北京航空航天大学学报 ›› 2000, Vol. 26 ›› Issue (2): 145-148.

• 论文 • 上一篇    下一篇

遥测系统中的改进型AMI码

杨东凯, 韦克平, 张其善   

  1. 北京航空航天大学 电子工程系
  • 收稿日期:1998-10-22 出版日期:2000-02-29 发布日期:2010-09-27
  • 作者简介:杨东凯(1972-),男,山东莱芜人,博士生,100083,北京.

Improved AMI Code Used in Telemetry System

AMI Code, YANG Dong-kai, WEI Ke-ping, ZHANG Qi-shan   

  1. Beijing University of Aeronautics and Astronautics,Dept. of Electronic Engineering
  • Received:1998-10-22 Online:2000-02-29 Published:2010-09-27

摘要: 提出了一种适于遥测系统中使用的改进型AMI码.该码型利用在二进制数据流中间插入冗余,使码型中不再出现长连零的方法实现,从而达到快速可靠捕获同步码的目的.分析了其特性,包括编码效率、误码特性、功率谱、帧同步一次通过捕获特性等.该码型具有和原始AMI码类似的功率谱,尽管其编码效率不高,其快速同步捕获的特性可以避免数据的丢失,提高了数据的可靠性.给出了改进型AMI码的具体实现方法.

Abstract: An improved AMI code being suitable for telemetry system is proposed. It is realized through inserting redundancy Bit into the binary data stream to be synchronized rapidly and steadily. It has no long continuous zeroes. Its properties are analyzed, such as code efficiency, error Bit rate, power spectrum, the acquisition probability of the first frame marker. This type of code has the similar power spectrum to the original AMI code, and though its code efficiency decreases, rapid synchronization will avoid losing data and increase the credibility of data. In addition, the implementation of this code is described in detail.

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