摘要
针对硬件帧同步器解码可能丢失整帧数据这一问题 ,提出一种软件解码方法 ,并对实时处理的可行性进行了分析。首先将接收到的PCM数据流进行位同步 ,然后经过一双口RAM作为缓冲 ,直接送入微机进行实时帧同步码粗同步。在所有遥测数据都接收完之后 ,利用模糊算法和最优选择实现帧同步码精确同步 ,从而得到不丢失帧的遥测解码数据。该软件用VC6 .0得到了实现。
When noisy frame synchronization patterns aren't identified, telemetry data is discarded by hardware synchronizer. In order to solve the problem, a software frame synchronization algorithm is presented and the feasibility of real time processing is verified. PCM stream which has been bit blocked is sent into computer, buffered by a dual port static RAM, then it's frame blocked roughly. Fuzzy algorithm and optimal selection is used to frame block accurately after all telemetry data received. As a result, the software frame synchronization algorithm is designed to be robust. The software is realized in VC6.0.
出处
《上海航天》
2000年第3期49-53,共5页
Aerospace Shanghai
关键词
帧同步码
实时处理
遥测数据处理
容错解码
Telemetry data
Decoding
Frame synchronization patterns
Real time processing
