System and methods to compensate for Doppler effects in multi-user (MU) multiple antenna systems (MAS)
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United States of America Patent
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Apr 12, 2016
Grant Date -
Dec 13, 2012
app pub date -
May 4, 2012
filing date -
Apr 2, 2004
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Abstract
A system and methods are described which compensate for the adverse effect of Doppler on the performance of DIDO systems. One embodiment of such a system employs different selection algorithms to adaptively adjust the active BTSs to different UEs based by tracking the changing channel conditions. Another embodiment utilizes channel prediction to estimate the future CSI or DIDO precoding weights, thereby eliminating errors due to outdated CSI.
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