基于頻域的低頻UWB SAR極化校準(zhǔn)
Polarimetric Calibration for Low Frequency UWB SAR Based on the Frequency Domain
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摘要: 多極化,低頻超寬帶(Ultra Wide Band, UWB)合成孔徑雷達(Synthetic Aperture Radar, SAR)是雷達技術(shù)未來發(fā)展的一個重要方向。系統(tǒng)的低頻特性,UWB特性和大處理角特性使得常規(guī)SAR極化校準(zhǔn)不再適用。該文基于多極化低頻UWB SAR頻域處理模型,考慮了極化校準(zhǔn)中定標(biāo)體的低頻超寬帶電磁散射特性的問題,給出了極化校準(zhǔn)方法。計算機仿真驗證了該方法的有效性。
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關(guān)鍵詞:
- 低頻超寬帶合成孔徑雷達;極化校準(zhǔn);電磁散射模型
Abstract: Multi-polarization, low frequency Ultra Wide Band Synthetic Aperture Radar (UWB SAR) is one of the most important aspects of the radar technology. The low frequency, UWB and large processing angle result that the polarimetric calibration for regular SAR system cannot be used. In this paper, based on the frequency-domain processing model of the multi-polarization, low frequency UWB SAR system, with the consideration of the low frequency UWB electromagnetic scattering characteristics of the calibrators, the polarimetric calibration method is proposed. The computer simulation is used to validate the method. -
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