伪卫星增强系统参考站接收机的测距偏差及优化  

Optimization on ranging deviation of reference station receivers in pseudolite augmentation system

作　　者：徐博[1] 孙广富[1] 陈华明[1] 欧钢[1] XU Bo;SUN Guangfu;CHEN Huaming;OU Gang(Satellite Navigation R&D Center,College of Electronic Science,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]国防科技大学电子科学学院卫星导航研发中心,湖南长沙410073

出　　处：《国防科技大学学报》2017年第6期177-181,共5页Journal of National University of Defense Technology

基　　金：国家自然科学基金资助项目(61403413)

摘　　要：伪卫星相对地面用户是静止的,因此卫星与参考站接收机之间的距离几乎是不变的。在这种情况下,采样和量化引入的误差不再服从高斯分布,从而影响接收机的测量精度。为了解决这一问题,建立了卫星导航接收机的离散数字信号模型,并在此基础上分析了采样和量化对测距偏差的影响,通过仿真验证了结论的正确性,并提出了伪卫星增强系统下参考站接收机的优化设计方法。The pseudo-satellite is stationary for the reference station receiver,therefore,the distance among reference station receivers is nearly kept constant.On that condition,the error caused by sampling and quantization is not Gaussian variables,which can have impact on the measurement accuracy.In order to solve the problem,the digital signal model of satellite navigation receiver was introduced,and then the effect ofsampling and quantization error on measure bias was analyzed.Simulation results are presented to support the conclusion,and the optimization of reference receiver in pseudo-satellite system is proposed in the end.

关 键 词：卫星导航 伪卫星 参考站接收机 测距偏差 

分 类 号：TN967.1[电子电信—信号与信息处理]