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arXiv 1908.06619eess.SP
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使用稀疏MIMO阵列在24 GHz下演示3D ISAR安全成像

Demonstration of 3D ISAR Security Imaging at 24GHz with a Sparse MIMO Array

Zhanyu Zhu, Feng Xu

摘要:

利用稀疏MIMO阵列进行了24 GHz的三维ISAR安全成像实验。MIMO阵列是一个8 Tx/16 Rx线性阵列,以实现沿垂直维度的实孔径成像。它与工作在22 GHz-26 GHz的低成本FMCW收发器进行时间交换复用。提出了一种校准方法来校准MIMO阵列中的信道不平衡。实验是在人体在小车上运动的情况下进行的,利用人体的直线运动形成水平方向的逆合成孔径。为了跟踪人体的运动,三维深度相机作为辅助传感器来捕获目标的粗略位置,以辅助ISAR成像。反投影成像算法在GPU上实现,以准实时运行。最后,进行了实验与真实的人与隐藏的对象和初步的自动目标识别算法的基础上卷积神经网络的开发和评估的真实数据。

英文摘要:

A 3D ISAR security imaging experiment at 24GHz is demonstrated with a sparse MIMO array. The MIMO array is an 8Tx/16Rx linear array to achieve real-aperture imaging along the vertical dimension. It is time-switching multiplexed with a low-cost FMCW transceiver working at 22GHz-26GHz. A calibration procedure is proposed to calibrate the channel imbalance across the MIMO array. The experiment is conducted on human moving on a cart, where we take advantage of the linear motion of human to form inverse synthetic aperture along the horizontal dimension. To track the motion of human, a 3D depth camera is used as an auxiliary sensor to capture the rough position of target to aid ISAR imaging. The back projection imaging algorithm is implemented on GPU for quasi-real-time operation. Finally, experiments are conducted with real human with concealed objects and a preliminary automatic object recognition algorithm based on convolutional neural networks are developed and evaluated on real data.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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