一种低成本的DTMB系统信道估计方法  

Low Cost Full-mode Channel Estimation for DTMB System

作　　者：汪大军 胡远洲 李自强 张启晨 孟巍 陈赟[2] 曾晓洋[2] WANG Dajun;HU Yuanzhou;LI Ziqiang;ZHANG Qichen;MENG Wei;CHEN Yun;ZENG Xiaoyang(Infrastructure Management Department,Southwest Petroleum University,Cheng du 610500,China;State Key Laboratory of ASIC~System,Fudan University,Shanghai 201203,China)

机构地区：[1]西南石油大学基建处,成都610500 [2]复旦大学专用集成电路与系统国家重点实验室,上海201203

出　　处：《复旦学报（自然科学版）》2018年第4期467-471,共5页Journal of Fudan University：Natural Science

基　　金：国家自然科学基金(61774049);上海浦江人才科学基金(16PJD008);上海国际合作科学基金(16550720600)

摘　　要：本文提出了一种针对DTMB系统中的长回波信道进行全模式估计的低成本算法.无干扰的帧头(FH)采用已接收且已估计的部分帧头数据作为近似重构而得的结果.重构帧体(FB)数据是通过在帧体数据上消除帧头拖尾、增加帧体拖尾的影响和利用迭代过程来优化已估计得到的信道冲击响应(CIR)而得到的.通过应用新帧头,我们提出的方法比现有算法计算复杂度更低,同时实现的复杂度也大幅降低.仿真结果表明,在相同的误码率前提下,我们的这种低成本全模式的信道估计方法在低SNR时的性能较现有算法高1~2dB,在高信噪比时性能和现有算法相当.This paper proposed a full-mode channel estimation algorithm for Digital Terrestrial Multimedia Broadcast（DTMB）system dealing with long echo channel.The interference free frame head（FH）data are reconstructed by using part of estimated received frame head（FH）data as an approximation.We reconstruct frame body（FB）data by removing（adding）the influence of the tail of FH（FB）and apply iterative processes to refine estimated channel impulse response（CIR）.Computation complexity of proposed method outperforms existing algorithms while implement complexity is much lower.Simulation results show that our method outperforms others 1—2 dB in low SNR and performs nearly the same in high SNR.

关 键 词：低成本 全模式 DTMB系统 信道估计 复杂度 重构 

分 类 号：TN402[电子电信—微电子学与固体电子学]