Localized mode DFT-S-OFDMA implementation using frequency and time domain interpolation

Authors:
Ari Viholainen;Tero Ihalainen;Mika Rinne;Markku Renfors
Affiliations:
Department of Communications Engineering, Tampere University of Technology, Tampere, Finland;Department of Communications Engineering, Tampere University of Technology, Tampere, Finland;Nokia Research Center, Helsinki, Finland;Department of Communications Engineering, Tampere University of Technology, Tampere, Finland
Venue:
EURASIP Journal on Advances in Signal Processing
Year:
2009

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Abstract

This paper presents a novel method to generate a localized mode single-carrier frequency division multiple access (SC-FDMA) waveform. Instead of using DFT-spread OFDMA (DFT-S-OFDMA) processing, the new structure called SCiFI-FDMA relies on frequency and time domain interpolation followed by a user-specific frequency shift. SCiFI-FDMA can provide signal waveforms that are compatible to DFT-S-OFDMA. In addition, it provides any resolution of user bandwidth allocation for the uplink multiple access with comparable computational complexity, because the DFT is avoided. Therefore, SCiFI-FDMA allows a flexible choice of parameters appreciated in broadband mobile communications in the future.