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Exact capacity analysis of multi‐relay multiuser cooperative networks based on two‐step selection
Author(s) -
Guo Weidong,
Liu Ju,
Liu Yuxi,
Zheng Lina,
Zhang Guowei
Publication year - 2013
Publication title -
international journal of communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1074-5351
DOI - 10.1002/dac.2374
Subject(s) - computer science , relay , rayleigh fading , independent and identically distributed random variables , selection (genetic algorithm) , correctness , scheme (mathematics) , channel (broadcasting) , channel state information , relay channel , expression (computer science) , fading , outage probability , channel capacity , joint (building) , mathematical optimization , computer network , telecommunications , algorithm , wireless , mathematics , random variable , statistics , artificial intelligence , architectural engineering , mathematical analysis , engineering , power (physics) , quantum mechanics , programming language , physics
SUMMARY This paper advocates the capacity analysis of an amplify‐and‐forward cooperative communication system model in multi‐relay multiuser networks. A two‐step selection scheme is adopted, and both relay and user selection are based on the outdated channel state information. Exact expression of channel capacity for independent, but not necessarily identically distributed, Rayleigh fading channels is derived. Finally, simulations are carried out to verify the correctness of theoretical analysis and illustrate the effect of parameters on the performance. Results show that although the performance of our scheme is inferior to the optimal joint selection scheme, it is still a practical scheme because its complexity is much lower than that of the optimal scheme. Copyright © 2012 John Wiley & Sons, Ltd.