BDS/GPS单频软件接收机算法研究与实现

Research on BDS/GPS Single Frequency Software Receiver Algorithm

随着卫星导航定位技术及接收机的发展,软件接收机已成为当前研究的热点之一。根据北斗卫星导航定位系统(BDS)的接口控制文档(ICD),分析了BDS B1I信号,提出了一种基于并行码相位和并行频率捕获的算法,实现了对BDS-B1I/GPS信号的捕获跟踪、导航电文解码。利用HG-SOFTGPS02采集器采集的数据进行BDS/GPS定位,验证了该算法的可行性与合理性。

According to the BeiDou Navigation Satellite System Signal in Space Interface Control Document（Beidou ICD）,we analyzed the structure of BDS B1I signal in details,proposed an improved acquisition algorithm with combination of parallel code phase search and parallel frequency search to capture BDS B1I/GPS signal and to decode the corresponding navigation message. Finally,we tested our method with a real dataset collected by HG-SOFTGPS02 on April 25,2013 in a playground,and successfully obtained positions with the decoded BDS/GPS information. The result verified the feasibility and correctness of the proposed algorithm.