一种基于SVD的LTE系统信道估计算法  

Channel estimation algorithm based on singular value decomposition in LTE system

作　　者：李小文[1] 宋海贝[1] 肖垒[1] 

机构地区：[1]重庆邮电大学移动通信技术重点实验室,重庆400065

出　　处：《计算机应用研究》2011年第9期3467-3469,3473,共4页Application Research of Computers

基　　金：国家科技重大专项资助项目(2009ZX03002-009)

摘　　要：针对长期演进系统中采用块状导频的上行物理信道,提出了一种基于奇异值分解的频域插值算法。与传统的插值算法相比,该算法利用上行物理信道的信道矩阵在时域与频域的变换关系,通过矩阵运算理论推导出导频符号对数据符号的插值实现公式,适用于上行各种导频分布样式。仿真结果表明,该算法在不增加实现复杂度的情况下,可以保证优良的信道估计性能,能够在芯片TMS320C6455中得到高效实现,可以作为TD-LTE综合测试仪的一种上行信道估计的插值备选方案。This paper proposed a novel interpolation approach based on singular value decomposition（SVD） for uplink channel exploiting block type pilot in long term evolution（LTE） system.Unlike the conventional algorithm,the proposed interpolation approach exploited the relationship of channel matrix between time domain and frequency domain,developed the practical formula that pilots interpolated to data symbols through matrix calculating theory,it could be used for all kinds of uplink pilot distribution.The simulation results demonstrate that in the condition of no additional complexity,there is excellent performance of channel estimation,and the efficiency of the approach on TMS320C6455,so it could be a candidate of the interpolation algorithms for uplink channel estimation in the TD-LTE test system.

关 键 词：长期演进 上行物理信道 信道估计 插值 奇异值分解 

分 类 号：TN929.5[电子电信—通信与信息系统] TP301.6[电子电信—信息与通信工程]