基于RCB与锁相环的跟踪鉴别测向方法

为了弥补阵列天线导向矢量失配和相位测量噪声对测向性能的影响,提出一种基于稳健capon波束形成技术(robust capon beamforming,RCB)和锁相环的矢量最优估计与跟踪鉴别测向方法。首先基于RCB与锁相环原理，对目标来波信号导向矢量进行最优估计与跟踪测量;然后在稳定、准确跟踪导向矢量的基础上,借鉴扩频接收机伪码鉴相原理确定来波信号方向。仿真分析表明,该方法能够弥补阵列流型失配和相位噪声的影响、突破角度相关间隔的限制,准确测量来波信号的方向。

Tracking and discriminating direction finding method based on robust capon beamforming and phase locked loop

In order to compensate the impact of the antenna array steering vector mismatch and the phase measurement noise, the optimal measurement method is proposed for steering vector, and the tracking identification method of direction finding is designed, basing on the robust capon beamforming (RCB) and phase locked loop. Firstly, using the RCB algorithm estimate the optimal signal steering vector, and then basing on the principle of phase locked loop to closed loop track target signal steering vector. After steady and accurate tracking of the steering vectors, referencing the principle of spread spectrum receiver pseudo code phase detector, the direction of the target signal is determined. Simulation results show that the proposed method can compensate the impact of the steering vector mismatch and phase measurement noise, break through the restrictions of the angle correlation interval, and accurate measure the target signal direction.