Title :
Effect of imperfect channel estimation on MRC diversity in fading channels
Author :
Ma, Yao ; Schober, R. ; Pasupathy, S.
Author_Institution :
Dept. of Electr. & Comput. Eng., Iowa State Univ., Ames, IA, USA
Abstract :
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.
Keywords :
Gaussian processes; Rician channels; channel estimation; diversity reception; phase shift keying; probability; Gaussian weighting errors; M-ary phase shift keying; MRC diversity; Rician fading channels; SNR statistics; decision variable; imperfect channel estimation; maximum ratio combining; moment generating function approaches; outage probability; signal-to-noise ratio; Channel estimation; Diversity reception; Error analysis; Fading; Ice; Phase shift keying; Probability; Rician channels; Signal generators; Signal to noise ratio;
Conference_Titel :
Communications, 2004 IEEE International Conference on
Print_ISBN :
0-7803-8533-0
DOI :
10.1109/ICC.2004.1313127
