Weighted cyclic prefix OFDM: PAPR analysis and performances comparison with DFT-precoding

Damien Roque (1, 2) , Cyrille Siclet (2) , Jean-Marc Brossier (2) , Pierre Siohan (3)

1 Direction générale de l'Armement (DGA)
2 GIPSA-CICS - GIPSA - Communication Information and Complex Systems
3 Orange Labs R&D [Rennes]

In this paper, we present a weighted cyclic prefix orthogonal frequency-division multiplexing (WCP-OFDM) transceiver as a generalization of traditional cyclic prefix (CP)-OFDM. In time-variant channels, this multicarrier transmission scheme may mitigate inter-channel interference (ICI) thanks to the use of non-rectangular pulse shapes. A precoding step may be required in order to reduce the peak-to-average power ratio (PAPR) at the transmitter output. For instance, a discrete Fourier transform (DFT) precoder leads to a single carrier transmission scheme with frequency domain equalization. We analyze the consequences of such a precoding, in terms of performances, in the context of a time-frequency selective channel.

Domaines: Traitement du signal et de l'image [eess.SP]; Traitement du signal et de l'image [eess.SP]

Damien Roque, Cyrille Siclet, Jean-Marc Brossier, Pierre Siohan. Weighted cyclic prefix OFDM: PAPR analysis and performances comparison with DFT-precoding. ACSSC 2012 - 46th Annual Asilomar Conference on Signals Systems and Computers, Nov 2012, Pacific Grove, United States. pp.n/a. ⟨hal-00790006⟩