Open AccessInterference diversity gains via adaptive block‐diagonalisation for multiuser MIMO downlinks
Author(s) -
Masouros C.,
Alsusa E.
Publication year - 2013
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2012.4289
Subject(s) - precoding , beamforming , mimo , telecommunications link , overhead (engineering) , computer science , block (permutation group theory) , relaxation (psychology) , diversity gain , interference (communication) , transmitter , adaptive beamformer , control theory (sociology) , electronic engineering , algorithm , mathematical optimization , mathematics , telecommunications , engineering , artificial intelligence , social psychology , psychology , channel (broadcasting) , geometry , control (management) , operating system
Proposed is an adaptive fully transmitter‐based block‐diagonalisation scheme for multiple input multiple output (MIMO) multiuser downlink systems. A relaxation to the beamforming optimisation constraints is proposed, which introduces interference diversity and attains a more efficient performance optimisation. The trade‐off to the performance improvement is an increase in the precoding complexity imposed by the adaptive nature of the proposed beamforming. A sub‐optimal adaptive‐decomposition beamforming scheme is also proposed with a reduced complexity overhead. Comparative analytical and simulation results to conventional beamforming demonstrate the significant diversity gains offered by the proposed scheme.