CDMA Receiver Based on Improved Frequency Domain Equalization and PIC

Abstract

A Code Division Multiple Access (CDMA) downlink receiver based on Adaptive Overlap-Cut (AOC) Method Frequency Domain Equalization (FDE) and non-linear feedback Parallel Interference Cancellation (PIC) is proposed. Firstly, the analysis for the generation and the distribution of the inherent error of Overlap-Cut (OC) Method FDE carries out the improved version of it called AOC Method FDE. Secondly, one PIC scheme with non-linear feedback is designed. After the nonlinear processing, the users' feedback information during the PIC iteration will be adjusted according to its reliability. As a result of both theoretical analysis and simulation, AOC Method FDE outperforms the original OC Method with lower complexity, and the non-linear feedback PIC improves the performance of the receiver further.