The 802.11 networks (wireless fidelity (WiFi) networks) have been the main wireless internet access infrastructure within houses and buildings. Besides access point placement, building architectures contribute to the WiFi signal spreading. Even dough WiFi installation in buildings becomes prevalent; the building architectures still do not take WiFi-friendliness into considerations. Current research on building and WiFi are on access point location, location based service and home automation. In fact, the more friendly the building to WiFi signal, the more efficient the 802.11 based wireless infrastructure. This paper introduces the term of WiFi-friendly building by considering signal propagations, the obstacle impact, as well as proposing an ornament-attaced reflector and a hole-in-the-wall structure to improve WiFi signal distribution. Experiment results show that obstacle materials made of concrete reducing WiFi signal the most, followed by metal and wood. Reflecting materials are able to improve the received signal level, for instance, the implemented ornament-attached reflector is able improving the received signal up to 6.56 dBm. Further, the hole-in-the-wall structure is successfully increasing WiFi signal up to 2.3 dBm.
This document discusses the testing and evaluation of a video transmission system using a wireless local area network (WLAN) access point for instructional video broadcasting at a university. The system was built using a computer server to store and transmit instructional videos to clients via a WLAN access point. Tests were conducted to analyze network performance parameters like throughput, packet loss, and delay. Results showed the system could successfully broadcast videos from the server to clients in different quality settings over the university's 100 Mbps local network via the access point. This research aims to understand how to implement a wireless network using an access point for instructional video broadcasting in a university setting.
This document discusses telecommunication services for high-rise buildings. It covers the installation process including main distribution frames, fiber termination boxes, and riser closets. Safety precautions and management systems are also outlined. The advantages of telecommuting include flexibility in work location and time. Optical fiber cables provide high bandwidth but are more expensive to install than copper cables. Case studies demonstrate best practices for telecommunication infrastructure design in high-rise buildings.
Presented by Reshma M.R.
Wi-Fi, which stands for “Wireless Fidelity”, is a radio technology that networks computers so
they connect to each other and to the Internet without wires.
WiMAX, meaning Worldwide Interoperability for Microwave Access, is a
telecommunications technology that provides wireless transmission of data using a variety of
transmission modes, from point-to-point links to portable internet access
This document investigates building penetration loss for GSM signals in selected building structures in Kaduna, Nigeria. Measurements were taken using a spectrum analyzer across five network providers' frequencies in four building types: mud building with rusted/unrusted iron roof, sandcrete building with rusted/unrusted iron roof. Results showed mud buildings with rusted iron roofs experienced the highest average signal losses of -59.08dBm. Mud buildings with unrusted iron roofs saw losses of -53.63dBm. Sandcrete buildings with rusted iron roofs had losses of -50.32dBm, while sandcrete buildings with unrusted iron roofs had the lowest losses of -45.37dB
This document provides details on the installation process and management system for telecommunication services in a high-rise building. It discusses the various components involved from the manhole and underground entry duct, to the main telecommunication room, fibre termination boxes, riser rooms, mobile service rooms, consolidation cabinets, and fibre wall sockets. Containment systems including vertical and horizontal cabling are also outlined. Lastly, it emphasizes the importance of an effective management system to support the large number of users and ensure consistent, reliable access.
Telecommunication systems for high-rise buildings require careful planning and installation. Key components include:
1. Distribution cables run from the main distribution frame in the basement to telecommunication rooms on each floor. Vertical ducts contain these cables and are centrally located.
2. The main distribution frame in the basement connects the building to the central office. It is the main hub for telecommunication equipment and connections.
3. Telecommunication rooms on each floor contain equipment and allow cables to connect to outlets on that floor. The rooms must meet safety and accessibility standards.
This document certifies that four students - Sumon Paul, MD. Arifur Rahman, MD. Jakir Hossain, and MD. Ariful Huq - from Stamford University successfully completed their honors project on "Implementation of WLAN Project" under the supervision of Tanbir Ibne Anower. The project focused on analyzing the technology within wireless networking and its characteristics.
A Study on Guided and Unguided Transmission Medias and a Proposed Idea to Ext...IJERA Editor
Networking in computers enables sharing of information by interconnecting the computing devices. The sharing
of information is possible through transmission media. The transmission media is classified as wired or wireless.
Wired media have limitation in geography. But wireless is not bounded by geography. In the wireless world the
first wireless technology was infrared and it was a very slow technology. So, inventions were continued to find a
better wireless technology, finally we got Bluetooth, Wi-Fi ,WI-MAX and Gi-Fi. In this paper we discussed
about different Wired and Wireless Technologies and given a proposed idea to extend the limit of Gi-Fi beyond
10 meters.
This document discusses the testing and evaluation of a video transmission system using a wireless local area network (WLAN) access point for instructional video broadcasting at a university. The system was built using a computer server to store and transmit instructional videos to clients via a WLAN access point. Tests were conducted to analyze network performance parameters like throughput, packet loss, and delay. Results showed the system could successfully broadcast videos from the server to clients in different quality settings over the university's 100 Mbps local network via the access point. This research aims to understand how to implement a wireless network using an access point for instructional video broadcasting in a university setting.
This document discusses telecommunication services for high-rise buildings. It covers the installation process including main distribution frames, fiber termination boxes, and riser closets. Safety precautions and management systems are also outlined. The advantages of telecommuting include flexibility in work location and time. Optical fiber cables provide high bandwidth but are more expensive to install than copper cables. Case studies demonstrate best practices for telecommunication infrastructure design in high-rise buildings.
Presented by Reshma M.R.
