Modulus Zero-Forcing Detection for MIMO Channels

TL;DR

This paper introduces a novel modulus zero-forcing detection method for MIMO channels that leverages finite alphabet properties to improve detection performance by allowing controllable interferences removable via modulus operations.

Contribution

The paper proposes a new MZF detection technique that enhances traditional ZF detection by exploiting finite alphabet structures for better interference management.

Findings

Improved detection performance over conventional ZF methods.

Effective use of modulus operations to handle interferences.

Potential for better MIMO system reliability.

Abstract

We propose a modulus based zero-forcing (MZF) detection for multi-input multi-output (MIMO) channels. Traditionally, a ZF detector nulls out all interferences from other layers when detecting a current layer, which can yield suboptimal detection-performance due to the noise-enhancement issue. In many communication systems, finite alphabets such as M quadrature-amplitude-modulation (QAM) are widely used, which comprises \sqrt{M} pulse-amplitude-modulation (PAM) symbols for the real and imaginary parts. With finite alphabets, one feasible way to improve ZF detection is to allow controllable interferences that can be removed away by modulus operations.