首页>
外国专利>
SIGNAL SEARCH METHOD, SIGNAL SEARCH PROGRAM, SIGNAL SEARCH DEVICE, GLOBAL NAVIGATION SATELLITE SYSTEM (GNSS) SIGNAL RECEIVER, AND INFORMATION TERMINAL
SIGNAL SEARCH METHOD, SIGNAL SEARCH PROGRAM, SIGNAL SEARCH DEVICE, GLOBAL NAVIGATION SATELLITE SYSTEM (GNSS) SIGNAL RECEIVER, AND INFORMATION TERMINAL
展开▼
机译:信号搜索方法,信号搜索程序,信号搜索设备,全球导航卫星系统(GNSS)信号接收器和信息终端
展开▼
页面导航
摘要
著录项
相似文献
摘要
Whether a target GPS signal is successfully captured is determined more accurately than the conventional method. Integrated correlation values are acquired with all code phases by setting a plurality of frequencies at intervals of 1,000 Hz determined based on a code cycle of a GPS signal into a single group (S101). A peak correlation value Peak(i) that is a highest integrated correlation value with each frequency i forming the group is acquired (S102). The peak correlation values Peak(i) of the respective frequencies i are compared to each other, a highest value thereof is set to be a highest peak value Tpeak, and a peak correlation value Peak(i) that is a second highest value is set to be a highest noise value Np. If a ratio Ratio between the highest peak value Tpeak and the highest noise value Np is lower than a threshold Th, it is determined that cross-correlation occurred (S104: YES), and if the ratio Ratio is higher than the threshold Th, the highest peak value Tpeak is determined to be from the target GPS signal (S104: NO), and the GPS signal is captured (S105).
展开▼