现代电子技术2012，Vol.35Issue(5)：60-64,67,6.
一种弱信号检测新方法分析
Analysis of a new method for weak signal detection
摘要
Abstract
An approach for weak signal detection by combining wavelet transformation and frequency domain accumulation is introduced with the help of computer simulation based on Matlab. First, the performance of wavelet transformation and frequency domain accumulation for denoising are analyzed respectively. Simulation shows that wavelet transformation is not effective for lower SNR signal and frequency domain accumulation needs a longer duration of data acquisition and makes real time signal processing be poor. Based on the above analysis, two methods are combined together and a new weak signal is formed for processing weak signal. The new method proposed in this paper used frequency accumulation to improve SNR of the acquired signal data first and used wavelet to denoise the data further. The new approach can both denoise a signal efficiently and its computation load is not heavy.关键词
去噪/小波变换/频域积累/弱信号检测/生命探测/仿真Key words
denoising/wavelet transformation /frequency domain accumulation/weak signal detection/life detection/simulation分类
信息技术与安全科学引用本文复制引用
魏崇毓,李玲娟,朱卫娟..一种弱信号检测新方法分析[J].现代电子技术,2012,35(5):60-64,67,6.基金项目
国家自然科学基金资助项目(60902034) （60902034）
山东省自然科学基金资助项目(Y2007G09) （Y2007G09）
