高动态BDS接收机测速精度分析及改进措施  

Analysis and Improvement of Velocity Determination Accuracy of High Dynamic BDS Receiver

作　　者：刘盟超[1,2] 赵丙风 韩帅 

机构地区：[1]卫星导航系统与装备技术国家重点实验室,河北石家庄050081 [2]中国电子科技集团公司第五十四研究所,河北石家庄050081 [3]中华通信系统有限公司河北分公司,河北石家庄050081

出　　处：《无线电工程》2017年第7期42-46,共5页Radio Engineering

基　　金：国家重点研发计划课题基金资助项目(2016YFB0502402)

摘　　要：基于高动态BDS接收机高精度测速的需求,介绍了实现接收机速度测量的多普勒获取方法,分析了高动态应用下的多普勒精度,将加加速度动态下载波环路带宽和观测量更新频率对多普勒误差的影响进行了仿真,提出了通过增加环路带宽和提高观测量更新频率来改善加加速度应力下的测速偏差的方法。应用自研的高动态BDS接收机,对速度、加速度和加加速度3种动态应力下的测速精度进行了测试验证。结果表明,BDS接收机能够在10 000 m/s速度、100 g加速度动态下实现0.05 m/s的测速精度,改善后在50 g/s加加速度动态下可实现0.2 m/s的测速精度。Based on the requirement of high accuracy velocity determination, the Doppler acquisition method for high dynamic BDS receiver velocity determination is introduced, and the Doppler accuracy in high dynamic application is analyzed. The influence of carrier loop bandwidth and observation frequency on Doppler error is analyzed. The velocity determination deviation under jerk is improved by increasing the loop bandwidth and updating the observation frequency. The accuracies of velocity determination under dynamic stresses of velocity, acceleration and jerk are tested by a self-developed high dynamic BDS receiver. The results show that the velocity determination accuracy of BDS receiver can be 0.05 m /s under 10 000 m /s velocity and 100 g acceleration, and 0.2 m /s under 50 g/s jerk after improvement.

关 键 词：高动态 测速 加加速度 北斗卫星导航系统 

分 类 号：P228.4[天文地球—大地测量学与测量工程]