LTE系统中的MIMO空间复用技术
首发时间:2010-07-21
摘要:在LTE系统中为了提高信道容量,满足用户越来越高的速率需求,采用MIMO技术。本文首先分析了MIMO信道提高信道容量的原理,然后重点分析和研究了LTE中所采用的MIMO空间复用技术。LTE系统中的MIMO技术主要是由层映射和预编码两部分完成,文中给出了层映射和预编码的详细算法和实现原理,层映射完成码字到各个层上的传输,而预编码技术则是把信息传输到不同的天线端口进行传输。最后基于硬件系统设计并实现了两天线端口的MIMO空间复用技术,并且采用MATLAB平台生成测试向量的方法验证硬件实现的正确性。
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MIMO spatial multiplexing in LTE system
Abstract:In the LTEsystem,the technology of MIMO is employed to improve the channel capacity,satisfying the user demand of high rate.In this paper, the theory of MIMO channel capacity is analyzed and then the technology of MIMO spatial multiplexing in the LTE system is research.In the LTE system the technology of MIMO contains the layermapping and precoding.The detailed algorithm and theory of layermapping and precoding were given in the paper.And the layermapping is used to realize the transmission of codewords to the layers, precoding realizing the transmission of the data to the antenna ports.Finally,MIMO spatial multiplexing is implemented in the hardware and check the result with the MATLAB test cases.
Keywords: LTE MIMO spatial multiplexing hardware implementation
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