In this letter, we propose an iterative soft interference cancellation scheme for intra-cluster (ICL) and out-of-cluster (OCL) interference mitigation in user-centric clustered cell-free massive multiple-antenna networks. We propose a minimum mean-square error receive filter with a novel modified parallel interference cancellation scheme to mitigate ICL and OCL interference. Unlike prior work, we model the OCL interference and devise a least squares estimator to perform OCL interference estimation. An iterative detection and decoding scheme that adopts low-density parity check codes and incorporates the OCL interference estimate is developed. Simulations assess the proposed scheme against existing techniques in terms of bit error rate performance.

翻译：本文针对用户中心化簇状无蜂窝大规模多天线网络中的簇内干扰与簇间干扰抑制，提出了一种迭代软干扰消除方案。我们设计了一种结合新型改进型并行干扰消除技术的最小均方误差接收滤波器，以同时抑制簇内与簇间干扰。与现有研究不同，本文对簇间干扰进行建模，并设计了最小二乘估计器以实现簇间干扰估计。在此基础上，开发了一种采用低密度奇偶校验码并融合簇间干扰估计值的迭代检测与解码方案。仿真实验从误码率性能角度，将所提方案与现有技术进行了对比评估。