摘要
对频率编码信号直接进行小波去噪难以达到提高信噪比的目的,为了有效提高频率编码信号的信噪比,提出一种新的去噪方法。对接收到的频率编码信号,首先进行奇异点的检测,根据奇异点的位置将频率编码信号划分为不同的单载频信号,然后利用小波去噪方法对单载频信号进行逐个处理,最后将去噪后的多个单载频信号按编码规律进行组合,进而达到有效去噪的目的。仿真验证了新方法有效可行。
It is hard to improve the SNR of FSK signal by direct use of wavelet de-noising. In order to improve the SNR effectively, a new method is proposed in this paper. The received FSK signal can he decomposed into several CW signals by the position of singularity point, then the CW signals are de-noised one by one. The de-noised CW signals are combinated by the coding rule to improve the SNR at last. Simulation result shows that this new method is useful.
出处
《雷达科学与技术》
2008年第3期219-221,234,共4页
Radar Science and Technology
基金
武器装备预研基金(No.9140C106090805)
关键词
频率编码信号
奇异点检测
小波去噪
信噪比
FSK signal
singularity point detection
wavelet de-noising
signal-to-noise ratio（SNR）
