low cost, and long battery life are main requirements. This paper explores Verilog design for various blocks in Zigbee Transmitter architecture for an acknowledgement frame. The word digital has made a dramatic impact on our society. Developments of digital solutions have been possible due to good digital system design and modeling techniques. Further developments have been made and introduced VLSI in order to reduce size of the architecture, to improve speed of operation, improvements in predictability of the circuit behavior. Digital Zigbee Transmitter comprises of Cyclic Redundancy Check, Bit-to-Symbol block, Symbol-to-chip block, Modulator and Pulse shaping block. The work here is to show how we can design Zigbee transmitter with its specifications by using Verilog with less number of slices and Look up tables (LUTs).
The Internet of Things (IoT) is a description for embedded
and network cloud technologies that enable remote monitoring and control of sensors
and systems. IoT can be used in commercial, industrial, utility and residential applications.
You’ll find the IoT’s remote monitoring and control applications in hospitals, parking lots,
shipping departments, and even bathrooms.
Verilog Based Design and Simulation of MAC and PHY Layers for Zigbee Digital ...IJERA Editor
The past several years have witnessed a rapid development in the wireless network area. So far wireless networking has been focused on high-speed and long range applications. Zigbee technology was developed for a Wireless Personal Area Networks (WPAN), aimed at control and military applications with low data rate and low power consumption. Zigbee is a standard defines the set of communication protocols for low-data-rate short-range wireless networking. Zigbee-based wireless devices operate in 868 MHz, 915 MHz, and 2.4 GHz frequency bands. The maximum data rate is 250K bits per second. Zigbee is mainly for battery-powered applications where low data rate, low cost, and long battery life are main requirements. This paper explores Verilog design for various blocks in Zigbee Transmitter architecture for an acknowledgement frame. The word digital has made a dramatic impact on our society. Developments of digital solutions have been possible due to good digital system design and modeling techniques. Further developments have been made and introduced VLSI in order to reduce size of the architecture, to improve speed of operation, improvements in predictability of the circuit behavior. Digital Zigbee Transmitter comprises of Cyclic Redundancy Check, Bit-to-Symbol block, Symbol-to-chip block, Modulator and Pulse shaping block. The work here is to show how we can design Zigbee transmitter with its specifications by using Verilog with less number of slices and Look up tables (LUTs).
The Internet of Things (IoT) is a description for embedded
and network cloud technologies that enable remote monitoring and control of sensors
and systems. IoT can be used in commercial, industrial, utility and residential applications.
You’ll find the IoT’s remote monitoring and control applications in hospitals, parking lots,
shipping departments, and even bathrooms.
Designing of Advanced and Efficient Tree Routing in Zigbee Wireless Networkrahulmonikasharma
Zigbee is a distinctive communication criterions principally aimed to be deployed for wireless personal area networks with low rate. It’s an IEEE 802.15.4 based usual incurring minimal amount of complexity, cut rate and low strength consumption. Zigbee cluster-tree be good-recognized zigbee topologies especially suitable for WSN’s consuming low strength and sustaining cut rate since it supports power rescue operations. When Zigbee cluster network generates more traffic, the performance of the network tends to decline due to lack of bandwidth utilization. The earlier techniques employed for the purpose was providing supple routing and increased bandwidth utilization. But they tend to compromise on an ideally and convergence rage of bandwidth usages. Thereby we propose as Enhanced Distributed Adoptive Parent (EDAP) based structure for Zigbee cluster tree networks that manages changing traffic weight communication at any granted moment. The nodes collecting the sensed data are appropriated depending on the traffic load demands. Such a framework when applied improves bandwidth of the network and in turn improves the overall performance of the network.
Scope of 5G technologies in 21st centuryanjansubbarao
Fifth-generation wireless (5G) is the latest iteration of cellular technology, engineered to greatly increase the speed and responsiveness of wireless networks. With 5G, data transmitted over wireless broadband connections can travel at multigigabit speeds, with potential peak speeds as high as 20 gigabits per second (Gbps) by some estimates. These speeds exceed wireline network speeds and offer latency of 1 millisecond (ms) or lower for uses that require real-time feedback. 5G will also enable a sharp increase in the amount of data transmitted over wireless systems due to more available bandwidth and advanced antenna technology.
SCALABILITY CONCERNS OF CHIRP SPREAD SPECTRUM FOR LPWAN APPLICATIONSijasuc
Divergent modulation schemes have been proposed for the Internet of Things (IoT). Low Power Wide Area
Networks (LPWAN) technologies are gaining unprecedented acceptance in IoT application of sensor
networks. Chirp Spread Spectrum (CSS) is a prominent modulation technique proposed for LPWAN. Chirps
can traverse long distance and are resilient to noise and Doppler effects. Noise resilience along with
transmission range and low power requirement makes CSS a preferred modulation scheme for sensor
networks. LoRaWANTM, with its physical (PHY) layer using CSS, has emerged as the widely accepted
LPWAN solution. By using CSS modulation with orthogonal spreading factors (SF), LoRa offers wide
coverage to LPWAN applications while supporting a high volume of devices. However, scalability
performance of CSS has not been inadequately modeled. As with the suitability of the modulation scheme,
there are concerns on how chirps interact with the surrounding as the number of deployments bursts out
into higher volumes. We evaluate CSS at ISM band 868 MHz for spreading factor 7 to 12 at bandwidth 125
kHz for performance and scalability. Simultaneous transmissions were simulated with repeated iterations
and conclusions are arrived on collisions rate, packet error rate, and bit error. Suitability of using CSS for
sensor networks for future deployments is commended.
Gi-Fi (Gigabit Fidelity) or Gigabit Wireless is the world's first handset incorporated on a solitary chip that works at 60GHz on CMOS process.
It transfers data at the rate of 5Gbps
It provides low power utilization in a scope of 10 meters .
The most striking feature of Gi-Fi technology is high security.
Gi-Fi refers to the faster versions of IEEE 802.11 standards.
