摘要
针对目前导航卫星应用领域中一个新的热点研究内容,利用GNSS卫星反射信号作为无源雷达进行目标探测和定位,基于GNSS-R技术进行车辆探测定位实验研究,并给出反射信号相对于直射信号的延迟时间求解方法。实验对接收到的直射信号进行处理,提取直射信号信息作为先验条件,进行反射信号的细捕获,缩小反射信号捕获的搜索范围,采用基于FFT的并行码相位捕获算法将码相位延迟时间精确到1/16码片。将实验数据与理论值进行对比分析,验证了该方法的正确性。
The reflected signal of global navigation satellite system(GNSS)is used to perform the target detection and location for the passive radar. The vehicle detection and localization experiment based on GNSS-R technology is studied. The delay time solving method of reflected signal relative to direct signal is given. The received direct signal is processed in the experiment. The direct signal information is extracted as the prior condition to carry out the fine capture of the reflected signal,so as to narrow the search range of the reflected signal capture. The FFT-based parallel code phase capture algorithm can correct the code phase delay time to 1/16 chip. The experimental data is compared with the theoretical values. The correctness of the method was verified.
出处
《现代电子技术》
北大核心
2018年第5期106-109,115,共5页
Modern Electronics Technique
基金
国家自然科学基金资助项目(61661049)~~
关键词
GNSS
车辆探测
反射信号
直射信号
相位捕获算法
相位延迟
global navigation satellite system
vehicle detection
reflected signal
direct signal
phase capture algorithm
phase delay
