摘要
高性能稳健性的GPS卫星接收机仍然是当前研究和发展的热点。在高动态条件下,GNSS接收机设计总是涉及到跟踪动态性能所要求的环路带宽和噪声所要求的环路带宽一对矛盾体。以微惯性测量单元(MIMU)辅助的GPS接收机为实例,设计了MIMU辅助的GPS接收机搜索算法和跟踪算法,同时为减少GPS接收机对惯性器件的性能的依赖,设计了基于MIMU辅助的最优GPS接收机的环路带宽。通过仿真和车载试验对所设计的方法进行验证,仿真和试验结果表明,MIMU辅助的GPS接收机动态性能取决于MIMU的性能指标和环路的带宽,而抗干扰性能至少有13 dB的提高;跑车试验中,商用GPS接收机和研制的GPS接收机精度大体相当。同时系统还能够提供姿态角信息。
Research and development continues to extend the capabilities and to increase the robustness of GPS receivers. In the high dynamic situation, the design of GPS receiver always involves the opposition between loop bandwidth for the noise and bandwidth for the dynamic performance. The acquisition and tracking loop of GPS receiver using MEMS IMU （MIMU） aided measurements was designed, according to the sample of MIMU aided GPS receiver. At the same time, in order to reduce GPS receiver to rely on the requirements of MIMU, the optimal bandwidth of the MIMU aided GPS receiver was designed. Using simulation and low dynamic vehicle tests, the designed algorithm was validated. The simulation and test results show that anti-jamming performance of MIMU aided GPS receiver has 13 dB improvement. On the dynamic condition, the accuracy of the designed GPS receiver is almost as same as that of commercial GPS receiver. And GPS receiver aided by MIMU can also provide the information of attitude.
出处
《测绘学报》
EI
CSCD
北大核心
2008年第1期128-134,共7页
Acta Geodaetica et Cartographica Sinica