It’s a 5x5 mm chip , Its small size makes it portable and deployment is quick.
Gi-Fi is a remote transmission framework which is multiple times quicker than Wi-Fi .
Now the files like videos, audios, or anything which has a large amount of data can be transferred from one device to another in a matter of seconds.
U.S. Wireless Overview & Outlook Presentation (V02C)Mark Goldstein
The latest version (V02C) of my overview of wireless spectrum, technologies and opportunities in just 20 slides. Tried to capture all of today's wireless essentials in this brief briefing. Enjoy!
Wireless Data Communication Techniques to Coordinate Distributed Rooftop PVs ...TELKOMNIKA JOURNAL
A necessity of the availability of communication network to provide data transfer amongst the
coordinated single-phase rooftop photovoltaic (PV) in unbalanced three-phase low voltage (LV) feeder is
essential since fetching data within the sensor of each PV unit requires real-time measurement and
reliable data exchange within smart grid (SG), loads and other PV units. The main objective of this paper is
to model the popular Wi-Fi, WiMax and ZigBee wireless data communication techniques into algorithms
using numerical analysis. Those communication technologies have low cost and low power consumption.
The benefits and drawbacks of those considered wireless data communications are shown as the required
data that transferred and appropriate coding is also proposed. The number of transmitted symbols and the
processing time delay of the proposed data coding are numerically analyzed, the results indicated that the
100% penetration level of PV that resulted higher injected reactive power back into the networks is able to
be overcome since the coordinated PVs along the feeder is communicating to lower the unbalanced
voltage profile.
Exact Solutions of Axially Symmetric Bianchi Type-I Cosmological Model in Lyr...IOSR Journals
In this paper we have obtained axially symmetric Bianchi type-I cosmological models for perfect
fluid distribution in the context of Lyra’s manifold. Exact solutions of the field equations are obtained by
assuming the expansion in the model is proportional to the shear . This leads to the condition
A Bn
where A and B are scale factors and n( 0) is a constant. Some kinematical and physical parameters of the
model have been discussed. The solutions are compatible with recent observations.
Designing of Advanced and Efficient Tree Routing in Zigbee Wireless Networkrahulmonikasharma
Zigbee is a distinctive communication criterions principally aimed to be deployed for wireless personal area networks with low rate. It’s an IEEE 802.15.4 based usual incurring minimal amount of complexity, cut rate and low strength consumption. Zigbee cluster-tree be good-recognized zigbee topologies especially suitable for WSN’s consuming low strength and sustaining cut rate since it supports power rescue operations. When Zigbee cluster network generates more traffic, the performance of the network tends to decline due to lack of bandwidth utilization. The earlier techniques employed for the purpose was providing supple routing and increased bandwidth utilization. But they tend to compromise on an ideally and convergence rage of bandwidth usages. Thereby we propose as Enhanced Distributed Adoptive Parent (EDAP) based structure for Zigbee cluster tree networks that manages changing traffic weight communication at any granted moment. The nodes collecting the sensed data are appropriated depending on the traffic load demands. Such a framework when applied improves bandwidth of the network and in turn improves the overall performance of the network.
Scope of 5G technologies in 21st centuryanjansubbarao
Fifth-generation wireless (5G) is the latest iteration of cellular technology, engineered to greatly increase the speed and responsiveness of wireless networks. With 5G, data transmitted over wireless broadband connections can travel at multigigabit speeds, with potential peak speeds as high as 20 gigabits per second (Gbps) by some estimates. These speeds exceed wireline network speeds and offer latency of 1 millisecond (ms) or lower for uses that require real-time feedback. 5G will also enable a sharp increase in the amount of data transmitted over wireless systems due to more available bandwidth and advanced antenna technology.
SCALABILITY CONCERNS OF CHIRP SPREAD SPECTRUM FOR LPWAN APPLICATIONSijasuc
Divergent modulation schemes have been proposed for the Internet of Things (IoT). Low Power Wide Area
Networks (LPWAN) technologies are gaining unprecedented acceptance in IoT application of sensor
networks. Chirp Spread Spectrum (CSS) is a prominent modulation technique proposed for LPWAN. Chirps
can traverse long distance and are resilient to noise and Doppler effects. Noise resilience along with
transmission range and low power requirement makes CSS a preferred modulation scheme for sensor
networks. LoRaWANTM, with its physical (PHY) layer using CSS, has emerged as the widely accepted
LPWAN solution. By using CSS modulation with orthogonal spreading factors (SF), LoRa offers wide
coverage to LPWAN applications while supporting a high volume of devices. However, scalability
performance of CSS has not been inadequately modeled. As with the suitability of the modulation scheme,
there are concerns on how chirps interact with the surrounding as the number of deployments bursts out
into higher volumes. We evaluate CSS at ISM band 868 MHz for spreading factor 7 to 12 at bandwidth 125
kHz for performance and scalability. Simultaneous transmissions were simulated with repeated iterations
and conclusions are arrived on collisions rate, packet error rate, and bit error. Suitability of using CSS for
sensor networks for future deployments is commended.
Gi-Fi (Gigabit Fidelity) or Gigabit Wireless is the world's first handset incorporated on a solitary chip that works at 60GHz on CMOS process.
It transfers data at the rate of 5Gbps
It provides low power utilization in a scope of 10 meters .
The most striking feature of Gi-Fi technology is high security.
Gi-Fi refers to the faster versions of IEEE 802.11 standards.
It’s a 5x5 mm chip , Its small size makes it portable and deployment is quick.
Gi-Fi is a remote transmission framework which is multiple times quicker than Wi-Fi .
Now the files like videos, audios, or anything which has a large amount of data can be transferred from one device to another in a matter of seconds.
U.S. Wireless Overview & Outlook Presentation (V02C)Mark Goldstein
The latest version (V02C) of my overview of wireless spectrum, technologies and opportunities in just 20 slides. Tried to capture all of today's wireless essentials in this brief briefing. Enjoy!
