Method, apparatus and communication unit
AssigneeIntel Deutschland GmbH
InventorFrank Dietrich
Life of this patent
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Abstract
A method, an apparatus and a communication unit for generating precoding feedback information in a multiple frequency radio transmission system are disclosed. A rank for precoding matrices, wherein the rank is constant over the multiple frequencies, is selected and a plurality of precoding matrices having the selected rank are selected. A different precoding matrix is selected for each frequency subset of the multiple frequencies.
Claims20
One or more non-transitory, computer-readable media having instructions that, when executed, cause a first device to:
- generate first feedback information to provide an indication of a wideband precoding matrix for a frequency band, the first feedback information to be fed back to a second device;
- generate second feedback information to provide an indication of a narrowband precoding matrix for a subset of frequencies of the frequency band, the second feedback information to be fed back to the second device;
- and
- process a modulated data stream transmitted by the second device, wherein the modulated data stream is transmitted based on the wideband precoding matrix or the narrowband precoding matrix.
An apparatus comprising:
- wideband precoding matrix selector circuitry to select a wideband precoding matrix for a frequency band;
- narrowband precoding matrix selector circuitry to select a narrowband precoding matrix for a subset of frequencies of the frequency band;
- transmit circuitry to cause indications of the wideband precoding matrix and the narrowband precoding matrix to be transmitted to another apparatus;
- and
- receive circuitry process a modulated data stream transmitted by the device, wherein the modulated data stream is transmitted based on the wideband precoding matrix or the sub-band precoding matrix.
One or more non-transitory, computer-readable media having instructions that, when executed, cause a first device to:
- determine, based on channel estimates, a wideband precoding matrix for a frequency band;
- determine a narrowband precoding matrix for a subset of frequencies of the frequency band;
- generate one or more transmissions to transmit indications of the wideband precoding matrix and the narrowband precoding matrix to a second device;
- and
- means for receiving a data stream transmitted based on the wideband precoding matrix or the narrowband precoding matrix.
Dependencies are inferred from the claim text.