针对塔康天线频偏对方位估计精度的不良影响, 首先分析了从频域估计塔康天线频偏的困难性, 然后对已有的频偏搜索算法进行了改进, 增强了该算法的工程实用性。最后, 从时域出发提出了一种基于高斯-牛顿迭代的塔康天线频偏估计算法, 并给出了迭代初值的选取方法, 保证了算法的收敛性, 实现了频偏的快速估计。仿真结果表明, 该算法具有较好的估计精度, 可用于塔康天线频偏的监测。

Aiming at the influence of deviations in the beacon antenna rotating frequency on accuracy of TACAN signal azimuth estimation, analysis is made to the difficulty of estimating TACAN antenna frequency deviation in frequency domain at first. Then, a method is proposed which can enhance the practicability of existing TACAN antenna frequency estimation algorithm. Finally, a TACAN antenna frequency estimation algorithm based on Gauss-Newton iteration is proposed from the view of time domain, and the method for selecting the initial value of iteration is given, which can guarantee the convergence of the algorithm. This algorithm can realize the real-time estimation of frequency deviation. The simulation results show that the algorithm has high estimation precision and can be used for real-time monitoring of TACAN antenna frequency deviation.