摘要
城市峡谷环境的高精度定位是全球卫星导航定位系统亟待解决的重要问题之一。近年来提出的直接位置估计(Direct Position Estimation, DPE)方法是基于“导航域”实现位置的最优估计,现有研究集中于全球定位系统(Global Positioning System, GPS)信号进行分析验证,缺乏新体制信号的对比和抗多径原理分析,并且计算量过大不易实现。针对以上问题,基于北斗卫星导航系统(BDS)B1C信号,设计了一种快速DPE软件接收机,并基于城市峡谷环境下的真实信号验证了BDS B1C新体制信号DPE软件接收机的实际性能。实际试验表明,相同信号相干积分长度和卫星几何精度因子情况下,DPE接收机使用二进制偏置载波调制(Binary Offset Carrier, BOC)新体制信号相较于二进制相移键控(Binary Phase Shift Keying, BPSK)信号在城市峡谷环境下定位精度具有显著提升。
High-precision positioning in urban canyon environment is one of the important issues that need to be solved urgently in the global satellite navigation and positioning system.The direct position estimation(DPE)method proposed in recent years is the optimal estimation of position based on the“navigation domain”.Existing research focuses on the analysis and verification of Global Positioning System(GPS)signals,lacks the comparison of new system signals and the analysis of anti-multipath principles,and the calculation is too large to be implemented.To solve the above problems,a fast DPE software receiver based on BeiDou Navigation Satellite System(BDS)B1C signal is designed,and the practical performance of BDS B1C new system signal DPE software receiver based on the real signal in the urban canyon environment is verified.The experimental results show that under the same signal coherent integration length and satellite geometry accuracy factor,DPE receivers using new Binary Offset Carrier(BOC)system signals have a significant improvement in positioning accuracy in the urban canyon environment as compared to the Binary Phase Shift Keying(BPSK)signals.
作者
金天
苏雨
纪永亮
鞠易
JIN Tian;SU Yu;JI Yongliang;JU Yi(School of Electronic and Information Engineering,Beihang University,Beijing 100083,China)
出处
《无线电工程》
北大核心
2023年第5期1007-1014,共8页
Radio Engineering
基金
国家自然科学基金(62071020)。
