塔康方位与扫描频率一体化精确估计算法

姜力茹; 张斌; 曾定坤; 张博

doi:10.15892/j.cnki.djzdxb.2015.05.036

2015 , Vol. 35 >Issue 5: 155 - 158,164

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2015.05.036

摘要

针对塔康信标天线旋转频率存在偏差而使方位估计性能降低的问题,提出采用二阶泰勒展开估计扫描频率,利用估计后频率进行方位解算,提高了估计精度,但该算法受噪声影响较大。针对存在的问题,给出了基于频偏二次曲线拟合的方位估计方法。仿真结果显示,采用二次曲线拟合估计频偏受噪声影响较小,方位估计误差明显小于直接估计,且该算法估计性能稳定,易于工程实现。

关键词： 塔康信号; 泰勒展开; 频偏估计; 二次曲线拟合; 方位解算

本文引用格式

姜力茹 , 张斌 , 曾定坤 , 张博 . 塔康方位与扫描频率一体化精确估计算法[J]. 弹箭与制导学报, 2015 , 35(5) : 155 -158,164 . DOI: 10.15892/j.cnki.djzdxb.2015.05.036

Abstract

A TACAN frequency estimation algorithm based on Taylor expansion was proposed for the azimuth estimation performance problems caused by deviations in beacon antenna rotating frequency, which greatly improved estimation precision, but this algorithm was greatly influenced by noise. The azimuth estimation method based on frequency offset of quadratic curve fitting was proposed for the existing problem. The results show that the azimuth estimation error decreased by using the quadratic curve fitting and the influence caused by noise was small. The algorithm could achieve high-precision calculation of TACAN azimuth, and the method is stable and accessible for engineering realization.

Key words： TACAN signal; Taylor expansion; frequency offset estimation; quadratic curve fitting; azimuth calculation

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