Wi-Fi, which stands for “Wireless Fidelity”, is a radio technology that networks computers so
they connect to each other and to the Internet without wires.
WiMAX, meaning Worldwide Interoperability for Microwave Access, is a
telecommunications technology that provides wireless transmission of data using a variety of
transmission modes, from point-to-point links to portable internet access
This document investigates building penetration loss for GSM signals in selected building structures in Kaduna, Nigeria. Measurements were taken using a spectrum analyzer across five network providers' frequencies in four building types: mud building with rusted/unrusted iron roof, sandcrete building with rusted/unrusted iron roof. Results showed mud buildings with rusted iron roofs experienced the highest average signal losses of -59.08dBm. Mud buildings with unrusted iron roofs saw losses of -53.63dBm. Sandcrete buildings with rusted iron roofs had losses of -50.32dBm, while sandcrete buildings with unrusted iron roofs had the lowest losses of -45.37dB
This document provides details on the installation process and management system for telecommunication services in a high-rise building. It discusses the various components involved from the manhole and underground entry duct, to the main telecommunication room, fibre termination boxes, riser rooms, mobile service rooms, consolidation cabinets, and fibre wall sockets. Containment systems including vertical and horizontal cabling are also outlined. Lastly, it emphasizes the importance of an effective management system to support the large number of users and ensure consistent, reliable access.
Telecommunication systems for high-rise buildings require careful planning and installation. Key components include:
1. Distribution cables run from the main distribution frame in the basement to telecommunication rooms on each floor. Vertical ducts contain these cables and are centrally located.
2. The main distribution frame in the basement connects the building to the central office. It is the main hub for telecommunication equipment and connections.
3. Telecommunication rooms on each floor contain equipment and allow cables to connect to outlets on that floor. The rooms must meet safety and accessibility standards.
This document certifies that four students - Sumon Paul, MD. Arifur Rahman, MD. Jakir Hossain, and MD. Ariful Huq - from Stamford University successfully completed their honors project on "Implementation of WLAN Project" under the supervision of Tanbir Ibne Anower. The project focused on analyzing the technology within wireless networking and its characteristics.
A Study on Guided and Unguided Transmission Medias and a Proposed Idea to Ext...IJERA Editor
Networking in computers enables sharing of information by interconnecting the computing devices. The sharing
of information is possible through transmission media. The transmission media is classified as wired or wireless.
Wired media have limitation in geography. But wireless is not bounded by geography. In the wireless world the
first wireless technology was infrared and it was a very slow technology. So, inventions were continued to find a
better wireless technology, finally we got Bluetooth, Wi-Fi ,WI-MAX and Gi-Fi. In this paper we discussed
about different Wired and Wireless Technologies and given a proposed idea to extend the limit of Gi-Fi beyond
10 meters.
Analysis of wifi and wimax and wireless network coexistenceIJCNCJournal
Wireless networks are very popular nowadays. Wireless Local Area Network (WLAN) that uses the IEEE 802.11 standard and WiMAX (Worldwide Interoperability for Microwave Access) that uses the IEEE802.16 standard are networks that we want to explore. WiMAX has been developed over 10 years, but it is still unknown by most people. However, compared with WLAN, it has many advantages in transmission speed and coverage area. This paper will introduce these two technologies and make comparisons between WiMAX and WiFi. In addition, wireless network coexistence of WLAN and WiMAX will be explored through simulation. Lastly we want to discuss the future of WiMAX in relation to WiFi.
Fiber optic cable packages optical fibers in a protective structure for installation and use in communication systems. There are two main types - tight buffered cables for indoor use, with multiple tight buffered fibers packed together, and loose tube cables for outdoor use, with bare fibers placed loosely inside buffer tubes. Cables include strength members, moisture blocking gel, and jackets made of materials like polyethylene, PVC or aramid yarn to protect the fibers from stresses during installation and harsh environments.
This document certifies that a group of 5 students from Shankar Narayan College completed a case study on data communication cables for their semester 2 course in 2012-2013. It provides the names of the students and signatures from their lecturer and head of department, confirming the students satisfactorily completed the required work.
The authors survey the emerging IEEE 802.20 standard, also known as Mobile Broadband Wireless Access (MBWA). They provide an introduction to the activities with regard to this standard, including its purpose and scope. The IEEE 802.20 will fill the gap between cellular networks (low bandwidth and high mobility) and other IEEE 802 wireless networks (high bandwidth and low mobility) currently in use. It will provide seamless integration between different domains, allowing users to have a single connection for their networking needs wherever they go.
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.
Loose tube cables can be either dielectric or optionally armored. The loose-tube design helps in the identification and administration of fibers in the system.
The Eigenfrequency Analysis of Mems Based Baw Resonatoriosrjce
As technology is growing very rapidly, Micro scale devices are playing a vital role in the electronic,
mechanical and other application areas due to their integrability with CMOS IC technology, low power
consumption, low cost Fabrication and Large frequency-Quality factor product. As there is a much demand for
small and portable devices the applications of micro devices like MEMS based Bulk Acoustic Wave (BAW)
resonators are rapidly increasing. In this paper we will present the analysis of thin-film BAW resonator
designed in 2D using eigenfrequency by using Zinc oxide and Lead Zirconate Titanate (PZT-8) materials and
try to achieve a high quality ( Q) factor . The Q-factor is the most important characteristics of a resonator
because it describes the frequency selectivity of the device. The high Q-factor greatly helps to implement
extremely selective IF and RF filters with small percent bandwidth and low insertion loss
This document provides a brief review of recent works on various wireless networks and their integration. It first discusses different types of wireless networks including WLAN, WiMAX, satellites, and ad hoc networks. It then reviews recent studies on improving aspects of these individual networks such as MAC layer protocols, security, and frequency synthesizers. Finally, it summarizes research on integrating combinations of wireless networks like WLAN and WiMAX to improve quality of service, as well as integrating satellite networks to provide emergency communication or solve line of sight problems.