Wireless Data Communication Techniques to Coordinate Distributed Rooftop PVs ...TELKOMNIKA JOURNAL
A necessity of the availability of communication network to provide data transfer amongst the
coordinated single-phase rooftop photovoltaic (PV) in unbalanced three-phase low voltage (LV) feeder is
essential since fetching data within the sensor of each PV unit requires real-time measurement and
reliable data exchange within smart grid (SG), loads and other PV units. The main objective of this paper is
to model the popular Wi-Fi, WiMax and ZigBee wireless data communication techniques into algorithms
using numerical analysis. Those communication technologies have low cost and low power consumption.
The benefits and drawbacks of those considered wireless data communications are shown as the required
data that transferred and appropriate coding is also proposed. The number of transmitted symbols and the
processing time delay of the proposed data coding are numerically analyzed, the results indicated that the
100% penetration level of PV that resulted higher injected reactive power back into the networks is able to
be overcome since the coordinated PVs along the feeder is communicating to lower the unbalanced
voltage profile.
Exact Solutions of Axially Symmetric Bianchi Type-I Cosmological Model in Lyr...IOSR Journals
In this paper we have obtained axially symmetric Bianchi type-I cosmological models for perfect
fluid distribution in the context of Lyra’s manifold. Exact solutions of the field equations are obtained by
assuming the expansion in the model is proportional to the shear . This leads to the condition
A Bn
where A and B are scale factors and n( 0) is a constant. Some kinematical and physical parameters of the
model have been discussed. The solutions are compatible with recent observations.
Performance Evaluation of IEEE STD 802.16d TransceiverIOSR Journals
WiMAX ("Worldwide Interoperability for Microwave Access") technology is developed to meet the
growing demand of increased data rate and accessing the internet at high speeds. 802.16 family of standards is
officially called Wireless MAN in IEEE. Orthogonal frequency division multiplexing (OFDM) is multicarrier
modulation technique used in IEEE 802.16d (fixed WiMAX) communication standard. OFDM is used to
increase data rate of wireless medium with higher spectral efficiency. The proposed work is to evaluate
performance of IEEE Std 802.16d transceiver in MATLAB R2009b simulink environment. System performance
evaluated using BER vs SNR for different modulation technique such as 4 QAM, 16 QAM, 64 QAM under
different channel condition
A Comparative Study on Balance and Flexibility between Dancer and Non-Dancer ...IOSR Journals
Abstract: Dance is a form of art that normally involves rhythmic movement of the body and accompanied with
music. Movement of human body while performing dance can become a significant medium for communication,
feelings and emotions. It embraces movement, creation and performance. Dance helps to extend the limits of
human physical ability, expressiveness and spirit. When it comes to health dance can be a very effective way of
establishing a lasting healthy living. Anecdotally it can be said that dance potentially motivate and excite young
people. Dance is a non-competitive form of exercise which has positive effects on physical and mental health.
Young girls can be engaged in physical activity through dance. The author being a dancer in fervor and passion
as well as an aspirant of the profession Physical Education strived to conduct the study bearing the title “A
Comparative Study on Balance and Flexibility between Dancer and Non-Dancer Girls”. The researcher
selected 30 girls who are regularly involved in Dance and 30 girls who are non-dancer or rather sedentary on
the basis of purposive stratified random sampling from Bidhan Govt. Girl’s School, Dist. Nadia West Bengal as
the subjects of her study. She incorporated Sit and Reach test and Stork Stand Balance tests for assessment of
Flexibility and Balance respectively. With respect to data analysis initially descriptive statics like mean SD and
range and further paired sample T test was conducted to ascertain the degree of difference between the means
with the help of SPSS soft ware. Data analysis proved significant difference between the Dancer and NonDancer
girls both with respect to flexibility and Balance. In both the cases the Dancer girls proved to be better
though the differences were not statistically significant. Thus the author arrived at the conclusion that dance
involving passion, strength, stamina, enthusiasm, rhythm, amusement and many more could be a wonderful
fitness activity similar to other fitness activities like jogging, running, cycling, swimming etc.
Key words: Dance, Flexibility, Balance, Dancer, Non-Dancer.
Role of Educational Qualification of Consumers on Need Recognition: A Study w...IOSR Journals
Demographic variables are the most popular bases for segmenting the customer groups. One reason is that consumer needs, wants, preferences and usage rates often highly associated with demographic variables. Another is that demographic variables are easier to measure than the most of other type variables. Marketers are keenly interested in the size and growth rate of population in different cities, regions, nations; age distribution; educational levels; household patterns; and regional characteristics and movements. Because, on the basis of these measures only, marketers have to formulate their marketing strategies in order to fulfil the needs, wants and preferences of consumers. Moreover, demographic variables make known the ongoing trends, such as shifts in age, sex and income distribution that signal new business opportunities to the marketers. Demographic trends are highly reliable for the short and intermediate run. This paper, with a strong backing of literature, explains the role of educational qualification of consumers on recognizing a need for car.
Fault Detection Technique for Compact AES DesignIOSR Journals
Abstract: Cryptography is a method that has been developed to ensure the secrecy of messages and transfer data securely. Advanced Encryption Standard (AES) has been made as the first choice for many critical applications because of the high level of security and the fast hardware and software implementations, many of which are power and resource constrained and requires reliable and efficient hardware implementations. Naturally occurring and maliciously injected faults reduce the reliability of Advanced Encryption Standard (AES) and may leak confidential information. In this paper, a lightweight concurrent fault detection scheme for the AES is presented. In the proposed approach, the composite field S-box and inverse S-box are divided into blocks and the predicted parities of these blocks are obtained. For high speed applications, S-box implementation based on lookup tables is avoided. Instead, logic gate implementations based on composite fields are utilized. A compact architecture for the AES Mix-columns operation and its inverse is also presented. This parity-based fault detection scheme reaches the maximum fault coverage when compared to other methods of fault detection. The proposed fault detection technique for AES encryption and decryption has the least area and power consumption compared to their counterparts with similar fault detection capabilities. Index terms: AES, composite fields, parity prediction, fault detection, S-box.
