新的GPS自适应阵的选星方法

Novel satellite selection methods for GPS adaptive arrays

提出了2种新的自适应阵选星方法:加权GDOP准则下的自适应阵选星方法给出了自适应阵选星的性能极限;为减少计算代价,提出近似加权GDOP准则下的自适应阵选星方法。这2种自适应阵选星方法的性能均全面优于常规GPS选星方法,不但定位精度有明显提高,而且干扰环境下的卫星信号可用率从40%分别提高到60%以上和90%以上。

Two novel satellite selection methods were presented for GPS adaptive arrays： satellite selection method with weighted GDOP criterion for adaptive arrays shows the best performance, and satellite selection method with approximately weighted GDOP criterion for adaptive arrays reduces the computation burden. These two novel satellite selection methods are better than conventional GPS satellite selection methods. Not only the positioning precision is improved obviously, but also the usability of satellite signals in jamming environment increases from 40% to more than 60% and more than 90%.