Optical fiber connectors are used to join optical fibers where connections need to be made and undone. There are several types of optical fiber connectors that are commonly used, including SC, ST, FC, LC, MT-RJ, MU, and SMA connectors. The document discusses the key features and applications of each connector type. SC and LC connectors are now most widely used due to their low cost and ease of use. Proper connector selection depends on the application and fiber type (multimode or singlemode).
This document evaluates Wi-Fi network performance in indoor environments under different conditions. It measures parameters like throughput, latency, and packet loss for both line-of-sight and non-line-of-sight scenarios at distances of 10, 20, and 12 meters. The results show that throughput decreases and latency increases with distance, and non-line-of-sight conditions yield lower throughput than line-of-sight. Packet loss is also higher with increased distance and non-line-of-sight obstacles between the transmitter and receiver.
This document discusses fiber to the home (FTTH) technology and implementation methods. It provides an overview of fiber optics, including the components and construction of fiber optic cable. Fiber offers huge bandwidth through a single fiber carrying data, voice, video and other services. While FTTH provides benefits over copper networks like higher reliability and capacity for future bandwidth growth, deployment costs tend to be high due to new infrastructure requirements. The document aims to standardize FTTH planning and implementation methods to reduce costs.
—Fiber Optics and Copper wires are the two
prominent communication links used in modern
communication and play a great role. A lot of articles have
been written comparing these two technologies. Each of this
communication links has its own advantages and disadvantages
over the other. In this paper, both fiber optics and copper are
evaluated and compared regarding their advantages and
disadvantages based on bandwidth, cost, weight, size and
flexibility, signal loss, information capacity, safety and
immunity .In today’s modern-world communication demand,
having an understanding of how these interconnects and
interfaces devices is critical to successful system design.
This document is a dissertation submitted by A. Linga Reddy and E. Vikram in partial fulfillment of the requirements for a Bachelor of Technology degree in Electronics and Communication Engineering. It discusses the emerging wireless technology known as GI-FI (Gigabit Fidelity), which allows for wireless transfer of data at speeds up to 5 gigabits per second over short ranges of about 10 meters, using integrated transceivers operating at 60GHz. This new technology promises wireless connectivity in homes and offices without wires and at a lower cost than existing technologies such as Wi-Fi.
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.
Design and optimize microstrip patch antenna array using the active element p...journalBEEI
Microstrip patch antennas are widely used in modern day communication devices due to their light weight, low cost and ease of fabrication. In this paper, we have designed and fabricated two Microstrip Patch Antennas (slotted-ring and truncated-slotted ring) and array at 2.4 GHz for Wireless Local Area Network (WLAN) applications using Computer Simulation Technology, CST. The antenna design consists of rectangular radiating patch on Rogers RT5880 substrate and is excited by using coaxial probe feeding technique. The truncated-slotted ring has been designed on top of the radiating patch to improve bandwidth. The simulation and measurement results of the both antennas are in close agreement with each other. Due to the good agreement of simulation and measurement results of truncated-slotted ring antenna in comparison with slotted-ring antenna, it has been selected for antenna array design. The simulated and measured S11 of truncated-slotted ring antenna shows -21dB and -15.6 dB at 2.4 GHz respectively. Then, the antenna has been formed into 1x4 array in order to observe its beamforming capability. The proposed antenna array is suitable for 802.11b/g/n Wi-Fi standard which is proposed to be used for IoT.
This document outlines a research project investigating the effects of ISM band interferers on Wi-Fi networks. The project will analyze how devices like microwave ovens, Bluetooth, and cordless phones can degrade Wi-Fi performance and increase errors. An experimental setup will use an Air Magnet Enterprise system to test the impact of these interferers on a Wi-Fi network and evaluate different shielding materials for attenuating microwave oven leakage power. The research aims to contribute knowledge on how ISM band interference affects Wi-Fi and potential approaches for mitigating problems in the future.
CHARACTERIZATION OF INDOOR PROPAGATION PROPERTIES AND PERFORMANCE EVALUATION ...ijwmn
Indoor wireless systems poses one of the biggest design challenges although it is the most flexible and easily
deployable method of implementing Local Area Networks. This difficulty in predicting the propagation of
radio frequency wave in indoor environments is caused by reflection, refraction, diffraction and scattering
of signals due to closed proximities to furniture, walls, human beings, and reflectors like ceiling, mirrors and
glasses. To help improve the user experience and guarantee good quality of service in indoor situations, the
research investigated the throughput and attenuation effect on signal with respect to 4, 5, 6 and 9 inches sizes
of blocks walls respectively. The characterized Path-loss exponent was 1.999 and differed from the f
High frequency of low noise amplifier architecture for WiMAX application: A r...IJECEIAES
The low noise amplifier (LNA) circuit is exceptionally imperative as it promotes and initializes general execution performance and quality of the mobile communication system. LNA's design in radio frequency (R.F.) circuit requires the trade-off numerous imperative features' including gain, noise figure (N.F.), bandwidth, stability, sensitivity, power consumption, and complexity. Improvements to the LNA's overall performance should be made to fulfil the worldwide interoperability for microwave access (WiMAX) specifications' prerequisites. The development of front-end receiver, particularly the LNA, is genuinely pivotal for long-distance communications up to 50 km for a particular system with particular requirements. The LNA architecture has recently been designed to concentrate on a single transistor, cascode, or cascade constrained in gain, bandwidth, and noise figure.