Kinetic study of free and immobilized protease from Aspergillus sp.IOSR Journals
In the present investigation partially purified alkaline protease from Aspergillus sp. As#6 and As#7 strains were entrapped in calcium alginate beads and characterized using casein as a substrate. Temperature and pH maxima of protease from As#6 strain showed no changes before and after immobilization and remained stable at 450C and pH 9, respectively. However km value was slightly shifted from 4.5mg/ml to 5 mg/ml. Proteases from As#7 strain showed shifting in pH optima to a more alkaline range (10.0) as compared with free enzyme (9.0). Optimum temperature for protease from As#7 strain showed changes after immobilization and shifted from 650C to 850C. However there was no significant effect on Km value but Vmax of immobilized protease from As#7 strain was also shifted from 200U/ml to 370U/ml. Immobilized protease from As#6 strain was reused for 3 cycles with 22% loss in its activity whereas immobilize protease from As#7 strain was reused for 3 cycles with 17% loss in its activity. Protease from As#7 strain has a higher affinity for the substrate and higher proteolysis activity than protease from As#6 strain. The present work concludes that Aspergillus As#7 strain may be a good source of industrial protease
ZIGBEE TRANSMITTER FOR IOT WIRELESS DEVICESVLSICS Design
The rapid development in wireless networking has been witnessed in past several years, which aimed on high speed and long range applications. There are different protocol standards used for the short range wireless communication namely the Bluetooth, ZigBee, Wimax and Wi-Fi. Among these standards ZigBee is based on IEEE 802.15.4 protocol can meet a wider variety of real industrial needs due to its long-term battery operation and reliability of the mesh networking architecture. The increasing demand for low data rate and low power networking led to the development of ZigBee technology. This technology was developed for Wireless Personal Area Networks (WPAN), directed at control and military applications, where low cost, low data rate, and more battery life were main requirements. This paper presents VerilogHDL simulation of the Top level module (Cyclic Redundancy Check, Bit-to-Symbol block, Symbol-to-Chip block, OQPSK block and Pulse shaping) of the ZigBee transmitter for IoT applications.
Zigbee Transmitter for IoT Wireless DevicesVLSICS Design
The rapid development in wireless networking has been witnessed in past several years, which aimed on high speed and long range applications. There are different protocol standards used for the short range wireless communication namely the Bluetooth, ZigBee, Wimax and Wi-Fi. Among these standards ZigBee is based on IEEE 802.15.4 protocol can meet a wider variety of real industrial needs due to its long-term battery operation and reliability of the mesh networking architecture. The increasing demand for low data rate and low power networking led to the development of ZigBee technology. This technology was developed for Wireless Personal Area Networks (WPAN), directed at control and military applications, where low cost, low data rate, and more battery life were main requirements. This paper presents VerilogHDL simulation of the Top level module (Cyclic Redundancy Check, Bit-to-Symbol block, Symbol-to-Chip block, OQPSK block and Pulse shaping) of the ZigBee transmitter for IoT applications.
Zigbee Based Wireless Sensor Networks for Smart CampusIJMER
A network which connects a bunch of distributed low-power sensor nodes together, with each node dedicated to a predefined operation can be visualized as a Wireless Sensor Network (WSN).
Implementation of MSK Modulation Scheme for Zigbee System / IEEE 802.15.4 Phy...ijtsrd
In this work physical layer simulation of IEEE 802.15.4 / ZigBee protocol has been done. The proposed work is the implementation of ZigBee system according to the protocol description. In this work we have simulated ZigBee system first with conventional OQPSK modulation technique, then the simulations are performed for MSK modulation, which is through OQPSK modulation. Simulation results for BER showing the average 79.43 % improvement in BER for Proposed MSK compared with OQPSK modulation scheme. For a target BER of 10-2 the SNR required is 4 dB for this work i.e. for MSK, as compared to 10 dB for conventional OQPSK. Hence, an improvement of 6 dB less SNR. For a target BER of 10-2 the SNR required is 4 dB for this work i.e. for MSK, as compared to 5.2 dB with [1]. Hence, an improvement of 1.2 dB less SNR. Kumari Pooja | Shailesh Khaparkar | Pankaj Sahu"Implementation of MSK Modulation Scheme for Zigbee System / IEEE 802.15.4 Physical Layer" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-4 , June 2018, URL: http://www.ijtsrd.com/papers/ijtsrd14609.pdf http://www.ijtsrd.com/engineering/electronics-and-communication-engineering/14609/implementation-of-msk-modulation-scheme-for-zigbee-system--ieee-802154-physical-layer/kumari-pooja
Gas leakage is an important problem. It wastes energy and sometimes it causes harmful effects to lives. We have limited energy resources. Proper utilization of resources is need of the time. We have proposed a gas safety management system
using ZigBee to monitor flow and pressure of gas, earthquake, temperature, smoke and leak of methane. It also provides a health safety system simultaneously by automating the associated devices with its embedded programmed feature to procure the environment by completely eradicating the harmful source. Through this dynamic technology, we can establish a well economic and health caring system in this
rapidly developing era to excel our country.
Zigbee based voice controlled wireless smart home systemijwmn
In this paper a voice controlled wireless smart home system has been presented for elderly and disabled
people. The proposed system has two main components namely (a) voice recognition system, and (b)
wireless system. LabView software has been used to implement the voice recognition system. On the other
hand, ZigBee wireless modules have been used to implement the wireless system. The main goal of this
system is to control home appliances by using voice commands. The proposed system can recognize the
voice commands, convert them into the required data format, and send the data through the wireless
transmitter. Based on the received data at the wireless receiver associated with the appliances desired
switching operations are performed. The proposed system is a low cost and low power system because
ZigBee is used. Additionally the proposed system needs to be trained of voice command only once. Then the
system can recognize the voice commands independent of vocabulary size, noise, and speaker
characteristics (i.e., accent).
