新的GPS自适应阵的选星方法  

Novel satellite selection methods for GPS adaptive arrays

作　　者：李敏[1] 刘小汇[1] 王瑛[1] 王飞雪[1] 

机构地区：[1]国防科技大学卫星导航研发中心,湖南长沙410073

出　　处：《通信学报》2007年第6期127-132,共6页Journal on Communications

基　　金：新世纪优秀人才支持计划基金资助项目(NCET-04-0995)~~

摘　　要：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%.

关 键 词：自适应阵 全球定位系统 选星 抗干扰 几何精度因子 

分 类 号：TN973.3[电子电信—信号与信息处理]