A Blind Time-Reversal Detector in the Presence of Channel Correlation

TL;DR

This paper introduces a blind time-reversal detection method that accounts for channel correlation, providing an accurate likelihood ratio test and demonstrating improved performance over existing detectors in correlated channels.

Contribution

It presents a novel blind detection approach using time reversal with exact moments and an Edgeworth expansion for correlated channels, enhancing detection accuracy.

Findings

Performance gain over existing detectors in correlated channels

Accurate approximation of test statistic distribution

Effective detection with strong target signals

Abstract

A blind target detector using the time reversal transmission is proposed in the presence of channel correlation. We calculate the exact moments of the test statistics involved. The derived moments are used to construct an accurate approximative Likelihood Ratio Test (LRT) based on multivariate Edgeworth expansion. Performance gain over an existing detector is observed in scenarios with channel correlation and relatively strong target signal.