QoS of Wi-Fi performance based on signal strength and channel for indoor camp...journalBEEI
The implementation of Wi-Fi on campuses brings huge benefits for campus users in communications and education development. Some campuses face existing poor quality of service (QoS) on the Wi-Fi performance which is also unjustified and issues on unsatisfied connections. This research aims to analyses the Wi-Fi performance of the campus network for three indoor access points. Signal strength, usage percentage, channel utilization, and the number of clients count per access points are measured. Results show that 56% is the highest signal percentage and the lowest signal percentage is at 1%. Access point of Ustudent is the highest at 53% and lowest at 38%. The highest signal strength of -45dBm is found and the other two are below by -2 dBm. The lowest signal strength is at -95 dBm. SSID CCNA_1 is identified has the best signal strength compared to other SSIDs because it runs on 5 GHz frequency. The most channels used are channels 1, 4, and 6. Respectively 151, 67, and 57 users are connected to Ustudent, UHotspot, and CCNA_1. This study is significant for the QoS in a campus network in providing good network services. Thus, the QoS on Wi-Fi performance is improvised, monitored and analyzed for continues supports users in the campus network successfully.
THE FUTURE DIRECTIONS IN EVOLVING WI-FI: TECHNOLOGIES, APPLICATIONS AND SERVICESijngnjournal
New research directions will lead to fundamental changes in the design of future WiFi networks. However, with an explosion of wireless mobile applications and services, there are still some challenges on the spectrum crisis and high energy consumption. Wireless system designers have been facing the continuously increasing demand for high data rates and spectrum sharing required by new wireless applications and therefore have started research on future WiFi wireless technologies that are expected to be deployed beyond 2020. In this article we propose WiFi key technologies and there prospective: WiFi CERTIFIEDTM ac and Wi Fi CERTIFIED passpointTM . Also represent super WiFi such as WiGig solution, White Fi, HetNets and Cognitive Fi. Future applications and services facing these potential technologies are also
discussed.
Gi-Fi stands for Gigabit Wireless. GIFI or Gigabit Wireless is the world’s first transceiver integrated at 60GHz a wireless transmission system which is ten times faster than WI-FI.
It is fabricated using (CMOS) technology, the technology used to print silicon chips.
After the read, you will learn the characteristics of the 6 wireless protocols IEEE protocols: LoRa, NB-IoT, ZigBee, Wi-Fi, BLE, WiMax.
In the field of IoT, a wide range of communication technologies wireless protocols exist simultaneously. In terms of transmission distance, there are BLE, WI-FI, ZigBee, sub1G, etc., which are widely used in the context of local wireless networks, such as wearable, home, and enterprise applications.
A Study on the ZigBee Wireless Communication for IAQ Monitoring of Undergroun...ijtsrd
In this paper, the 424MHz ZigBee module, which uses a relatively lower frequency for wireless transmission and reception, is found to have a much higher data transfer rate than that of the 2.4GHz XBee PRO in the presence of obstacles such as subway waiting rooms, platform like stairs, complicated structures, and crowded passengers. This indicates that low frequency radio waves have better diffraction characteristics and thus better performance in face of obstacles. Therefore, it was found that low frequency Zigbee modules are advantageous in areas with complex structures such as subways. Tae-In Hyon | Gyu-Sik Kim "A Study on the ZigBee Wireless Communication for IAQ Monitoring of Underground Subway Stations" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5 , August 2019, URL: https://www.ijtsrd.com/papers/ijtsrd26820.pdf Paper URL: https://www.ijtsrd.com/engineering/electrical-engineering/26820/a-study-on-the-zigbee-wireless-communication-for-iaq-monitoring-of-underground-subway-stations/tae-in-hyon
This paper presents a comparative study of IEEE 802.11 a/b/g/n wireless LAN standards in an ELearning classroom network using adhoc networks as communication support. The evaluation is performed through a series of scenarios schematizing communication between students and practitioners in an educational context. The first objective is to plan the physical layer via the choice of the suitable transmission standard that satisfy the implementation specifications. Given the real-time traffic considered, a good traffic transmission must be ensured.
Similar to Impact of Frequency Offset on Interference between Zigbee and Wifi for Smart Grid Applications (20)
Forklift Classes Overview by Intella PartsIntella Parts
Discover the different forklift classes and their specific applications. Learn how to choose the right forklift for your needs to ensure safety, efficiency, and compliance in your operations.
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About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
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Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Event Management System Vb Net Project Report.pdfKamal Acharya
In present era, the scopes of information technology growing with a very fast .We do not see any are untouched from this industry. The scope of information technology has become wider includes: Business and industry. Household Business, Communication, Education, Entertainment, Science, Medicine, Engineering, Distance Learning, Weather Forecasting. Carrier Searching and so on.
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In my system we have to make a system by which a user can record all events coordinated by a particular faculty. In our proposed system some more featured are added which differs it from the existing system such as security.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
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This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Impact of Frequency Offset on Interference between Zigbee and Wifi for Smart Grid Applications
1. IOSR Journal of Electronics and Communication Engineering (IOSR-JECE)
e-ISSN: 2278-2834,p- ISSN: 2278-8735.Volume 7, Issue 5 (Sep. - Oct. 2013), PP 59-64
www.iosrjournals.org
www.iosrjournals.org 59 | Page
Impact of Frequency Offset on Interference between Zigbee and
Wifi for Smart Grid Applications
Er. Anamika Vatsal 1
, Prof. Mehajabeen Fatima2
Deptt.of Electronics & Communication
Sagar Institute of Research & Technology, Bhopal, India
Abstract: The Zigbee is a low cost communication technology used for low data rate communication system
such as industrial automation etc. Because of its low complexity it is widely adopted for many applications. But
the utilization of the same spectrum band by the WLAN system causes interference between both the systems.
The proposed approach presents an analysis of this interference effect on Zigbee system when operated with
WLAN sources at different distances and different power. It also analyzes the effect when a frequency offset is
established between both systems. The simulation results shows that a small offset can provide sufficient
improvement in the performance.
