Movable Antenna Enhanced MIMO Communications with Spatial Modulation

TL;DR

This paper explores the use of movable antennas in MIMO systems with spatial modulation, proposing a joint design framework that improves communication reliability and reduces costs through flexible antenna placement.

Contribution

It introduces a novel joint transceiver design for MA-enabled MIMO with spatial modulation, optimizing antenna placement and signal processing to minimize bit error rate.

Findings

Proposed algorithm converges rapidly.

Significant BER performance improvement over benchmarks.

Effective joint antenna placement and transceiver design.

Abstract

Movable antenna (MA) has demonstrated great potential in enhancing wireless communication performance. In this paper, we investigate an MA-enabled multiple-input multiple-output (MIMO) communication system with spatial modulation (SM), which improves communication performance by utilizing flexible MA placement while reducing the cost of RF chains. To this end, we propose a joint transceiver design framework aimed at minimizing the bit error rate (BER) based on the maximum minimum distance (MMD) criterion. To address the intractable problem, we develop an efficient iterative algorithm based on alternating optimization (AO) and successive convex approximation (SCA) techniques. Simulation results demonstrate that the proposed algorithm achieves rapid convergence performance and significantly outperforms the existing benchmark schemes.