Photonics-based radar with balanced I/Q de-chirping for interference-suppressed high-resolution detection and imaging

Ye, Xingwei; Zhang, Fangzheng; Yue, Yang; Pan, Shilong

doi:10.1364/prj.7.000265

Cited by 76 publications

(18 citation statements)

References 29 publications

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“…In the proposed radar, the photonics-based I/Q upconversion of the baseband LFM signal is beneficial to the implementation of both the range and the cross-range resolution. By applying I/Q up-conversion, the sampling rate of the AWG does not need to cover the intermediate frequency carrier which is unavoidable in frequency multiplication-based photonic radar transmitters [30], [31]. Thus, the full bandwidth of the AWG can be used to produce a broadband waveform for higher range resolution.…”

Section: Principlementioning

confidence: 99%

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

Zhang

Yue

et al. 2019

IEEE Access

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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. INDEX TERMS Radar, inverse synthetic aperture radar, microwave photonics, 3D imaging, de-chirp processing.

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Section: Principlementioning

confidence: 99%

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

Zhang

Yue

et al. 2019

IEEE Access

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“…Photonic I/Q mixing or image-reject mixing can apply wideband coherent cancellation to overcome this problem using optical 90°hybrid or microwave photonic phase shifters, [30,31] which not only ensures a wideband de-chirping, but also eliminates the frequency mixing between radar echoes of different targets. [13] Wavelength-division multiplexing may also be adopted for the chip-based system, which opens the possibility for on-chip arrayed radar or MIMO radar with reduced hardware resources.…”

Section: Discussionmentioning

confidence: 99%

Chip‐Based Microwave‐Photonic Radar for High‐Resolution Imaging

Cui

et al. 2020

Laser & Photonics Reviews

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Radar is the only sensor that can realize target imaging at all time and all weather, which would be a key technical enabler for future intelligent society. Poor resolution and large size are the two critical issues for radar to gain ground in civil applications. Conventional electronic radars are difficult to address due to both issues, especially in the Ka band or lower. In this work, a chip-based microwave-photonic radar based on silicon photonic platform, which can implement high-resolution imaging with very small footprint, is proposed and experimentally demonstrated. Both the wideband signal generator and the de-chirp receiver are integrated on the chip. A broadband microwave-photonic imaging radar occupying the full Ku band is experimentally established. A high-precision range measurement with a resolution of 2.7 cm and an error of less than 2.75 mm is obtained. Inverse synthetic aperture imaging of multiple targets with complex profiles is also implemented.

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“…which the image interference is eliminated. With this structure, a photonics-based radar using balanced I/Q de-chirping in the receiver was reported [225], achieving an image-rejection ratio higher than 30 dB. The spurs caused by the baseband envelope and the frequency mixing between radar echoes with different time delays were successfully eliminated.…”

Section: Microwave Photonic Mixing and Channelizationmentioning

confidence: 99%

“…In order to remove the image-frequency interferences and false targets in the single-channel photonic de-chirping receiver with real-valued outputs used in [32], [218], [226]- [228], [375], a photonics-based radar architecture using in-phase and quadrature (I/Q) de-chirping receiver with balanced detection was proposed [225], as shown in Fig. 33.…”

Section: A Optoelectronic Hybrid Radarmentioning

confidence: 99%

Microwave Photonic Radars

Pan

Zhang

2020

J. Lightwave Technol.

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279

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As the only method for all-weather, all-time and longdistance target detection and recognition, radar has been intensively studied since it was invented, and is considered as an essential sensor for future intelligent society. In the past few decades, great efforts were devoted to improving radar's functionality, precision, and response time, of which the key is to generate, control and process a wideband signal with high speed. Thanks to the broad bandwidth, flat response, low loss transmission, multidimensional multiplexing, ultrafast analog signal processing and electromagnetic interference immunity provided by modern photonics, implementation of the radar in the optical domain can achieve better performance in terms of resolution, coverage, and speed which would be difficult (if not impossible) to implement using traditional, even state-of-the-art electronics. In this tutorial, we overview the distinct features of microwave photonics and some key microwave photonic technologies that are currently known to be attractive for radars. System architectures and their performance that may interest the radar society are emphasized. Emerging technologies in this area and possible future research directions are discussed.

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Photonics-based radar with balanced I/Q de-chirping for interference-suppressed high-resolution detection and imaging

Cited by 76 publications

References 29 publications

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

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

Chip‐Based Microwave‐Photonic Radar for High‐Resolution Imaging

Microwave Photonic Radars

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