Improved blind multipath estimation for long code DS-CDMA

Abstract

This paper proposes a blind channel estimation scheme for long code direct sequence code division multiple access (DS-CDMA) systems with multipath fading channels. This scheme combines the advantages of Toeplitz displacement and correlation matching methods to achieve improved performance. The basic idea is to remove the effects of noise and interferences with Toeplitz displacement operation and then estimate the multipath channel parameters with the correlation matching method. Simulation results are presented to show that the proposed scheme provides better MSE performance and robustness against the near-far problem.