摘要
毫米波雷达的回波信号去噪系统以DSP芯片为核心,辅以数模转换及控制部分,包括与PC机的通信,用DSP实现主要的去噪算法.由于回波信号是非平稳的,传统的傅氏变换去噪效果不好,所以采用一种小波均衡阈值法对其去噪.实验结果表明,信噪比及最小均方误差均得到改善.
Denoising system of MMW radar echo signal uses the DSP chip as core part, assisted with A/D transform, control unit in conjunction with communication with PC and. Since echo signal is unstable, the denoising effect of traditional Fourier transformation is not good. This paper adopts a denoising method with wavelet trimming threshold. The result indicates that the new denoising system the SNR and reduces the least mean-square error improves.
出处
《应用科技》
CAS
2006年第4期16-17,26,共3页
Applied Science and Technology
关键词
小波去噪
均衡阈值
DSP
wavelet denoising
trimming threshold
DSP
