基于相位差变化率测量的单站定位方法

利用观测平台相对目标辐射源的运动信息,在测角基础上增加相位差变化率信息可实现对目标被动定位,但该定位方法通过相位差法测角,需要增加设备以解相位模糊.针对上述不足,提出一种三角基线只测相位差变化率的定位方法,该方法通过测量两组相位差变化率解得方位角,避免了解模糊运算.给出了测角误差、定位误差表述式,通过仿真分析了相位差变化率对测角精度、定位精度的影响.

Location method for phase difference rate of change with single-observer

An emitter can be located using DOA and new information such as phase difference rate,which is caused by relative tangential motion between emitter and observer.Eliminating ambiguity for phase difference is necessary,corrsponding equipment are more complexity.A location method using PRC only with triangle baseline is proposed.Eliminating ambiguity for phase difference is avoidable,by measuring PRC of two baseline to estimate DOA and range to locate the target.The relationship between measurement accuracy of PRC and location precision,DOA estimation precision is analyzed.