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Switch‐and‐examine combining with different new switch statistics for diversity over Rayleigh fading channels
Author(s) -
Chau Yawgeng A.,
Chen YaoHua
Publication year - 2014
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.2442
Subject(s) - fading , rayleigh fading , independent and identically distributed random variables , computer science , phase shift keying , diversity combining , statistics , algorithm , diversity scheme , signal to noise ratio (imaging) , telecommunications , electronic engineering , bit error rate , mathematics , channel (broadcasting) , random variable , engineering
SUMMARY Three schemes of multibranch switch‐and‐examine combining (MSEC) with switch statistics different from the signal‐to‐noise ratio used in the traditional MSEC are analyzed. For each diversity branch, with its fading factor a and low‐passed received signal r , the switch statistics for the three MSEC schemes considered in the paper are | r | , | ar | , and a linear combination of a and | r | , respectively. To illustrate the performances of the MSEC schemes, the average BER of each MSEC scheme with BPSK signaling is evaluated for independent and identically distributed Rayleigh fading channels. For performance optimization, the optimal switch thresholds of the MSEC schemes are obtained. Numerical results based on the analysis and simulations are presented for performance illustrations. Copyright © 2012 John Wiley & Sons, Ltd.