唐检测器的驻留时间及检测性能分析  

Analysis on resident time and detection performance of tong detector

作　　者：李思超[1] 叶甜春[1] 徐建华[2] 

机构地区：[1]中国科学院微电子研究所,北京100029 [2]杭州中科微电子有限公司,杭州310053

出　　处：《电子测量技术》2009年第3期53-55,共3页Electronic Measurement Technology

摘　　要：GPS接收机系统中的搜索检测器对信号的快速可靠捕获有着十分重要的影响。唐检测器计算量适中,在低信噪比下性能优越,受到了广泛关注。本文首先推导了唐检测器平均驻留时间的一般公式,结果显示平均驻留时间与下行计数器值成正比。其次,本文分析和仿真了唐检测器在不同上/下行计数器值下的检测性能,结果表明检测概率随上/下行计数器值的增大而增大。通过适当的设置,在虚警概率为10-6、信噪比为4 dB的条件下,检测概率可达90%。The detector is of great importance to acquiring signals fast and accurately in GPS receivers. Tong detector has a reasonable computational burden, and is excellent for detecting signals with low SNR, so it has drawn wide attention. This paper first deduces the general equation of average resident time of Tong detector, which shows that the average resident time is directly proportional to the value of down arithmometer. Secondly, the paper analyzes and simulates the detection probability under different value of up/down arithmometer, and the results reveal that detection probability increases as the value increases. When the false alarm probability is 10^-6 and snr is 4dB, the detection probability can reach 90% through proper setting.

关 键 词：唐检测器 上/下行计数器 驻留时间 N中取M检测器 

分 类 号：TN967.1[电子电信—信号与信息处理]