Wireless communication devices for adaptive beamforming and methods of operating the same
AssigneeSamsung Electronics Co., Ltd.
InventorsEun-sung Jeon, Joon-suk Kim, Sung-soo Kim, Jung-woon Lee
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Abstract
Methods of operating a wireless communication device for adaptive beamforming of a base station according to a state of a channel are provided. The methods include receiving a sounding packet from the base station through the channel; obtaining channel quality about the channel, using the sounding packet; selecting a feedback mode out of a plurality of feedback modes based on the channel quality; generating a matrix to be a basis of the adaptive beamforming, based on the selected feedback mode; and transmitting channel state information including information on the matrix to the base station.
Claims18
A method of operating a wireless communication device for adaptive beamforming of a base station according to a state of a channel, the method comprising:
- receiving a sounding packet from the base station through the channel;
- obtaining channel quality information about the channel using the sounding packet;
- selecting a feedback mode out of a plurality of feedback modes based on the channel quality information;
- generating a matrix as a basis of the adaptive beamforming, based on the selected feedback mode;
- and
- transmitting channel state information including information on the matrix to the base station,
- wherein the selecting of a feedback mode comprises:
- predicting performance of the wireless communication device corresponding to each of the feedback modes under condition of the channel quality information;
- comparing the predicted performances of the wireless communication device with each other to provide a comparison result;
- and
- selecting the feedback mode for generating the matrix based on the comparison result.
A method of operating a wireless communication device for adaptive beamforming of a base station according to a state of a channel, the method comprising:
- generating a diagonal matrix that comprises singular values and a beamforming matrix from a channel matrix by performing singular value decomposition of the channel matrix corresponding to the channel;
- reading trigonometric values corresponding to a ratio of the singular values from a lookup table stored in a memory of the wireless communication device;
- generating a beamforming steering matrix by a multiplication computation of a rotation matrix generated by using the read trigonometric values and the beamforming matrix;
- and
- transmitting channel state information comprising information on the beamforming steering matrix to the base station.
A method of beamforming in a wireless communication system comprising a base station and a wireless communication device, the method comprising:
- receiving, by the wireless communication device, a sounding packet from the base station through a channel;
- transmitting, by the wireless communication device, information on a matrix generated based on a feedback mode selected according to channel quality of the channel to the base station;
- and
- receiving, by the wireless communication device, a data signal processed based on the beamforming according to the information on the matrix from the base station through the channel,
- wherein selecting a feedback mode comprises:
- predicting performances of the wireless communication device respectively corresponding to a plurality of feedback modes under a condition of the channel quality;
- comparing the predicted performances of the wireless communication device with each other to provide a comparison result;
- and
- selecting one of the plurality of feedback modes based on the comparison result.
Dependencies are inferred from the claim text.