RADIO BASE STATION, USER TERMINAL, RADIO COMMUNICATION METHOD AND RADIO COMMUNICATION SYSTEM
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United States of America Patent
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app pub date -
Dec 25, 2013
filing date -
Dec 28, 2012
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Abandoned
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Abstract
The present invention is designed to provide a radio base station, a user terminal, a radio communication method and a radio communication system of novel structures that can achieve improved throughput and system capacity. A radio base station transmits downlink reference signals that are specific to a plurality of transmission beams, a plurality of user terminals feed back channel state information acquired by channel estimation using the downlink reference signals, to the radio base station, the radio base station determines a plurality of user terminals to non-orthogonal-multiplex, per transmission beam, based on the channel state information that is fed back, and non-orthogonal-multiplexes downlink signals for the plurality of user terminals that are determined, in each of the plurality of transmission beams, and a plurality of user terminals that are determined, after having canceled interference between the transmission beams by means of a linear filter, demodulates downlink signals for the subject terminal, from the downlink signals that are non-orthogonal-multiplexed in each transmission beam.
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