基于散射信道的OFDM/OQAM信道估计方法  

An Channel Estimation Method for OFDM/OQAM Systems Based on Troposcatter Channel

作　　者：邱上飞 薛伦生[1] 陈西宏[1] 吴鹏 QIU Shang-fei;XUE Lun-sheng;CHEN Xi-hong;WU Peng(School of Air and Missile Defense,Air Force Engineering University,Xi’an 710051,China)

机构地区：[1]空军工程大学防空反导学院,西安710051

出　　处：《火力与指挥控制》2019年第2期119-123,共5页Fire Control & Command Control

基　　金：国家自然科学基金资助项目(61671468)

摘　　要：针对散射信道下OFDM/OQAM系统的信道估计问题,将散射信道建模为瑞利衰落信道,对预编码信道估计方法进行了分析,并且提出了一种改进的预编码信道估计方法。该方法通过改变导频结构的布置,减小预编码矩阵的维数,对未编码符号的干扰通过置零法进行消除,从而降低了预编码信道估计方法的计算复杂度。仿真结果表明,改进方法保证了信道估计的性能,与现有的预编码方法相比,改进方法显著降低了计算复杂度,同时不会产生额外的导频功率消耗。The Precoding scatter pilot channel estimation method for OFDM/OQAM system based on troposcatter channel has a high computation complexity,for this problem,an improved Precoding channel estimation method is proposed.This method reduces complexity by change the structure of the pilot,reduce the code number of the codding matrix and set to zero in the other uncoded adjacent symbols in the pilot,thereby reduced the computation complexity efficiently.The simulation results show that the proposed method has a lower complexity than Precoding method,with no extra pilot power consumption and similar channel estimation performance.

关 键 词：散射信道 OFDM/OQAM 信道估计 预编码 

分 类 号：TN911[电子电信—通信与信息系统]