Effect of imperfect channel estimation on MRC diversity in fading channels

TitleEffect of imperfect channel estimation on MRC diversity in fading channels
Publication TypeConference Paper
Year of Publication2004
AuthorsMa, Y., R. Schober, and S. Pasupathy
Conference NameCommunications, 2004 IEEE International Conference on
Pagination3163 - 3167 Vol.6
Date Publishedjun.
Keywordschannel estimation, decision variable, diversity reception, Gaussian processes, Gaussian weighting errors, imperfect channel estimation, M-ary phase shift keying, maximum ratio combining, moment generating function approaches, MRC diversity, outage probability, phase shift keying, probability, Rician channels, Rician fading channels, signal-to-noise ratio, SNR statistics

In this paper, we study the effect of imperfect channel estimation (ICE) on the performance of M-ary phase shift keying (M-PSK) with maximum ratio combining (MRC) in generalized Rician fading channels. Using decision variable (DV)-based and signal-to-noise ratio (SNR)-based moment generating function (MGF) approaches, error and outage probability formulas, and SNR statistics for the M-PSK MRC receiver are derived, taking into account the effects of ICE and all relevant system and channel parameters. We analytically quantify the average SNR (ASNR) loss of M-PSK caused by ICE, and provided a unified MGF expression for ICE and different M's. In addition, we point out a major approximation for a popular approach used in the literature to evaluate the adverse effect of Gaussian weighting errors.


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