Acquisition of Spread Spectrum Signals by an Adaptive Array

This paper discusses discrete-time processing techniques for the acquisition of a direct-sequence-spread-spectrum signal from an antenna array. Both constant data and random data modulating the code are considered. The maximum likelihood procedures for estimating the received code lag are described, assuming an unknown channel and interference of either known or unknown covariance. Analytic and simulation results for performance of the optimum processors, as well as suboptimum procedures, are presented.