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|1. (WO2018126291) IMPROVEMENTS TO A MULTI-USER MIMO-OFDM SYSTEM|
|Applicants:||COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION
|Inventors:||SUNG, Chang Kyung
HUMPHREY, David Eric
|Title:||IMPROVEMENTS TO A MULTI-USER MIMO-OFDM SYSTEM|
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.