Transmit-Receive Generalized Spatial Modulation Based on Dual-layered MIMO Transmission

TL;DR

This paper introduces a novel dual-layered transmit-receive generalized spatial modulation scheme for downlink multiuser MIMO systems, utilizing two receive antenna power levels to improve performance and reduce complexity.

Contribution

The paper proposes DL-TR-GSM, a new scheme using dual-layered transmission with power levels instead of antenna activation, and derives its complexity and performance benefits.

Findings

Significant reduction in computational complexity.

Improved bit error rate performance.

Lower hardware complexity compared to benchmarks.

Abstract

We propose a novel scheme for downlink multiuser multiple-input multiple-output (MIMO) systems, called dual-layered transmit-receive generalized spatial modulation (DL-TR-GSM). The proposed scheme is based on the concept of dual-layered transmission (DLT) which uses two receive antenna power levels instead of receive antenna activation/inactivation to transmit data in the receive spatial domain. Hence, in order to minimize the bit error rate (BER) for DL-TR-GSM, the optimal ratio between the two power levels is determined. To further characterize DL-TR-GSM, we fully derive the computational complexity and show a significant computational complexity reduction as well as a required hardware complexity reduction of DL-TR-GSM, compared to a state-of-the-art benchmark scheme. Simulation results confirm the performance advantages of DL-TR-GSM.