Inlämning av Examensarbete / Submission of Thesis

Ishtiaque Ahmed MEE08:42, pp. 68. TEK/avd. för telekommunikationssystem, 2008.

The work

Författare / Author: Ishtiaque Ahmed
Titel / Title: Study of the Local Backprojection Algorithm for Image Formation in Ultra Wideband Synthetic Aperture Radar
Abstrakt Abstract:

The purpose of this thesis project is to study and evaluate a UWB Synthetic Aperture Radar (SAR) data image formation algorithm, that was previously less familiar and, that has recently got much attention in this field. Certain properties of it made it acquire a status in radar signal processing branch. This is a fast time-domain algorithm named Local Backprojection (LBP).

The LBP algorithm has been implemented for SAR image formation. The algorithm has been simulated in MATLAB using standard values of pertinent parameters. Later, an evaluation of the LBP algorithm has been performed and all the comments, estimation and judgment have been done on the basis of the resulting images. The LBP has also been compared with the basic time-domain algorithm Global Backprojection (GBP) with respect to the SAR images.

The specialty of LBP algorithm is in its reduced computational load than in GBP. LBP is a two stage algorithm — it forms the beam first for a particular subimage and, in a later stage, forms the image of that subimage area. The signal data collected from the target is processed and backprojected locally for every subimage individually. This is the reason of naming it Local backprojection. After the formation of all subimages, these are arranged and combined coherently to form the full SAR image.

Ämnesord / Subject: Telekommunikation - Telecommunications
Signalbehandling - Signal Processing
Nyckelord / Keywords: SAR, LBP, UWB, Subimage, Subaperture, Image formation, Backprojection

Publication info

Dokument id / Document id:
Program:/ Programme Magisterprogram i Elektroteknik / Master of Science in Electrical Engineering
Registreringsdatum / Date of registration: 12/04/2008
Uppsatstyp / Type of thesis: Masterarbete/Master's Thesis (120 credits)


Handledare / Supervisor: Viet T. Vu, Thomas K. Sjögren
Organisation / Organisation: Blekinge Institute of Technology
Institution / School: TEK/avd. för telekommunikationssystem
S-371 41 Karlskrona
+46 455 38 50 00
Anmärkningar / Comments:


Files & Access

Bifogad uppsats fil(er) / Files attached: thesis_lbp__ahmed.pdf (785 kB, öppnas i nytt fönster)