A new architecture of matched-filter employing coefficient recode technique for spread spectrum communication systems

The digital matched-filter (DMF) has been widely used in direct sequence spread spectrum (DSSS) communications systems. In this paper, we present a new architecture of DMF for DSSS communication systems by employing the coefficient recode technique. According to the new architecture, the complexity of DMF is approximately reduced more than 50% of that of conventional digital matched filter (CDMF) for fixed coefficient PN sequence, but that doesn´t induce any degradation in performance. The new architecture is more suitable for low power VLSI implementations of fixed coefficient DMF. The results for variable coefficient DMF are also discussed in this paper.