Performance of matched-filter acquisition for a DS/SSMA system in a frequency-selective fading channel

Abstract

This paper evaluated the performance of a non-coherent parallel matched-filter acquisition scheme with a reference filter (RF) for a direct-sequence/spread-spectrum multiple access (DS/SSMA) system in a frequency-selective fading channel. Mean acquisition time for the parallel MF-RF acquisition scheme is derived for a frequency-selective Rayleigh fading channel. This acquisition scheme employs a reference filter to estimate the variance of interference at the output of the detecting matched filter. For application to multiuser communication environments, multiple access interference is considered in the performance analysis. It is shown that the parallel MF-RF scheme yields a smaller mean acquisition time than MF schemes without RF for a frequency-selective Rayleigh fading channel. A parallel MF-RF scheme can be applied to the reverse link (mobile-to-base station) of a CDMA system operating in a frequency-selective fading channel.