基于多普勒变化率的机载单站短基线测距方法

已有的分析表明,通过对多普勒频移变化率方程的近似处理即能实现仅基于多普勒频移测量的机载单站测距。在此基础上,本文进一步研究了在机载单站探测平台上,利用一个短基线二单元阵列实现实时测算载机与目标间径向距离的方法,其中所需解决的最主要问题是对时差值的测算。研究表明,只需将路程差看成是基线长度的投影,并等效成是在径向方向上载机以径向速度移动所产生的,即能获得可使测距结果和理论值相吻合的时差值。

An Airborne Single-Station Ranging Method with Short-Baseline Based on Doppler Changing Rate

This paper investigates the problem of airbome single-station ranging method,making use of a array of two antenna that forms a short-baseline.The key issue lies in calculating the time difference between two radial distances.An engineering solution is to reckon the path length difference as the base-line projection and make it be equated to an airbone flight distance at radial velocity in radial direction.This treatment leads to a time difference expression and a range finding equation that is identical wit...