Matched filter based synchronizer design for rapid synchronization of packet data transmissions in DS-CDMA personal communications systems

This paper considers two types of digital matched filter-based synchronizers. One is applied with biphase spreading, and the other with quadri-phase spreading. The synchronizers are primarily designed for application on reverse links of the IS-95 type systems, but with minor modifications they can also be used in other DS-CDMA systems. Probabilities of correct acquisition and false alarm for both Gaussian and Rayleigh fading channels are derived. The differential approach is considered to reduce the number of required operations. Numerical results are presented when a specially designed packet synchronization preamble is used, and the mean acquisition time is evaluated.