一种基于平面不等式约束法的北斗三频数据组合选取方法

摘要

GNSS现代化的标志之一是三频或多频数据的广泛使用,文中在研究北斗三频数据组合原理、优化选取准则的基础上,推导出一种基于平面不等式约束法的三频数据组合选取方法.该方法将长波长条件转化为组合系数的线性关系,将弱电离层条件转化为平面域,将低噪声条件转化为椭圆域,依此建立模型并给出模型的几何解释,最后应用该方法选取特性较优的北斗三频数据组合,并总结了一些组合系数的特点.结果证明,该方法组合系数选取效率大于枚举法等常规方法,从而为多频数据组合理论的研究提供参考.%One symbol of GNSS modernization is the widespread use of triple-frequency or multi-frequency data .The paper proposes a method based on planar inequality constraints triple-frequency data selection method with the study of BeiDou triple-frequency data combination principle and optimization selection criterion .In this paper , the long wavelength condition is transformed into the linear relationship of combination coefficients ,the week ionosphere condition is conversed into surface domain ,and low noise condition is changed into elliptic domain .The model is established ,and geometric interpretation of the model is given . Finally it selects BeiDou triple-frequency data combination with better characteristic according to this method and summarizes some characteristics of combination coefficient .The results prove that selection efficiency of this method is better than conventional methods such as enumeration method . Thus this method provides some reference for the research of multi-frequency data combination theory .