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

A4 Konferenspublikationer


Interna författare/redaktörer


Publikationens författare: Grönroos Stefan, Nybom Kristian, Björkqvist Jerker
Redaktörer: Pucker Lee, Glossner John, Hamill Stephanie
Publiceringsår: 2015
Förläggare: Wireless Innovation Forum
Moderpublikationens namn: Proceedings of SDR-WinnComm 2015: Wireless Innovation Conference on Wireless Communications Technologies and Software Defined Radio
Artikelns första sida, sidnummer: 223
Artikelns sista sida, sidnummer: 229


Abstrakt

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.


Nyckelord

Geolocation, Spectrum sensing

Senast uppdaterad 2019-14-11 vid 01:55