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Filter design for 5G BF-OFDM waveform


A flexible and efficient use of the frequency resource is a key challenge for future wireless technologies. The new requirements are not satisfied by the CP-OFDM which has motivated the research on alternative waveforms. Recently, Block-Filtered OFDM modulation scheme has been proposed. This waveform addresses most of the CP-OFDM's drawbacks at the price of a slight complexity increase of the transmitter. The scheme is based on a filter-bank, a precoding stage that ensures the Near Perfect Reconstruction property and a pre-compensation stage which avoids filtering at the receiver. In this paper, the filter specifications for BF-OFDM are derived and an optimization method based on self-interference rejection is proposed. Optimized filter shape can provide up to 70 dB of Signal-to-Interference Ratio which justifies the Near Perfect Reconstruction property with an enhanced spectral confinement and no channel performance degradation.
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hal-02470374 , version 1 (07-02-2020)



David Demmer, Robin Gerzaguet, Jean-Baptiste Doré, Didier Le Ruyet, Dimitri Kténas. Filter design for 5G BF-OFDM waveform. 2017 European Conference on Networks and Communications (EuCNC), Jun 2017, Oulu, France. pp.1-5, ⟨10.1109/EuCNC.2017.7980688⟩. ⟨hal-02470374⟩
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