摘要
在强噪声环境中检测出微弱信号的能力是接收机重要性能指标之一。为了提高接收机在强噪声环境中检测微弱信号的能力,将小波去噪算法和谐波小波滤波算法应用到接收机的数字处理部分,并使用MATLAB软件做了相应的仿真。仿真结果表明,在-30dB的信噪比下,小波去噪算法效果不理想,谐波小波滤波算法取得较好的效果,能够在强噪声环境中检测出微弱的信号。
In strong noise environment,the ability to detect weak signal performance is an important indicator of the receiver. To improve the ability, in this paper, wavelet transform de-noising algorithm and harmonic wavelet packet transform algorithm are used in digital processing module of receiver,and Matlab is used to simulate the application process. The result shows that when SNR is --30 dB,harmonic wavelet packet transform algorithm is better than the wavelet transform de-noising algorithm, which can detect the weak signal in strong noise environment.
出处
《国外电子测量技术》
2011年第4期17-19,26,共4页
Foreign Electronic Measurement Technology
基金
预研一般基金(9140A17060709DZ5103)资助项目
关键词
小波分析
谐波小波
接收机
wavelet analysis
harmonic wavelet packet
receiver
