一种适于衰落信道的ZPOFDM参数盲估计算法  

A blind ZPOFDM parameter estimation algorithm in fading channels

作　　者：崔伟亮[1] 江桦[1] 黄艳艳[1] 李剑强[1] 

机构地区：[1]解放军信息工程大学信息工程学院,河南郑州450002

出　　处：《电路与系统学报》2011年第3期25-29,24,共6页Journal of Circuits and Systems

基　　金：十一五国家重点项目(2009AA011504)

摘　　要：提出了一种基于循环累积量的ZPOFDM参数盲估计算法,完成了衰落信道下ZPOFDM包括符号周期、零前缀长度,子载波数等多个参数的估计。文章推导与分析了ZPOFDM信号二阶循环累积量表达式,指出其截面的谱线特征,给出了算法步骤,并对估计性能进行了详细讨论。实验结果表明,在频率选择性衰落信道下,较已有方法,本文算法估计特征更加稳健,对信道、噪声敏感度低,能够实现衰落信道盲接收条件下,ZPOFDM调制参数有效估计。Based on the cyclic cumulant of ZPOFDM signals,a blind parameter estimation algorithm is proposed to estimate parameters such as symbol period,zero-padding time guard interval,and subcarrier number under the environment of fading channel.According to the explicit derivation and analysis of expression for the second order cyclic cumulant of ZPOFDM signals,the spectral lines features of the profile are investigated,and the algorithm steps are given simultaneously.The estimated performance is analyzed.The experimental results sustain our theoretical analysis and indicate that the employed features lead to an efficient estimation in frequency selective channels,and proposed algorithm is insensitive to the fading channels and noise,compared with the existing algorithm.This method can be used to accomplish effective parameters estimation of ZPOFDM signals in the fading channels under non-cooperative reception conditions.

关 键 词：ZPOFDM 衰落信道 循环累积量 参数估计 

分 类 号：TN911.7[电子电信—通信与信息系统]