ERA

Download the full-sized PDF of FMCW-SAR System For Near Distance Imaging ApplicationsDownload the full-sized PDF

Analytics

Share

Permanent link (DOI): https://doi.org/10.7939/R3FX7495Z

Download

Export to: EndNote  |  Zotero  |  Mendeley

Communities

This file is in the following communities:

Graduate Studies and Research, Faculty of

Collections

This file is in the following collections:

Theses and Dissertations

FMCW-SAR System For Near Distance Imaging Applications Open Access

Descriptions

Other title
Subject/Keyword
FMCW
SAR
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Ting, Jui wen
Supervisor and department
Karumudi, Rambabu (Electrical and Computer Engineering)
Examining committee member and department
Jing, Yindi (Electrical and Computer Engineering)
Moez, Kambiz (Electrical and Computer Engineering)
Department
Department of Electrical and Computer Engineering
Specialization
Electromagnetics and Microwaves
Date accepted
2017-03-01T11:00:33Z
Graduation date
2017-06:Spring 2017
Degree
Master of Science
Degree level
Master's
Abstract
A combination of frequency-modulated continuous-wave (FMCW) technology with synthetic aperture radar (SAR) principles is a highly sought after method as it leads to a compact and cost effective high resolution near distance imaging system. However, there are a few design issues associated with FMCW radar systems that need to be addressed in order to design an optimal FMCW SAR imaging system. One of the limiting factors of FMCW radars is that the ramp signal modulates the received signal, which limits the minimum achievable range resolution. In addition, the voltage controlled oscillator (VCO) adds a certain degree of phase noise and nonlinearity to the transmitted signal that degrades the signal-to-noise ratio (SNR), range accuracy and image resolution. To resolve these issues, a multitude of hardware and software approaches have been proposed for the suppression of phase noise and nonlinearity of the transmitted signal. However, these approaches resolve only individual issues, limiting their applicability in the design of FMCW SAR imaging systems. This work seeks to overcome the three design issues mentioned above through the development of simulation platforms, which has been shown to be well-suited for the comprehensive study of these effects. A signal processing procedure with system calibration methods to mitigate the effects of deramp, phase noise and nonlinearity of the VCO on the beat spectrum is proposed. Additionally, the effect of bandwidth, integration angle and phase noise of the received pulses on the SAR image resolution in both range and cross-range directions are comprehensively studied. To improve the range accuracy, different calibration methods are also comprehensively studied. To demonstrate the effectiveness and versatility of the proposed signal processing procedure, an S-band FMCW radar system, using off-the-shelf components, is designed for near distance target imaging using linear and circular SAR techniques. The reconstructed images show the improvement of image quality and accuracy in the target position. Finally, several avenues of further study and applications are suggested.
Language
English
DOI
doi:10.7939/R3FX7495Z
Rights
This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for the purpose of private, scholarly or scientific research. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.
Citation for previous publication

File Details

Date Uploaded
Date Modified
2017-03-01T18:00:34.580+00:00
Audit Status
Audits have not yet been run on this file.
Characterization
File format: pdf (PDF/A)
Mime type: application/pdf
File size: 9252109
Last modified: 2017:06:13 12:15:39-06:00
Filename: Ting_Jui wen_201702_MSc.pdf
Original checksum: 98df3433848ff1d69c47df3ee5824200
Activity of users you follow
User Activity Date