基于时频分析的跳频信号的参数盲估计方法

Blind Parameter Estimation of FH Signals Based on Time-Frequency Analysis

采用平滑伪Wigner-Ville分布(SPWVD)来估计跳频信号载波频率,提取频率脊线,对频率脊线进行一次小波变换来估计未知跳频信号的参数,该方法可以在不需要知道跳频信号任何先验参数的情况下,估计出信号的码元速率,载波频率改变时刻。对频率编码信号的WVD,PWVD和SPWVD结果作了比较,指出了SPWVD的优点,给出了基于时频分析跳频信号参数估计的具体算法步骤,计算机仿真表明该方法是行之有效的。

WVD and RB, the c A method for estimating parameters of unknown FH signals based on Smoothed Pseudo Wavelet Transform is proposed. Using this method, the parameter of FH signals such as hanging time of carrier frequency, carrier frequencies can be estimated without knowing any prior knowledge. A comparison of WVD, PWVD, SPWVD used for analyzing FH signals is discussed at first, and the virtue of SPWVD is pointed out, then the parameters estimating algorithms are given. Simulation results demonstrate that the estimation algorithm is effective and efficient.