基于频域分割的机载冰川雷达宽波束运动补偿算法

赵博; 刘小军; 方广有

doi:10.3724/SP.J.1146.2009.00376

基于频域分割的机载冰川雷达宽波束运动补偿算法

doi: 10.3724/SP.J.1146.2009.00376

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出版历程
- 收稿日期: 2009-03-23
- 修回日期: 2010-04-30
- 刊出日期: 2010-07-19

A Wide-Beam Motion Compensation Algorithm Based on Frequency Division for Airborne Glacier Penetrating Radar System

摘要

摘要: 对于方位向宽波束的机载高分辨率冰川厚度探测雷达进行运动补偿在实际应用中具有重要意义。该文提出了一种对宽波束正下视机载冰川厚度探测雷达系统进行运动补偿的方法。使用频域分割方法把宽波束运动误差转换为窄波束误差，在对各块数据完成窄波束补偿后相干叠加得到运动补偿后的数据。该算法直接在时域对误差进行补偿，不受误差形式的限制。文中对机载冰川雷达运动误差的空变性进行了详细分析，给出了补偿算法的原理和处理流程。针对本实验室研制的VHF波段的冰川雷达系统，分别对低频和高频运动误差进行了点目标仿真，验证了该方法的有效性。
- 机载雷达; 运动补偿; 冰川厚度探测; 频域分割; 正下视
Abstract: Motion compensation is essential for wide-beam High Resolution Airborne Glacier Penetrating Radar (HRAGPR). This paper proposes a motion compensation algorithm for wide-beam airborne nadir-looking glacier penetrating radar. Based on frequency division, the wide-beam motion error is transformed to narrow beam error. The algorithm takes blocks along azimuth dimension in frequency and applies angle-variant narrow beam motion compensation in time domain. After that, all blocks are coherently added to compose the compensated data. The algorithm carries out the compensation in time domain, so it is applicable to any motion error form. This paper analyzes the spatial-variant properties of HRAGPR motion error, the principle and processing steps of the algorithm are also presented. Simulation of point target of HRAGPR with low frequency and high frequency motion error validate the effectiveness of the proposed algorithm.

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