用声表面波器件实现小波变换的方法

Method for Implementing Wavelet Transform by Using Surface Acoustic Wave Device

根据声表面波SAW (SurfaceAcousticWave)传播的非线性特性 ,将变换信号用的小波作为声表面波器件的脉冲响应 ,从而提出了一种用声表面波模拟硬件实现小波变换的方法 ,并成功地用特种模拟器件实现了连续二进小波的快速变换 .由于实现方法简单 ,避免了复杂的算法和昂贵的制作过程 ,对于开发小波变换的优越性和小波变换的应用有重要的价值 .同时 ,还给出了小波变换在检测信号和信号滤波方面的应用例子 。

Wavelet is fabricated as pulse response of surface acoustic wave (SAW) devices which depend on the characteristics of surface acoustic wave. Fast transform of continuous dyadic wavelet is realized successfully with special analog devices. It is valuable to exploit and apply superiority of wavelet transform because of its simplicity of implementation and averting complex algorithm and expensive fabrication process. The example of the application of wavelet transform to detect and filter signals is given.