Please use this identifier to cite or link to this item: http://localhost/handle/Hannan/596632
Title: Study of Terahertz Superresolution Imaging Scheme With Real-Time Capability Based on Frequency Scanning Antenna
Authors: Shichao Li;Chao Li;Wei Liu;Zhaoyang Sun;Shinan Lang;Zheng Lu;Xiaojuan Zhang;Guangyou Fang
subject: terahertz|spatial smoothing method|frequency scanning reflector antennas (FSRA)|FS-MUSIC|superresolution imaging|Direction of arrival (DoA) estimation
Year: 2016
Publisher: IEEE
Abstract: In this paper, a terahertz (THz) imaging scheme with real-time capability is proposed based on frequency- controlled beam scanning. The scheme holds a concise system architecture comprising a frequency scanning reflector antenna (FSRA) as the transmitting antenna, an omnidirectional antenna as the receiving antenna, and a vector network analyzer as the transceiver. By employing the diffraction enhancement mechanism to improve the diffraction efficiency and to suppress the specular beam, a high-directivity FSRA with periodic planar binary structure is proposed and developed at 0.235-0.33 THz band for imaging applications. A superresolution algorithm is proposed and developed by combining the direction of arrival (DoA) estimation and the matched filter technique, in which the tradeoff between available range and azimuth information can be successfully overcome. To achieve DoA estimation, the MUltiple SIgnal Classification (MUSIC) algorithm which is commonly used in phased-array antennas is extended to the novel imaging scheme based on FSRA, which is referred to as FS-MUSIC algorithm. The model of FSRA manifold vector is constructed for FS-MUSIC with a modified spatial smoothing method specifically developed to decorrelate the coherent back-scattering signals and to resolve the targets located within a same half-power beamwidth (HPBW). The resolution of the FS-MUSIC algorithm is derived based on the Bayesian approach. Superresolution imaging with real-time capability was demonstrated by both the simulation and the proof-of-principle experiments in the 0.3-THz band. An FSRA operating on 0.3-THz frequency band was developed.
URI: http://localhost/handle/Hannan/185097
http://localhost/handle/Hannan/596632
ISSN: 2156-342X
2156-3446
volume: 6
issue: 3
Appears in Collections:2016

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Title: Study of Terahertz Superresolution Imaging Scheme With Real-Time Capability Based on Frequency Scanning Antenna
Authors: Shichao Li;Chao Li;Wei Liu;Zhaoyang Sun;Shinan Lang;Zheng Lu;Xiaojuan Zhang;Guangyou Fang
subject: terahertz|spatial smoothing method|frequency scanning reflector antennas (FSRA)|FS-MUSIC|superresolution imaging|Direction of arrival (DoA) estimation
Year: 2016
Publisher: IEEE
Abstract: In this paper, a terahertz (THz) imaging scheme with real-time capability is proposed based on frequency- controlled beam scanning. The scheme holds a concise system architecture comprising a frequency scanning reflector antenna (FSRA) as the transmitting antenna, an omnidirectional antenna as the receiving antenna, and a vector network analyzer as the transceiver. By employing the diffraction enhancement mechanism to improve the diffraction efficiency and to suppress the specular beam, a high-directivity FSRA with periodic planar binary structure is proposed and developed at 0.235-0.33 THz band for imaging applications. A superresolution algorithm is proposed and developed by combining the direction of arrival (DoA) estimation and the matched filter technique, in which the tradeoff between available range and azimuth information can be successfully overcome. To achieve DoA estimation, the MUltiple SIgnal Classification (MUSIC) algorithm which is commonly used in phased-array antennas is extended to the novel imaging scheme based on FSRA, which is referred to as FS-MUSIC algorithm. The model of FSRA manifold vector is constructed for FS-MUSIC with a modified spatial smoothing method specifically developed to decorrelate the coherent back-scattering signals and to resolve the targets located within a same half-power beamwidth (HPBW). The resolution of the FS-MUSIC algorithm is derived based on the Bayesian approach. Superresolution imaging with real-time capability was demonstrated by both the simulation and the proof-of-principle experiments in the 0.3-THz band. An FSRA operating on 0.3-THz frequency band was developed.
URI: http://localhost/handle/Hannan/185097
http://localhost/handle/Hannan/596632
ISSN: 2156-342X
2156-3446
volume: 6
issue: 3
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7426856.pdf2.26 MBAdobe PDFThumbnail
Preview File
Title: Study of Terahertz Superresolution Imaging Scheme With Real-Time Capability Based on Frequency Scanning Antenna
Authors: Shichao Li;Chao Li;Wei Liu;Zhaoyang Sun;Shinan Lang;Zheng Lu;Xiaojuan Zhang;Guangyou Fang
subject: terahertz|spatial smoothing method|frequency scanning reflector antennas (FSRA)|FS-MUSIC|superresolution imaging|Direction of arrival (DoA) estimation
Year: 2016
Publisher: IEEE
Abstract: In this paper, a terahertz (THz) imaging scheme with real-time capability is proposed based on frequency- controlled beam scanning. The scheme holds a concise system architecture comprising a frequency scanning reflector antenna (FSRA) as the transmitting antenna, an omnidirectional antenna as the receiving antenna, and a vector network analyzer as the transceiver. By employing the diffraction enhancement mechanism to improve the diffraction efficiency and to suppress the specular beam, a high-directivity FSRA with periodic planar binary structure is proposed and developed at 0.235-0.33 THz band for imaging applications. A superresolution algorithm is proposed and developed by combining the direction of arrival (DoA) estimation and the matched filter technique, in which the tradeoff between available range and azimuth information can be successfully overcome. To achieve DoA estimation, the MUltiple SIgnal Classification (MUSIC) algorithm which is commonly used in phased-array antennas is extended to the novel imaging scheme based on FSRA, which is referred to as FS-MUSIC algorithm. The model of FSRA manifold vector is constructed for FS-MUSIC with a modified spatial smoothing method specifically developed to decorrelate the coherent back-scattering signals and to resolve the targets located within a same half-power beamwidth (HPBW). The resolution of the FS-MUSIC algorithm is derived based on the Bayesian approach. Superresolution imaging with real-time capability was demonstrated by both the simulation and the proof-of-principle experiments in the 0.3-THz band. An FSRA operating on 0.3-THz frequency band was developed.
URI: http://localhost/handle/Hannan/185097
http://localhost/handle/Hannan/596632
ISSN: 2156-342X
2156-3446
volume: 6
issue: 3
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7426856.pdf2.26 MBAdobe PDFThumbnail
Preview File