A High-Frequency Motion Error Compensation Algorithm Based on Multiple Errors Separation in BiSAR Onboard Mini-UAVs

Wang, Zhanze; Liu, Feifeng; Zeng, Tao; He, Simin

doi:10.1109/tgrs.2022.3150081

Cited by 5 publications

(2 citation statements)

References 37 publications

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“…Since spaceborne SAR was first launched in 1978, the imaging algorithms of SAR have been developed for many years [6]- [10]. Aiming at the variable SAR motion trajectory, the motion compensation method [11]- [15] uses the real-time recorded platform position and motion information to calculate the motion error and realize the compensation. Another autofocus method [16]- [20] is to use the radar echo data to evaluate the motion error.…”

Section: Introductionmentioning

confidence: 99%

A Modified Algorithm for Highly Squinted Missile-Borne SAR Imaging With Large Acceleration

Zheng,

Guan,

Jiang

et al. 2024

IEEE Access

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The acceleration imaging algorithm of missile-borne SAR deals with acceleration and high squint angle using an equivalent range model. However, the original missile-borne SAR acceleration imaging algorithm will be ineffective because the phase error compensation for the center point of the scene is no longer applicable to all point targets in the presence of increased acceleration. To address this problem, this paper makes improvements to the missile-borne SAR acceleration imaging algorithm and adds compensation measures for slant distance approximation error. The corresponding imaging algorithms are designed and the space-variant errors of the range and azimuth are compensated respectively. Simulation experiments verify the accuracy and effectiveness of the proposed algorithm.INDEX TERMS synthetic aperture radar (SAR), missile-borne SAR, high squint, large acceleration, spacevariant error compensation.

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Section: Introductionmentioning

confidence: 99%

A Modified Algorithm for Highly Squinted Missile-Borne SAR Imaging With Large Acceleration

Zheng,

Guan,

Jiang

et al. 2024

IEEE Access

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“…Introduction: Mini-unmanned aerial vehicle (UAV)-based bistatic synthetic aperture radar (BiSAR) systems are widely used due to their light weight, small size, flexibility and low cost [1,2]. For the BiSAR system, synchronization is the foundation of imaging, and a direct signal is an effective method to achieve synchronization [3].…”

mentioning

confidence: 99%

Synchronization for mini‐UAV‐based high‐resolution BiSAR systems: Lost direct signal estimation based on Hampel filtering

Wang

Liu

Zhang

et al. 2022

Electronics Letters

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In mini‐unmanned aerial vehicle‐based high‐resolution bistatic synthetic aperture radar systems, the rotation of the unmanned aerial vehicle platforms will cause direct signal loss, resulting in the reduction of synchronization error compensation accuracy. Here, a synchronization algorithm is proposed to estimate the lost direct signal. First, bistatic time and phase synchronization signal models are established. Then, Hampel filtering is used to estimate the time delay of the lost direct signal, and the time and phase synchronization errors are estimated based on third‐order polynomial fitting. A high‐resolution synthetic aperture radar image is used to demonstrate the validity of the proposed algorithm in mini‐unmanned aerial vehicle‐based high‐resolution bistatic synthetic aperture radar systems.

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A LEO Spaceborne-Airborne Bistatic SAR Imaging Experiment

Zhang

Liu

Wang

et al. 2022

2022 IEEE International Conference on Signal Processing, Communications and Computing (ICSPCC)

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A High-Frequency Motion Error Compensation Algorithm Based on Multiple Errors Separation in BiSAR Onboard Mini-UAVs

Cited by 5 publications

References 37 publications

A Modified Algorithm for Highly Squinted Missile-Borne SAR Imaging With Large Acceleration

A Modified Algorithm for Highly Squinted Missile-Borne SAR Imaging With Large Acceleration

Synchronization for mini‐UAV‐based high‐resolution BiSAR systems: Lost direct signal estimation based on Hampel filtering

A LEO Spaceborne-Airborne Bistatic SAR Imaging Experiment

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