BDS/GPS双系统软件接收机实现与性能分析  

Implementation and Performance of BDS/GPS Dual-System Software Receiver

作　　者：宋玉龙[1] 廉保旺[1] 宋佳驹 

机构地区：[1]西北工业大学电子信息学院,陕西西安710072

出　　处：《西北工业大学学报》2016年第4期656-662,共7页Journal of Northwestern Polytechnical University

基　　金：国家自然科学基金(61301094);陕西省科技统筹创新工程重点实验室项目(2013SZS15-K01)资助

摘　　要：在经典的MATLAB GPS软件接收机的基础上,针对快速比特跳变的BDS信号给出了捕获跟踪和解帧策略,提出了BDS/GPS双系统伪距、载波相位、多普勒和载噪比观测量提取算法,推导了双系统定位定速的迭代式。采用NSL-STEREO射频前端采集实际的BDS B1和GPS L1双系统数字中频信号,设计了楼顶静态和动态实验,比较分析了实际场景下BDS/GPS双系统及各单系统的定位轨迹、定位定速误差和精度因子,验证了接收机性能并得到系统差异结论。On the basis of the classical MATLAB GPS software receiver, an acquisition/tracking and frame deco-ding strategy is present for BDS signal with rapid sign transitions. What’ s more, an observations extraction algo-rithm for BDS/GPS dual-system is proposed, including pseudo-range, carrier phase, doppler and carrier-to-noise-ratio. After that, the derivatives of dual-system position and velocity iterative equations are given. The NSL-STEREO front-end is employed to grab real intermediate frequency signal containing BDS B1 and GPS L1 parts, and a static and a dynamic experiment on the roof are designed. The ground tracks, position/velocity errors and di-lution of precisions of BDS/GPS dual-system and each single system are compared and analyzed. The results vali-date the performance of the software receiver, and indicate the difference between systems.

关 键 词：MATLAB BDS GPS 双系统 软件接收机 观测量 射频前端 设计实验 

分 类 号：TN967.1[电子电信—信号与信息处理]