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1. (WO2018010807) METHOD AND APPARATUS FOR LATTICE-BASED NON-LINEAR PRECODING FOR NON-ORTHOGONAL MULTIPLE ACCESS

Pub. No.:    WO/2018/010807    International Application No.:    PCT/EP2016/066831
Publication Date: Fri Jan 19 00:59:59 CET 2018 International Filing Date: Fri Jul 15 01:59:59 CEST 2016
IPC: H04W 52/34
H04W 52/42
Applicants: HUAWEI TECHNOLOGIES CO., LTD.
BENAMMAR, Meryem
ESTELLA AGUERRI, Inaki
ZAIDI, Abdellatif
BELFIORE, Jean-Claude
Inventors: BENAMMAR, Meryem
ESTELLA AGUERRI, Inaki
ZAIDI, Abdellatif
BELFIORE, Jean-Claude
Title: METHOD AND APPARATUS FOR LATTICE-BASED NON-LINEAR PRECODING FOR NON-ORTHOGONAL MULTIPLE ACCESS
Abstract:
The present invention relates to a wireless communication system for downlink transmitting, through a plurality of orthogonal carriers and according to a non-orthogonal multiple access transmission scheme in a single-input single-output configuration, a plurality of messages towards, respectively, a plurality of users. At the transmitter side, a power allocation strategy subjected to a total power budget constraint is implemented to meet a prescribed fairness constraint. The interference caused to each other by the users served at identical resources is efficiently mitigated through an intra-carrier lattice-based non-linear precoding process operating sequentially and taking account of the power allocation strategy, the users' ordering and the channel state information of each channel linking the respective carrier to each user. At the receiver side, the plurality of messages is respectively recovered by each user thanks to a respective simple single-user decoder, which decodes only its intended signal without requiring any successive interference cancellation procedure.