EN FR
EN FR


Section: New Results

Activities on Waveform Design for Telecommunications

Peak to Average Power Ratio (PAPR), Orthogonal Frequency Division Multiplexing (OFDM), Generalized Waveforms for Multi Carrier (GWMC), Adaptive Wavelet Packet Modulation (AWPM)

Characterizing and designing multi-carrier waveform systems with optimum PAPR

Participant : Rémi Gribonval.

Main collaboration: Marwa Chafii, Jacques Palicot, Carlos Bader (SCEE team, CentraleSupelec, Rennes)

In the context of the TEPN (Towards Energy Proportional Networks) Comin Labs project (see Section 9.1.1.2), in collaboration with the SCEE team at Supelec (thesis of Marwa Chafii [58], defended in October 2016 and co-supervised by R. Gribonval), we investigated a problem related to dictionary design: the characterization of waveforms with low Peak to Average Power Ratio (PAPR) for wireless communications. This is motivated by the importance of a low PAPR for energy-efficient transmission systems.

A first stage of the work consisted in characterizing the statistical distribution of the PAPR for a general family of multi-carrier systems, leading to a journal paper [62] and several conference communications [60], [61]. Our characterization of waveforms with optimum PAPR [63] has been published in a journal in 2016 [59]. Our work on the design of new adaptive multi-carrier waveform systems able to cope with frequency-selective channels while minimizing PAPR which gave rise to a patent in 2016 [64] has been been submitted for publication as a journal paper. Our study of the tradeoffs between PAPR and Power Spectral Density properties of a wavelet modulation scheme has been published this year [14].