HJ-1C卫星实时软件帧同步算法研究与实现

基金项目:

陆地观测卫星数据全国接收站网建设项目通用及专用记录分系统项目资助课题

Research and Realization of the HJ-1C Real-time Software Frame Synchronization Algorithm

1.
(Key Laboratory of Technology in Geo-spatial Information Processing and Application System, Chinese Academy of Sciences, Beijing 100190, China)
2.
(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)

摘要: 传统软件帧同步算法在处理不包含同步字的大量连续无效数据时，效率较低，为了提高帧同步处理速度，满足HJ-1C 及后续高码率卫星实时处理要求，该文提出一种基于逆向搜索的实时软件帧同步算法，该算法通过数据分组和逆向搜索，避免了对大量连续无效数据的同步字检测，大大提高了帧同步处理速度，HJ-1C 卫星数据最大处理速度可达15445.9 Mbps。目前，该算法已成功应用于遥感卫星地面接收站HJ-1C 快视系统中。
- 卫星通信 /
- 实时处理 /
- 软件帧同步 /
- 逆向搜索 /
- HJ-1C
Abstract: Conventional software frame synchronization methods are inefficient in processing huge continuous data without synchronization words. To improve the processing speed, a real-time synchronization algorithm is proposed based on reverse searching. Satellite data are grouped and searched in the reverse direction to avoid searching for synchronization words in huge continuous invalid data; thus, the frame synchronization speed is improved enormously. The fastest processing speed is up to 15445.9 Mbps when HJ-1C data are tested. This method is presently applied to the HJ-1C quick-look system in remote sensing satellite ground stations.
- Satellite communication /
- Real-time process /
- Software frame synchronization /
- Reverse search /
- HJ-1C