On Designs of Full Diversity Space-Time Block Codes for Two-User MIMO Interference Channels

TL;DR

This paper proposes a new design criterion for space-time block codes in two-user MIMO interference channels, enabling full diversity with group zero-forcing receivers and high code rates as delay increases.

Contribution

It introduces a novel design criterion for STBCs that guarantees full diversity in two-user MIMO interference channels using group ZF receivers.

Findings

Achieves full diversity with the proposed STBC and group ZF receiver.

Code rate approaches one as encoding delay increases.

Performance results confirm guaranteed full diversity.

Abstract

In this paper, a design criterion for space-time block codes (STBC) is proposed for two-user MIMO interference channels when a group zero-forcing (ZF) algorithm is applied at each receiver to eliminate the inter-user interference. Based on the design criterion, a design of STBC for two-user interference channels is proposed that can achieve full diversity for each user with the group ZF receiver. The code rate approaches one when the time delay in the encoding (or code block size) gets large. Performance results demonstrate that the full diversity can be guaranteed by our proposed STBC with the group ZF receiver.