LTE-A系统中改进的信道估计算法的研究及实现  

Research and Implementation of the Improved Channel Estimation Algorithm in LTE-A System

作　　者：陈发堂[1] 董丽[1] 

机构地区：[1]重庆邮电大学重庆市移动通信技术重点实验室,重庆400065

出　　处：《自动化仪表》2016年第1期9-12,共4页Process Automation Instrumentation

基　　金：国家科技重大专项基金资助项目(编号:2011ZX03001-003-01)

摘　　要：先进的长期演进(LTE-A)系统接收端需要对多径信道进行动态估计和跟踪,以满足相干解调的目的,准确而有效的信道估计方法可以提高数据传输速率。针对线性最小均方误差(LMMSE)信道估计矩阵求逆运算复杂度大的问题,提出一种基于GaussSeidel算法的低复杂度的LMMSE算法。通过对基于导频的几种常用的信道估计算法进行对比分析和研究,得到的LMMSE算法具有较低的误比特率和算法复杂度。最后基于Gauss-Seidel算法,分别设计了低复杂度LMMSE算法的各个子模块的DSP实现方案。The receiving end of the LTE-A system needs to dynamically estimating and tracking maltipath channels for satisfying the purpose of coherent demodulation; while accurate and effective method of channel estimation can improve the data transmission rate. To reduce the complexity of the matrix inverse operation in linear minimum mean square error （ LMMSE ） channel estimation algorithm, the low complexity LMMSE algorithm based on Gauss-Seidel algorithm is proposed. Through comparative analysis and research on several commonly used channel estimation algorithms based on pilot signal, it is found that the low complexity LMMSE algorithm features lower bit error rate and algorithm complexity. Finally,the low complexity LMMSE algorithm based on Gauss-Seidel algorithm and the DSP implementing scheme of each sub- module are designed respectively.

关 键 词：先进的长期演进(LTE-A) 信道估计 相干解调 线性最小均方误差(LMMSE)算法 Gauss-Seidel算法 最小二乘算法 DSP 

分 类 号：TH89[机械工程—仪器科学与技术] TP336[机械工程—精密仪器及机械]