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Correcting for local oscillator phase offset in a DVB-T compliant receiver under multipath conditions

Linfoot, S.L. and Sherratt, R. S. (2000) Correcting for local oscillator phase offset in a DVB-T compliant receiver under multipath conditions. IEEE Transactions on Consumer Electronics, 46 (2). pp. 306-312. ISSN 0098-3063

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To link to this article DOI: 10.1109/30.846662

Abstract/Summary

In 1997, the UK implemented the worlds first commercial digital terrestrial television system. Under the ETS 300 744 standard, the chosen modulation method, COFDM, is assumed to be multipath resilient. Previous work has shown that this is not necessarily the case. It has been shown that the local oscillator required for demodulation from intermediate-frequency to baseband must be very accurate. This paper shows that under multipath conditions, standard methods for obtaining local oscillator phase lock may not be adequate. This paper demonstrates a set of algorithms designed for use with a simple local oscillator circuit which will allow correction for local oscillator phase offset to maintain a low bit error rate with multipath present.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Science > School of Systems Engineering
ID Code:18854
Uncontrolled Keywords:BER, COFDM, DVB-T compliant receiver, ETS 300 744 standard, UK, baseband, commercial digital terrestrial television system, demodulation, intermediate-frequency, local oscillator circuit, local oscillator phase lock, local oscillator phase offset correction, low bit error rate, modulation method, multipath conditions
Publisher:IEEE Consumer Electronics Society

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