鱼雷引信目标信号的小波消噪研究

鱼雷引信目标信号的背景噪声消除是确保引信可靠动作的重要手段。传统的带通滤波方法消噪精度低，波形稳定性差，而小波变换在对信号进行消噪处理方面具有良好的特性，它可利用不同的尺度参数将信号分解到不同的频带上。该文基于典型的鱼雷电磁引信模型和磁引信目标信号模型，采用小波变换的方法对复杂背景干扰下的引信目标信号进行了消噪处理，并使用数学分析软件MATLAB对消噪结果进行了仿真。仿真结果表明，相比传统的消噪手段，小波消噪具有精度高、适用性强、信号波形失真度小的优点，可有效消除鱼雷引信目标信号中的背景噪声。

Wavelet Denoising of Torpedo Fuze Target Signal

The denoising of torpedo fuze target signal is important for fuze reliable action. The conventional band pass filter has a low denoising precision and a poor waveform stability, whilst wavelet transform has a good feature in the denoising of a signal via decomposing a signal into different frequency bands with different scale parameters. Based on the typical models of torpedo e- lectromagnetic fuze and magnetic fuze target signal, the wavelet denoising of the fuze target signal under a complex background noise is conducted by using wavelet transform, and a simulation of the denoising results with MATLAB is performed. The simu- lation graphs show that the wavelet denoising method has high precision, good adaptability and small waveform distortion compared with the conventional denoising means, so it is effective for eliminating background noises in torpedo fuze target signal.