Keywords: Smart Grids, Zigbee Network, Mesh Network, Wireless LAN (WLAN), BER.
I. Introduction
The application of the electronics is gaining importance in the industrial automations because of its
better performance and lower possibility of error and low cost as compared with manual controlling. A smart
grid is a modernized electrical grid that uses information and communications technology to gather and act on
information, such as information about the behaviors of suppliers and consumers, in an automated fashion to
improve the efficiency, reliability, economics, and sustainability of the production and distribution of electricity.
Although to effectively operate such systems it is required to gather the information from the various parts of
the plant and then it is processed by a central processing system. Since it is difficult and costly to take wires
through every part of plant, an effective wireless solution is required. It is also noted that in most of the cases,
only small amount of data is required to send. All these requirements make the zigbee as an optimal solution
because it provides low cost, large range, low power, and low complexity solution at 250 Kbits/s data rate along
with supporting various topologies. Studies have shown that till now the Zigbee is successfully applied for
industrial automation, wireless sensor network, home automation, building automation and medical data
collection, smart grids etc. Because of many such applications, it is required to investigate the performance of
zigbee under different physical scenarios to make it an effective and robust communication system which can be
used for critical applications such as life supporting system. This paper is also an effort towards it. The
numerous challenges underlying due to interference amongst Zigbee and WiFi in the 2.4 GHz ISM band served
as the motivation for this work. Despite of the extensive existing research in Zigbee and WiFi coexistence, no
work regarding the influence of comparative study of frequency offset on BER and SINR using matlab software
can be found in the related work. The rest of the paper is organized in the following manner. The second section
provides a brief review of the related works. The third section describes the operation of Zigbee followed by the
working of WLAN in fourth section. The fifth section presents the proposed work and the sixth section details
the simulation results for the proposed work. Finally, the conclusion is drawn in section seventh section.
II. Literature Review
This section presents a brief review of the literatures related to the same field. Wail Mardini et al [1]
studied the mutual impact of WiFi interference on ZigBee channels by using QualNet Simulator and
computed the Packet Delivery Rate (PDR) for both ZigBee and WiFi nodes. The obtained results show that
ZigBee has little impact on WiFi Packets, and WiFi affects ZigBee packets with different degrees based on the
traffic intensity and number of nodes. James Hou et al [2] proposed the interference minimizing technique
between 802.11 and ZigBee medical sensors. Chieh-Jan Mike Liang et al [3] designed BuzzBuzz to mitigate
WiFi interference through header and payload redundancy. Multi-Headers provides header redundancy giving
ZigBee nodes multiple opportunities to detect incoming packets. Then, TinyRS, a full-featured Reed Solomon
library for resource-constrained devices, helps decoding polluted packet payload. On a medium-sized testbed,
BuzzBuzz improves the ZigBee network delivery rate by 70%. Furthermore, BuzzBuzz reduces ZigBee
retransmissions by a factor of three, which increases the WiFi throughput by 10%. Jun Huang et al [4] proposed
a novel approach that enables ZigBee links to achieve assured performance in the presence of heavy WiFi
interference. First, based on statistical analysis of real-life network traces, they present a Pareto model to
accurately characterize the white space in WiFi traffic. Second, we analytically model the performance of a
2. Impact of Frequency Offset on Interference between Zigbee and Wifi for Smart Grid Applications
www.iosrjournals.org 60 | Page
ZigBee link in the presence of WiFi interference. Third, based on the white space model and our analysis, we
develop a new ZigBee frame control protocol called WISE, which can achieve desired trade-offs between link
throughput and delivery ratio. Their extensive experiments on a testbed of 802.11 netbooks and 802.15.4 TelosB
motes show that, in the presence of heavy WiFi interference, WISE achieves 4x and 2x performance gains over
B-MAC and a recent reliable transmission protocol, respectively, while only incurring 10.9% and 39.5% of their
overhead. Yanchao Mao et al [5] presented an experimental analysis of the interference between IEEE 802.15.4
and IEEE 802.11b/g and their measurement results are valuable for the real world deployment and design of the
network integrated IEEE 802.15.4 and IEEE 802.11b/g.
III. Zigbee Communication
ZigBee is a specification for a suite of high level communication protocols used to create personal area
networks built from small, low-power digital radios. ZigBee is based on an IEEE 802.15 standard. Though low-
powered, ZigBee devices often transmit data over longer distances by passing data through intermediate devices
to reach more distant ones, creating a mesh network; i.e., a network with no centralized control or high-power
transmitter/receiver able to reach all of the networked devices. The decentralized nature of such wireless ad hoc
networks makes them suitable for applications where a central node can't be relied upon. ZigBee is used in
applications that require a low data rate, long battery life, and secure networking. ZigBee has a defined rate of
250 Kbit/s, best suited for periodic or intermittent data or a single signal transmission from a sensor or input
device. Applications include wireless light switches, electrical meters with in-home-displays, traffic
management systems, and other consumer and industrial equipment that requires short-range wireless transfer of
data at relatively low rates. The technology defined by the ZigBee specification is intended to be simpler and
less expensive than other WPANs, such as Bluetooth or Wi-Fi. ZigBee networks are secured by 128 bit
symmetric encryption keys. In home automation applications, transmission distances range from 10 to 100
meters line-of-sight, depending on power output and environmental characteristics [1]. ZigBee was conceived in
1998, standardized in 2003 and revised in 2006. The name refers to the waggle dance of honey bees after their
return to the beehive [2]. ZigBee operates in the industrial, scientific and medical (ISM) radio bands; 868 MHz
in Europe, 915 MHz in the USA and Australia and 2.4 GHz in most jurisdictions worldwide. Data transmission
rates vary from 20 kilobits/second in the 868 MHz frequency band to 250 kilobits/second in the 2.4 GHz
frequency band [3].
The ZigBee network layer natively supports both star and tree typical networks, and generic mesh
networks. Every network must have one coordinator device, tasked with its creation, the control of its
parameters and basic maintenance. Within star networks, the coordinator must be the central node. Both trees
and meshes allows the use of ZigBee routers to extend communication at the network level.
