On the Performance of RIS-Aided Spatial Scattering Modulation for mmWave Transmission

TL;DR

This paper analyzes the performance of a RIS-assisted spatial scattering modulation scheme for mmWave systems, considering practical near-transmitter RIS placement and deriving error probabilities validated by simulations.

Contribution

It introduces a realistic RIS-SSM model for mmWave, deriving error probability bounds and analyzing performance in near-transmitter RIS scenarios.

Findings

Derived the CPEP expression for RIS-SSM under different beam demodulation conditions.

Obtained the union upper bound of average bit error probability.

Validated analytical results with Monte Carlo simulations.

Abstract

In this paper, we investigate a state-of-the-art reconfigurable intelligent surface (RIS)-assisted spatial scattering modulation (SSM) scheme for millimeter-wave (mmWave) systems, where a more practical scenario that the RIS is near the transmitter while the receiver is far from RIS is considered. To this end, the line-of-sight (LoS) and non-LoS links are utilized in the transmitter-RIS and RIS-receiver channels, respectively. By employing the maximum likelihood detector at the receiver, the conditional pairwise error probability (CPEP) expression for the RIS-SSM scheme is derived under the two scenarios that the received beam demodulation is correct or not. Furthermore, the union upper bound of average bit error probability (ABEP) is obtained based on the CPEP expression. Finally, the derivation results are exhaustively validated by the Monte Carlo simulations.