Direct-Sequence Spread-Spectrum Parallel Acquisition in a Fading Mobile Channel

Abstract

Spread-spectrum systems offer high immunity to interference and hostile environments. However, this high immunity can be fully exploited only if precise receiver synchronization is performed. In the last few years, some parallel acquisition schemes have been suggested to reduce the mean acquisition time. Most of the work done, however, considered either the effect of additive white Gaussian noise (AWGN) only or AWGN and narrow-band jamming. In this paper, a parallel acquisition scheme for direct-sequence spread-spectrum systems is proposed, and its mean acquisition time performance is analyzed in both nonfading and Rayleigh fading environments. The parallel scheme is compared to the corresponding serial scheme, and a significant improvement of performance is shown. The derived results provide the tool to study the interaction of many of the design parameters in the system. © 1990 IEEE