Beamforming Techniques and Interference Mitigation Using a Multiple Feed Array for Radio ... PDF
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BBrriigghhaamm YYoouunngg UUnniivveerrssiittyy BBYYUU SScchhoollaarrssAArrcchhiivvee Theses and Dissertations 2004-03-03 BBeeaammffoorrmmiinngg TTeecchhnniiqquueess aanndd IInntteerrffeerreennccee MMiittiiggaattiioonn UUssiinngg aa MMuullttiippllee FFeeeedd AArrrraayy ffoorr RRaaddiioo AAssttrroonnoommyy Chad K. Hansen Brigham Young University - Provo Follow this and additional works at: https://scholarsarchive.byu.edu/etd Part of the Electrical and Computer Engineering Commons BBYYUU SScchhoollaarrssAArrcchhiivvee CCiittaattiioonn Hansen, Chad K., "Beamforming Techniques and Interference Mitigation Using a Multiple Feed Array for Radio Astronomy" (2004). Theses and Dissertations. 216. https://scholarsarchive.byu.edu/etd/216 This Thesis is brought to you for free and open access by BYU ScholarsArchive. It has been accepted for inclusion in Theses and Dissertations by an authorized administrator of BYU ScholarsArchive. For more information, please contact [email protected], [email protected]. BEAMFORMING TECHNIQUES AND INTERFERENCE MITIGATION USING A MULTIPLE FEED ARRAY FOR RADIO ASTRONOMY by Chad K. Hansen A thesis submitted to the faculty of Brigham Young University in partial fulfillment of the requirements for the degree of Master of Science Department of Electrical and Computer Engineering Brigham Young University April 2004 Copyright (cid:176)c 2004 Chad K. Hansen All Rights Reserved ABSTRACT BEAMFORMING TECHNIQUES AND INTERFERENCE MITIGATION USING A MULTIPLE FEED ARRAY FOR RADIO ASTRONOMY Chad K. Hansen Department of Electrical and Computer Engineering Master of Science Radiofrequencyinterferencehasbecomealargeproblemtoradioastronomers. This thesis proposes the idea that radio frequency interference can be mitigated using a phased array feed in conjunction with a large reflector. A phased array feed would allow radio astronomers to observe fainter signals than is currently possible, while at the same time enabling rapid sky surveys. A phased array feed was designed and simulated, and sensitivity optimization was performed on the array feed. It was shown that higher sensitivity can be achieved using a 7-element phased array feed than with a conventional waveguide feed. Simulations were ran using RFI mitigation algorithms on the array to show that interference cancellation can, in principle, be performed using a phased array feed. In addition to these simulations, improvements were made to a previously designed RF receiver so that radio astronomy observations could be made and interference mitigation algorithms tested on a receiver platform.
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