IV. Wireless Lan (Wlan), Ieee 802.11
A wireless local area network (WLAN) links two or more devices using some wireless distribution
method (typically spread-spectrum or OFDM radio), and usually providing a connection through an access point
to the wider Internet. This gives users the mobility to move around within a local coverage area and still be
connected to the network. Most modern WLANs are based on IEEE 802.11 standards, marketed under the Wi-Fi
brand name.
IEEE 802.11 is a set of medium access control (MAC) and physical layer (PHY) specifications for
implementing wireless local area network (WLAN) computer communication in the 2.4, 3.6, 5 and 60 GHz
frequency bands. They are created and maintained by the IEEE LAN/MAN Standards Committee (IEEE 802).
The base version of the standard was released in 1997 and has had subsequent amendments. The standard and
amendments provide the basis for wireless network products using the Wi-Fi brand. While each amendment is
officially revoked when it is incorporated in the latest version of the standard, the corporate world tends to
market to the revisions because they concisely denote capabilities of their products. As a result, in the market
place, each revision tends to become its own standard.
The 802.11 family consist of a series of half-duplex over-the-air modulation techniques that use the same basic
protocol. The most popular are those defined by the 802.11b and 802.11g protocols, which are amendments to
the original standard. 802.11-1997 was the first wireless networking standard in the family, but 802.11a was the
first widely accepted one, followed by 802.11b and 802.11g. 802.11n is a new multi-streaming modulation
technique. Other standards in the family (c–f, h, j) are service amendments and extensions or corrections to the
previous specifications.
802.11b and 802.11g use the 2.4 GHz ISM band, operating in the United States under Part 15 of the
U.S. Federal Communications Commission Rules and Regulations. Because of this choice of frequency band,
802.11b and g equipment may occasionally suffer interference from microwave ovens, cordless telephones and
Bluetooth devices. 802.11b and 802.11g control their interference and susceptibility to interference by using
3. Impact of Frequency Offset on Interference between Zigbee and Wifi for Smart Grid Applications
www.iosrjournals.org 61 | Page
direct-sequence spread spectrum (DSSS) and orthogonal frequency-division multiplexing (OFDM) signaling
methods, respectively.
Figure 1: Zigbee and WLAN channels in 2.4 GHz band[12]
802.11a uses the 5 GHz U-NII band, which, for much of the world, offers at least 23 non-overlapping
channels rather than the 2.4 GHz ISM frequency band, where adjacent channels overlap and contain only 3 non-
overlapping channels as shown in Fig. 1. Better or worse performance with higher or lower frequencies
(channels) may be realized, depending on the environment.
The segment of the radio frequency spectrum used by 802.11 varies between the countries. In the US,
802.11a and 802.11g devices may be operated without a license, as allowed in Part 15 of the FCC Rules and
Regulations. Frequencies used by channels one through six of 802.11b and 802.11g fall within the 2.4 GHz
amateur radio band. Licensed amateur radio operators may operate 802.11b/g devices under Part 97 of the FCC
Rules and Regulations, allowing increased power output but not commercial content or encryption.
V. Proposed Work
In this paper, we presented an analysis of interference between IEEE 802.11 systems and Zigbee
operating under 2.4 GHz band. The simulation is made using Matlab v 7.5 software. In the simulation, it is
assumed that both the systems are continuously transmitting and receiving data at a fixed rate while the distance
and the power of the WiFi transmitter are being be varied as per the analysis requirements.
The channel is considered to be a Rayleigh channel assuming no dominant propagation along the line of sight.
Additive White Gaussian Noise(AWGN) is introduced within this channel.
The zigbee model is developed in accordance with IEEE 802.15.4 standards document, every four bits
are mapped into a symbol and each symbol spreads to a 32-chip almost orthogonal PN sequence, thus a
spreading table is set in a spreading block. The transmission rate is 250 kbps at 2.4 GHz for ZigBee, while 11
Mbps for WiFi.
5.1 Measures used for Analysis
BER:The bit error rate or bit error ratio (BER) is the number of bit errors divided by the total number of
transferred bits during a studied time interval[14]
𝐵𝐸𝑅 =
𝑇𝑜𝑡𝑎𝑙 𝐸𝑟𝑟𝑜𝑟𝑠
𝑇𝑜𝑡𝑎𝑙 𝐵𝑖𝑡𝑠
SINR:signal-to-interference-plus-noise ratio (SINR) which can be defined as [13]
𝑆𝐼𝑁𝑅 =
𝑃𝑠𝑖𝑔𝑛𝑎𝑙
𝑃𝑛𝑜𝑖𝑠𝑒 + 𝑃𝑖𝑛𝑡𝑒𝑟𝑓𝑒𝑟𝑒𝑛𝑐𝑒
Path Loss: The path loss model represents the power loss between transmitter and receiver and is given by [15]
𝐿 𝑝 𝑑 =
20𝑙𝑜𝑔10
4𝜋𝑑
𝜆
, 𝑑 ≤ 𝑑0 𝑒𝑙𝑠𝑒
20𝑙𝑜𝑔10
4𝜋𝑑
𝜆
+ 10𝑛𝑙𝑜𝑔10(
𝑑
𝑑0
)
Where𝑑0 is a break point. We set 𝑛 equals to 3.3 and𝑑0 is 8 m.
VI. Simulation Results
Scenario 1:
In this scenario, the signal to interference ratio is estimated for different distances between zigbee
receiver and the Wifi transmitter. Here the zigbee transmitter is placed at 1 meter distance of its receiver while
the distance of Wifi transmitter is increased gradually from 1 meter to 10 meters and the value of AWGN is -
3dB and the Wifi is working at 11 mbps data rate.
4. Impact of Frequency Offset on Interference between Zigbee and Wifi for Smart Grid Applications
www.iosrjournals.org 62 | Page
Figure 2a: Simulated SINR performances for different offset frequencies with varying distance, the graph
shows that offset improves the SINR by 10 times when offset increased from 2 to 10 Mhz for every value of
distance.
