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存贮响应FIR数字滤波器(FIR-SRDF),是一种用只读存贮器(ROM)直接存贮每个输入样值响应数据的数字网络。本文运用分布算法简述该滤波器的原理;详细讨论当输入为1比特二元码序列时FIR-SRDF的硬件实现。特别在码元速率较低的情况下,采用本文给出的“分段插值存贮’技术实现FIR-SRDF,结构简单,信号质量好。因此,非常适用于在窄带数字传输系统中作信号形成滤波器(或预调滤波器)。文中给出了该滤波器在平滑调频(TFM)数字调制系统中的应用实例。
The FIR digital filter (FIR-SRDF) is a digital network that stores the response data of each input sample directly using read-only memory (ROM). In this paper, the distribution algorithm is used to describe the principle of the filter. The hardware implementation of the FIR-SRDF when the input is a 1-bit binary code sequence is discussed in detail. Especially when the symbol rate is low, FIR-SRDF is realized by using the “Partition Interpolation and Storage” technology presented in this paper, which has the advantages of simple structure and good signal quality, so it is very suitable for signal formation in narrowband digital transmission system Filter (or pre-filter) .The application example of this filter in TFM digital modulation system is given in this paper.