一种衰落信道下MFSK信号符号速率估计算法  

Symbol Rate Estimation Algorithm for MFSK Signal on Condition of Fading Channel

作　　者：董鑫[1] 欧阳喜[1] 李斌[2] 

机构地区：[1]解放军信息工程大学信息系统工程学院,郑州450002 [2]河南工业大学图书馆,郑州450002

出　　处：《数据采集与处理》2015年第5期1121-1130,共10页Journal of Data Acquisition and Processing

基　　金：国防基金资助项目

摘　　要：在短波通信中,MFSK是一种常见的调制方式,其符号速率估计对非合作接收方有重要意义,而短波信道干扰常对符号率估计造成影响。本文通过分析信道干扰对信号传输的影响,提出一种衰落信道下MFSK信号符号速率估计算法,该算法通过小波脊线提取、小波脊线滤波、过零点间隔聚类等方法,能有效地克服短波信道中多径效应和多普勒频移对符号速率估计的影响。仿真实验结果表明,本文算法在低信噪比、加入多普勒频移和多径效应等信道条件下仍具有较高的估计精度,可用于实际工程。In high frequency（HF）communication,M-ary frequency-shift keying（MFSK）is a common modulation mode.The symbol rate estimation of MFSK signal is meaningful for the non-cooperation receiving.According to the analysis of channel disturbance effect on signals,an algorithm is proposed to estimate the symbol rate of MFSK signal.By means of extracting and filtering wavelet bridge,clustering the distance of zero-crossing,the effect of multi-path and Doppler phenomenon in the symbol rate estimation can be overcome.Simulation experiments show that the algorithm can reach a good accuracy degree when the channel is in low SNR and contains the multi-path and Doppler effect.And it can be used for practical engineering.

关 键 词：多进制频移键控 短波 符号速率 多径效应 多普勒频移 

分 类 号：TN911.7[电子电信—通信与信息系统]