3G LTE系统基于码本的自适应预编码方案

摘要

In the downlink transmission of the third generation Long Term Evolution（3G LTE）system,it is impossible for the eNodeB to obtain the perfect channel state information（CSI）,and a appropriate precoding matrix has to be selected from a fixed codebook according to the feedback information of the user equipment to process the signal.The precoding selection algorithms based on the limited feedback information in cellular systemsis mvestigated,and an adaptive precoding selection algorithm for single-dual stream is Droposed.The performance of the proposed algorithm is analyzed in a 2×2 antenna scenario,and different MIMO precoding schemes are compared and demonstrated by computer simulation.%第三代移动通信系统长期演进（3G LTE）系统的下行链路传输中,基站端无法获知完全的信道状态信息（CSI）,需要根据终端反馈的预编码序号从已有的码本中挑选合适的预编码矩阵进行信号处理。研究了多小区场景下基于有限信息反馈的码本选择算法,提出了一种单双流自适应的码本选择方案,分析了2×2天线情况下所提预编码算法的性能,通过计算机仿真给出了不同多天线预编码方案的性能对比。