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为了能给实际下行LTE系统接收器设计提供有效的先验信息,考虑下行4×2高阶MIMO天线配置,首先给出了LTE系统下行混合M IMO传输模式的接收信号模型,并且根据MMSE准则和MRC准则分别设计出不同均衡器来抑制这种混合干扰;同时为了提高系统仿真效率,推导出了基于信道响应矩阵随机扰动的信干噪比修正公式。最后通过仿真给出混合MIMO传输模式下,不同模式目标用户的吞吐量变化曲线,结果表明,MMSE均衡器相比MRC均衡器有更大的性能增益,对实际LTE系统的性能分析有较高的参考价值。
In order to provide effective a priori information for the actual downlink LTE system receiver design, considering the downlink 4 × 2 high-order MIMO antenna configuration, the received signal model of the downlink hybrid M IMO transmission mode of the LTE system is given first, and according to the MMSE criterion and MRC criterion to design different equalizers to suppress the mixed interference. In order to improve the system simulation efficiency, a formula to correct SINR based on random disturbance of channel response matrix is derived. The simulation results show that the MMSE equalizer has more performance gain than the MRC equalizer and the performance analysis of the actual LTE system is higher Reference value.