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1. (WO2018010808) METHOD AND APPARATUS FOR MODULO-LATTICE NON-ORTHOGONAL MULTIPLE ACCESS FOR OVERLOADED MISO SYSTEMS

Pub. No.:    WO/2018/010808    International Application No.:    PCT/EP2016/066832
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 MODULO-LATTICE NON-ORTHOGONAL MULTIPLE ACCESS FOR OVERLOADED MISO SYSTEMS
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 multiple-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 and a linear filter computation based on the channel state information are jointly designed to meet a prescribed fairness constraint. The computed linear filter is adapted to balance interference caused to each user by the users being served at identical resources and is then used through an intra-carrier lattice-based non-linear precoding to mitigate the interference and also through a linear precoding to output a signal to be transmitted on the respective carrier towards each user. At the receiver side, the plurality of messages is finally recovered thanks to a simple single-user decoder.