小波变换消除储粮害虫声信号噪声的研究

Wavelet transform for denoising of acoustical signals of pests in stored grain

以小波变换为理论基础,研究有效消除储粮害虫声信号中噪声的方法.根据信号和噪声在小波变换下表现出截然不同的特性,实现信号与噪声的分离.理论分析和实验表明,该方法在获得信噪比增益的同时,能保持对信号突变信息的良好分辨.

Based on the wavelet analysis theory to denoise. This method can validly separate the noises in the acoustical signals of pests in stored grain. Based on the different properties of signals and noises with WT, they can be separated. The theory analysis and experiment results show that this method can gain a high signaltonoise ratio and increase resolutions of the signal. 