基于群周期相位比对的GPS载波相位测量方法  

GPS carrier phase measurement method based on group-period phase comparison

作　　者：杜保强[1] 刘丹[1] 王延峰[1] 曹玲芝[1] 周渭[1,2] 

机构地区：[1]郑州轻工业学院电气信息工程学院,郑州450002 [2]西安电子科技大学信息处理研究所,西安710071

出　　处：《仪器仪表学报》2013年第5期1086-1092,共7页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(60772135);河南省基础与前沿技术研究基金(122300410169);中国科学院精密导航定位与定时技术重点实验室开放基金(2012PNTT01);中国博士后科学基金(2011M501446;2012T50738);郑州市重点科技攻关项目基金(121PZDGG245);郑州轻工业学院博士基金(2011BSJJ031);郑州轻工业学院科研基金(2012XJJ009)资助项目

摘　　要：GPS载波相位测量是当前国际时频测量与传递领域的研究热点。针对高精度时间传输及精密导航定位的需求,提出了一种基于群周期相位比对的GPS载波相位测量方法。利用L1和L2波段的稳定性特征,引入高分辨率异频相位处理思想,通过分析两载波信号之间固有的频率或相位关系,将群周期相位比对理论应用于GPS载波相位测量中,结合高精度异频相位检测方法,实现星地之间的精密测距及准确定位。实验结果证明了该方法的合理性和科学性,与传统的载波相位测量方法相比,提高了整周模糊度的解算精度,消除了数学模型的误差来源,降低了成本,简化了电路结构,提高了定位精度。该方法将为高精度时频传递与导航定位等高科技领域提供相位处理及时间同步方面的理论指导和技术支持,具有广阔的应用前景。GPS carrier phase measurement is a hot research spot in current international time-frequency measurement and transmission field. Aiming at the requirement of high-precision time transfer and precise navigation positioning, and the problems of difficult measurement and uncertain precision of high frequency in time and frequency measurement domain,a GPS carrier phase measurement method is proposed based on group period phase comparison. Using the stability character- istics of L1 and/,2 bands,the high-resolution different frequency phase processing idea is introduced ;and through analyzing the frequency or phase relations between two carrier signals, the group period phase comparison theory is applied in the GPS carrier phase measurement ;and combining high-precision different frequency phase detection method,the precise dis- tance measurement and accurate positioning between the satellite and earth are accomplished. Experimental results prove the rationality and scientificity of the method. Compared with traditional GPS carrier phase measurement method,the pro- posed method improves the calculation precision of whole cycle ambiguity,eliminates the error source of the mathematical model ,reduces the cost, simplifies the circuit structure and improves the positioning accuracy. The method may provide the key theoretical guidance and technical support in phase processing and time synchronization for time-frequency transmis- sion and navigation positioning and other high-teeh fields, and has a broad application prospect.

关 键 词：GPS载波相位 整体模糊度 群周期 异频相位比对 相位差测量 

分 类 号：TM935.12[电气工程—电力电子与电力传动]