Microwave Photonic MIMO Radar for High-Resolution Imaging

Gao, Bindong; Zhang, Fangzheng; Sun, Guanqun; Xiang, Yu; Pan, Shilong

doi:10.1109/jlt.2021.3070591

Cited by 26 publications

(6 citation statements)

References 27 publications

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“…A straightforward approach to design the waveform is to analyse the detection probability of the NP detector in (10), and optimise the waveform by maximising the detection probability. However, the probability of detection related to (10) is too complex to be used as a design metric. Alternatively, we utilise relative entropy to devise the waveforms.…”

Section: Problem Formulationsmentioning

confidence: 99%

“…[7,35] and the references therein). Figure 2a,b show the relative entropy and the probability of detection of the two algorithms versus different transmit energy, where the NP detector in (10) is used to analyse the detection performance. The probability of false alarm is fixed to be P fa = 10 −3 .…”

Section: Colocated Mimo Radarmentioning

confidence: 99%

“…Different from the phased array radar, colocated MIMO radar can transmit arbitrary waveforms to gain extra degrees of freedom so as to achieve better detection and estimation performance [4][5][6]. MIMO radar has a lot of advantages, such as in fading mitigation [7], resolution enhancement [8][9][10][11], higher target localisation accuracy [12][13][14] and improved interference and jamming suppression capability [15]. In addition, MIMO radar has excellent performance in multiple target detection [16,17], parameter estimation [18][19][20], parameter identifiability [4] and target tracking [21][22][23] as well.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Optimisation of practically constrained waveforms for Rician target detection with multiple‐input‐multiple‐output radar

Wang

Tang

Zhang

2022

IET Radar Sonar & Navi

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In this paper, the waveform design for Rician target detection with multiple-inputmultiple-output radar is addressed. The relative entropy between the distributions of the observations under two hypotheses is employed as the design metric. Due to the difficulty of tackling the non-convex waveform design problem, a novel algorithm based on minorisation-maximisation is developed. Since a simple quadratic function is established to minorise the objective function, the presented algorithm has lower computational complexity than its counterparts. Moreover, it can be extended to design waveforms under many practical constraints, including the constant-envelope constraint, the similarity constraint, and the constant-envelope and similarity constraints. Numerical results are provided to show the effectiveness of the proposed algorithm for detecting Rician targets. Moreover, the designed waveforms can be used to enhance the detection performance of a Swerling 0 target in the presence of angle mismatch.

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Section: Problem Formulationsmentioning

confidence: 99%

Section: Colocated Mimo Radarmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optimisation of practically constrained waveforms for Rician target detection with multiple‐input‐multiple‐output radar

Wang

Tang

Zhang

2022

IET Radar Sonar & Navi

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“…A multistatic coherent MIMO SAR system with the central and coherent fusion of all sensor raw data is still experimentally unexplored, except for a few limited lab prototypes [15,16].…”

Section: Introductionmentioning

confidence: 99%

Multi-Static Multi-Band Synthetic Aperture Radar (SAR) Constellation Based on Integrated Photonic Circuits

et al. 2022

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Multi-static SARs from LEO orbits allow the single-pass high-resolution imaging and detection of moving targets. A coherent MIMO approach requires the generation of multi-band, thus orthogonal, signals, the fusion of which increases the system resolution. Up to now the synchronization capability of SAR signals of different satellites is critical. Here, we propose the use of photonics to generate, receive and distribute the radar signals in a coherent multi-static SAR constellation. Photonics overcomes issues in the implementation of MIMO SAR, allowing for the flexible generation of multi-band signals and centralized generation in a primary satellite with coherent distribution to all the secondary satellites of the SAR signals over FSO links. The numerical analysis shows the proposed system has a NESZ < −29.6 dB, satisfying the SAR system requirements. An experimental proof of concept based on COTS, for both signal up- and down-conversion, is implemented to demonstrate the system functionality, showing performance similar to the simulations. The implementation of the proposed systems with integrated technologies could reduce the system SWaP and increase robustness to vibrations. A design based on the consolidated SOI platform with the transfer printing-based hybrid integration of InP semiconductor optical amplifiers is proposed. The amplifiers compensate for the losses of the passive SOI waveguides, decreasing the overall conversion loss. The polarization multiplexing of the modulated and unmodulated combs to be sent from (to) the primary to (from) the secondary satellite over the FSO links avoids complex space-consuming optical filters requiring several control signals.

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“…Recently, researchers have proposed different methods to attain highresolution detection using photonic radars. In [11], a 4 × 8 Multiple-Input Multiple-Output (MIMO) photonic radar is demonstrated with each channel having orthogonal linearly frequency modulated signal generated by heterodyne scheme and 2 GHz bandwidth resulted in range resolution of 7.5 cm. Earlier direct detection scheme-based photonic radar is proposed with a range ability of 750 m under adverse atmospheric conditions [12] with minimum input power requirement.…”

Section: Introductionmentioning

confidence: 99%

Speed-Direction Sensing under Multiple Vehicles Scenario Using燩hotonic燫adars

Sharma¹,

Chaudhary²,

Malhotra³

et al. 2022

Computers, Materials &Amp; Continua

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Recent reports from World Health Organization (WHO) show the impact of human negligence as a serious concern for road accidents and casualties worldwide. There are number of reasons which led to this negligence; hence, need of intelligent transportation system (ITS) gains more attention from researchers worldwide. For achieving such autonomy different sensors are involved in autonomous vehicles which can sense road conditions and warn the control system about possible hazards. This work is focused on designing one such sensor system which can detect and range multiple targets under the impact of adverse atmospheric conditions. A high-speed Linear Frequency Modulated Continuous Wave (LFMCW) based Photonic Radar is proposed to detect multiple targets by integrating Mode division multiplexing (MDM). Reported results in terms of range frequency, Doppler frequency and range resolution are demonstrated using numerical simulations with the bandwidths of 1 and 4 GHz and under adverse atmospheric conditions carrying 75 dB/km of attenuation. To prove the effectiveness of the proposed photonic radar, moving targets are also demonstrated with different speed. System reported substantial range resolution of 15 cm using 1 GHz of bandwidth and 3 cm using 4 GHz of bandwidth.

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Microwave Photonic MIMO Radar for High-Resolution Imaging

Cited by 26 publications

References 27 publications

Optimisation of practically constrained waveforms for Rician target detection with multiple‐input‐multiple‐output radar

Optimisation of practically constrained waveforms for Rician target detection with multiple‐input‐multiple‐output radar

Multi-Static Multi-Band Synthetic Aperture Radar (SAR) Constellation Based on Integrated Photonic Circuits

Speed-Direction Sensing under Multiple Vehicles Scenario Using燩hotonic燫adars

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