This document summarizes a student project on wireless network security. It provides an overview of IEEE 802.11 wireless networking standards including 802.11a, b, g, and n. It describes early security methods like WEP and its vulnerabilities. It then explains improved security standards like 802.11i and WPA/WPA2 that aimed to address weaknesses in WEP. The document also briefly discusses the Bluetooth standard and security methods like device pairing.
WiMAX has the potential to replace existing telecommunications infrastructure by providing broadband internet, phone, and TV services without the need for cables. It can offer these services to both fixed locations and mobile users. WiMAX works by transmitting data between base stations and customer equipment over the air. The key components are radios at the base stations and customer locations, along with antennas to transmit and receive the wireless signals. WiMAX provides faster speeds and wider coverage than existing wireless technologies like WiFi, and allows for converged voice, data, and video services.
This document summarizes a study that designed an integrated WiFi/WiMAX network using the QUALNET simulator. WiFi provides high data rates but short range, while WiMAX has lower data rates but much longer range. The study developed a coupler device that can receive WiMAX signals and convert them to WiFi, allowing seamless connectivity across both networks. This provides continuous coverage for users in high-rise buildings that may be outside WiFi range. The integrated network was analyzed in QUALNET and was found to provide high throughput, low delay, and consistent performance.
This document summarizes a study that designed an integrated WiFi/WiMAX network using the QUALNET 5.0.1 simulator. The study aimed to provide seamless connectivity for subscribers across different network types. It provides an overview of WiFi and WiMAX technologies and their complementary characteristics. The designed system model includes a WiFi/WiMAX interworking module that converts between the different network signals to allow coupling and handover between WiFi and WiMAX networks. The study analyzed the integrated network's performance in terms of throughput, delay, and jitter.
Analysis of wifi and wimax and wireless network coexistenceIJCNCJournal
Wireless networks are very popular nowadays. Wireless Local Area Network (WLAN) that uses the IEEE 802.11 standard and WiMAX (Worldwide Interoperability for Microwave Access) that uses the IEEE802.16 standard are networks that we want to explore. WiMAX has been developed over 10 years, but it is still unknown by most people. However, compared with WLAN, it has many advantages in transmission speed and coverage area. This paper will introduce these two technologies and make comparisons between WiMAX and WiFi. In addition, wireless network coexistence of WLAN and WiMAX will be explored through simulation. Lastly we want to discuss the future of WiMAX in relation to WiFi.
Fiber optic cable packages optical fibers in a protective structure for installation and use in communication systems. There are two main types - tight buffered cables for indoor use, with multiple tight buffered fibers packed together, and loose tube cables for outdoor use, with bare fibers placed loosely inside buffer tubes. Cables include strength members, moisture blocking gel, and jackets made of materials like polyethylene, PVC or aramid yarn to protect the fibers from stresses during installation and harsh environments.
This document certifies that a group of 5 students from Shankar Narayan College completed a case study on data communication cables for their semester 2 course in 2012-2013. It provides the names of the students and signatures from their lecturer and head of department, confirming the students satisfactorily completed the required work.
The authors survey the emerging IEEE 802.20 standard, also known as Mobile Broadband Wireless Access (MBWA). They provide an introduction to the activities with regard to this standard, including its purpose and scope. The IEEE 802.20 will fill the gap between cellular networks (low bandwidth and high mobility) and other IEEE 802 wireless networks (high bandwidth and low mobility) currently in use. It will provide seamless integration between different domains, allowing users to have a single connection for their networking needs wherever they go.
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.
Loose tube cables can be either dielectric or optionally armored. The loose-tube design helps in the identification and administration of fibers in the system.
The Eigenfrequency Analysis of Mems Based Baw Resonatoriosrjce
As technology is growing very rapidly, Micro scale devices are playing a vital role in the electronic,
mechanical and other application areas due to their integrability with CMOS IC technology, low power
consumption, low cost Fabrication and Large frequency-Quality factor product. As there is a much demand for
small and portable devices the applications of micro devices like MEMS based Bulk Acoustic Wave (BAW)
resonators are rapidly increasing. In this paper we will present the analysis of thin-film BAW resonator
designed in 2D using eigenfrequency by using Zinc oxide and Lead Zirconate Titanate (PZT-8) materials and
try to achieve a high quality ( Q) factor . The Q-factor is the most important characteristics of a resonator
because it describes the frequency selectivity of the device. The high Q-factor greatly helps to implement
extremely selective IF and RF filters with small percent bandwidth and low insertion loss
This document provides a brief review of recent works on various wireless networks and their integration. It first discusses different types of wireless networks including WLAN, WiMAX, satellites, and ad hoc networks. It then reviews recent studies on improving aspects of these individual networks such as MAC layer protocols, security, and frequency synthesizers. Finally, it summarizes research on integrating combinations of wireless networks like WLAN and WiMAX to improve quality of service, as well as integrating satellite networks to provide emergency communication or solve line of sight problems.
Optical fiber connectors are used to join optical fibers where connections need to be made and undone. There are several types of optical fiber connectors that are commonly used, including SC, ST, FC, LC, MT-RJ, MU, and SMA connectors. The document discusses the key features and applications of each connector type. SC and LC connectors are now most widely used due to their low cost and ease of use. Proper connector selection depends on the application and fiber type (multimode or singlemode).
This document evaluates Wi-Fi network performance in indoor environments under different conditions. It measures parameters like throughput, latency, and packet loss for both line-of-sight and non-line-of-sight scenarios at distances of 10, 20, and 12 meters. The results show that throughput decreases and latency increases with distance, and non-line-of-sight conditions yield lower throughput than line-of-sight. Packet loss is also higher with increased distance and non-line-of-sight obstacles between the transmitter and receiver.
