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SDR Implementation of a Testbed for Real-Time Interference Detection With Signal Cancellation
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2018 (English)In: IEEE Access, E-ISSN 2169-3536, Vol. 6, p. 20807-20821Article in journal (Refereed) Published
Abstract [en]

Interference greatly affects the quality of service of wireless and satellite communications, having also a financial impact for the telecommunication operators. Therefore, as the interfering events increase due to the deployment of new services, there is an increasing demand for the detection and mitigation of interference. There are several interference detectors in the literature, evaluated by using extensive simulations. However, this paper goes one step further, designing, implementing, and evaluating the performance of the developed interference detection algorithms experimentally using a software defined radio, and particularly the universal software radio peripheral platform. A realistic communication system is implemented, consisting of a transmitter, a channel emulator, and a receiver. Based on this system, we implement all the appropriate communications features, such as pulse shaping, synchronization, and demodulation. The real-time system implementation is validated and evaluated through signal and interference detection. We observe that the interference detection threshold is critical to the functioning of the system. Several existing interference detection techniques fail in practice due to this fact. In this paper, we propose a robust and practically implementable method, the selection of threshold. Finally, we present real-time experimental results for the probabilities of false alarm and detection in order to verify the accuracy of our study and reinforce our theoretical analysis.

Place, publisher, year, edition, pages
2018. Vol. 6, p. 20807-20821
Keywords [en]
Communication systems;Detectors;Interference;Real-time systems;Receivers;Signal processing algorithms;Transmitters;SDR;USRP;interference detection;real-time testbed;satellite
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:kth:diva-258967DOI: 10.1109/ACCESS.2018.2825885ISI: 000431632600001Scopus ID: 2-s2.0-85045748125OAI: oai:DiVA.org:kth-258967DiVA, id: diva2:1350564
Note

QC 20191028

Available from: 2019-09-11 Created: 2019-09-11 Last updated: 2019-10-29Bibliographically approved

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Ottersten, Björn
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CiteExportLink to record
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