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1. (WO2018126291) IMPROVEMENTS TO A MULTI-USER MIMO-OFDM SYSTEM

Pub. No.:    WO/2018/126291    International Application No.:    PCT/AU2017/050001
Publication Date: Fri Jul 13 01:59:59 CEST 2018 International Filing Date: Wed Jan 04 00:59:59 CET 2017
IPC: H04B 7/0452
H04B 7/0417
H04B 17/309
H04B 17/373
H04L 27/26
H04L 25/02
Applicants: COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION
Inventors: SUNG, Chang Kyung
KENDALL, Rodney
HUMPHREY, David Eric
SUZUKI, Hajime
Title: IMPROVEMENTS TO A MULTI-USER MIMO-OFDM SYSTEM
Abstract:
The present invention discloses various improvements to multi-user multiple-input multiple-output orthogonal frequency division multiplexing (MU-MIMO-OFDM) wireless communication systems. In one aspect there is disclosed an efficient and accurate channel estimation method and system using locally consecutive pilot sub-carriers. In another aspect there is disclosed an efficient channel feedback method and system by applying a discrete cosine transform to channel coefficients. In another aspect there is disclosed an efficient method and system to calculate a part of the channel inverse by interpolation. These aspects can be used in combination to improve the MU-MIMO-OFDM system.