摘要
提出一种利用互联网提高北斗二号接收机捕获灵敏度的方法。由于接收机所在的大概位置、星历、时间和多普勒频率等信息必须通过网络得到,相对自主北斗二号接收机,基于互联网的北斗二号接收机性能得到显著提高。从消除北斗二号卫星强信号对弱信号干扰的角度分析了影响接收机捕获灵敏度的因素,根据强信号干扰的特点,提出了消除强信号干扰的具体方法。经过实验测试,系统的捕获灵敏度得到显著提高,从28dBHz提高到21dBHz。
A method of improving the acquisition sensitivity for Compass Ⅱ receiver by using the Internet is introduced.As the data of the approximate location where the receiver,ephemeris,time and Doppler frequency to be received by network,Internet-based Compass Ⅱ receiver performance has been significantly improved.The goal of this paper is to describe a cross-correlation detection algorithm that can be used to eliminate false acquisitions.It is proved by hardware and software.After experimental tests,the acquisition sensitivity of the system is improved significantly from 28 dBHz to 21 dBHz.
出处
《现代电子技术》
2012年第5期36-38,共3页
Modern Electronics Technique
基金
陕西省教育厅专项科研计划项目(2010JK818)
关键词
互联网
北斗二号
互相关检测
FPGA
捕获灵敏度
Internet
Compass Ⅱ
cross-correlation detection
FPGA
acquisition sensitivity
