Filter Design for Full-Duplex Multiuser Systems Based on Single-Carrier Transmission in Frequency-Selective Channels

Kyohei AMANO

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E104-A    No.1    pp.235-242
Publication Date: 2021/01/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.2020WBP0001
Type of Manuscript: Special Section PAPER (Special Section on Wideband Systems)
full-duplex,  multiuser systems,  beamforming,  inter-symbol interference,  inter-user interference,  self-interference,  co-channel interference,  

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In this paper, we consider interference suppression for a full-duplex (FD) multiuser system based on single-carrier transmission in frequency-selective channels where a FD base-station (BS) simultaneously communicates with half-duplex (HD) uplink and downlink mobile users. We propose a design method for time-domain filtering where the filters in the BS transmitter suppress inter-symbol interference (ISI) and downlink inter-user interference (IUI); those in the BS receiver, self-interference, ISI, and uplink IUI; and those in the downlink mobile users, co-channel interference (CCI) without the channel state information of the CCI channels. Simulation results indicate that the FD system based on the proposed method outperforms the conventional HD system and FD system based on multicarrier transmission.