We present a novel iterative detection and decoding (IDD) scheme for Reconfigurable Intelligent Surface (RIS)-assisted multiuser multiple-antenna systems. The proposed approach introduces a joint iterative detection strategy that integrates Low-Density Parity-Check (LDPC) codes, RIS processing and iterative detection and decoding. In particular, we employ a minimum mean square error receive filter that performs truncation at the RIS and soft interference cancelation at the receiver. Simulation results evaluate the system's overall capacity and bit error rate, and demonstrate substantial improvements in bit error rate across block-fading channels.

翻译：本文提出了一种用于可重构智能表面辅助多用户多天线系统的新型迭代检测与解码方案。该方法引入了一种联合迭代检测策略，该策略集成了低密度奇偶校验码、RIS处理以及迭代检测与解码。具体而言，我们采用了一种最小均方误差接收滤波器，该滤波器在RIS端执行截断操作，并在接收端执行软干扰消除。仿真结果评估了系统的整体容量与误码率，并证明了该方案在块衰落信道下能显著改善误码率性能。