CAJ | 학술논문

基于二级驻留搜索策略提出了一种最优PN码捕获门限的设计方法,并分析了其主要性能。根据Gini指标进行门限值的设置。此门限设置采用最小决策树的思想,对数据进行分类学习,在获得最小Gini指标时的划分点即是最优捕获门限。此方法的最大优势是在较短的驻留时间内提高捕获概率。理论分析和仿真结果表明：此方法在获得最优捕获门限的同时,可获得最小捕获时间。
기우이급주류수색책략제출료일충최우PN마포획문한적설계방법,병분석료기주요성능。근거Gini지표진행문한치적설치。차문한설치채용최소결책수적사상,대수거진행분류학습,재획득최소Gini지표시적화분점즉시최우포획문한。차방법적최대우세시재교단적주류시간내제고포획개솔。이론분석화방진결과표명：차방법재획득최우포획문한적동시,가획득최소포획시간。
An acquisition of pseudo-noise(PN) sequences using double threshold decision is present- ed. Its performance based on double dwell acquisition is analyzed. The best acquisition threshold is gained when the Gini index is minimum and the minimal acquisition time is got, which is proved by theoretical analysis and computer simulations.