2D Normalized Iterative Hard Thresholding Algorithm for Fast Compressive Radar Imaging

Li, Gongxin; Yang, Jia; Wang, Yuechao; Wang, Wenxue; Liu, Lianqing

doi:10.3390/rs9060619

Cited by 5 publications

(3 citation statements)

References 32 publications

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“…28,29 The center of compressive sensing is to recover a sparse signal x ∈ R N from an observation vector y ∈ R M and a measurement matrix Φ ∈ R M×N using the linear equation: y = Φx, where M < N. 30,31 Although the equation is under-determined, the unique solution x is also obtained if the x is sparse enough and the measurement matrix satisfies the restricted isometry property (RIP). 32,33 In practice, not all signals are sparse in their original form, but they can be sparsely represented in other spaces.…”

Section: Scheme Of the Single-pixel Imaging Systemmentioning

confidence: 99%

Development of an image biosensor based on an optogenetically engineered cell for visual prostheses

Wang

Yang

et al. 2019

Nanoscale

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Section: Scheme Of the Single-pixel Imaging Systemmentioning

confidence: 99%

Development of an image biosensor based on an optogenetically engineered cell for visual prostheses

Wang

Yang

et al. 2019

Nanoscale

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“…To test the performance of the cell‐based photodetector that we designed (Figure A), a biosyncretic imaging system was constructed (Figure B). The system consists of three principal components: i) A cell‐based photodetector, in which the cell is optogenetically engineered with a light‐sensitive protein, ChR2; ii) a patch‐clamp device, which provides a readout of the ionic photocurrent information of the cell under light irradiation; and iii) a single‐pixel design based on the compressive sensing theory (detail is described in Text S1 in the Supporting information) that converts the spatial information of an object scene into time‐varying light intensity signals to achieve high‐resolution image …”

Section: Introductionmentioning

confidence: 99%

Imaging with Optogenetically Engineered Living Cells as a Photodetector

Wang

et al. 2019

Adv. Biosys.

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Biosyncretic systems integrating biological components with electromechanical devices have recently become a promising technology, in which biological components are used as actuators or sensing elements with higher‐level performance than artificial systems. Here, a biosyncretic imaging system using an optogenetically engineered living cell as a photodetector is shown. The photoresponsive properties of the cell, such as spectrum and response range, dynamic characteristics, are measured and indicate that the cell functions as an excellent photodetector. In the system, the cell is directly utilized to generate light‐triggered ionic currents, which encode the spatial image information and therefore are used to reconstruct the scenes under the view based on compressive sensing. Imaging with the cell‐based photodetector is successfully performed by acquiring high‐definition images using the system. The system also displays function superiority to a commercial photodiode, such as wider dynamic responsivity range. This work represents a step toward directly imaging with living materials and paves a new road for the development of future on‐body bionic devices.

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“…In this SI, two significant examples of the use of CS are presented. The first regards a novel algorithm, called two-dimensional (2D) normalized iterative hard thresholding (NIHT), to directly reconstruct radar images in the matrix domain [18]. However, the computation complexity of CS-based methods limits its wide applications in SAR imaging.…”

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Editorial for Special Issue “Radar Systems for the Societal Challenges”

Soldovieri

Persico

2017

Remote Sensing

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The special issue (SI) "Radar Systems for the Societal Challenges" is an updated survey of recent advances in radar systems, encompassing several application fields and related to the impact on society. In fact, radar technology is now pervasive in society and is crucial for tackling social and economic issues for the wellbeing of the population. In fact, in addition to the classical application fields, i.e., navigation, air traffic control, and surveillance, emerging applications are now arising, which range from diagnostics and monitoring in civil engineering and cultural heritage, to medical applications, monitoring of environmental parameters, and security in urban areas. These new applications are possible thanks to the improved capabilities of radar systems, accompanied by new advanced modeling and data processing, able to tackle electromagnetically complex scenarios.Most of the works present in this SI can be categorized according to the relevant application fields.The first batch regards the use of radar systems in monitoring for environmental protection; in this area, a recent focus is on sea monitoring and observation, using radar systems on different platforms. In this frame, the first paper from Abileah et al. [1] investigates the possibilities offered by current and future satellite radar altimetry missions for the study of inland water bodies, probing into the peculiarities of the expected radar returns and their potential usage. Two other papers show the use of X-band radar systems for sea state monitoring. The first one presents a comparison between drifter and X-band wave radar for sea surface current estimation [2], while the other aims at improving the operational capabilities of X-band radar systems by performing advanced data processing for wind parameter estimation, starting from X-band radar collected in challenging rainy conditions [3]. The last paper of this batch regards the use of a new observation modality ensured by an X-Band airborne interferometric synthetic aperture radar (SAR) system for sea surface observation [4].Radar systems are now a significant observational tool in the field of Cultural Heritage monitoring, as shown by the paper from Masini et al. [5], which presents a significant example of integration of ground penetrating radar and electrical resistivity tomography for the archaeological investigation in Kaifeng (Henan, China). In [6], the capabilities of SAR interferometry have been demonstrated for monitoring ground deformation and structural instabilities over the ancient city walls (Ming Dynasty) in Nanjing City, China.Two recent fields of application of radar systems are security and healthcare. For these fields, different radar technologies are now under development and this SI presents a good survey of these research and technological efforts.In particular, good examples of the development and adaptation of the CW Doppler radar to the human detection and activity classification in through-wall configuration and for vital signs monitoring are presented in [7,8], r...

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2D Normalized Iterative Hard Thresholding Algorithm for Fast Compressive Radar Imaging

Cited by 5 publications

References 32 publications

Development of an image biosensor based on an optogenetically engineered cell for visual prostheses

Development of an image biosensor based on an optogenetically engineered cell for visual prostheses

Imaging with Optogenetically Engineered Living Cells as a Photodetector

Editorial for Special Issue “Radar Systems for the Societal Challenges”

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