摘要
本文给出了设计和实现程控数字交换机中数字多频信号接收器 DMFR 的一种新方法,详细叙述了由 FIR 数字滤波器所组成的 DMFR 的设计原理,提出了判决电平、电平比等设计参量及其确定方法.还提出采用了保护滤波器,使 DMFR 的工作更加可靠.最后介绍了使用数字信号处理器 TMS 32010实现 DMFR 的原理及框图.通过计算机模拟和组装调试,达到了设计要求,工作稳定可靠,具有实用价值.
This paper presents a new method that could be used to design and implement a digital multi-frequency signalling Receiver DMFR in stored program control digital exchange.The principle for designing DMFR by FIR digital filter is described in detail.The method to determine the two designing parameters (decision level and level ratio) is given.The guard filter is used to make more dependable.Finally the principle and block diagram for implementing DMFR with digital signal processor TMS32010 are introduced.By computer simulation、assembling and expreiment,the designing requirments are reached.The performance shows that DMFR is reliable and practicable.
出处
《北方交通大学学报》
CSCD
北大核心
1989年第1期78-83,共6页
Journal of Northern Jiaotong University
