Efficient rank and precoding matrix feedback for MIMO systems
First Claim
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1. A user equipment, comprising:
- a receiver configured to receive transmissions from multiple antennas;
a rank feedback unit configured to provide a transmission rank selection, wherein the transmission rank selection corresponds to a transmission rank feedback reduction scheme; and
a precoding feedback unit configured to provide a precoding matrix selection, wherein the precoding matrix selection corresponds to a precoding matrix feedback reduction scheme and wherein the precoding matrix selection is restricted to a subset of available precoding matrices that is received via higher layer signaling or user equipment-determined.
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Abstract
The present disclosure provides a receiver, a transmitter and methods of operating a receiver or a transmitter. In one embodiment, the receiver includes a receive unit configured to receive transmissions from multiple antennas. The receiver also includes a rank feedback unit configured to feed back a transmission rank selection, wherein the transmission rank selection corresponds to a transmission rank feedback reduction scheme. The receiver further includes a precoding feedback unit configured to feed back a preceding matrix selection, wherein the preceding matrix selection corresponds to a preceding matrix feedback reduction schemes.
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Citations
20 Claims
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1. A user equipment, comprising:
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a receiver configured to receive transmissions from multiple antennas; a rank feedback unit configured to provide a transmission rank selection, wherein the transmission rank selection corresponds to a transmission rank feedback reduction scheme; and a precoding feedback unit configured to provide a precoding matrix selection, wherein the precoding matrix selection corresponds to a precoding matrix feedback reduction scheme and wherein the precoding matrix selection is restricted to a subset of available precoding matrices that is received via higher layer signaling or user equipment-determined.
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2. A user equipment, comprising:
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a receiver configured to receive transmissions from multiple antennas; a rank feedback unit configured to provide a transmission rank selection, wherein the transmission rank selection corresponds to a transmission rank feedback reduction scheme; and a precoding feedback unit configured to provide a precoding matrix selection, wherein the precoding matrix selection corresponds to a precoding matrix feedback reduction scheme and wherein the precoding matrix selection corresponds to a subset of preceding matrices that relates to a reference precoding matrix. - View Dependent Claims (3, 4)
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5. A user equipment, comprising:
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a receiver configured to receive transmissions from multiple antennas; a rank feedback unit configured to provide a transmission rank selection, wherein the transmission rank selection corresponds to a transmission rank feedback reduction scheme; and a preceding feedback unit configured to provide a preceding matrix selection, wherein the precoding matrix selection corresponds to a preceding matrix feedback reduction scheme and wherein the preceding matrix selection is a differential preceding matrix that corresponds to a difference between a current preceding matrix and a reference preceding matrix.
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6. A method of operating a user equipment, comprising:
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receiving transmissions from multiple antennas; feeding back a transmission rank selection, wherein the transmission rank selection corresponds to a transmission rank feedback reduction scheme; and feeding back a preceding matrix selection, wherein the preceding matrix selection corresponds to a preceding matrix feedback reduction scheme and wherein the preceding matrix selection is restricted to a subset of available preceding matrices that is received via higher layer signaling or user equipment-determined.
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7. A method of operating a user equipment, comprising:
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receiving transmissions from multiple antennas; feeding back a transmission rank selection, wherein the transmission rank selection corresponds to a transmission rank feedback reduction scheme; and feeding back a preceding matrix selection, wherein the preceding matrix selection corresponds to a preceding matrix feedback reduction scheme and wherein the preceding matrix selection corresponds to a subset of preceding matrices that relates to a reference preceding matrix. - View Dependent Claims (8, 9)
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10. A method of operating a user equipment, comprising:
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receiving transmissions from multiple antennas; feeding back a transmission rank selection, wherein the transmission rank selection corresponds to a transmission rank feedback reduction scheme; and feeding back a precoding matrix selection, wherein the precoding matrix selection corresponds to a precoding matrix feedback reduction scheme and wherein the precoding matrix selection is a differential precoding matrix that corresponds to a difference between a current precoding matrix and a reference precoding matrix.
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11. A base station comprising:
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a receiver that receives a feedback signal; a rank decoder configured to extract a transmission rank selection from the received feedback signal, wherein the transmission rank selection corresponds to a transmission rank feedback reduction scheme; a precoding decoder configured to extract a precoding matrix selection, wherein the precoding matrix selection corresponds to a precoding matrix feedback reduction scheme, wherein the precoding matrix selection is restricted to a subset of available precoding matrices that is sent via higher layer signaling or remotely-determined; and a transmitter coupled to multiple antennas and configured to apply the transmission rank and precoding matrix selections to data to be transmitted.
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12. A base station comprising:
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a receiver that receives a feedback signal; a rank decoder configured to extract a transmission rank selection from the received feedback signal, wherein the transmission rank selection corresponds to a transmission rank feedback reduction scheme; a precoding decoder configured to extract a precoding matrix selection, wherein the precoding matrix selection corresponds to a precoding matrix feedback reduction scheme, wherein the precoding matrix selection corresponds to a subset of precoding matrices that relates to a reference precoding matrix; and a transmitter coupled to multiple antennas and configured to apply the transmission rank and precoding matrix selections to data to be transmitted. - View Dependent Claims (13, 14)
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15. A base station comprising:
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a receiver that receives a feedback signal; a rank decoder configured to extract a transmission rank selection from the received feedback signal, wherein the transmission rank selection corresponds to a transmission rank feedback reduction scheme; a precoding decoder configured to extract a precoding matrix selection, wherein the precoding matrix selection corresponds to a precoding matrix feedback reduction scheme, wherein the precoding matrix selection is a differential precoding matrix that corresponds to a difference between a current precoding matrix and a reference precoding matrix; and a transmitter coupled to multiple antennas and configured to apply the transmission rank and precoding matrix selections to data to be transmitted.
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16. A method of operating a base station comprising:
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receiving a feedback signal; extracting a transmission rank selection from the received feedback signal, wherein the transmission rank selection corresponds to a transmission rank feedback reduction scheme; extracting a precoding matrix selection, wherein the precoding matrix selection corresponds to a precoding matrix feedback reduction scheme, wherein the precoding matrix selection is restricted to a subset of available precoding matrices that is sent via higher layer signaling or remotely-determined; and applying the transmission rank and preceding matrix selections data to be transmitted.
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17. A method of operating a base station comprising:
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receiving a feedback signal; extracting a transmission rank selection from the received feedback signal, wherein the mission rank selection corresponds to a transmission rank feedback reduction scheme; extracting a preceding matrix selection, wherein the precoding matrix selection corresponds to a precoding matrix feedback reduction scheme, wherein the precoding matrix selection corresponds to a subset of preceding matrices that relates to a reference precoding matrix; and applying the transmission rank and preceding matrix selections to data to be transmitted. - View Dependent Claims (18, 19)
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20. A method of operating a base station comprising:
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receiving a feedback signal; extracting a transmission rank selection from the received feedback signal, wherein the transmission rank selection corresponds to a transmission rank feedback reduction scheme; extracting a precoding matrix selection, wherein the precoding matrix selection corresponds to a precoding matrix feedback reduction scheme, wherein the precoding matrix selection is a differential precoding matrix that corresponds to a difference between a current precoding matrix and a reference precoding matrix; and applying the transmission rank and precoding matrix selections to data to be transmitted.
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Specification