摘要
平滑伪Wigner-Ville分布可以用来提取频率编码信号调制特征,但在低信噪比条件下,提取信号调制特征准确率不高。小波去噪是降低信号噪声的有力工具,但对FSK信号有其局限性。本文对小波去噪的算法进行改进,提出"子脉冲"去噪,然后结合信号的SPWVD提取信号的调制特征,仿真表明,在同等低信噪比条件下该方法更有效。
SPWVD is an important tool to extract the in-pulse features of digital communication signal, but in low SNR the veracity is small. Wavelet can denoise the signal, but it is disabled to FSK. In this case the ＂sub-pulse＂ denoise is put forward . The collection of it and SPWVD is used to extract the in-pulse features of digital communication signal. proves the feasibility of this method. The result of the emulation experiments approves the feasibility of this method.
出处
《电子信息对抗技术》
2008年第4期8-11,21,共5页
Electronic Information Warfare Technology
