摘要
针对低信噪比条件下雷达信号的瞬时参数估计容易受噪声影响的问题,提出了将自适应阈值消噪技术与小波变换结合起来的新方法.首先利用连续小波变换计算信号的小波谱,再对小波谱进行自适应阈值消噪处理,进而提取小波谱脊线,得到信号的脉内调制信息.计算机仿真结果验证了该方法的可行性。
Concerned with the problems of the instantaneous parameter estimation ot radar signals m low SNR, a novel method that the technique of noise-cancellation with the adaptive threshold was combined with the wavelet transform was proposed. At first the wavelet spectrum of signals was calculated by using continuum wavelet transform, then the wavelet spectrum was processed with adaptive threshold noise-cancellation, and finally the in-pulse features of radar signal was obtained by extracting the ridge of the spectrum. Simulations verifies the method to be feasible.
出处
《空军雷达学院学报》
2008年第1期15-17,21,共4页
Journal of Air Force Radar Academy
关键词
自适应阈值
雷达信号
脉内特征
小波变换
adaptive threshold
radar signals
in-pulse features
wavelet transform
