A Processing Framework for Airborne Microwave Photonic SAR With Resolution Up To 0.03 m: Motion Estimation and Compensation

Deng, Yuhui; Xing, Mengdao; Sun, Guang-Cai; Liu, Wenkang; Li, Ruoming; Wang, Yong

doi:10.1109/tgrs.2022.3229302

Cited by 24 publications

(6 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Relative to existing works, the presented approach is uniquely advantageous in its collective real-time nature, low computational and hardware complexity, and complex motion generalizability, with either comparable or superior suppression performance, as summarized in Table 3. Note that [25] and [27] present motion compensation approaches for SAR applications, which require neither realtime nor low-latency operation. Nevertheless, these works still provide an apt point of reference for the achievable motion suppression relative to computational complexity, verifying the presented algorithm's potential for edge sensing applications.…”

Section: B Multimode Harmonic Motion Suppression Resultsmentioning

confidence: 99%

“…Holistic post-processing, though inarguably advantageous with respect to the resolution and SNR increase afforded by the vast quantity of data, is infeasible for resource-constrained edge devices requiring low-latency, real-time operation. Among existing works, synthetic aperture radar (SAR) motion compensation typically involves the use of computationally intensive algorithms such as the Doppler Keystone transform (DKT), range cell migration correction, and phase gradient autofocus [25], [26], [27], [28], [29], [30], [31]. Other higher-performance methods such as parametric DKT [32], range envelope correction [33], short-time-Fourier-transform (STFT) histogram-based interference removal [34], range-dependent map drift correction [35], and ML algorithms [36], [37], [38], among others [25], [39], [40], [41], entail even greater computational load and/or have been exclusively deployed in post-processing.…”

Section: A Related Workmentioning

confidence: 99%

See 1 more Smart Citation

Anchor-Based, Real-Time Motion Compensation for High-Resolution mmWave Radar

Poole,

Arbabian

2024

IEEE J. Microw.

View full text Add to dashboard Cite

In the modern domain of edge sensing and physically compact smart devices, mmWave radar has emerged as a prominent modality, simultaneously offering high-resolution perception capacity and accommodatingly small form factor. The inevitable presence of device motion, however, corrupts the received radar data, reducing target sensing capability and requiring active correction to address the resultant spectral "blurring". Existing motion compensation techniques utilize computationally intensive post-processing algorithms and/or auxiliary hardware, aspects ill-suited for resource-limited edge devices requiring minimal system latency and complexity. Early works also often consider motion dynamics such as pure single-mode vibration, neglecting additional modes as well as non-harmonic motion content. We resolve both of these limitations by presenting a real-time-compatible, generalized complex motion compensation algorithm capable of correcting multicomponent platform trajectories involving both non-harmonic transients and multimode harmonic vibration. The proposed anchor-based approach achieves average SNR gains of 24.9 dB and 19.7 dB across transient duration and target velocity, respectively, and average multimode harmonic suppressions of 38.9 dB and 29.4 dB across vibration parameters and target velocity, respectively. These results, combined with minimal latency (≤ 240 ms), low algorithmic complexity, and the elimination of any additional auxiliary sensors, render the proposed method suitable for deployment in typical edge sensing applications.INDEX TERMS Real-time sensing, mmWave radar, high-resolution radar, imaging radar, complex motion, deconvolution, radar signal processing, anchor point.

show abstract

Section: B Multimode Harmonic Motion Suppression Resultsmentioning

confidence: 99%

Section: A Related Workmentioning

confidence: 99%

Anchor-Based, Real-Time Motion Compensation for High-Resolution mmWave Radar

Poole,

Arbabian

2024

IEEE J. Microw.

View full text Add to dashboard Cite

show abstract

“…The Microwave Photon Center of the Wuhan Electronic Institute and Xidain University successfully developed a Ka-band 10 GHz bandwidth microwave photonic UWB radar and carried out vehicle-mounted tests to image the famous Leifeng Tower in Hangzhou [13]. In 2022, Xidian University publicly reported the processing of airborne microwave photonic radar and obtained high-quality images of 0.03 m resolution [57].…”

Section: Microwave Photonic Technologymentioning

confidence: 99%

Very High Resolution Synthetic Aperture Radar Systems and Imaging: A Review

Chen,

Dong,

Zhang

et al. 2024

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

View full text Add to dashboard Cite

Given its capacity to generate 2-D fine images of observation areas, very high-resolution (VHR) synthetic aperture radar (SAR) has become increasingly popular in myriad fields, including remote sensing, geoscience, and surveillance. In this article, we present a comprehensive overview of VHR SAR systems and imaging to highlight the related research and promote further development. First, we provide a summary of VHR SAR applications and summarize the typical airborne and spaceborne systems. Subsequently, a detailed overview is provided to demonstrate the range VHR technologies by introducing dechirp processing, stepped-frequency, and microwave photonic. Additionally, VHR imaging methods on different platforms, i.e., ideal trajectory, airborne, and spaceborne, are reviewed. Finally, the challenges and prospects of VHR SAR are presented to inform future research directions. This work provides a valuable resource to improve the system design and signal processing of VHR SAR.

show abstract

“…Synthetic aperture radar (SAR) is an active remote-sensing technique that can operate in several different modes [1,2]. With the developments over the past few decades, it can realize ultra-high-resolution (UHR) up to the centimeter level [3][4][5]. For UHR squint spotlight SAR, the squint mode is more flexible compared with the side-looking mode [6,7], and the UHR means more detailed information about the observation scenarios of interest.…”

Section: Introductionmentioning

confidence: 99%

Two-Dimensional Autofocus for Ultra-High-Resolution Squint Spotlight Airborne SAR Based on Improved Spectrum Modification

Chen,

Qiu,

Cheng

et al. 2024

Remote Sensing

Self Cite

View full text Add to dashboard Cite

For ultra-high-resolution (UHR) squint spotlight airborne synthetic aperture radar (SAR), the severe range-azimuth coupling caused by squint mode and the spatial and frequency dependence of the motion error brought by ultra-wide bandwidth both make it difficult to obtain satisfactory imaging results. Although some autofocus methods for squint airborne SAR have been presented in the published literature, their practical applicability in UHR situations remains limited. In this article, a new 2D wavenumber domain autofocus method combined with the Omega-K algorithm dedicated to UHR squint spotlight airborne SAR is proposed. First, we analyze the dependence of range envelope shift error (RESE) and range defocus on the squint angle and then propose a new spectrum modification strategy, after which the spectrum transforms into a quasi-side-looking one. The accuracy of estimation and compensation can be improved significantly in this way. Then, the 2D phase error can be calculated with the 1D estimated error by the mapping relationship, and after that the 2D compensation is performed in the wavenumber domain. Furthermore, the image-blocking technique and range-dependent motion error compensation method are embedded to accommodate the spatial-variant motion error for UHR cases. Simulations are carried out to verify the effectiveness of the proposed method.

show abstract

A Processing Framework for Airborne Microwave Photonic SAR With Resolution Up To 0.03 m: Motion Estimation and Compensation

Cited by 24 publications

References 39 publications

Anchor-Based, Real-Time Motion Compensation for High-Resolution mmWave Radar

Anchor-Based, Real-Time Motion Compensation for High-Resolution mmWave Radar

Very High Resolution Synthetic Aperture Radar Systems and Imaging: A Review

Two-Dimensional Autofocus for Ultra-High-Resolution Squint Spotlight Airborne SAR Based on Improved Spectrum Modification

Contact Info

Product

Resources

About