数据采集与处理2017，Vol.32Issue(1)：182-190,9.DOI:10.16337/j.1004-9037.2017.01.022
频率选择性衰落信道下的同步参数联合盲估计算法
Blind Estimation Algorithm of Synchronization Parameters in Frequency-Selective Fading Channels
吴天琳 1彭华 1黄艳艳1
作者信息
- 1. 解放军信息工程大学信息系统工程学院,郑州,450002
- 折叠
摘要
Abstract
To realize blind estimation of synchronization parameters of linearly digitally modulated signals in multipath fading channels and low signal-to-noise ratio (SNR),a joint algorithm for the estimation of carrier frequency offset,phase offset and symbol timing error based on cyclic cumulation is proposed.The mathematical relationships of cyclic cumulation and phase offset,symbol timing error are obtained through theoretical derivation.Based on this,the carrier frequency offset is roughly estimated firstly,then the quite precise estimation is obtained from the test of certain cycle frequency.Flinally,the phase offset and symbol timing error are estimated from the value of some certain cyclic cumulation.The algorithm do not rely on the color and distribution characteristics of the fading distortion or additive noise and is quite appropriate for complex condition that frequency offset,phase offset,time error and fading exist at the same time.Experimental results demonstrate the good performance of blind estimation of synchronization parameters in frequency selective fading channels under low SNR.关键词
多径频率选择性衰落/低信噪比/同步参数/盲估计/循环累积量Key words
multipath frequency-selective fading/low signal-to-noise ratio (SNR)/synchronization parameters/blind estimation/cyclic cumulation分类
信息技术与安全科学引用本文复制引用
吴天琳,彭华,黄艳艳..频率选择性衰落信道下的同步参数联合盲估计算法[J].数据采集与处理,2017,32(1):182-190,9.