This document discusses fiber to the home (FTTH) technology and implementation methods. It provides an overview of fiber optics, including the components and construction of fiber optic cable. Fiber offers huge bandwidth through a single fiber carrying data, voice, video and other services. While FTTH provides benefits over copper networks like higher reliability and capacity for future bandwidth growth, deployment costs tend to be high due to new infrastructure requirements. The document aims to standardize FTTH planning and implementation methods to reduce costs.
—Fiber Optics and Copper wires are the two
prominent communication links used in modern
communication and play a great role. A lot of articles have
been written comparing these two technologies. Each of this
communication links has its own advantages and disadvantages
over the other. In this paper, both fiber optics and copper are
evaluated and compared regarding their advantages and
disadvantages based on bandwidth, cost, weight, size and
flexibility, signal loss, information capacity, safety and
immunity .In today’s modern-world communication demand,
having an understanding of how these interconnects and
interfaces devices is critical to successful system design.
This document is a dissertation submitted by A. Linga Reddy and E. Vikram in partial fulfillment of the requirements for a Bachelor of Technology degree in Electronics and Communication Engineering. It discusses the emerging wireless technology known as GI-FI (Gigabit Fidelity), which allows for wireless transfer of data at speeds up to 5 gigabits per second over short ranges of about 10 meters, using integrated transceivers operating at 60GHz. This new technology promises wireless connectivity in homes and offices without wires and at a lower cost than existing technologies such as Wi-Fi.
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.
Design and optimize microstrip patch antenna array using the active element p...journalBEEI
Microstrip patch antennas are widely used in modern day communication devices due to their light weight, low cost and ease of fabrication. In this paper, we have designed and fabricated two Microstrip Patch Antennas (slotted-ring and truncated-slotted ring) and array at 2.4 GHz for Wireless Local Area Network (WLAN) applications using Computer Simulation Technology, CST. The antenna design consists of rectangular radiating patch on Rogers RT5880 substrate and is excited by using coaxial probe feeding technique. The truncated-slotted ring has been designed on top of the radiating patch to improve bandwidth. The simulation and measurement results of the both antennas are in close agreement with each other. Due to the good agreement of simulation and measurement results of truncated-slotted ring antenna in comparison with slotted-ring antenna, it has been selected for antenna array design. The simulated and measured S11 of truncated-slotted ring antenna shows -21dB and -15.6 dB at 2.4 GHz respectively. Then, the antenna has been formed into 1x4 array in order to observe its beamforming capability. The proposed antenna array is suitable for 802.11b/g/n Wi-Fi standard which is proposed to be used for IoT.
This document outlines a research project investigating the effects of ISM band interferers on Wi-Fi networks. The project will analyze how devices like microwave ovens, Bluetooth, and cordless phones can degrade Wi-Fi performance and increase errors. An experimental setup will use an Air Magnet Enterprise system to test the impact of these interferers on a Wi-Fi network and evaluate different shielding materials for attenuating microwave oven leakage power. The research aims to contribute knowledge on how ISM band interference affects Wi-Fi and potential approaches for mitigating problems in the future.
CHARACTERIZATION OF INDOOR PROPAGATION PROPERTIES AND PERFORMANCE EVALUATION ...ijwmn
Indoor wireless systems poses one of the biggest design challenges although it is the most flexible and easily
deployable method of implementing Local Area Networks. This difficulty in predicting the propagation of
radio frequency wave in indoor environments is caused by reflection, refraction, diffraction and scattering
of signals due to closed proximities to furniture, walls, human beings, and reflectors like ceiling, mirrors and
glasses. To help improve the user experience and guarantee good quality of service in indoor situations, the
research investigated the throughput and attenuation effect on signal with respect to 4, 5, 6 and 9 inches sizes
of blocks walls respectively. The characterized Path-loss exponent was 1.999 and differed from the f
High frequency of low noise amplifier architecture for WiMAX application: A r...IJECEIAES
The low noise amplifier (LNA) circuit is exceptionally imperative as it promotes and initializes general execution performance and quality of the mobile communication system. LNA's design in radio frequency (R.F.) circuit requires the trade-off numerous imperative features' including gain, noise figure (N.F.), bandwidth, stability, sensitivity, power consumption, and complexity. Improvements to the LNA's overall performance should be made to fulfil the worldwide interoperability for microwave access (WiMAX) specifications' prerequisites. The development of front-end receiver, particularly the LNA, is genuinely pivotal for long-distance communications up to 50 km for a particular system with particular requirements. The LNA architecture has recently been designed to concentrate on a single transistor, cascode, or cascade constrained in gain, bandwidth, and noise figure.
This document summarizes a student project on wireless network security. It provides an overview of IEEE 802.11 wireless networking standards including 802.11a, b, g, and n. It describes early security methods like WEP and its vulnerabilities. It then explains improved security standards like 802.11i and WPA/WPA2 that aimed to address weaknesses in WEP. The document also briefly discusses the Bluetooth standard and security methods like device pairing.
WiMAX has the potential to replace existing telecommunications infrastructure by providing broadband internet, phone, and TV services without the need for cables. It can offer these services to both fixed locations and mobile users. WiMAX works by transmitting data between base stations and customer equipment over the air. The key components are radios at the base stations and customer locations, along with antennas to transmit and receive the wireless signals. WiMAX provides faster speeds and wider coverage than existing wireless technologies like WiFi, and allows for converged voice, data, and video services.
