The performance of a suboptimal diversityreceiver in a frequency-nonselective slow Rayleighfading AWGN channel is analyzed. The channel isestimated by using pilot symbols that aretime-multiplexed with the data symbols in the transmitted signal. Theestimator is based on time-variant smoothing, and it canbe approximated by time-invariant smoothing andinterpolation. The paper includes both mean-square error analysis and bit error probabilityanalysis. The results are verified by some typicalperformance curves. It is shown that under suitableconditions (no aliasing in channel estimation), thesystem based on a time-invariant smoother and an idealinterpolator has the same performance as thetime-variant smoother and does not have any error-ratebottoming effect at large signal-to-noise ratios. Atsmall signal-to-noise ratios, the smoother must bematched to the Doppler power spectrum of the channel.The ideal interpolator can usually be approximated by alinear interpolator.
|Pages (from-to)||205 - 214|
|Number of pages||10|
|Journal||International Journal of Wireless Information Networks|
|Publication status||Published - 1997|
|MoE publication type||A1 Journal article-refereed|