用高速DSP实现长阶数横向滤波器

The fast realization of general transversal filters

涉及到广泛用途的横向滤波器通常使用专用数字信号处理器 (DSP)实现。根据时频域变换求线性卷积的原理 ,基于高性能的通用并行浮点数字信号处理器的 FFT处理能力以及大容量片内存贮器和并行结构 ,研究了在不同采样频率、不同滤波器长度情况下用通用 DSP取代专用 DSP的方法 ,表明这种处理方式可以大大缩小系统体积 ,并提高自适应滤波器的性能。

Specific purpose digital signal processors are utilized in the widely used transversal filters.Based on high performance in FFT computation and large on chip memory of advanced general purpose DSP,according to the principle of resolving linear convolution in frequency domain,this paper considers the feasibility of using general purpose DSP in transversal filters instead of specific DSP under the different circumstance of sample rate and filter length.It is pointed out that general purpose DSP is superior in system volume and filter performance.