Adaptive Prediction Iterative Channel Estimation for Combined Antenna Diversity and Coherent Rake Reception of Multipath-Faded DSSS Signals

Shinsuke TAKAOKA  Fumiyuki ADACHI  

IEICE TRANSACTIONS on Communications   Vol.E85-B   No.11   pp.2405-2415
Publication Date: 2002/11/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Terrestrial Radio Communications
iterative channel estimation,  pilot symbol,  DSSS,  fading channel,  

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Adaptive prediction iterative channel estimation is presented for combined antenna diversity and coherent rake reception of direct sequence spread spectrum (DSSS) signals. Its first stage uses pilot-aided adaptive prediction channel estimation, while the succeeding iteration stages use decision feedback and moving average filtering for channel re-estimation. The bit error rate (BER) performance of DSSS signal computer simulations evaluate transmission in a frequency selective Rayleigh fading channel. It is found that the adaptive prediction iterative channel estimation is superior to the non adaptive iterative channel estimation using the conventional weighted multi-slot averaging (WMSA) filtering at the first iteration stage, particularly in a fast fading channel.