Dan Wells' -- Bachelor of Science (Honours) -- 2007

Project Title: IEEE 802.11 Signal Source Mapping using Low Cost Spectrum Analysers


The research presented by this dissertation, describes an investigation into visualising 2.4 GHz Wi-Fi networks and discovering the location of 2.4 GHz devices using a collection of low cost MetaGeek WiSpy 2.4 GHz Spectrum Analysers. By combining frequency VS amplitude data received from WiSpy spectrum analysers and graphically displaying the data we can effectively discover 2.4 GHz Wi-Fi devices and interference sources. Research was done into interference sources that hamper the performance of Wi-Fi throughput, these include any radio frequency devices which operate in the 2.4 GHz band. To practically meet these goals the WiSpy SSM Tool was produced, which includes two applications (WiSpy SSM Collector and WiSpy SSM Compiler) and an webservice. Multiple WiSpy SSM Collector applications are deployed in the area under investigation and collect signal data using a WiSpy spectrum analyser connected to a computer. The collected data is transmitted to the webservice and stored in a database. The WiSpy SSM Compiler retrieves stored information and displays this to the user in a simple and easy to understand manner for interpretation. The results obtained from the WiSpy SSM Compiler were conclusive in that by using three spectrum analysers we were able to locate Wi-Fi devices fairly accurately.

Honours Project Downloads

Check some screenshots of the WiSpy SSM Tool in action

Computer Graphics Project

For interest, comments or simply wanting to find out more about my honours project, find me, under people, on the Computer Science website below

Dan Wells
Department of Computer Science
Rhodes University
South Africa

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