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文中基于信道相关矩阵的特征值分解方法得到最优码本,接着再根据最小相位差原则,提出了一种新的从最优码本到固定码本的映射方法,从而大量节省了反馈信息的比特数,改善了系统容量。但使用固定码本时需要在链路性能损失和减少反馈比特开销间作出权衡。仿真和分析表明该方法的系统综合性能较好,并对实际系统的实现有一定的借鉴作用。
In this paper, the optimal codebook is obtained based on the eigenvalue decomposition method of channel correlation matrix, and then a new mapping method from the optimal codebook to the fixed codebook is proposed according to the principle of minimum phase difference, so as to save a lot of feedback information The number of bits improves system capacity. However, the use of fixed codebook requires a trade-off between link performance loss and reduced feedback bit overhead. Simulation and analysis show that this method has better system synthesis performance and can be used as a reference for the actual system.