Phase-Locked Loop Design for Multipath Mitigation

Abstract

This paper introduces a new design of Phase-Locked Loop (PLL) that makes receivers with spread spectrum techniques able to work properly in an environment of multipath effect while the receivers with standard PLL is disabled. Basically multipath effect is an inevitable error that can not be removed from the received signal even with the use of a large process gain. The multipath has a dominant effect because the statistical model differs for each possible receiver location. An investigation of both the standard PLL and the new PLL is introduced. A mathematical approach of the new PLL is presented. Simulation results for both the standard and the new PLL are given. The paper is terminated with conclusions and future work.