一种基于PN序列的OFDM时域信道估计方法  

A Time-Domain OFDM Channel Estimation Algorithm Based on PN Sequence

作　　者：姜永权[1] 马逸新[1] 

机构地区：[1]汕头大学工学院电子信息工程系,广东汕头515063

出　　处：《汕头大学学报（自然科学版）》2006年第4期75-80,共6页Journal of Shantou University：Natural Science Edition

摘　　要：提出了一种基于PN序列的OFDM时域信道估计方法,在时域OFDM符号中插入PN序列作为训练序列,将其与对应的接收序列作圆周相关处理,并通过迭代逐次检测出信道各径参数,进而获得信道频率响应估计.仿真结果表明,在相同的信噪比和信道利用率条件下,提出的方法比频域梳状导频估计方法具有更高的信道估计精度.A timc-domain OFDM channel estimation algorithm is proposed based on PN sequence： PN sequence as training scqucnce is inserted into OFDM symbol in time domain; the cross-eurrclatiun between the reccivcd sequence and its corresponding PN sequence is performed and the muhipath parameters are obtained itcrativcly, then the channel frequency response can be acquired. Simulation rcsuhs show that, with the same signal-to-nuise ratio （SNR）and channel utilizing efficicncy, the proposed algorithm has bettcr precision of channel estimation.

关 键 词：无线通信 正交频分复用(OFDM) 时域信道估计 PN序列 相关处理 

分 类 号：TN925[电子电信—通信与信息系统]