低成本μ-blox单频多系统GNSS接收机的定位性能分析  

Positioning performance analysis of a low-cost μ-blox single-frequency multi-GNSS receiver

作　　者：龙驰宇 温强 LONG Chiyu;WEN Qiang(School of Geodesy and Geomatics,Wuhan University,Wuhan 430079,China;GNSS Research Center,Wuhan University,Wuhan 430079,China)

机构地区：[1]武汉大学测绘学院,湖北武汉430079 [2]武汉大学卫星导航定位技术研究中心,湖北武汉430079

出　　处：《全球定位系统》2019年第4期82-88,共7页Gnss World of China

基　　金：国家自然科学基金(41674033)

摘　　要：随着大众市场对高精度定位需求增加,基于低成本小型化设备的全球卫星导航系统(GNSS)高精度定位成为研究热点之一.本文以低成本多系统GNSS接收机μ-blox M8P型号为例,分析其观测数据质量,研究其伪距单点定位和单频载波相对定位的定位性能和特点,为低成本GNSS接收机高精度定位应用提供参考.实验结果表明,与测量型接收机相比,μ-blox输出GNSS观测值的载噪比略小,伪距和载波相位的测量噪声较大.静态模式下,μ-blox的单频载波相对定位(基线长度约为430 m)可以提供厘米级的定位精度;城市环境动态模式下,其单频载波相对定位可提供亚米级至米级的定位精度.信号受限环境下,GPS/GLONASS双系统能够提供更稳定的定位结果.In recent years,high precision positioning of low-cost miniaturized GNSS receiver has been a hot topic on account of the big surge of high precision positioning in mass market.In this paper,we analyse the quality of GNSS observations and evaluate the positioning performance of a new low-cost,single frequency,multi-GNSS receiverμ-blox M8P in different scenarios with different processing strategies,providing reference for high precision positioning of low-cost GNSS receiver.The experimental results show that the carrier to noise ratio of GNSS observations ofμ-blox is lower than that of geodetic receiver and the pseudorange and carrier phase noise are higher.In static mode the low-cost GNSS receiver can achieve a high performance with a precision of centimeter level from short baseline relative positioning.In dynamic urban vehicle test the low-cost GNSS receiver can provide a precision of sub-meter to meter level with short baseline relative positioning.In a signal-constrained environment,the GPS/GLONASS combined positioning can provide more stable results.

关 键 词：GNSS 单频 低成本μ-blox接收机 数据质量分析 高精度定位 

分 类 号：P228.4[天文地球—大地测量学与测量工程]