ITERATIVE INTERFERENCE ALIGNMENT (IA) METHOD AND APPARATUS FOR PERFORMING DOWNLINK MULTI-USER MULTIPLE-INPUT AND MULTIPLE-OUTPUT (DL MU-MIMO) COMMUNICATION
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United States of America Patent
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Issued Date -
Dec 24, 2015
app pub date -
Jun 23, 2015
filing date -
Jun 24, 2014
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Abandoned
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Abstract
Provided is an iterative interference alignment (IA) method and apparatus for performing a downlink multi-user multiple-input and multiple-output (DL MU-MIMO), including transmitting, to a user terminal, a transmission beamforming vector generated arbitrarily, receiving, from the user terminal, a reception beamforming vector calculated to minimize interference based on the transmission beamforming vector, and updating the transmission beamforming vector based on the reception beamforming vector, the iterative IA method may further include calculating a transmission beamforming vector space minimizing interference of an inter-basic service set based on the reception beamforming vector, calculating a transmission beamforming matrix minimizing interference of an intra-basic service set, based on the reception beamforming vector, and updating the transmission beamforming vector based on the transmission beamforming matrix and the transmission beamforming vector space.
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