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US 8,428,633 B2Granted
Combined channel state information and combined channel quality indicator in wireless communication systems
AssigneeIntel Corporation
InventorsYuan Zhu, Qinghua Li, Xiaogang Chen
Life of this patent
Estimating the term…
Abstract
Embodiments of methods and apparatus for estimating a channel state information (CSI) and a channel quality indicator (CQI) of a frame; determining a combined CSI and a combined CQI of the frame; and transmitting the CSI and the combined CQI are disclosed. Additional variants and embodiments are also disclosed.
Claims16
A method comprising:
- receiving a first frame by a wireless transmission;
- estimating a channel state information (CSI) and a channel quality indicator (CQI) of the first frame;
- determining a combined CSI of the first frame based at least in part on:
- the CSI of the first frame and a CSI of a second frame that was received prior to receiving the first frame;
- and an estimation of a Doppler spread of a communication channel between a base station and a user equipment;
- determining a combined CQI of the first frame based at least in part on the CQI of the first frame and the combined CSI, wherein said determining the combined CQI includes:
- determining an angle between the combined CSI and the CSI of the first frame;
- and determining the combined CQI as a ratio of the CQI of the first frame and a square of a cosine of the determined angle;
- and
- transmitting the CSI of the first frame and the combined CQI.
7 more elements
A method comprising:
- transmitting a plurality of frames including a first frame and a second frame that is transmitted prior to transmitting the first frame;
- receiving a channel state information (CSI) and a combined channel quality indicator (CQI) of the first frame;
- determining a combined CSI of the first frame based at least in part on:
- the CSI of the first frame and a CSI of the second frame;
- and
- an estimation of a Doppler spread of a communication channel between a base station and a user equipment;
- and
- determining a beamforming matrix based at least in part on the determined combined CSI and the received combined CQI,
- wherein determining the combined CSI of the first frame further includes:
- if the estimated Doppler spread is higher than a threshold value, determining the combined CSI to be equal to the CSI of the first frame;
- and
- if the estimated Doppler spread is lower than the threshold value, determining the combined CSI to be a weighted average of the CSI of the first frame and the CSI of the second frame.
9 more elements
A mobile station comprising:
- a receiver configured to receive a first frame and one or more other frames that are received prior to receiving the first frame;
- a channel state information (CSI) module configured to estimate a CSI of the first frame and CSIs of the one or more other frames;
- and
- a CSI combination module configured to determine a combined CSI of the first frame based at least in part on an estimation of a Doppler spread of a wireless channel between a base station and the mobile station.
1 more element
Dependencies are inferred from the claim text.