基于值域的GNSS姿态测量改进算法研究

doi:10.11959/j.issn.1000-436x.2016023

摘要/Abstract

摘要：

针对基于值域的全球卫星导航系统（GNSS, global navigation satellite system）姿态测量方法没有考虑搜索域相关性而造成初始化时间长、搜索范围大的问题，提出了一种模糊度反约束值域搜索的改进方法。首先推导了固定基线长度条件下模糊度搜索空间，然后利用较小的2个搜索空间及其与俯仰角、航向角的关系重新确立了二维搜索域组合，最后根据值域搜索在基线二次残差最小情况下确定整周模糊度。实验结果表明，该算法充分利用了搜索域的相关性信息，减小了搜索空间，并将初始化时间缩短到40 s以内。

关键词: 整周模糊度, 姿态测量, 值域, 基线约束

Abstract:

The correlation of search zone was not included in the result zone algorithm for GNSS attitude measurement, which led to extended time for initialization and oversize range for searching, then an improved algorithm in which search zone was bounded by ambiguity was proposed in the following procedures. First, search space for ambiguity with the condition of fixed baseline length was deduced. Then combination of two dimensional search zone was established by the smaller two search spaces and their relations with heading and elevation angle. Finally the integer ambiguity was de-fined on the basis of result zone search with the mini l two-order residuals of baseline. The experiment reveals that the correlative information on search zone is fully exploited and the size of search space is reduced, with time for initializa-tion reduced to less than 40 seconds.

Key words: integer ambiguity, attitude measurement, result zone, baseline constrain

李世杰,李治安,庞春雷,余永林,王勇. 基于值域的GNSS姿态测量改进算法研究[J]. 通信学报, 2016, 37(1): 192-198.

jie LIShi,an LIZhi,lei PANGChun,lin YUYong,Yong WANG. Improved algorithm based on result zone for GNSS attitude measurement[J]. Journal on Communications, 2016, 37(1): 192-198.

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参考文献 12

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模糊度	本文算法
N₁	8 388 613
N₂	6 626 615
N₃	6 626 635
N₄	8 388 609
N₅	6 626 631
N₆	6 626 617
N₇	8 388 608

算法	搜索次数	伪组合数	初始化时间/s
基于值域算法	3 280	8	146
改进算法	696	1	39

基线长度RMSE/m	俯仰角RMSE/°	航向角RMSE/°
0.001 9	0.085 7	0.054 7