Impact of Arbitrary Co-Channel MIMO Modes on Alamouti Coding under Path-Loss and Rayleigh Fading

2011 ◽  
Author(s):  
Yongzhao Li ◽  
Lu Zhang ◽  
Leonard J. Cimini Jr. ◽  
Hailin Zhang
Keyword(s):  
Rayleigh Fading ◽  
Path Loss ◽  
Alamouti Coding

scholarly journals Capacity Analysis of Distributed Antenna Systems with Beamforming

2018 ◽  
Vol 232 ◽  
pp. 04039
Author(s):  
Meiyan Ju ◽  
Chao Chen ◽  
Yueheng Li ◽  
Guoping Tan
Keyword(s):  
Rayleigh Fading ◽  
Path Loss ◽  
Mathematical Expression ◽  
System Capacity ◽  
Capacity Analysis ◽  
Multiple Antenna ◽  
Distributed Antenna Systems ◽  
Multiple Antenna Systems ◽  
Distributed Antenna ◽  
Antenna Systems

Distributed antenna systems (DASs) can reduce the access distance, increase system capacity and improve system performance compared with conventional centralized multiple antenna systems. In this paper, the system capacity of downlink DAS with beamforming is investigated. The mathematical expression of system capacity is derived over the composite channel including Rayleigh fading, shadowing and path loss. At the same time, the interference from other APs is also considered for the studied AP. Numerical methods including Gauss-Hermite integral and composite Simpson’s rule are used to compute the system capacity of DAS under different MS distributions. Numerical results verify the precision of the mathematical analysis of system capacity by comparing Monte-Carlo simulation results. The results also show interference among APs shouldn’t be ignored when APs are close to each other or there are many APs.

scholarly journals An Analytical Study on Eavesdropping Attacks in Wireless Nets of Things

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Xuran Li ◽  
Hao Wang ◽  
Hong-Ning Dai ◽  
Yuanyuan Wang ◽  
Qinglin Zhao
Keyword(s):  
Internet Of Things ◽  
Rayleigh Fading ◽  
Analytical Study ◽  
Path Loss ◽  
Directional Antennas ◽  
Shadow Fading ◽  
Extensive Simulation ◽  
Simulation Results ◽  
Fading Effect ◽  
Loss Effect

The security of Internet of Things (IoT) has received extensive attention recently. This paper presents a novel analytical model to investigate the eavesdropping attacks in Wireless Net of Things (WNoT). Our model considers various channel conditions, including thepath loss, theshadow fading effect, andRayleigh fading effect. Besides, we also consider the eavesdroppers in WNoT equipped with either omnidirectional antennas or directional antennas. Extensive simulation results show that our model is accurate and effective to model the eavesdropping attacks in WNoT. Besides, our results also indicate that the probability of eavesdropping attacks heavily depends on the shadow fading effect, the path loss effect, Rayleigh fading effect, and the antenna models. In particular, we find that the shadow fading effect is beneficial to the eavesdropping attacks while both the path loss effect and Rayleigh fading effect are detrimental. Besides, using directional antennas at eavesdroppers can also increase the eavesdropping probability. Our results offer some useful implications on designing antieavesdropping schemes in WNoT.

scholarly journals On the Performance of the DNPS-Based Relay Networks under Masquerading Attack

2018 ◽  
Vol 2018 ◽  
pp. 1-13
Author(s):  
Wenson Chang
Keyword(s):  
Network Topology ◽  
Physical Layer Security ◽  
Rayleigh Fading ◽  
Cooperative Diversity ◽  
Path Loss ◽  
Relay Networks ◽  
Channel Effects ◽  
Log Normal ◽  
The Impact ◽  
Flat Rayleigh Fading

In the relay networks, two typical issues of physical layer security are selfishness and garbling. As a matter of fact, a certain nontypical but severely harmful misbehavior can also remove the cooperative diversity gain. Here, we coin the masquerading attack to indicate this kind of misbehavior. A masquerade relay can always pretend to be the best one to forward signals and, in consequence, deprive the others of the opportunities to cooperate. To the best of our knowledge, the impact of the masquerading attack has not yet been fully investigated. In this paper, multiple masquerade relays with random masquerading behavior are taken into account. Also, the complete channel effects, including the effects of the flat Rayleigh fading, log-normal shadowing, and path loss, are considered such that the geographical effects of the network topology can be completely captured. At last, the impact of the masquerade relays are evaluated in terms of the outage probability and end-to-end capacity.

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