基于TOA和DOA的固定单站无源雷达跟踪方法

Tracking algorithm of fixed mono-station passive radar using TOA and DOA

单个固定观测站在被动条件下接收运动辐射源信号的到达时间(TOA)和角度(DOA)实现对其跟踪定位,由于其系统隐蔽性好、布站机动灵活受到广泛关注。针对以往利用TOA差分和DOA跟踪定位稳定性和精确度较差的情况,提出一种在辐射源已知的固定重复周期条件下对TOA取模,再结合DOA信息实现对辐射源的扩展卡尔曼定位跟踪滤波方法。仿真表明,该方法可以达到克拉美-罗下限(CRLB),具有高的定位成功概率。

For its good concealment ability and flexible station placement requirements, the passive tracking and location system by a single fixed observer receiving the signal transmitted by a moving emitter and measuring the Time Of Arrival(TOA) and Direction Of Arrival(DOA) has attracted widespread concern recently. As to the defects of unstability and poor precision of tracking algorithm using the difference of TOA and DOA, a new extended Kalman tracking method which uses the modulus operation by the known fixed repetition period of emitter signal and then combines the DOA information of emitter signal to locate the emitter is proposed. Simulation results show that this method can achieve the Cramér-Rao Lower Bound(CRLB) and high success location rate.