Method of transmitting feedback data in a multiple antenna system
AssigneeLG Electronics Inc.
InventorsHyun Soo Ko, Bin Chul Ihm, Jin Young Chun, Wook Bong Lee, Moon Il Lee
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Abstract
A method of transmitting feedback data in a multiple antenna system comprises receiving a request message of feedback data on a downlink channel, the request message comprising uplink scheduling information, selecting a set of M (M≧1) subbands within a plurality of subbands, generating the feedback data, the feedback data comprising a frequency selective PMI (precoding matrix indicator), a frequency flat PMI, a best band CQI (channel quality indicator) and a whole band CQI, and transmitting the feedback data on a uplink channel allocated to the uplink scheduling information.
Claims12
A transmitter for transmitting feedback data in a multiple antenna system, the transmitter comprising:
- a processor configured to:
- receive a request message of feedback data on a downlink channel, the request message comprising uplink scheduling information;
- select a set of M subbands within a plurality of subbands, wherein M is greater than or equal to 1;
- generate the feedback data, the feedback data comprising a frequency selective precoding matrix indicator (PMI), a frequency flat PMI, a best band channel quality indicator (CQI) and a whole band CQI, the frequency selective PMI indicating an index of a precoding matrix selected from a codebook over the M selected subbands, the frequency flat PMI indicating an index of a precoding matrix selected from the codebook over the plurality of subbands, the best band CQI indicating a CQI value over the M selected subbands, the whole band CQI indicating a CQI value over the plurality of subbands;
- and
- transmit the feedback data on an uplink channel allocated to the uplink scheduling information.
A transmitter for transmitting feedback data in a multiple antenna system, the transmitter comprising:
- a processor configured to:
- select a set of M subbands within a plurality of subbands, wherein M is greater than or equal to 1;
- generate the feedback data, the feedback data comprising a frequency selective precoding matrix indicator (PMI), a frequency flat PMI, a best band channel quality indicator (CQI) and a whole band CQI, the frequency selective PMI indicating an index of a precoding matrix selected from a codebook over the M selected subbands, the frequency flat PMI indicating an index of a precoding matrix selected from the codebook over the plurality of subbands, the best band CQI indicating a CQI value over the M selected subbands, the whole band CQI indicating a CQI value over the plurality of subbands;
- and
- transmit the feedback data to a base station.
Dependencies are inferred from the claim text.