新体制GNSS信号应用性能分析

摘要

The Binary Offset Carrier ( BOC ) signals have already been an important part of Global Navigation Satellite System (GNSS)space signals.In view of this present situation,combined with the requirements of application,this paper analyzes the influence of single-sideband and double-sideband strategies on measurement accuracy of BOC signals,and presents the derivation of relationship between BOC signal orders and their measurement accuracy and hardware resource.It is concluded that the double-sideband method has better ranging accuracy but takes more hardware resource compared with the single-sideband method.This conclusion is verified at com-mon receiver hardware platform,and the results show that the double-sideband method brings higher synchronization precision with high-er requirement for hardware resource.This research results can provide design basis and optimization scheme for various GNSS receiver with new system signal processing requirement.%针对以二进制偏置载波调制（ Binary Offset Carrier， BOC）信号为代表的新体制全球卫星导航系统（ Global Navigation Satellite System， GNSS）下行信号在空间信号中所占比例逐渐增大的现状，结合应用需求，通过介绍新体制信号的常用基带同步方法，分析了单边带策略和联合边带策略对BOC信号伪距精度的影响，并对BOC信号调制阶数与其跟踪精度和基带处理资源的关系进行了推导，得出联合边带处理法比单边带处理法具有更优测距精度但需消耗更多硬件资源的结论。在通用接收机硬件平台上对上述结论进行验证，联合边带策略在获得较高同步精度的同时对硬件资源提出了更高的需求。该研究结果为各类具有新体制信号处理需求的GNSS接收机提供设计依据和优化方案。