基于数字波束形成的自动跟踪系统

针对多目标测控问题，提出了一种实用的利用基于圆阵的数字波束形成技术来实现目标跟踪的系统。在系统实际工作于噪声和干扰环境中时，为避免计算梯度时可能出现的数值突变，提出了一种修正的梯度跟踪自适应算法，可靠地实现了权值更新，并对各阵元输出进行加权合并，以获得最大信号输出，同时实现对目标方位角和俯仰角的自动捕获和跟踪，且跟踪迅速、正确、稳定。仿真结果表明了所提出的方案的正确性。

An Adaptive Tracking System Based on Digital Beamforming

A tracking system with DBF (Digital Beamforming) technology base on circular antenna array is proposed to solve the problem of simultaneous multi-target telemeter & control and the gradient algorithm is adopted to refresh the coefficients adaptively. In the scenario of noise and interferences, some numeric bursts are unavoidable in the values of the gradient, so the algorithm is modified and the constrained terms are added. Thus the system can correctly update the coefficients, combine the signals from each element effectively, and realize the adaptive tracking of both the azimuth and elevation of the target, rapidly, exactly and steadily. The simulation results show the validity of the scheme.