Cqi feedback for mimo deployments
AssigneeTexas Instruments Incorporated
InventorsBadri Varadarajan, Eko N. Onggosanusi
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Abstract
The present disclosure provides a receiver, a transmitter and methods of operating a receiver and a transmitter. In one embodiment, the receiver includes a receive portion employing transmission signals from a transmitter, having multiple transmit antennas, that is capable of transmitting at least one spatial codeword and adapting a transmission rank. The receiver also includes a feedback generator portion configured to provide a channel quality indicator that is feedback to the transmitter, wherein the channel quality indicator corresponds to at least one transmission rank.
Claims42
A receiver, comprising:
- a receive portion employing transmission signals from a transmitter having multiple transmit antennas that is capable of transmitting at least one spatial codeword and adapting a transmission rank;
- and
- a feedback generator portion configured to provide a channel quality indicator that is feedback to the transmitter, wherein the channel quality indicator corresponds to at least one transmission rank.
A method of operating a receiver, comprising:
- receiving transmission signals from a transmitter having multiple transmit antennas that is capable of transmitting at least one spatial codeword and adapting a transmission rank;
- and
- feeding back a channel quality indicator to the transmitter, wherein the channel quality indicator corresponds to at least one transmission rank.
A transmitter having multiple transmit antennas that is capable of transmitting at least one spatial codeword and adapting a transmission rank, comprising:
- a feedback decoding portion configured to extract a channel quality indicator provided by a feedback signal from a receiver;
- wherein the channel quality indicator corresponds to at least one transmission rank;
- and
- a transmit portion coupled to the multiple transmit antennas that provides a subsequent transmission based on the channel quality indicator.
A method of operating a transmitter having multiple transmit antennas that is capable of transmitting at least one spatial codeword and adapting a transmission rank, comprising:
- extracting a channel quality indicator provided by a feedback signal from a receiver;
- selecting a transmission rank and a modulation-coding scheme for a subsequent transmission in response to the decoded channel quality indicator feedback;
- selecting a user in response to the decoded channel quality indicator feedback;
- and
- generating the subsequent transmission with the multiple transmit antennas.
Dependencies are inferred from the claim text.