| 星载双基地FMCW-SAR高分辨时域成像算法 |
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| 引用本文： | 王岩,杨天笑,丁泽刚,曾涛. 星载双基地FMCW-SAR高分辨时域成像算法[J]. 信号处理, 2022, 38(1): 35-42. DOI: 10.16798/j.issn.1003-0530.2022.01.005 |
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| 作者姓名： | 王岩 杨天笑 丁泽刚 曾涛 |
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| 作者单位： | 1.北京理工大学信息与电子学院雷达技术研究所，北京 100081 |
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| 基金项目： | 北京市自然科学基金(4202067);重庆市自然科学基金(cstc2020jcyj-msxmX0663);民用航天技术预研项目(D040401)。 |
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| 摘 要： | 双基地合成孔径雷达(Synthetic Aperture Radar,SAR)收发天线分置,结构灵活、功能拓展性强;调频连续波(Frequency Modulated Continuous Wave,FMCW)SAR成本低,广泛应用于空/地基SAR平台.将双基地构型与FMCW体制结合,应用于卫星平台,即构成星载双基地F...
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| 关 键 词： | 星载双基地合成孔径雷达 调频连续波 高分辨成像 时域算法 |
| 收稿时间： | 2021-03-02 |
High Resolution Time Domain Imaging Algorithm for Spaceborne Bistatic FMCW-SAR |
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| WANG Yan,YANG Tianxiao,DING Zegang,ZENG Tao. High Resolution Time Domain Imaging Algorithm for Spaceborne Bistatic FMCW-SAR[J]. Signal Processing(China), 2022, 38(1): 35-42. DOI: 10.16798/j.issn.1003-0530.2022.01.005 |
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| Authors: | WANG Yan YANG Tianxiao DING Zegang ZENG Tao |
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| Affiliation: | 1.Radar Research Lab，School of Information and Electronics，Beijing Institute Technology，Beijing 100081，China2.Chongqing Innovation Center，Beijing Institute of Technology，Chongqing 401120，China |
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| Abstract: | Bistatic Synthetic Aperture Radar （SAR） has separate transmitting and receiving antennas， which endows the system with flexible structure and strong function expansion. Frequency modulated continuous wave （FMCW）SAR is widely used in air/ground SAR platform because of its low cost. Combining bistatic configuration with FMCW system， spaceborne bistatic FMCW-SAR is applied to satellite platform， which has both the advantages above and is an optional implementation method for future small satellite SAR constellation. At present， the research on bistatic FMCW-SAR high-resolution imaging mostly focuses on the air/ground platform， while there is few research on the space-based platform. Therefore， this paper proposes a high-resolution time-domain imaging processing algorithm suitable for spaceborne bistatic FMCW-SAR system， analyzes the correlation between the distance migration curve after dechirping and the speed of load movement， and proposes a distance migration curve positioning method suitable for space-based platforms， which achieves higher processing accuracy than the traditional time-domain algorithm. The effectiveness of the proposed method has been verified by computer simulation. |
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| Keywords: | spaceborne bistatic synthetic aperture radar frequency modulated continuous wave high resolution imaging time domain algorithm |
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