Title :
The Effect of Imperfect Channel Estimation on the Performance of Maximum Ratio Combining in the Presence of Cochannel Interference
Author :
Tokgoz, Yeliz ; Rao, Bhaskar D.
Author_Institution :
Qualcomm Inc., San Diego, CA
Abstract :
In this paper, the effects of imperfect channel estimation on maximum ratio combining performance in receive antenna diversity systems with multiple cochannel interferers are examined. The channel considered is a slowly varying flat Rayleigh fading channel that is also spatially independent. The combiner weights are the imperfect estimates of the desired user´s fading coefficients and are assumed to be complex Gaussian distributed. Closed-form expressions for signal-to-interference-plus-noise ratio distribution and outage probability are obtained for both equal-power and unequal-power interferer scenarios. Using these expressions, the effect of channel estimation quality on system performance is investigated
Keywords :
Gaussian distribution; Rayleigh channels; channel estimation; cochannel interference; diversity reception; receiving antennas; channel estimation quality; closed-form expressions; complex Gaussian distribution; fading coefficients; imperfect channel estimation effect; maximum ratio combining; multiple cochannel interference; outage probability; receive antenna diversity systems; signal-to-interference-plus-noise ratio distribution; slowly varying flat Rayleigh fading channel; unequal-power interferer scenario; Bit error rate; Channel estimation; Closed-form solution; Diversity reception; Estimation error; Fading; Interchannel interference; Receiving antennas; Signal to noise ratio; System performance; Antenna diversity; cochannel interference; imperfect channel estimation; maximum ratio combining (MRC);
Journal_Title :
Vehicular Technology, IEEE Transactions on
DOI :
10.1109/TVT.2006.878556
