Channel feedback quantization methods for MISO and MIMO systems
Channel feedback quantization methods for MISO and MIMO systems
复制标题
MISO 和 MIMO 系统的信道反馈量化方法
DOI：
10.1109/pimrc.2004.1373811
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
B. Rao
中科院分区：
文献类型：
--
作者：
J. Roh;B. Rao
我们研究了通过低速率反馈信道反馈的多天线信道的量化。针对多输入单输出(MISO)系统，提出了一种新的随机波束形成矢量量化设计准则和相应的设计算法。针对多输入多输出(MIMO)信道，将多个正交化矢量作为信道空间信息进行量化，提出了一种矩阵分解方法，该方法提供了一种在量化空间信息矩阵的同时利用正交化几何结构的方法。结果表明，多个空间信道上的量化比特分配对系统性能有重要影响，最佳比特分配取决于系统的工作发射功率。
We investigate the quantization of multiple antenna channel to feed back through a low-rate feedback channel. Specifically, for multiple-input single-output (MISO) systems, we propose a new design criterion and the corresponding design algorithm for quantization of the random beamforming vector. For multiple-input multiple-output (MIMO) channels, which have multiple orthonormal vectors as channel spatial information for quantization, a matrix factorization method is proposed which provides a way to exploit the geometrical structure of orthonormality while quantizing the spatial information matrix. Results show that the quantization bit allocation over multiple spatial channels has a critical effect on the performance, and that the optimum bit allocation depends on the operating transmit power of the system.