This document summarizes a study that designed an integrated WiFi/WiMAX network using the QUALNET simulator. WiFi provides high data rates but short range, while WiMAX has lower data rates but much longer range. The study developed a coupler device that can receive WiMAX signals and convert them to WiFi, allowing seamless connectivity across both networks. This provides continuous coverage for users in high-rise buildings that may be outside WiFi range. The integrated network was analyzed in QUALNET and was found to provide high throughput, low delay, and consistent performance.
This document summarizes a study that designed an integrated WiFi/WiMAX network using the QUALNET 5.0.1 simulator. The study aimed to provide seamless connectivity for subscribers across different network types. It provides an overview of WiFi and WiMAX technologies and their complementary characteristics. The designed system model includes a WiFi/WiMAX interworking module that converts between the different network signals to allow coupling and handover between WiFi and WiMAX networks. The study analyzed the integrated network's performance in terms of throughput, delay, and jitter.
This document discusses various applications of fiber optic cable networks including:
1. Fiber To The Home networks which provide voice, video, and data services over a single fiber using different wavelengths of light. Popular FTTH network types include BPON, EPON, and GPON.
2. Metropolitan telecom networks which connect local area networks across a region and require high-speed connections best provided by fiber optic cables.
3. Long distance telecom networks which transmit telephone, internet, and television signals between cities using a backbone of fiber optic cables laid underground and underwater.
This document compares the IEEE 802.11a, b, g, n, and ac wireless networking standards. It discusses the key features of each standard such as operating frequency, data rates, and range. The 802.11ac standard provides the best performance with wide channel bandwidths up to 160MHz, high data rates up to 8.6 Gbps, and support for up to 8 antennas. It has greater coverage than previous standards and less interference due to operating in the 5GHz frequency band. The document concludes that 802.11ac enhances wireless networking quality and performance compared to earlier 802.11 standards.
Conceptual Design of LiFi Audio Transmission Using Pre-Programmed ModulesAuwal Amshi
We design a concept of Li-fi audio signal transmission by reusing and repurposing pre-programmed modules to simplify and discuss visible light communication (VLC) in other to give a new researcher the idea on how the concept of LiFi and VLC.
This document outlines a research project investigating the effects of ISM band interferers on Wi-Fi network performance. The project will evaluate Wi-Fi performance with two microwave ovens, a cordless phone, and Bluetooth device operating nearby. It will also analyze the attenuation of microwave oven leakage power using different shielding materials. The research aims to quantify how these common devices interfere with Wi-Fi and identify approaches to mitigate interference. Experimental data will be collected using an Air Magnet enterprise console system in a controlled setup. The results will provide insight into managing interference to improve wireless LAN communications.
WiMAX has the potential to replace existing telecommunications infrastructure by providing broadband internet, phone, and TV services without the need for cables. It can do this through either fixed wireless or mobile configurations. WiMAX uses radio signals to transmit data between a base station and customer equipment up to 6 miles away, delivering speeds of around 40 Mbps. Key benefits of WiMAX include its ability to provide broadband connectivity to both businesses and homes from a single base station. Objections around interference, quality of service, security and reliability for wireless technologies are addressed through features in the WiMAX protocol like adaptive antenna systems and dynamic frequency selection.
IRJET- Different Technique over 5G LTE Wireless Network: A SurveyIRJET Journal
This document discusses different techniques for 5G LTE wireless networks. It provides an overview of the evolution of wireless communication technologies from 1G to 5G. 5G networks are expected to provide higher data rates of 1Gbps or more compared to 4G networks. The document also discusses the architecture and working of 5G networks, including using massive MIMO technology to establish indoor and outdoor setups to reduce infiltration losses through building walls. This will help improve energy efficiency, cell throughput, data rates, and spectral efficiency of cellular networks.
This document discusses fiber optic communication systems. It begins by introducing fiber optics as a major component of telecommunication infrastructure due to its high bandwidth capabilities and low signal attenuation. It then covers the basic building blocks of a fiber optic system including light sources, detectors, couplers and multiplexers. The document discusses the advantages of fiber optic systems such as long signal transmission distances, large bandwidth and small cable size. It also covers transmission windows, loss calculations and provides examples. In summary, the document provides an overview of the key concepts and components of fiber optic communication systems.
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algorithm.
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Climate change's impact on the planet forced the United Nations and governments to promote green energies and electric transportation. The deployments of photovoltaic (PV) and electric vehicle (EV) systems gained stronger momentum due to their numerous advantages over fossil fuel types. The advantages go beyond sustainability to reach financial support and stability. The work in this paper introduces the hybrid system between PV and EV to support industrial and commercial plants. This paper covers the theoretical framework of the proposed hybrid system including the required equation to complete the cost analysis when PV and EV are present. In addition, the proposed design diagram which sets the priorities and requirements of the system is presented. The proposed approach allows setup to advance their power stability, especially during power outages. The presented information supports researchers and plant owners to complete the necessary analysis while promoting the deployment of clean energy. The result of a case study that represents a dairy milk farmer supports the theoretical works and highlights its advanced benefits to existing plants. The short return on investment of the proposed approach supports the paper's novelty approach for the sustainable electrical system. In addition, the proposed system allows for an isolated power setup without the need for a transmission line which enhances the safety of the electrical network
Redefining brain tumor segmentation: a cutting-edge convolutional neural netw...IJECEIAES
Medical image analysis has witnessed significant advancements with deep learning techniques. In the domain of brain tumor segmentation, the ability to
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for future exploration and optimization of advanced CNN models in medical
imaging, emphasizing addressing false positives and resource efficiency.
