Effect of channel estimation errors on MRC diversity in Rician fading channels

TitleEffect of channel estimation errors on MRC diversity in Rician fading channels
Publication TypeJournal Article
Year of Publication2005
AuthorsMa, Y., R. Schober, and S. Pasupathy
JournalVehicular Technology, IEEE Transactions on
Pagination2137 - 2142
Date Publishednov.
Keywordschannel estimation, diversity reception, error probability formulas, error statistics, imperfect channel estimation, M-ary phase shift keying, maximum ratio combining, phase shift keying, PSK, Rician channels, Rician fading channels, signal-to-noise ratio, SNR

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. First, we derive the error probability formulas for M-PSK with MRC and ICE in arbitrary Rician fading channels. Furthermore, we derive the effective receiver output signal-to-noise ratio (SNR) statistics and the outage probability, and analytically quantify the average SNR loss of M-PSK caused by ICE, assuming independent diversity branches. Finally, we point out a major approximation in a popular approach used in the literature to evaluate the adverse effect of ICE.


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