BDS MEOSAR接收机的设计与实现

Design and implementation of BDS MEOSAR receiver

为了改进我国中轨道卫星搜救信号的接收设备不足的现状,以及进一步满足地面系统工程建设的测试验证需求,设计出北斗卫星导航系统(BDS)中轨道卫星搜救信号接收机,通过数据采集模块、信号检测模块、载波同步模块以及霍拉里斯(BCH)译码模块等共同实现搜救信号的接收处理。实验结果表明,该接收机可成功检测到中轨道卫星搜救信号,完成捕获跟踪并解调出有效信息实现定位。

In order to make up for the shortage of signal receiving equipment for MEOSAR of China,and further study to meet the verification requirements for ground system engineering construction,the paper designed the BDS MEOSAR signal receiver,which realizes the receiving and processing of search and rescue signals by combing the modules of data acquisition,signal detection,carrier synchronization and BCH decoding.Experimental result showed that the proposed the method could successfully detect the medium orbit satellite search and rescue signals,complete the acquisition and tracking,and demodulate the effective information to achieve positioning.