scholarly journals Relative Analysis of Channel Fading Models in Wireless Networks

2019 ◽  
Vol 8 (9S3) ◽  
pp. 871-874
Keyword(s):  
Wireless Networks ◽  
Rayleigh Fading ◽  
Channel Fading ◽  
Portable Radio ◽  
Scale Models ◽  
Relative Analysis

With a specific end goal to enhance and test the framework's viability to oppose blurring, we fundamentally need to display and simulate the correspondence situation under some blurring channel for outlining of a correspondence framework. The trademark of blurring channel is various and complex for various engendering conditions. Accordingly, suitable blurring model for a specific correspondence situation is basic in such manner. Rayleigh blurring and Ricean blurring models are the most commonly utilized little scale models in remote correspondence till date. However, after the appearance of portable radio correspondence, the plan of a situation has been changed to actualize portability of transmitter or beneficiary. Along these lines we have to change the blurring model also. This paper thinks about various blurring models-Rayleigh blurring, Rice a blurring and quick Rayleigh blurring utilizing. The re-enactment comes about demonstrate that Fast Rayleigh Fading model is most appropriate for versatile radio situations which endure thick blurring

scholarly journals Relative Assessment of Channel Fading Models in Wireless Networks

2019 ◽  
Vol 8 (9S3) ◽  
pp. 755-757
Keyword(s):  
Wireless Networks ◽  
Rayleigh Fading ◽  
Channel Fading ◽  
Scale Models ◽  
Game Plan

With a specific extreme target to update and test the structure's possibility to negate clouding, we basically need to appear and reenact the correspondence condition under some darkening channel for plotting of a correspondence framework. The trademark of clouding channel is extraordinary and complex for various causing conditions. As necessities be, sensible darkening model for a specific correspondence situation is basic in such way. Rayleigh darkening and Ricean clouding models are the most routinely utilized little scale models in remote correspondence till date. In any case, after the nearness of helpful radio correspondence, the game plan of a situation has been changed to finish convenientce of transmitter or beneficiary. Hence we have to change the darkening model as well. This paper considers diverse darkening models-Rayleigh clouding, Rice a darkening and smart Rayleigh darkening utilizing. The re-authorizing happens as expected show that Fast Rayleigh Fading model is most legitimate for adaptable radio conditions which continue on through thick clouding.

scholarly journals MIMO Self-Encoded Spread Spectrum with Iterative Detection over Rayleigh Fading Channels

2010 ◽  
Vol 2010 ◽  
pp. 1-9 ◽  
Author(s):  
Shichuan Ma ◽  
Lim Nguyen ◽  
Won Mee Jang ◽  
Yaoqing (Lamar) Yang
Keyword(s):  
Fading Channels ◽  
Spread Spectrum ◽  
Rayleigh Fading ◽  
Mimo Systems ◽  
Signal To Noise Ratio ◽  
Multiple Input Multiple Output ◽  
Spatial Diversity ◽  
Iterative Detection ◽  
Channel Fading ◽  
Input Multiple Output

Self-encoded spread spectrum (SESS) is a novel communication technique that derives its spreading code from the randomness of the source stream rather than using conventional pseudorandom noise (PN) code. In this paper, we propose to incorporate SESS in multiple-input multiple-output (MIMO) systems as a means to combat against fading effects in wireless channels. Orthogonal space-time block-coded MIMO technique is employed to achieve spatial diversity, and the inherent temporal diversity in SESS modulation is exploited with iterative detection. Simulation results demonstrate that MIMO-SESS can effectively mitigate the channel fading effect such that the system can achieve a bit error rate of with very low signal-to-noise ratio, from 3.3 dB for a antenna configuration to just less than 0 dB for a configuration under Rayleigh fading. The performance improvement for the case is as much as 6.7 dB when compared to an MIMO PN-coded spread spectrum system.

scholarly journals Shortest Link Scheduling in Wireless Networks Under The Rayleigh Fading Model

2021 ◽  
Author(s):  
Baogui Huang ◽  
Jiguo Yu ◽  
Chunmei Ma ◽  
Fengyin Li ◽  
Guangshun Li
Keyword(s):  
Wireless Networks ◽  
Rayleigh Fading ◽  
Scheduling Algorithm ◽  
Random Variable ◽  
Rayleigh Distribution ◽  
Interference Model ◽  
Link Scheduling ◽  
Signal Power ◽  
Schedule Delay ◽  
Radio Signals

Abstract Many shortest link scheduling algorithms adopt non-fading SINR interference model, which assumes that the received signal power will always remain determinate as long as the transmission power of the corresponding sender is fixed. In fact, because environment always influences the propagation of radio signals, the received signal power is by no means a certain value. Rayleigh fading is a statistical model for radio signals propagation. It assumes that the strength of a signal on a receiver is a random variable, varying with the Rayleigh distribution. This paper proposes a shortest link scheduling algorithm under the Rayleigh fading model (SLSRF). The SLSRF partitions the wireless network area into hexagons and colors the hexagons with 3 different colors such that two neighboring hexagons have different colors. The senders of the links scheduled simultaneously are arranged in hexagons with the same color. The correctness of the SLSRF is proved through theoretical analysis, and the efficiency is illustrated by elaborate simulations. Our simulation results demonstrate that the schedule delay of SLSRF is less than that of some results under the non-fading SINR interference model. Furthermore, we extend the SLSRF to a distributed version, which is suitable for large wireless networks.

scholarly journals Efficient Link Scheduling in Wireless Networks Under Rayleigh-Fading and Multiuser Interference

2020 ◽  
Vol 19 (8) ◽  
pp. 5621-5634 ◽  
Author(s):  
Jiguo Yu ◽  
Kan Yu ◽  
Dongxiao Yu ◽  
Weifeng Lv ◽  
Xiuzhen Cheng ◽  
...  
Keyword(s):  
Wireless Networks ◽  
Rayleigh Fading ◽  
Link Scheduling ◽  
Multiuser Interference
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