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US 8,457,235 B2Granted
Method of transmitting feedback data in multiple antenna system
AssigneeLG Electronics Inc.
InventorsHyun Soo Ko, Bin Chul Ihm, Jin Young Chun, Wook Bong Lee, Jae Hoon Chung, Sung Ho Park, Jin Hyuk Jung, Moon Il Lee
Life of this patent
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Abstract
A method of transmitting feedback data in a multiple antenna system includes generating feedback data based on the channel information and transmitting the feedback data at transmission periods, wherein the feedback data is transmitted in a plurality of report types respectively having a different control signal type contained depending on the transmission periods.
Claims7
A method for communicating with a base station (BS) in a multiple antenna system, the method performed by a user equipment (UE) and comprising:
- receiving a request message for requesting feedback data;
- generating the feedback data that includes a precoding matrix indicator (PMI) indicating a first precoding matrix in response of the request message;
- transmitting the generated feedback data;
- receiving an acknowledgement (ACK) message for the feedback data;
- receiving downlink data multiplied by a second precoding matrix;
- and
- decoding the downlink data based on the ACK message,
- wherein the first precoding matrix and the second precoding matrix are included in a codebook,
- wherein the ACK message indicates whether the second precoding matrix is identical to the first precoding matrix, and
- wherein the ACK message has a smaller bit size than a bit size required for indicating the second precoding matrix in the codebook.
7 more elements
Dependencies are inferred from the claim text.