摘要
介绍了一种求解单频GPS载波相位整周模糊度的改进算法.通过Tikhonov正则化,减弱GPS快速定位中少数历元情形下法矩阵的病态性,得到更接近整周模糊度准确值的浮点解.然后对整周模糊度的方差协方差阵白化滤波,减弱短时间内双差整周模糊度之间的相关性,取整后得到整周模糊度的固定解.并结合一个实例与白化滤波、Lambda方法和白化滤波+Lambda方法进行对比,验证改进方法的效果.
In this paper, an improved algorithm for integer ambiguity resolution of single frequency GPS receivers is introduced. In the new method, the ill-being of the normal matrix in the fewer observation epochs in GPS rapid positioning is mitigated by Tikhonov regularization in order to obtain more accurate float ambiguity solutions. Then, whitening filter algorithm is used to process the variance-covariance matrix of integer ambiguity to de-correlate the double-difference ambiguities. Then the fixed ambiguity solutions can be obtained by rounding the float. A numerical example is given to illustrate the efficiency of the new method in contrast with whitening filter, Lambda, and whitening filter plus Lambda.
出处
《五邑大学学报（自然科学版）》
CAS
2007年第4期21-25,共5页
Journal of Wuyi University(Natural Science Edition)
关键词
GPS
整周模糊度
正则化
白化滤波
GPS
integer ambiguity
regularization
whitening filter
