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A proof that uncorrelated branch SNRs yield the lowest error rate for MRC receivers operating over Nakagami-m-fading channels

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2 Author(s)
D. C. Lee ; Dept. of Electr. Eng., Univ. of Southern California, Los Angeles, CA, USA ; Lih-feng Tsaur

We analyze the symbol error rate of a multiple-branch predetection maximal ratio combiner for correlated Nakagami-m-fading channels. Focusing on the correlations between diversity branches, we provide a simple analytic proof, applicable to different modulation schemes, that uncorrelated branches result in the lowest symbol error probability. First, we present a proof assuming that all branches have the same fading severity m, where m can be a noninteger. We then present a proof for the case where the branches have different but, integer-valued fading severities (ms).

Published in:

IEEE Transactions on Wireless Communications  (Volume:3 ,  Issue: 5 )