Implementation of a Millimeter Wave Imaging Algorithm Based on Compressed Sensing

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Farsaee, Amir Ashkan | 2015

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 47715 (05)
University: Sharif University of Technology
Department: Electrical Engineering
Advisor(s): Shabany, Mahdi; Kavehvash, Zahra
Abstract:
Recently, millimeter wave imaging (MMWI) technology is given more attention. This is as a result of three facts. First, despite the infrared or optical cameras, these systems can image a target, which is obscured by one or more optically barriers. Second, the electronics circuits in this band have seen great achievements in the current decade, which facilitate the implementation of MMWI structures. Third, there is no known health hazard for the systems operating in this band with moderate power. Therefore, in this project, a MMWI system based on compressed sensing (CS) for the concealed weapon detection application is proposed. This design consists of a linear antenna array, an appropriate mechanical setup, and a FPGA platform for the processing unit. Furthermore, in this work, we have implemented the processing unit on FPGA. Recorded data will be processed through solving a convex optimization procedure in order to find the output image. Reducing the number of measurements (almost 75 % reduction), mechanical movements (less than 50 positions), and the scanning time (less than 10 seconds) are the main achievements of the proposed imaging structure
Keywords:
Holography ; Synthetic Aperture Radar (SAR) ; Compressive Sensing ; Millimeter Waves Propagation