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本文提出了一种直接处理增量调制编码信号的数字滤波器的新结构。该滤波器是由几个基本滤波节与一个补偿级级联而成,而基本滤波节主要由延迟部件和一个DDA(数字微分分析器-Digital Differential Analyzer)积分器组成。这种新结构取消了乘法器,比常规的PCM横向数字滤波器结构简单,处理速度高,因而它特別适合数字信号的高速处理。
In this paper, a new structure of a digital filter that directly processes an incremental modulation coded signal is proposed. The filter is composed of several basic filter sections and a compensation stage cascaded. The basic filter section is mainly composed of a delay unit and a DDA (Digital Differential Analyzer) integrator. This new structure eliminates the multiplier and is simpler and faster to handle than conventional PCM transversal digital filters, making it ideal for high-speed digital signal processing.