Performance Analysis of Iterative Channel Estimation and Multiuser Detection in Multipath DS-CDMA Channels

TL;DR

This paper analyzes the performance of iterative channel estimation and multiuser detection in multipath DS-CDMA systems, providing explicit performance expressions and convergence conditions for the iterative process.

Contribution

It introduces explicit performance expressions and convergence criteria for iterative channel estimation and multiuser detection in multipath DS-CDMA channels.

Findings

Derived explicit performance expressions for channel estimation and detection.

Established conditions for convergence to a fixed point.

Characterized the performance evolution of the iterative system.

Abstract

This paper examines the performance of decision feedback based iterative channel estimation and multiuser detection in channel coded aperiodic DS-CDMA systems operating over multipath fading channels. First, explicit expressions describing the performance of channel estimation and parallel interference cancellation based multiuser detection are developed. These results are then combined to characterize the evolution of the performance of a system that iterates among channel estimation, multiuser detection and channel decoding. Sufficient conditions for convergence of this system to a unique fixed point are developed.