雷达科学与技术2013，Vol.11Issue(3)：281-284,4.DOI:10.3969/j.issn.1672-2337.2013.03.011
机载多普勒频移的递推及相移检测
Recursion and Phase Shift Detection of Airborne Doppler Shift
郁涛1
作者信息
- 1. 中国电子科技集团公司第五十一研究所,上海200233
- 折叠
摘要
Abstract
The Doppler shift at a certain position in front of the flight direction of airborne station can be directly determined by recurrence method and making use of the measurement result for phase difference at current position.Firstly,based on plane geometry,the recursion formula of Doppler shift at a virtual position in front of the flight direction of airborne station,which only uses the measured value for Doppler shift and radial distance at current position,can be derived according to the kinetic characteristic of geometric parameters while airborne platform is in uniform motion.Then,using the ranging and direction finding method based on phase difference solves the radial distance and azimuth angle including in the recursion formula and obtains the Doppler recursion formula only based on phase difference detecting.The elementary error analysis shows that the measured errors can be limited in the range from 10 to 20 Hz in the case of low flight speed,short virtual baseline length,and long wavelength of measured signal.关键词
多普勒频移/递推法/相差定位/无源定位/机载遥感Key words
Doppler shift/ recurrence method/ phase difference position/ passive location/ airborne remote sensing分类
信息技术与安全科学引用本文复制引用
郁涛..机载多普勒频移的递推及相移检测[J].雷达科学与技术,2013,11(3):281-284,4.
