Modulation Diversity for Spatial Modulation Using Complex Interleaved Orthogonal Design

TL;DR

This paper introduces a modulation diversity technique for Spatial Modulation systems using Complex Interleaved Orthogonal Design, achieving higher transmit diversity and improved error performance with two antennas.

Contribution

It proposes a novel use of CIOD in SM systems to attain transmit diversity order of two, enhancing error rate performance.

Findings

Achieves transmit diversity order of two with CIOD in SM.

Improves Symbol Error Rate performance over standard SM.

Validates results through simulation comparisons.

Abstract

In this paper, we propose modulation diversity techniques for Spatial Modulation (SM) system using Complex Interleaved Orthogonal Design (CIOD) meant for two transmit antennas. Specifically, we show that by using the CIOD for two transmit antenna system, the standard SM scheme, where only one transmit antenna is activated in any symbol duration, can achieve a transmit diversity order of two. We show with our simulation results that the proposed schemes offer transmit diversity order of two, and hence, give a better Symbol Error Rate performance than the SM scheme with transmit diversity order of one.