Turbo-coded blind per-survivor processing multiuser detection CDMA

Abstract

Joint data and blind channel estimation based on the principle of per-survivor processing (PSP) is invoked and characterised in the proposed turbo-coded multiuser detection assisted code division multiple access (CDMA) system. The turbo-coded blind PSP receiver invoked the likelihood function in its metric calculations over the typical urban (TU) time-variant COST 207 fading channel fluctuating at Doppler frequencies between 0.8 Hz and 80 Hz. The size of the turbo interleaver was shown to be critical as regards to the overall system performance, and for a rectangular turbo interleaver size of 55/spl times/55 bits in conjunction with a 100/spl times/100-bit or 156/spl times/156-bit channel interleaver no transmission errors were recorded for the above two Doppler frequencies over the COST 207 TU fading channel.