Interference alignment based precoding method for reducing bandwidth of the backhaul network
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United States of America Patent
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Jan 23, 2018
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Feb 21, 2013
filing date -
Jan 11, 2013
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Abstract
A method and a first radio node for determining a first precoder to be used by the first radio node for sending a transmission to a second radio node. The first radio node measures a set of cross-channel responses. The first radio node encodes the set of cross-channel responses into a first code-book index using a quantization scheme. The first radio node sends the first code-book index to a central unit. The first radio node receives a second code-book index from the central unit. The first radio node obtains a second precoder by decoding the second code-book index. The first radio node determines the first precoder by compensating the second precoder while taking the quantization scheme and the co-operative interference mitigation scheme into account. The first radio node applies the first precoder to the transmission, to be sent by the first radio node, to the second radio node.
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