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24065 Peak-to-average power reduction by rotation of the time-frequency representation
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Korevaar, C.W. and de Boer, P.T. and Kokkeler, A.B.J. and Smit, G.J.M. (2013) Peak-to-average power reduction by rotation of the time-frequency representation. In: Proceedings of the IEEE Global Communications Conference, GLOBECOM 2013, 9-13 Dec 2013, Atlanta, GA, USA. pp. 3722-3727. IEEE Communications Society. ISSN 1930-529X ISBN 978-1-4799-1353-4

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Multi-carrier communication is associated with a high peak-to-average power ratio (PAPR). A new PAPR reduction method is proposed which is based on rotating the time-frequency representation of a transmit signal, prior to transmission. In general, a time-frequency rotation of a multi-carrier signal would change the signal basis, affecting the robustness of the transmit signal in fading channels. Exceptions are transmit signals constructed by (modulated) Hermite functions. The PAPR has been analyzed for transmit signals based on 64 Hermite functions. Allowing a rotation over 16 angles in time-frequency, the PAPR, which occurs with a probability of 0.001, is reduced by 3.8 dB at the cost of an increased computational complexity and a minor loss in spectral efficiency.

Item Type:Conference or Workshop Paper (Full Paper, Talk)
Research Group:EWI-CAES: Computer Architecture for Embedded Systems, EWI-DACS: Design and Analysis of Communication Systems
Research Program:CTIT-WiSe: Wireless and Sensor Systems
Research Project:TSP: Tracking, tracing, Sensoring Platform
Uncontrolled Keywords:papr reduction, crest factor, time-frequency analysis, time-frequency rotations, hermite functions, ofdm
ID Code:24065
Deposited On:21 May 2015
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