UWB-MIMO穿墻雷達三維成像與運動補償算法研究
doi: 10.11999/JEIT190356
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1.
中國科學院空天信息創(chuàng)新研究院 北京 100094
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2.
中國科學院大學 北京 100049
基金項目: 科技部重點研發(fā)計劃 (2017YFF0107700)，國家自然科學基金(61601438)
Study on 3D Imaging and Motion Compensation Algorithm for UWB-MIMO Through-wall Radar
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1.
Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China
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2.
University of Chinese Academy of Sciences, Beijing 100049, China
Funds: The National Key R&D Program of China(2017YFF0107700), The National Natural Science Foundation of China (61601438)
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摘要: 該文提出一種適用于超寬帶MIMO稀疏陣列的Kirchhoff遷移成像和運動補償方法。該方法將傳統(tǒng)Kirchhoff積分方程引入到MIMO陣列中，并利用后向格林函數(shù)替代前向格林函數(shù)來解決小陣列大視場的問題。另外，在通過微波開關切換分時復用的方式來采集接收單元回波數(shù)據(jù)的同時，增加1個參考通道直接采集參考單元的回波信號來估計運動目標的位置變化信息，對MIMO通道的數(shù)據(jù)進行運動補償后再進行3D成像，有效避免了因目標運動導致的散焦和成像結果偏移真實位置的問題。Abstract: A motion compensation method based on Kirchhoff migration imaging algorithm for MIMO array is proposed. In the method, the traditional Kirchhoff intergral equation is introduced into the MIMO array and the forward Green function is replaced by the backward Green function to solve the problem of the large view field of the small array. The echo signal of the reference unit is directly recieved by adding a reference channel to estimate the position change information of the moving target, while the signal of the receiving units is sampled through the microwave switch time divition multiplexing. Then 3D imaging is performed after motion compensation for the data of the MIMO channel, which avoids effectively the problem of defocusing due to target migration and the deviation of the imaging result from the real position.
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Key words:
- Through-wall radar imaging /
- Sparse array /
- Ultra-wideband /
- Motion compensation
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表 1 MIMO雷達關鍵參數(shù)
參數(shù)名稱 參數(shù)值 中心頻率 1 GHz 帶寬 1 GHz 碼型 Golay互補碼 累加次數(shù) 16 ADC位數(shù) 16 bit 等效采樣率 16 GHz 掃描率 2拍/s 
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