Filter-bank OFDM transceivers for 5G and beyond

David Demmer (1) , Rostom Zakaria (2) , Jean-Baptiste Doré (1) , Robin Gerzaguet (3) , Didier Le Ruyet (2)

1 CEA-LETI - Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information
2 CEDRIC - LAETITIA - CEDRIC. Traitement du signal et architectures électroniques
3 IRISA - Institut de Recherche en Informatique et Systèmes Aléatoires

5G paves the way to service-centric adaptationradio link. The transmitted signal is now configured accordingto the service it provides and the propagation impairments itsuffers from. However, in 5G the multi-service multiplexing leadsto a poor bandwidth use. Indeed, CP-OFDM is responsible forlarge out-of-band emission and therefore large guard bands arerequired between bands of different numerologies. In this paper,the authors investigate the use of filter-bank based waveforms asan alternative of legacy CP-OFDM. Such waveforms prove to bean enabling technology for an efficient multi-service multiplexing.Moreover, it is possible to configure a unique filtering stage,i.e. the PolyPhase-Network, to simultaneously address differentnumerologies in the same system bandwidth. This result wouldease the support of real-time numerology adaptation as one basestation could provide different services in the same cell. Thispaper is rather dedicated on the study of BF-OFDM which is afilter-bank based waveform which relies on a 5G NR OFDMreceiver. Nonetheless the waveform provides great results onthe considered evaluation scenarios for a reasonable complexityincrease.

Domains: Engineering Sciences [physics]; Signal and Image processing

David Demmer, Rostom Zakaria, Jean-Baptiste Doré, Robin Gerzaguet, Didier Le Ruyet. Filter-bank OFDM transceivers for 5G and beyond. 2018 52nd Asilomar Conference on Signals, Systems, and Computers, Oct 2018, Pacific Grove, France. pp.1057-1061, ⟨10.1109/ACSSC.2018.8645104⟩. ⟨hal-02470279⟩