High-Rate Space Coding for Reconfigurable 2x2 Millimeter-Wave MIMO Systems

TL;DR

This paper introduces a novel rate-two space coding scheme for 2x2 millimeter-wave MIMO systems that leverages reconfigurable antennas and high directivity to improve performance with low decoding complexity.

Contribution

It presents a new rate-two space coding design tailored for millimeter-wave MIMO systems using reconfigurable antennas, enhancing performance over traditional schemes.

Findings

Outperforms traditional spatial multiplexing schemes like VBLAST.

Achieves low-complexity decoding with improved bit-error-rate.

Demonstrates superior efficiency through numerical simulations.

Abstract

Millimeter-wave links are of a line-of-sight nature. Hence, multiple-input multiple-output (MIMO) systems operating in the millimeter-wave band may not achieve full spatial diversity or multiplexing. In this paper, we utilize reconfigurable antennas and the high antenna directivity in the millimeter-wave band to propose a rate-two space coding design for 2x2 MIMO systems. The proposed scheme can be decoded with a low complexity maximum-likelihood detector at the receiver and yet it can enhance the bit-error-rate performance of millimeter-wave systems compared to traditional spatial multiplexing schemes, such as the Vertical Bell Laboratories Layered Space-Time Architecture (VBLAST). Using numerical simulations, we demonstrate the efficiency of the proposed code and show its superiority compared to existing rate-two space-time block codes.