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Adaptive noise tracking for Cognitive Radios under more realistic operation conditions
Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för elektronik, matematik och naturvetenskap, Elektronik.
2014 (engelsk)Inngår i: IEEE Instrumentation and Measurement Technology Conference, 2014, s. 1339-1344Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

Normal operation conditions of cognitive radio applications require signal processing techniques that can be executed in real time. One of the first steps is to sense the occupied or free frequency channels. Two major drawbacks in the current techniques are that they assume (i) the noise as white and (ii) the measured spectrum as time-invariant. In real world, the noise is (i) colored so it disturbs the signal unevenly and (ii) its spectrum changes over time. Hence, tracking the time-varying noise spectrum can become crucial to remove the noise contributions and enhance the estimate of the received signal. In this paper, we study an auto-regressive model to develop an adaptive noise tracking technique using a Kalman filter such that an extension of Boll's noise subtraction technique, designed for audio noise cancellation, becomes feasible when adjusted to cognitive radio scenarios. Simulation results show the performance of this technique. 

sted, utgiver, år, opplag, sider
2014. s. 1339-1344
Serie
IEEE Instrumentation and Measurement Technology Conference, ISSN 1091-5281
Emneord [en]
auto-reg ressive model, cognitive radio, denoising, noise tracking, power spectrum, spectral subtraction, Kalman filters, Planning, Signal processing, Spurious signal noise, Sustainable development, Auto regressive models, De-noising, Noise cancellation, Noise contributions, Operation conditions, Signal processing technique, Spectral subtractions, Radio systems
HSV kategori
Identifikatorer
URN: urn:nbn:se:hig:diva-18459DOI: 10.1109/I2MTC.2014.6860964Scopus ID: 2-s2.0-84905686705ISBN: 978-146736385-3 (tryckt)OAI: oai:DiVA.org:hig-18459DiVA, id: diva2:770214
Konferanse
2014 IEEE International Instrumentation and Measurement Technology Conference: Instrumentation and Measurement for Sustainable Development, I2MTC 2014, 12-15 May 2014, Montevideo
Tilgjengelig fra: 2014-12-10 Laget: 2014-12-10 Sist oppdatert: 2018-03-13bibliografisk kontrollert

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