Synchronization of multiple DVB-T USB receivers for use in common radio astronomy applications

Price, Timothy (2016) Synchronization of multiple DVB-T USB receivers for use in common radio astronomy applications. [USQ Project]

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Abstract

DVB-T USB receivers are inexpensive devices that allow the user to stream raw in-phase and quadrature signals to a personal computer through the use of open source software. These signals can then be accessed to perform a wide range of software defined radio operations.

The data streams of multiple DVB-T USB receivers were successfully synchronized to have the correct time/phase relationship. This was done to further extend the possible applications of the devices. It was found that the timing and delay between both devices was dependent on the scheduling of the microcomputer being used to process the stream of data. Through sharing of a single clock source and the design of a hardware switching arrangement, synchronization was able to be achieved.

As a proof of concept, radio interferometry was to be applied to multiple radio telescopes in order to produce a greater angular resolution than possible by a single radio telescope. Two telescopes were constructed and tested and 21cm hydrogen-line emissions from the Milky Way galaxy were successfully detected. It was found that radio interferometry in this context was not fully possible as the sampling rate of the receivers was a limiting factor tothe system. Further applications to the synchronized devices were investigated.


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Item Type: USQ Project
Item Status: Live Archive
Additional Information: Bachelor of Engineering (Honours) Major Electrical & Electronic Engineering project
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering
Supervisors: Leis, John
Date Deposited: 21 Jul 2017 04:15
Last Modified: 21 Jul 2017 04:15
Uncontrolled Keywords: DVB-T USB receivers; radio astronomy applications; radio interferometry; radio telescopes
Fields of Research : 09 Engineering > 0906 Electrical and Electronic Engineering > 090602 Control Systems, Robotics and Automation
URI: http://eprints.usq.edu.au/id/eprint/31461

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