摘要
介绍了一种遥测PCM码流解码系统的设计,系统能把接收到的±2.5 V PCM码流和422PCM码流还原出原始数据信息,按照帧结构分路存储。422码流解码的关键是串并的转换,±2.5 VPCM码流解码的关键是码同步和帧同步的实现。给出了PCM解码系统硬件电路的设计,并分别介绍了422方式和±2.5 V方式的PCM码流的解调办法。该电路设计已用于某遥测系统的地面测试台,具有工作稳定,抗干扰能力强的特点。
The design of decoding circuit for PCM telemetry signal is introduced in the paper. The system accomplished the mission of decoding high - Speed difference PCM signal received,and recording data by frame. The key to the module of 422 is how to implement serial -parallei data conversion, And The key to the module of ±2.5 V is how to achieve code - synchronization and frame- synchronization. The choice and analysis of parts of an apparatus are recommended. The circuit has applied in one test platform successfully,it has merits of stabilization and anti- iamming.
出处
《现代电子技术》
2008年第15期135-136,139,共3页
Modern Electronics Technique
关键词
PCM解码
帧同步
码同步
串并转换
PCM decoding
frame - synchronization
code - synchronization
serial - parallel conversion
作者简介
闫晓燕 女，1977年出生，山西交城人，中北大学电子与计算机科学技术学院。研究方向为测试计量技术及仪器。