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265
c. Home automation services using internet connections [11].
Meanwhile, materials used in buildings mostly absorb WiFi signal that make the access point
placement inefficient as the transmitted signal blocked, absorbed, dispersed or reflected back by the wall and
building structures. Isolative materials, such as concrete absorb and disperse the WiFi signal, while
conductive materials such as metal reflect WiFi signal. The characteristics of those materials are
approximated by using conductivity and complex permittivity parameter. The more conductive materials, the
more reflective to radio signals. The more permittive a material, the more absorbing to radio signals. Table 1
shows the examples of permittivity and conductivity of some materials exist on buildings.
Table 1. Permittivity and Conductivity of Some Material [12]
Material. Relative Permittivity Conductivity (S/m) Frequency (GHz)
Concrete 5.31 0.0326 1-100
Brick 3.75 0.038 1-10
Plaster board 2.94 0.0116 1-100
Wood 1.99 0.0047 0.001-100
Glass 6.27 0.0043 0.1-100
Ceiling board 1.50 0.0005 1-100
Metal 1 10 1-100
Indoor propagations as the main problems for WiFi networks have been studied and modeled in
some mathematical expressions. Deterministic model relies only on mathematical expressions, such as free
space loss model, log distance path loss model, and log normal shadowing model. A more sophisticated
model uses a complex approach such as impulse response [13] and statistic dispersion [14]. The modeling is
performed only for a specific frequency band.
This paper introduces the term of WiFi-friendly building by reminding that the building structure is
the major challenge on indoor signal propagation, mainly about signal losses caused by the obstacles. This
paper also introduces that the properties within the buildings may assist signal spreadings so that building is
friendlier to WiFi signal. At the end of this paper, a simple though-hole application on the wall is examined
to increase WiFi signal in other wall side.
2. RESEARCH METHOD
In order to introduce the needs of WiFi-friendly building, research methods are designed to show
that:
a. obstacles reduce WiFi signal
b. reflector on certain positions increases the received signal
c. reflector can be inserted in building properties or ornaments
d. A small hole-in-the-wall structure may reduce the impact of signal blocking.
2.1. The Obstacle Impact
In order to show the obstacle impact to WiFi signal propagation, a measurement device is
assemblied by using ESP8266. ESP8266 is a system on a chip (SOC) integrated circuit that can work as an
access point as well as a client of the 802.11 network. ESP8266 can work either with microcontroller or stand
alone. In order to examine the impact of obstacle to WiFi signal, an experiement is set up as shown in Figure
1a. Figure 1b is for assessing the impact of the reflector on the received signal.
(a) Obstacle experiment (b) Reflector Experiment
Figure 1. Experiment set up for obstacle and reflector impact
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266
A smart phone is turned on to broadcast WiFi signal that will be blocked by an obstacle, separated
by 2.5 m to 15 m from a smart phone and 20 cm from the receiver. WEMOS D1 ESP8266-E12 is applied as a
WiFi signal receptor. Obstacles are made of concrete, wood and metal, while reflector is metal. Samples of
the obstacles are shown in Figure 2.
(a) Concrete (b) Metal (c) Wood
Figure 2. Sample of the obstacle materials
2.2. An Ornament-attaced Reflector
Properties within the building such as painting, foto frames and statue can be used as signal
spreaders, rather than obstacles. As an example, this paper utilizes a painting frame mounted in the wall as
the reflector. An aluminium sheet is attached behind the painting. This ornament-attached reflector is
employed to increase WiFi signal on the second floor. The access point is placed on the first floor. Figure 3
shows the sketch of the experiment. There are three points for the reflector positioning: position 1, position 2
and position 3.
Figure 3. Sample of the obstacle materials
2.3. A hole-in-the-wall Structure
Building wall is the main obstacle within the building. Some rooms are isolated from WiFi signal as
there is no way signal getting trhough. In this case, a hole-in-the-wall structure is designed to help signal
passing through the wall. Figure 4 shows the designed structure.
Figure 4. A hole-in-the-wall structure
4. BEEI ISSN: 2302-9285
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The hole is made of an aluminium tube with diameter d and length l, attached to two aluminium
sheets. This structure is embedded to the wall so that concrete filled the area between the two aluminium
sheets. The hole is expected to pass WiFi signal. An experiment is set to measure the impact of the hole-in-
the-wall structure as shown in Figure 5.
Figure 5. A hole-in-the-wall experiment
3. RESULTS AND ANALYSIS
3.1. Obstacle Impact to WiFi Signal
The results of experiment on Figure 1 are shown in Figure 6. Data shown in Figure 6 is based on the
average of 30 times measurements. The average signal level decreases as distance between transmitter and
receiver increases. The concrete obstacle absorbs signal the most which lead to the average received signal
level of - 66.27 dBm. Metal is following by producing received signal level of -64.23 dBm. Wood is the less
absorbing material, the average received signal is - 58.9 dBm.
Figure 6. Signal reductions due to propagation and obstacles
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3.2. Reflector Impact to WiFi Signal
A metal reflector placement as depicted in Figure 1b has been successfully reduce the signal
absorption and increase received signal level. Signal level increases 1.14 dBm in average. The received
signal for concrete obstacle is -64.74 dBm, metal obstacle is -63.27 dBm and wood obstacle is -58.17 dBm.
The plots are also shown in Figure 6.
3.3. Impact of Ornament-attached Reflector
Figure 7 shows the exact locations of the ornament-attached reflector and the results are plotted in
Figure 8.
