scholarly journals Distributed Consensus Algorithms in Sensor Networks With Imperfect Communication: Link Failures and Channel Noise

2009 ◽  
Vol 57 (1) ◽  
pp. 355-369 ◽  
Author(s):  
S. Kar ◽  
J.M.F. Moura
Keyword(s):  
Sensor Networks ◽  
Channel Noise ◽  
Communication Link ◽  
Distributed Consensus ◽  
Consensus Algorithms ◽  
Link Failures

Pseudo Two-Hop Distributed Consensus Algorithm with Link Failure

2012 ◽  
Vol 591-593 ◽  
pp. 1575-1578
Author(s):  
Huan Xin Peng ◽  
Wen Kai Wang
Keyword(s):  
Time Delay ◽  
Consensus Algorithm ◽  
Communication Link ◽  
Link Failure ◽  
Network Congestion ◽  
Distributed Consensus ◽  
Link Failures ◽  
Convergence Performance ◽  
Simulation Results ◽  
Independent Identically Distributed

For time-delay, noise and network congestion in the communication among agents, there are often random communication link failures among agents. In this paper, we analyze the pseudo two-hop distributed consensus algorithm with link failures, and research the relation between convergence performance and the probability of link failures. Supposing that the probability of link failures in every link is independent identically distributed, we analyze the convergence performance of the pseudo two-hop distributed consensus algorithm with link failures, and simulation results are provided to verify these analytical results.

Impact of Pointing Error on the BER Performance of an OFDM Optical Wireless Communication Link over Turbulent Condition

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Bobby Barua ◽  
S. P. Majumder
Keyword(s):  
Noise Analysis ◽  
Data Rate ◽  
Channel Noise ◽  
Communication Link ◽  
Optical Wireless ◽  
Power Penalty ◽  
Major Power ◽  
Pointing Error ◽  
Turbulent Condition ◽  
Ber Performance

AbstractAn analytical approach is developed in this paper to evaluate the bit error rate (BER) performance of an optical wireless (OW) communication system with multiplexing of the RF orthogonal frequency division (OFDM) over turbulent condition taking into account the effect of pointing error. The received signal is detected through direct detection receiver followed by RF synchronous demodulation including the effect of OW channel and different form of noises such as receiver thermal noise, background channel noise and photo detector shot noise. Analysis is developed for an OFDM system over the OW channel, taking into account the effect of pointing error between the transmitter and the receiver in turbulent condition and the analysis reveals that the OFDM OW system is less affected by pointing error with deference to the major power penalty at BER performance. For instance, power penalty at BER 10−9 is found to be 3 dB for 256 OFDM subcarriers with 9 millidegree displacement angle at a data rate of 10 Gbps under turbulent condition. It is found that the system is more influenced by the atmospheric turbulence at a higher data rate.

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