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本文描述一种多抽头自适应横向滤波器的新结构。它的基本原理在于使用分布运算技术而在实现滤波器功能时不用任何乘法器。在这种结构申,N个滤波器抽头分成M个模块,每块有R个抽头。这M个模块同时操作,因而具备了高速信号处理能力。这种类型的自适应滤波器能用微处理机或晶体管—晶体管逻辑集成电路方便地实现。本文给出了一个简单的硬件试验模型,这个模型适用于采用微处理机和简单外围接口电路的8点和16点横向自适应滤波器。样机试验结果证明了用这种结构实现多抽头数字自适应滤波器的可能性。
This article describes a new structure of a multi-tap adaptive transverse filter. Its basic principle is to use distributed computing techniques without the need for any multiplier to implement filter functions. In this architecture, N filter taps are divided into M blocks, each with R taps. These M modules operate at the same time and thus have high-speed signal processing capability. This type of adaptive filter can be conveniently implemented with a microprocessor or transistor-transistor logic integrated circuit. This article presents a simple hardware test model for 8-point and 16-point horizontal adaptive filters using microprocessors and simple peripheral interface circuits. The prototype test results demonstrate the possibility of implementing a multi-tap digital adaptive filter with this architecture.