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 An improved AMI code suitable for telemetry system is proposed.It uses the method of inserting redundancy in the middle of the binary data stream so as to avoid the long continuous zero in the code pattern so as to achieve fast and reliable acquisition of the synchronization code .It analyzes its characteristics, including coding efficiency, error characteristics, power spectrum, frame synchronization one-pass acquisition characteristics, etc. The pattern has a similar power spectrum as the original AMI code, although its coding efficiency is not high, its fast synchronization The captured characteristics can avoid the loss of data and improve the reliability of the data.An improved implementation of the AMI code is given