Figure 2b: Simulated BER performances for different offset frequencies with distance variation. The graph
shows that the BER increases exponentially with offset frequency increment.
Scenario 2:
All parameters are similar to first scenario except the AWGN varies and the distance is remain constant to 1
meter.
Figure 3: Simulated BER performances for different offset frequencies with varying AWGN.The offset
variation doesn’t affect the BER variation (overlapping graphs).The variation in BER is due to SINR only.
Scenario 3:
In this scenario, the signal to interference ratio is estimated for different distances between zigbee
receiver and the Wifi transmitter. Where the power of zigbee transmitter is placed at 1 meter distance of its
receiver while the distance of Wifi transmitter is increased gradually from 1 meter to 10 meters and the value of
AWGN is -3dB and the Wifi is working at 5.5 mbps data rate.
5. Impact of Frequency Offset on Interference between Zigbee and Wifi for Smart Grid Applications
www.iosrjournals.org 63 | Page
Figure 4a: Simulated BER performances for different offset frequencies with distance variation. The graph
shows that the BER decreases exponentially with offset frequency increment.
Figure 4b: Simulated BER performances for different offset frequencies with distance variation. The graph
shows that the BER decreases exponentially with offset frequency increment.
Scenario 4:
All parameters are similar to first scenario except the AWGN varies and the distance remains constant to 1
meter.
Figure 5: Simulated BER performances for different offset frequencies with varying AWGN. The offset
variation doesn’t affect the BER variation(overlapping graphs).The variation in BER is due to SINR only.
VII. Conclusion
In the paper, the simulation for the analysis of the interference is performed for different conditions and
the values of SINR and the BER is measured. From the results it can be concluded that the interference between
these systems can be avoided by providing the small offset which can reduce the SINR by 10 times (refer to
graphs 1a and 3a) and BER due to interference by 100 times (refer to graphs 1b and 3b). BER due to
interference is computed and analyzed for frequencies above 8 MHz which is considerably beneficial towards
the smart grid applications and is true for both the data rates. The offset variation, however, doesn’t improve the
AWGN performance of the system(refer to graphs 3 and 5). Hence we can say that small frequency offset can
be used instead of incorporating complex protocols. Nevertheless, this paper talks about the analysis and
observation of offset frequency to trace out the behavior of BER and SINR. This work can further be carried out
for other wireless technologies like WiMax with comparatively lower interference than Zigbee.
Acknowledgement
The Author would like to thanks The Rajiv Gandhi Proudyogiki Vishwavidyalaya, Bhopal for its
generous support and the Sagar Institute of Research & Technology, Bhopal for their hospitality during my
academic period 2011-2013.She wishes to thanks Prof. Mehajabeen Fatima for her help and encouragement.
6. Impact of Frequency Offset on Interference between Zigbee and Wifi for Smart Grid Applications
www.iosrjournals.org 64 | Page
References:
[1] Howitt, I, Gutierrez, JA. ZigBee low rate-wireless personal area network coexistence issues. Wireless Communications and
Networking, 2003; (3): 1481- 1486.
[2] Axel S, Voicu FG. Coexistence of ZigBee with other Systems in the 2.4 GHz-ISM-Band. In IEEE Instrumentation and
Measurement Technology’ 2005 May, Ottawa: Canada.1786–1791.
[3] Marina P, Janne R, Petri M, Saverio L. Performance Study of ZigBee Using Measurements and Simulations. Proceedings of IEEE
Wireless Communications and Networking Conference 2006 April ; Las Vegas, NV:USA; 487–492.
[4] Soo YS, Hong SP, Wook HK. Mutual interference analysis of ZigBee and WiFi-b. Computer and Telecommunications Networking
2007;(51) : 3338–3353.
[5] HUO H, XU Y, Mikael G, ZHANG H. Coexistence of 2.4 GHz sensor networks in home environment. China Universities of Posts
and Telecommunications 2010; 17(1) :9-18.
[6] Antoine BB, Ashish M, Marco Z. Experimental Evaluation of Interference Mitigation on The 2.4 GHz ISM band Using Channel
Hopping, Proceedings of the IEEE Wireless Days’ October 2010; Venice:Italy: 1-5.
[7] Jun H, Guoliang X, Gang Z, Ruogu Z. Beyond Co-existence: Exploiting WiFi White Space for ZigBee Performance Assurance. The
18th IEEE International Conference on Network Protocols (ICNP)’ October 2010; Kyoto: Japan. 305-314.
[8] Shahin F. ZigBee Wireless Networks and Transceivers. USA: Newnes; 2008: 339. ISBN: 978-0-7506-8393-7.
[9] Cirronet, Inc. ZigBee™ Wireless Transceiver Engineering Options. 2005. White Paper.
[10] Paolo B, Prashant P, Vince WC Chook, Stefano C, Alberto G, YFun Hu. Wireless Sensor Networks: A Survey on the State of the
Art and the 802.15.4 and ZigBee Standards. Computer Communications. 2007; (30):1655-1695.
[11] William L, Lee W McKnight. Wireless Internet Access: 3G vs. WiFi Madrid. Telecommunications Policy 2003. 351–370.
[12] www.ni.com: 2.4GHz_Spectrum.jpg
[13] Peizhong Yi, Abiodun Iwayemi and Chi Zhou. “Developing ZigBee Deployment Guideline Under WiFi Interference for Smart Grid
Applications” in IEEE Transactions on Smart Grids, 2011 March, Chicago, USA : 1949-3053.
[14] Ron Franac. “BER and MER Fundamentals” by CISCO Systems, 2007.
[15] Soo Young Shin, Jeong Seok Kang, Hong Seong Park. “Packet Error Rate Analysis of ZigBee under Interferences of Multiple
Bluetooth Piconets” in IEEE, April, 2009; ISBN: 978-1-4244-2517