Performance analysis of a hybrid acquisition system for DS spread spectrum

Abstract

Hybrid acquisition systems for spread spectrum, that offer a trade-off between the fast acquisition time of parallel search schemes and the reduced hardware complexity of a serial search scheme are analysed in this paper. The presence of multiple acquisition cells, due to multipath fading and the size of the search cell being less than one PN chip, is assumed. Under this assumption a novel verification scheme for the hybrid acquisition system is developed and its performance in terms of mean acquisition time is evaluated. The performance of the proposed hybrid scheme is compared to that of the traditional hybrid scheme as well as the totally parallel phase cell search.