高速移动环境下OTSMB-LMMSE-PIC迭代检测方法  

B-LMMSE-PIC iterative detection method for OTSM in high-speed mobile environment

作　　者：李国军 郑翔[1,2] 王杰 LI Guojun;ZHENG Xiang;WANG Jie(School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;Lab of Beyond LOS Reliable Information Transmission,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065 [2]重庆邮电大学超视距可信信息传输研究所,重庆400065

出　　处：《通信学报》2025年第1期13-22,共10页Journal on Communications

基　　金：国家自然科学基金资助项目(No.U22A2006);重庆市自然科学基金资助项目(No.CSTB2023NSCQ-LZX0082)。

摘　　要：为提升正交时序复用(OTSM)在高速移动环境下传输的可靠性,提出了一种基于并行干扰消除的分块线性最小均方误差(B-LMMSE-PIC)迭代检测方法。该方法在时域分块进行MMSE-PIC符号估计,并且使用诺伊曼(Neumann)级数逼近涉及的矩阵反演,将计算复杂度降为线性阶;随后在时延-序列域计算估计符号的均值与方差作为下一次迭代的先验信息。仿真结果表明,在移动速度为540km/h的场景下使用16QAM调制且误码率为10-4时,所提方法与目前广泛使用的基于最大比合并(MRC)的迭代rake检测方法相比有2.48dB的性能增益。To improve the reliability of orthogonal time sequency multiplexing(OTSM)transmission in high-speed mobile environments,a block linear minimum mean square error with parallel interference cancellation(B-LMMSE-PIC)iterative detection method was proposed.The MMSE-PIC symbol estimation was performed in the time domain by block,and the Neumann series approximation was used for matrix inversion,which reduced the computational complexity to linear order.Subsequently,the mean and variance of the estimated symbols in the delay-sequency domain were calculated to provide prior information for the next iteration.Simulation results demonstrated that,under conditions of 540 km/h mobile speed and 16QAM modulation with a BER of 10-4,the proposed method achieves a performance gain of 2.48 dB compared to the widely used iterative rake detection algorithm based on maximum ratio combining(MRC).

关 键 词：正交时序复用 线性最小均方误差 并行干扰消除 诺伊曼级数 

分 类 号：TN926[电子电信—通信与信息系统]