Reconfigurable intelligent surface-assisted N-ary Alamouti.

ABSTRACT: Reconfigurable intelligent surface (RIS)-assisted transmission has become a novel concept for future wireless communications. The multiple-input multiple-output (MIMO)-based RIS-assisted Alamouti (RIS-Alamouti) scheme has been recently proposed in the literature. The RIS-Alamouti scheme models the conventional Alamouti scheme with two transmit antennas and [Formula: see text] receive antennas. In this paper, we propose a novel MIMO-based scheme, hereinafter referred to as the N-ary RIS-assisted Alamouti (N-RIS-Alamouti) scheme. In the proposed N-RIS-Alamouti scheme, [Formula: see text] additional information bits can be conveyed by transmitting a pair of N-ary phase shift keying (NPSK) symbols in one of two transmit antennas over four time slots. The pair of NPSK symbols can be regarded as

SUBMITTER: Xu H 

PROVIDER: S-EPMC12583594 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature