A Technique for Magnetron Oscillator Based Inverse Synthetic Aperture Radar Image Formation
Year: 2019
Type: article
Abstract: Magnetron oscillator based marine radar technology is mature, affordable, reliable and very effective for maritime safety applications.Commercial systems such as the Furuno DRS25A may be procured at a modest cost as compared to fully coherent solid-state systems costing many tens of thousands of dollars.Magnetron oscillators inherently generate random phase signals.Phase instability on a pulse-to-pulse basis impedes this class of marine radar from success in applications requiring coherency such as moving target indication (MTI) or in generating target imagery.This limitation may be overcome by incorporating radio frequency (RF) sampling technology to augment the current capability of available systems.RF sampling in order to extract a reference signal on transmit and a target echo on receive permits fully coherent processing.Marine radars traditionally operate non-coherently, and as such, offer limited surveillance in clutter rich environments.In this article, we report on a non-coherent marine radar that has been modified to produce a pseudocoherent (coherent-on-receive) sensor system.This is crucial to MTI or target image formation.In laboratory experiments, we employed a magnetron oscillator based system to generate an inverse synthetic aperture radar (ISAR) image.Using four different algorithms: filtered back-projection (FBP), time domain and frequency domain back-projection (TDBP and FDBP), and the Algebraic reconstruction technique (ART), images have been formed and results compared.iii This dissertation is dedicated to my Father may Allah rest his soul in Heaven.To my Mother for her unconditional love and support.For my siblings for their support.To my lovely wife for her unlimited standing with
Author: Mansour Aljohani
Language: English
Subfield: Aerospace Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W3096526558