Secondary range compression for improved range/Doppler processing of SAR data with high squint
department or school: Applied Science, Faculty of
department or school: Electrical Engineering, Department of
data provider: DSpace
degree campus: UBCV
creator: Schmidt, Alfred Rudolf
issued: 2010-07-11T16:18:55Z
issued: 1986
related degree: Master of Applied Science - MASc
degree grantor: University of British Columbia
description: This thesis examines a new algorithm, to be called secondary range compression (SRC), for significantly improving the range resolution of the range/Doppler synthetic aperture radar (SAR) processing algorithm when the radar antenna is significantly squinted away from the zero Doppler direction. The algorithm was recently introduced by Jin and Wu [13] for application to the SEASAT SAR sensor. Significant extensions of their algorithm and models are presented. First the model of range broadening in the basic range/Doppler algorithm is extended by using a more general form for the range compressed profile. A mathematical theory is developed to examine more closely the approximations involved in both basic range/Doppler processing and SRC and to explore alternate SRC implementations. The theory is used to derive the SRC algorithm as a matched filter directly from the point target response model rather from the simplified range compressed response used by Jin and Wu. Two new discrete implementations (azimuth SRC and range SRC) are developed for both single-look and multilook processing. In addition two new alternate methods of multilook SRC are presented : fixed SRC and look-dependent SRC. The sensitivity of the SRC algorithms to parameter errors is investigated. Extensive simulations are developed to quantify the image quality produced by each algorithm for a variety of processing parameters. The simulation results with nominal RADARSAT parameters show that the SRC algorithms can significantly extend the range of squint angles which can be processed with the range/Doppler type of algorithm.
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/26325
note: FOR SECONDARY RANGE COMPRESSION IMPROVED RANGE/DOPPLER PROCESSING OF SAR DATA WITH HIGH SQUINT by ALFRED RUDOLF SCHMIDT B.Sc. Engineering Physics, Queen's University, 1981 A THESIS SUBMITTED IN PARTIAL FULFILMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF APPLIED SCIENCE i n THE FACULTY OF GRADUATE STUDIES Department of E l e c t r i c a l Engineering We accept t h i s thesis as conforming to the required standard THE UNIVERSITY OF BRITISH COLUMBIA September 1986 © Al f r e d Rudolf Schmidt, 1986 In presenting t h i s thesis in p a r t i a l fulfilment of the requirements for an advanced degree at the University of B r i t i s h Columbia, I agree that the Library s h a l l make i t f r e e l y available for reference and study. I further agree that permission for extensive copying of this thesis for scholarly purposes may be granted by the Head of my Department or by his or her representatives. It i s understood that copying or publication of t h i s thesis for f i n a n c i a l gain s h a l l not be allowed without my written permission. Department of E l e c t r i c a l Engineering The University of B r i t i s h Columbia 2075 Wesbrook Place Vancouver, Canada V6T 1W5 Date: September 1986 Abstract This thesis examines a new algorithm, to be c a l l e d secondary range compression (SRC), for s i g n i f i c a n t l y improving the range resolution of the range/Doppler synthetic aperture radar (SAR) processing algorithm when the radar antenna i s s i g n i f i c a n t l y squinted away from the zero Doppler d i r e c t i o n . The algorithm was recently introduced by J i n and Wu [13] for application to the SEASAT SAR sensor. S i g n i f i c a n t extensions of the i r algorithm and models are presented. F i r s t the model of range broadening in the basic range/Doppler algorithm i s extended by using a more general form for the range compressed p r o f i l e . A mathematical theory i s developed to examine more c l o s e l y the approximations involved in both …
has type: Thesis/Dissertation
is shown at: 10.14288/1.0096919
language: eng
degree discipline: Electrical and Computer Engineering
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
scholar level: Graduate
type: Text
identifier URI: http://hdl.handle.net/2429/26325