采用宽窄巷结合的LAMBDA解算方法的北斗多频差分定位技术

发布时间：2018-04-04 20:48

本文选题：北斗卫星导航系统　切入点：宽窄巷结合　出处：《哈尔滨工业大学学报》2017年11期

【摘要】：目前,常用的多频整周模糊度解算方法有TCAR(Three-Carrier Ambiguity Resolution)、CIR(Cascading Integer Resolution)和LAMBDA(Least-squares Ambiguity Decorrelation Adjustment)这3种.其中TCAR和CIR方法均利用载波相位的宽巷组合易于整周模糊度解算和窄巷组合可减小噪声的特点进行整周模糊度的解算.但是它们的整周模糊度解算性能相对于LAMBDA而言较弱,而且需要预设相关矩阵.针对这一问题,本文提出一种宽窄巷结合的LAMBDA整周模糊度解算方法用于北斗多频的差分定位.该方法在采用LAMBDA算法的基础上,充分利用宽巷组合和窄巷组合的特点,通过使用宽巷组合快速有效解算出的整周模糊度来约束窄巷组合求得的整周模糊度,以达到整周模糊度的快速准确解算的目的,同时通过窄巷组合定位模型的低噪声特点实现较高的定位精度,可有效的提高北斗多频差分定位中整周模糊度的解算效率和定位解算的精度.本文通过在北京航空航天大学楼顶的实际测试数据进行验证.结果表明,采用北斗三频进行定位解算时,宽窄巷结合的LAMBDA整周模糊度解算方法能在比窄巷组合收敛时间减小一半的情况下,实现与窄巷组合相同的3mm定位精度.
[Abstract]:At present, the commonly used multi-frequency integer cycle ambiguity resolution methods are TCAR(Three-Carrier Ambiguity solution CIRascading Integer Resolution and LAMBDA(Least-squares Ambiguity Decorrelation Adjustment).The TCAR and CIR methods both use the wide-lane combination of carrier phase to solve the integer ambiguity and narrow lane combination to reduce the noise to solve the integer ambiguity.However, their integer ambiguity resolution performance is weaker than that of LAMBDA, and the presupposition correlation matrix is required.In order to solve this problem, this paper presents a LAMBDA integer ambiguity resolution method combined with wide and narrow lanes for Beidou multi-frequency differential location.On the basis of LAMBDA algorithm, this method makes full use of the characteristics of wide lane combination and narrow lane combination, and restricts the whole cycle ambiguity obtained by using wide lane combination to solve the integer ambiguity quickly and effectively.In order to achieve the goal of fast and accurate resolution of integer ambiguity, and achieve high accuracy through the low noise characteristic of narrow lane combined location model,It can effectively improve the efficiency of integer ambiguity resolution and the accuracy of location solution in Beidou multi-frequency differential positioning.This paper is verified by the actual test data on the roof of Beijing University of Aeronautics and Astronautics.The results show that when using Beidou three-frequency method, the LAMBDA integer ambiguity resolution method combined with wide and narrow roadway can achieve the same 3mm positioning accuracy as narrow roadway combination under the condition that the convergence time of narrow roadway combination is reduced by half.
【作者单位】：北京航空航天大学电子信息工程学院;北京信息科技大学信息与通信工程学院;
【基金】：国家自然科学基金(61302073)
【分类号】：TN967.1

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