Synchronization of Low-Cost Distributed Spectrum Sensing Nodes for Multilateration-Based Geolocation

A4 Conference proceedings

Internal Authors/Editors

Publication Details

List of Authors: Grönroos Stefan, Nybom Kristian, Björkqvist Jerker
Editors: Pucker Lee, Glossner John, Hamill Stephanie
Publication year: 2015
Publisher: Wireless Innovation Forum
Book title: Proceedings of SDR-WinnComm 2015: Wireless Innovation Conference on Wireless Communications Technologies and Software Defined Radio
Start page: 223
End page: 229


In this work, we show how a distributed sensing network consisting of very low-cost nodes can also be used to locate radio transmitters without prior knowledge of which waveform is used. This information can aid in increasing location awareness
among cognitive radios, as well as provide assistance in locating offending transmitters. The low accuracy of the internal clocks
of these low-cost receivers as well as the geographical distribution of the nodes result in significant challenges regarding the synchronization of the receivers in order to position the source with adequate accuracy. In this paper, we synchronize the nodes to an arbitrary modulated RF signal, after which we calculate estimated time differences of arrival (TDOAs) to an unknown
transmitter. We describe the implementation as well as give results on measurement accuracy in various scenarios using a prototype network of nodes spread out in the city of Turku, Finland.


Geolocation, Spectrum sensing

Last updated on 2020-24-09 at 06:02