戴老师论文阅读:Channel Feedback Based on AoD-AdaptiveSubspace Codebook in FDD MassiveMIMO Systems

Channel Feedback Based on AoD-Adaptive Subspace Codebook in FDD Massive MIMO Systems
2018.11

感觉与信道估计无关,

feedback overhead

path AoDs vary more slowly than the path gains.
第二章 MASSIVE MIMO SYSTEM MODEL
假设每个用户已得到下行链路信道矩阵的估计值;假设信道矩阵的大小可以完美传输,算法只需要考虑角度
用户需要把信道矩阵反馈到BS,从而完善下行链路的预编码过程
AOD的角度相关时间比信道相关时间长,因此提出算法反馈角度不反馈信道矩阵
第三章 PROPOSED AOD-ADAPTIVE SUBSPACE CODEBOOK
A. Angle Coherence Time
B. Proposed AoD-Adaptive Subspace Codebook
C. AoD Acquisition
算法的基本思想是已知信道向量,从中得到AOD后,对AOD使用codebook做量化后反馈给BS
第四章 PERFORMANCE ANALYSIS OF THE PROPOSED AOD-ADAPTIVE SUBSPACE CODEBOOK
A. Rate Gap of Quantized Channel Feedback
B. Quantization Error
C. Feedback Bits
这一章介绍了算法性能的分析系数,与信道估计的思路完全不同

公式

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