On code tracking in direct sequence spread spectrum systems usingadaptive filtering techniques

摘要

This paper investigates the tracking of DS/SS signals based on anadaptive filtering technique. It is shown that a previously proposedsystem for code acquisition is also capable of code tracking and, byperforming both acquisition and tracking with the same circuitry,significant simplification in the overall DS/SS receiver is gained.Analytical results show that the proposed scheme has a good trackingperformance, as measured by the hold-in time and the false alarm penaltytime, and less sensitivity to variations in the received SNR compared toconventional delay lock loops (DLLs)