设计鲁棒预编码器，提升细胞自由大规模MIMO系统抗信道误差能力。
Robust Precoding for Resilient Cell-Free Networks
- 基于信道状态信息误差统计设计鲁棒预编码方案
- 在总功率约束下显著降低信号均方误差与干扰泄漏
- 算法收敛快、计算量低，适合实际部署
本文提出一种针对鲁棒细胞自由大规模MIMO（CF-mMIMO）系统的预编码设计方法，在总发射功率约束下，最小化加权后的期望信号均方误差（MSE）与残留干扰泄漏功率之和。该方法利用信道状态信息（CSI）误差的统计特性，增强系统对信道估计不完善情况的鲁棒性。采用以最小均方误差类解为初值的交替优化算法，迭代更新预编码矩阵，同时保持较低的计算复杂度并确保快速收敛。数值结果表明，所提方法显著优于传统线性预编码器，在性能与计算效率之间实现了良好平衡。
原文摘要 · Abstract (English)
This paper presents a robust precoder design for resilient cell-free massive MIMO (CF-mMIMO) systems that minimizes the weighted sum of desired signal mean square error (MSE) and residual interference leakage power under a total transmit power constraint. The proposed robust precoder incorporates channel state information (CSI) error statistics to enhance resilience against CSI imperfections. We employ an alternating optimization algorithm initialized with a minimum MSE-type solution, which iteratively refines the precoder while maintaining low computational complexity and ensuring fast convergence. Numerical results show that the proposed method significantly outperforms conventional linear precoders, providing an effective balance between performance and computational efficiency.
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