MIMO wireless communication system
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United States of America Patent
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Jul 11, 2017
Grant Date -
Jul 30, 2015
app pub date -
Apr 8, 2015
filing date -
Jan 21, 2013
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Abstract
In a LTE-based wireless communication system, a first user (UEB) in a first cell (Cell A) may experience significant interference from downlink transmissions in a second cell (Cell B). Interference can be reduced by selecting a precoder for downlink transmission to a second user (UEA) in the first cell which will result in reduced interference to the first user (UEB) after the first user (UEB) is handed-over to the second cell. The uplink/downlink channel reciprocity in TDD systems and the new transmission mode TM9 in LTE Release 10 are exploited to obtain channel information and determine precoding. After handover to the second cell, a resource allocation (RBB) to the first user (UEB) is notified to the first cell. In the first cell, the second user (UEA) receives the same resource allocation and a precoder selected to reduce interference to the first user.
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