Feedback Framework for MIMO Operation in Heterogeneous Communication Network
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United States of America Patent
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app pub date -
Jul 5, 2011
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Jul 5, 2011
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Abstract
There is provided a mechanism providing a flexible feedback framework operating in different scenarios, such as heterogeneous network deployments. Antenna information are sent from a scheduler element to a UE, the antenna information including information indicating a grouping of one or more antenna in closely spaced antenna groups of one or more transmit points. The UE selects at least one of precoding codewords and amplitude weight parameters for each closely spaced antenna group, and determines information related to a sub-band precoder and a transmit point related combiner. The processing results are indicated to the scheduler by means of sending indices related to a wide-band long-term precoder and a sub-band short-term precoder. The scheduler processes these results for determining a joint precoder.
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