摘要
在介绍子波变换功率谱计算方法的基础上,提出了一种基于子波变换理论的雷达视频回波信号去噪方法,该方法首先对回波信号进行多分辨分解,确定每一尺度上的门限阈值;然后对信号进行离散子波变换,去除各尺度上低于对应门限阈值的信号成分,再利用离散子波反变换获得了去噪后的视频回波信号。利用该方法对实测雷达视频回波数据进行仿真验证,获得了较好的效果。
Based on the introduction to wavelet transform power spectrum calculation method, this paper introduces a kind of de-noise method with wavelet transform theory. Firstly the echo signal is decomposed in multi-resolution and the threshold is confirmed in every scale. Secondly the signal is transformed in discrete wavelet and the signal below the threshold is discarded. Lastly the de-noised video signal is obtained with discrete wavelet anti-transform. Real radar target echo data is processed with this method and the simulation results show that perfect effect can be obtained with this method.
出处
《辽宁工程技术大学学报（自然科学版）》
EI
CAS
北大核心
2005年第3期387-390,共4页
Journal of Liaoning Technical University (Natural Science)
基金
国家自然科学基金资助项目(60172033)
关键词
子波变换
去噪
雷达目标回波
wavelet transform
de-noise
radar target echo data
