A Novel Calibration Method for Signal Leakage between Multiple Channels in Array Imaging

In this paper, the array imaging process with the presence of signal leakage between channels is derived and analyzed in short-range imaging applications. The echo wave of the system can be divided into two parts: the echo signals we expected, and the echo signal that resulted from the leaked signals. Signals leaked to the adjacent channels can lead to ghosts which can deeply deteriorate the system cross resolution. To solve this problem, a concise calibration method is proposed to remove the impacts of the signal leakages on the imaging quality. Furthermore, the results based on the simulation and the real-world data validate the effectiveness of the proposed method, which indicates that this calibration method can mostly cancel the influence of the signal leakages.

[1]  Yuliang Qin,et al.  340-GHz 3-D Imaging Radar With 4Tx-16Rx MIMO Array , 2018, IEEE Transactions on Terahertz Science and Technology.

[2]  Shiyong Li,et al.  Compressive Sensing Imaging of 3-D Object by a Holographic Algorithm , 2018, IEEE Transactions on Antennas and Propagation.

[3]  Yuliang Qin,et al.  Point Cloud and 3-D Surface Reconstruction Using Cylindrical Millimeter-Wave Holography , 2019, IEEE Transactions on Instrumentation and Measurement.

[4]  Xiang Li,et al.  A Novel Method for 3-D Millimeter-Wave Holographic Reconstruction Based on Frequency Interferometry Techniques , 2018, IEEE Transactions on Microwave Theory and Techniques.

[5]  Negar Tavassolian,et al.  Synthetic Ultra-High-Resolution Millimeter-Wave Imaging for Skin Cancer Detection , 2019, IEEE Transactions on Biomedical Engineering.

[6]  Leo P. Ligthart,et al.  A Non-Linear Correction Method for Terahertz LFMCW Radar , 2020, IEEE Access.

[7]  Xiaoming Chen,et al.  A Review of Mutual Coupling in MIMO Systems , 2018, IEEE Access.

[8]  Michael A. Jensen,et al.  The Effect of Antenna Mutual Coupling on MIMO Radar System Performance , 2019, IEEE Transactions on Antennas and Propagation.

[9]  Dong-Chan Kim,et al.  A Distributed FMCW Radar System Based on Fiber-Optic Links for Small Drone Detection , 2017, IEEE Transactions on Instrumentation and Measurement.

[10]  R. E. Kell.  On the derivation of bistatic RCS from monostatic measurements , 1965 .

[11]  R. Stolt.  MIGRATION BY FOURIER TRANSFORM , 1978 .

[12]  Jong-Won Yu,et al.  TX Leakage Canceller for Small Drone Detection Radar in 2-GHz Band , 2020, IEEE Microwave and Wireless Components Letters.

[13]  Xiang Li,et al.  Novel Efficient 3D Short-Range Imaging Algorithms for a Scanning 1D-MIMO Array , 2018, IEEE Transactions on Image Processing.

[14]  Thomas E. Hall,et al.  Three-dimensional millimeter-wave imaging for concealed weapon detection , 2001 .

[15]  Huazeng Deng,et al.  Phase Calibration of an Along-Track Interferometric FMCW SAR , 2018, IEEE Transactions on Geoscience and Remote Sensing.

[16]  Negar Tavassolian,et al.  High-Contrast, Low-Cost, 3-D Visualization of Skin Cancer Using Ultra-High-Resolution Millimeter-Wave Imaging , 2019, IEEE Transactions on Medical Imaging.