Precoder and precoding method in a multi-antenna system
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United States of America Patent
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Jun 19, 2012
Grant Date -
Jul 31, 2008
app pub date -
Jan 29, 2008
filing date -
Jan 29, 2007
priority date (Note) -
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Abstract
A precoder and a precoding method in a multiuser multi-antenna system are provided. The precoder includes a channel checker for determining a DownLink (DL) channel condition of terminals in a service coverage area, a pre-compensator for pre-compensating, for channel distortion, signals to be sent to the terminals when a nonlinear algorithm is selected based on the channel condition of the terminals, and an interference remover for canceling interference in a channel by multiplying the pre-compensated signals by inverse channels of the terminals, and for canceling interference between the terminals. Accordingly, the pre-equalization can be carried out without global channel state information, and an increase of the transmit power can be prevented in the permutation.
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