惯导速度辅助下GNSS高精度定位

发布时间：2018-03-27 05:07

本文选题：伪距定位精度　切入点：窄相关　出处：《中国惯性技术学报》2017年04期

【摘要】：传统的卫星导航接收机无法同时适应高动态和高精度要求。对于10g以上的加速度,高精度接收机很难达到高精度的指标,甚至基带环路失锁无法正常导航定位。针对GNSS动态条件下高精度定位需求,引入惯性/卫星深组合导航技术,在应用惯性信息辅助接收机减小基带跟踪环路带宽基础上,采用码片窄相关方法降低伪距抖动误差,提高动态条件下GNSS伪距定位精度。仿真结果表明:通过惯性信息辅助跟踪环路可实现较小跟踪环路带宽下的稳定跟踪;在此基础上,通过码片窄相关方法并提高射频前端带宽可实现定位精度的提高。对比传统的伪距定位方法,定位精度(1?)从6 m提高到3 m左右。
[Abstract]:The traditional satellite navigation receiver can not meet the requirements of high dynamic and high precision at the same time. Even the base-band loop lost lock can not be navigated normally. Aiming at the demand of high-precision positioning under the GNSS dynamic condition, the inertial / satellite deep integrated navigation technology is introduced, on the basis of using the inertial information to assist the receiver to reduce the bandwidth of the baseband tracking loop. The narrow correlation method is used to reduce the error of pseudo-range jitter and to improve the precision of pseudo-range positioning of GNSS under dynamic conditions. The simulation results show that the tracking loop with inertial information can achieve stable tracking at smaller tracking loop bandwidth. The accuracy of location can be improved by using the method of narrow correlation and increasing the bandwidth of RF front-end. Compared with the traditional pseudo-range positioning method, the positioning accuracy is 1? ) from 6 m to 3 m.
【作者单位】：天津航海仪器研究所;
【基金】：海军武器装备预研项目(302010701)
【分类号】：TN967.2

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