Photonics-Based High-Resolution 3D Inverse Synthetic Aperture Radar Imaging

A photonics-based radar for high-resolution 3D microwave imaging is proposed and demonstrated, in which high range resolution is achieved by employing a wideband linearly frequency modulated signal, and high cross-range resolution in both azimuth and elevation is realized by rotating the target around two orthogonal axes to compose a 2D inverse synthetic aperture. The proposed radar performs photonics-based in-phase/quadrature up-conversion and de-chirp processing in the transmitter and receiver, respectively, which features a compact structure with low-sampling-rate electronics in the receiver. An experiment is carried out. The established radar works in the $K$ -band, with bandwidth as large as 8 GHz. Captured echo signals at different rotation angles of the target are processed to a 3D image, in which the voxel values are scattering intensities at different spatial positions.

[1]  Shilong Pan,et al.  Photonics-based MIMO radar with high-resolution and fast detection capability. , 2018, Optics express.

[2]  M. Tiebout,et al.  Advanced Microwave Imaging , 2012, IEEE Microwave Magazine.

[3]  S. Xiang,et al.  Photonic Microwave Generation With Frequency Octupling Based on a DP-QPSK Modulator , 2015, IEEE Photonics Technology Letters.

[4]  Xiaoping Zheng,et al.  Photonics based microwave dynamic 3D reconstruction of moving targets. , 2018, Optics express.

[5]  S. Pan,et al.  Flexible Frequency-Hopping Microwave Generation by Dynamic Control of Optically Injected Semiconductor Laser , 2016, IEEE Photonics Journal.

[6]  Cyril Decroze,et al.  Single Channel Microwave Photonics Digital Beamforming Radar Imaging System , 2018, Journal of Lightwave Technology.

[7]  Shilong Pan,et al.  Photonics-Based Broadband Microwave Measurement , 2017, Journal of Lightwave Technology.

[8]  Arnulf Leuther,et al.  ${W}$ -Band Time-Domain Multiplexing FMCW MIMO Radar for Far-Field 3-D Imaging , 2017, IEEE Transactions on Microwave Theory and Techniques.

[9]  Kun Xu,et al.  Full-band direct-conversion receiver with enhanced port isolation and I/Q phase balance using microwave photonic I/Q mixer (Invited Paper) , 2017 .

[10]  Xing-dong Liang,et al.  Demonstration of a microwave photonic synthetic aperture radar based on photonic-assisted signal generation and stretch processing. , 2017, Optics express.

[11]  R. Raskar,et al.  Time-of-Flight Microwave Camera , 2015, Scientific Reports.

[12]  Thomas Hall,et al.  Near-field three-dimensional radar imaging techniques and applications. , 2010, Applied optics.

[13]  Robert L. Tjoelker,et al.  Ultra-Stable RF-Over-Fiber Transport in NASA Antennas, Phased Arrays and Radars , 2014, Journal of Lightwave Technology.

[14]  Daiyin Zhu,et al.  Demonstration of Ultra-high-resolution Photonics-based Kaband Inverse Synthetic Aperture Radar Imaging , 2018, 2018 Optical Fiber Communications Conference and Exposition (OFC).

[15]  J. Wo,et al.  Ka-band microwave photonic ultra-wideband imaging radar for capturing quantitative target information. , 2018, Optics express.

[16]  Caner Özdemii̇r.  Inverse Synthetic Aperture Radar Imaging and Its Basic Concepts , 2012 .

[17]  Shilong Pan,et al.  Photonics-based radar with balanced I/Q de-chirping for interference-suppressed high-resolution detection and imaging , 2019, Photonics Research.

[18]  Shilong Pan,et al.  Analysis of Photonics-Based RF Beamforming With Large Instantaneous Bandwidth , 2017, Journal of Lightwave Technology.

[19]  Shilong Pan,et al.  Image-Reject Mixer With Large Suppression of Mixing Spurs Based on a Photonic Microwave Phase Shifter , 2016, Journal of Lightwave Technology.

[20]  Francesco Amato,et al.  Photonic approach for on-board and ground radars in automotive applications , 2018 .

[21]  S. Pan,et al.  Stable fiber delivery of radio-frequency signal based on passive phase correction. , 2014, Optics letters.

[22]  Fabrizio Berizzi,et al.  A fully photonics-based coherent radar system , 2014, Nature.

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

[24]  Wei Chen,et al.  High-depth-resolution 3-dimensional radar-imaging system based on a few-cycle W-band photonic millimeter-wave pulse generator. , 2013, Optics express.

[25]  Xiaoping Zheng,et al.  Photonics-based wideband distributed coherent aperture radar system. , 2018, Optics express.

[26]  Marco Martorella,et al.  3D interferometric ISAR imaging of noncooperative targets , 2014, IEEE Transactions on Aerospace and Electronic Systems.

[27]  Daiyin Zhu,et al.  Photonics-based real-time and high-resolution ISAR imaging of non-cooperative target , 2017 .

[28]  Moshe Tur,et al.  True Time Delay in Phased Arrays , 2016, Proceedings of the IEEE.