Position 1 Position 2
Position 3
Figure 7. Reflector position
The concrete wall blocks the received signal on the second floor. The only way signal gets through
is by reflection through the door. Without additional reflector, the average received signal on the second floor
is -68.69 dBm. By transforming the painting frame on the wall to be a reflector causes increments of received
signals. There are 4.03 dBm increments in average. Reflector in position 1 increases 3.39 dBm, position 2
increases 6.56 dBm and position 3 increases 2.14 dBm. Position 2 results the best increment. These
increments are plotted in Figure 8.
Figure 8.Signal reductions due to propagation and obstacle
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WiFi-Friendly Building to Enable WiFi Signal Indoor (Suherman)
269
The increment on received signal can be approximated by using the propagation model, for instant,
the ITU-R model, where the losses occurred between the access point and the receiver can be calculated
directly by using Equation 1, with d be distance, n is number of floor and Lf is losses factor, and Lf is floor
losses [12].
𝐿𝐼𝑇𝑈−𝑅 = 20𝑙𝑜𝑔10𝑓 + 𝑁. 𝑙𝑜𝑔10𝑑 + 𝐿𝑓(𝑛) − 28 (1)
If the transmitted power of access point known, then the effective isotropic radiated power (EIRP)
is:
𝐸𝐼𝑅𝑃 =𝑝𝑜𝑤𝑒𝑟 𝑡𝑟𝑎𝑛𝑠𝑚𝑖𝑡𝑡𝑒𝑑 (𝐴𝑃)–𝑐𝑎𝑏𝑙𝑒 𝑙𝑜𝑠𝑠 +𝐺𝑇𝑥 (2)
And the received signal strength indication (RSSI) in receiver is:
𝑅𝑆𝑆𝐼no-reflector =𝐸𝐼𝑅𝑃 –𝑝𝑎𝑡ℎ 𝑙𝑜𝑠𝑠 +𝐺𝑅𝑥 − 𝐿𝑅𝑥 (3)
This RSSI no-reflector is the received power without reflector. In order to calculated the RSSI with-reflector
the power increment should be calculated by considering losses from transmitter to reflector. The losses as
the link is direct can be calculated using free space loss formula:
𝐿𝐹𝑆𝐿 = 20𝑙𝑜𝑔10𝑓 + 𝑁. 𝑙𝑜𝑔10𝑑 + 92.45 (4)
The reflected power, 𝑃0
𝑟
is calculated by using the following formula
𝑃0
𝑟
= Γ. 𝑃0
𝐼
(5)
Since the first medium is air and the second one is aluminium, then:
𝑛1 = √
𝜇1
𝜖1
= √
1,26×10−6
8,85×10−12 = 126,83
𝑛2 = √
𝜇2
𝜖2
= √
1,256×10−6
1,115×10−9 = 33,56
Γ =
𝐸0
𝑟
𝐸0
𝐼 =
𝑃0
𝑟
𝑃0
𝐼 =
𝑛1+𝑛2
𝑛1−𝑛2
= 1,71
If it is assumed that the reflected power directed to the receiver, then the power increment or
RSSIincrement is:
RSSIincrement = Prec=𝑃0
𝐼
-Lossref-rec (6)
the total received power with reflector is:
𝑅𝑆𝑆𝐼with-reflector = 𝑅𝑆𝑆𝐼no-reflector+ 𝑅𝑆𝑆𝐼increment (7)
The 𝑅𝑆𝑆𝐼with-reflector may vary depending on the reflected power by the reflector. 𝑅𝑆𝑆𝐼with-reflector could
be smaller than 𝑅𝑆𝑆𝐼no-reflector if reflection causes the opposite phase signal.
3.4. Impact of the Hole-in-the-wall Structure
Figure 5 shows the exact locations of the ornament-attached reflector and the results are plotted in
Figure 9. The hole-in-the-wall structure is able to improve signal level about 2.3 dBm in average.
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270
Figure 9. Impact of the hole-in-the-wall structure
When radio signal propagates through a small hole, the transmitted signal combined with the
induced surface signal diffracted toward the hole as shown in Figure 10. This is occurred if the hole is sub
wavelength or much smaller then λ [15].
Figure 10. Small hole signal diffraction [15]
The forwarded signal power is [15]:
𝑃0
𝑜
=
64
27𝜋
𝑘4
𝑎6
𝑆𝑖 (8)
Where a is radius of the hole, k is propagation parameter (2*π/λ) and Si is the flux given by:
𝑆𝑖 = 0.5 𝑐 ∈0 𝐸𝑖
2
(9)
Since the hole-in-the-wall structure is isolated by the concrete and the hole is not smaller then λ,
then output electric field transmitted through the hole is not E0=Et+Esi [13], but E0= Esi. In order to increase
higher signal level, size of l in Figure 4 should be as thin as possible. But it will reduce the objective of the
wall exists for.
4. CONCLUSION
This paper has introduced the WiFi-friendly building idea that enables the 802.11 signal propagating
indoor efficiently. The study has proven concrete materials that dominate the building materials absorb WiFi
signal the most. However, reflectors in certain positions are able to increase WiFi signal. For instance,
ornament-attached reflector is able to improve WiFi signal up to 6.56 dBm. Further, a small hole-in-the-wall
structure within the wall is able to increase signal in other side by 2.3 dBm in average.
8. BEEI ISSN: 2302-9285
WiFi-Friendly Building to Enable WiFi Signal Indoor (Suherman)
271
By transforming the building properties as well as building structure, WiFi signal indoor can be
boosted in certain level. Future works may explore more on building properties that may help its friendliness
to WiFi signal.
ACKNOWLEDGEMENT
This research has been supported and funded by Applied TALENTA Research Grant of Universitas
Sumatera Utara, 2017.
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