Presentation Title

A New Subwavelength Radar Imaging Algorithm: Algorithm Performance

Faculty Mentor

Enson Chang

Start Date

23-11-2019 10:45 AM

End Date

23-11-2019 11:30 AM

Location

230

Session

poster 4

Type of Presentation

Poster

Subject Area

physical_mathematical_sciences

Abstract

A New Subwavelength Radar Imaging Algorithm

Author: Nathaniel Tamminga, Brianna Christensen, Sarah Petry, Azusa Pacific University

Mentor: Enson Chang, Math, Physics, and Statistics Department, Azusa Pacific University

A new approach to chipless radio frequency identification (RFID) uses millimeter-wave synthetic aperture radar (SAR) to image metal ink-printed ID tags from the order of a meter away. This area is highly cost driven, so the metal patches are spaced as closely together as they can be, ideally into the subwavelength regime. Two conventional methods for imaging are circular SAR (CSAR) and Time-Reversal MUSIC (TR-MUSIC). However, both of these methods have drawbacks. While CSAR has sharply peaked point response in 2D, its side lobes of closely spaced targets create strong interference with each other. On the other hand, TR-MUSIC has minimal side lobes, but it requires a large number of transmitters and receivers, which makes it a very costly option. We propose a hybrid synthetic aperture TR-MUSIC algorithm (SATR-MUSlC) that has the benefits of both approaches without either of their drawbacks. Using a minimal number of transceivers, SATR-MUSlC is able to image objects separated by approximately 0.35 in 2D with minimal background interference. It does this by averaging TR-MUSICS's imaging kernel incoherently over the synthetic aperture. We also analyzed SATR-MUSIC when the sensors are set up in a linear configuration, which may be more practical, e.g. a conveyor setup. This setup was also able to produce high quality imaging in the subwavelength regime. This poster will show simulated images in both circular and linear setups and a comprehensive comparison of SATR-MUSIC performance against traditional TR-MUSIC.

Keywords: TR-MUSIC; SAR; CSAR; RFID; SATR-MUSIC; subwavelength; radar imaging; synthetic aperture;

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Nov 23rd, 10:45 AM Nov 23rd, 11:30 AM

A New Subwavelength Radar Imaging Algorithm: Algorithm Performance

230

A New Subwavelength Radar Imaging Algorithm

Author: Nathaniel Tamminga, Brianna Christensen, Sarah Petry, Azusa Pacific University

Mentor: Enson Chang, Math, Physics, and Statistics Department, Azusa Pacific University

A new approach to chipless radio frequency identification (RFID) uses millimeter-wave synthetic aperture radar (SAR) to image metal ink-printed ID tags from the order of a meter away. This area is highly cost driven, so the metal patches are spaced as closely together as they can be, ideally into the subwavelength regime. Two conventional methods for imaging are circular SAR (CSAR) and Time-Reversal MUSIC (TR-MUSIC). However, both of these methods have drawbacks. While CSAR has sharply peaked point response in 2D, its side lobes of closely spaced targets create strong interference with each other. On the other hand, TR-MUSIC has minimal side lobes, but it requires a large number of transmitters and receivers, which makes it a very costly option. We propose a hybrid synthetic aperture TR-MUSIC algorithm (SATR-MUSlC) that has the benefits of both approaches without either of their drawbacks. Using a minimal number of transceivers, SATR-MUSlC is able to image objects separated by approximately 0.35 in 2D with minimal background interference. It does this by averaging TR-MUSICS's imaging kernel incoherently over the synthetic aperture. We also analyzed SATR-MUSIC when the sensors are set up in a linear configuration, which may be more practical, e.g. a conveyor setup. This setup was also able to produce high quality imaging in the subwavelength regime. This poster will show simulated images in both circular and linear setups and a comprehensive comparison of SATR-MUSIC performance against traditional TR-MUSIC.

Keywords: TR-MUSIC; SAR; CSAR; RFID; SATR-MUSIC; subwavelength; radar imaging; synthetic aperture;