新型减格辅助MIMO-OFDM预编码传输机制  

Novel Lattice Reduction Auxiliary MIMO-OFDM Pre-Coding Transmission Scheme

作　　者：卢继华[1] 刘丹[2] 郑建勇 王爱华[1] 刘子群[4] 

机构地区：[1]北京理工大学信息与电子学院,北京100081 [2]中国空间技术研究院通信卫星事业部,北京100094 [3]联发博动科技(北京)有限公司,北京100015 [4]北京交通大学电子信息工程学院,北京100044

出　　处：《北京理工大学学报》2015年第11期1171-1176,共6页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金资助项目(61002014;61101129;61072050;61227001);国家"八六三"计划项目(2012AA121604)

摘　　要：MIMO-OFDM架构下提出了收发端均结合减格辅助的传输机制：发送端与接收端分别将减格辅助与THP预编码及QR分解-串行检测相结合,将信道矩阵转化为列近似正交的矩阵,提高了系统的抗噪性能.分析和仿真表明,发送端采用减格辅助THP预编码比传统的基于不同准则QR分解的THP预编码在误码率为10^-2时有1～2dB左右的性能提升,接收端提出的LRA-QRM结合串行干扰对消检测算法相比LRA-MMSE算法有1dB左右的误码性能提升.A novel Tomlinson-Harashima precoding（THP）transmission method in MIMOOFDM system was presented,applying lattice reduction auxiliary（LRA）and TH pre-coding in the transmitter and LRA and serial interference detection algorithm in the receiver.This novel transmission method can transfer channel matrix into an approximate orthogonal matrix to significantly improve the anti-noise performance.Simulation and analysis results show that LRATHP transmission can increase the system performance by 1～2dB under error rate of 10^-2 comparing with traditional THP transmission,and LRA-QRM-SIC detection algorithm can provide better performance than LRA-MMSE algorithm by 1dB.

关 键 词：MIMO-OFDM 减格辅助 Tomlinson-Harashima预编码 QR分解 串行干扰对消 

分 类 号：TN911.22[电子电信—通信与信息系统]