On Max-SINR Receiver for HMT System over Doubly Dispersive Channel

TL;DR

This paper introduces a Max-SINR receiver for HMT systems over doubly dispersive channels, optimizing timing offsets to enhance SINR and BER performance, outperforming traditional methods and showing robustness to channel estimation errors.

Contribution

A novel Max-SINR receiver design for HMT systems that derives closed-form timing offsets tailored to channel scattering functions, improving SINR and BER performance.

Findings

Max-SINR receiver outperforms traditional projection receiver.

Proposed receiver approaches theoretical upper bound SINR.

Receiver maintains robustness against delay spread estimation errors.

Abstract

In this paper, a novel receiver for Hexagonal Multicarrier Transmission (HMT) system based on the maximizing Signal-to-Interference-plus-Noise Ratio (Max-SINR) criterion is proposed. Theoretical analyses show that there is a timing offset between the prototype pulses of the proposed Max-SINR receiver and the traditional projection receiver. Meanwhile, the timing offset should be matched to the channel scattering factor of the doubly dispersive (DD) channel. The closed form timing offset expressions of the prototype pulse for Max-SINR HMT receiver over DD channel with different channel scattering functions are derived. Simulation results show that the proposed Max-SINR receiver outperforms traditional projection scheme and obtains an approximation to the theoretical upper bound SINR performance. Consistent with the SINR performance improvement, the bit error rate (BER) performance of HMT system has also been further improved by using the proposed Max-SINR receiver. Meanwhile, the SINR performance of the proposed Max-SINR receiver is robust to the channel delay spread estimation errors.