The Research of DLL Used in DS Spread Spectrum Communication System

In direct sequence (DS) spread spectrum communication system, the first condition of receiving correct data is chip synchronization. Delay-locked loop (DLL) is an important part of implementing chip synchronization in digital receiver. This paper explores fundamental of digital DLL, presents basic structure of it. Much attention has been paid for algorithm of phase detector and working principle of loop filter. As we know, how to design parameters of loop filter is a nodus. It has been also discussed in this article. Simulation results are given at the last.