一种基于SC-FDMA系统改进的LMMSE信道估计算法  

A Modified LMMSE Channel Estimation Algorithm for SC- FDMA

作　　者：栾亚婷 阚春荣[1] 杜昊阳 

机构地区：[1]解放军理工大学通信工程学院国家短波工程中心,江苏南京210007

出　　处：《通信技术》2015年第9期1015-1019,共5页Communications Technology

摘　　要：对于LTE上行链路来说,寻求性能优良的信道估计算法是十分必要的。传统的最小平方(LS)和线性最小均方误差(LMMSE)信道估计算法存在许多不足。其中,在研究过程中会发现传统线性最小均方误差(LMMSE)信道估计算法具有计算复杂度大的问题。然而,通过借助于雅克比迭代算法解决线性方程的理念,能够对传统的LMMSE算法做进一步的改进。同时,理论分析和仿真结果表明:该算法在低信噪比下表现出良好的性能,它不仅降低了计算复杂度,而且估计结果更精确。The channel estimation algorithm with excellent performance is essential for LTE （Long Term Evolution） uplink. Many defects usually exist in the traditional LS （Least Square） algorithm and LMMSE （Liner Minimum Mean-Square） algorithm. Research on the traditional LMMSE algorithm indicates its fairly large complexity. And with Jacobi iterative algorithm for solving linear equations, the traditional IMMSE algorithm could be further improved. Meantime theoretical analysis and simulation results show that the modified LMMSE algorithm performs fairly well at low SNR, and could reduce the computational complexity while achieving more precise estimation result.

关 键 词：信道估计 LMMSE算法 雅克比迭代 

分 类 号：TN929.5[电子电信—通信与信息系统]