摘要
对空分复用技术中的非理想因素进行了理论分析,并探讨了在上述非理想工程条件下空分复用的应用,给出了实测数据。对于信道条件非理想的场景,即多通道之间相关性高,条件数大,导致高层间干扰,需要通过最优化用户匹配和降维达到最优容量。对于信道测量非理想的场景,深入分析了反馈式和非反馈式的优劣,并指出即使信道不满足互易性条件,非反馈式也是优选方法。针对上述问题,进行了理论分析和外场实测。
We study the performance of space division multiple access （SDMA） under a non-ideal engineering situation. When the SDMA channel is of high inter-layer correlation and the condition number is large, the multiple user multiple input and multiple output user equipment （MUMIMOUE） grouping should be optimized, and in some cases further dimension-reduction should be applied. As the channel measuring is always non-ideal, we use two methods, feedback mode and non-feedback mode, in terms of performance and overhead. It is proposed that the non-feedback mode is preferable even for some non-reciprocal channels. Prin- ciple analysis and test results are given.
