RIS-Assisted Received Adaptive Spatial Modulation for Wireless Communications

TL;DR

This paper introduces a RIS-assisted adaptive spatial modulation scheme that enhances spectral efficiency and error performance in wireless communications by leveraging intelligent surface characteristics for antenna selection.

Contribution

The paper proposes a novel RIS-assisted received adaptive spatial modulation scheme with analytical performance analysis and demonstrates improved spectral efficiency and error performance.

Findings

Higher spectral efficiency achieved

Enhanced bit error rate performance

Potential for practical wireless applications

Abstract

A novel wireless transmission scheme, as named the reconfigurable intelligent surface (RIS)-assisted received adaptive spatial modulation (RASM) scheme, is proposed in this paper. In this scheme, the adaptive spatial modulation (ASM)-based antennas selection works at the receiver by employing the characteristics of the RIS in each time slot, where the signal-to-noise ratio at specific selected antennas can be further enhanced with near few powers. Besides for the bits from constellation symbols, the extra bits can be mapped into the indices of receive antenna combinations and conveyed to the receiver through the ASM-based antenna-combination selection, thus providing higher spectral efficiency. To explicitly present the RASM scheme, the analytical performance of bit error rate of it is discussed in this paper. As a trade-off selection, the proposed scheme shows higher spectral efficiency and remains the satisfactory error performance. Simulation and analytical results demonstrate the better performance and exhibit more potential to apply in practical wireless communication.