Overhead reduction for linear combination codebook and feedback mechanism in mobile communications
First Claim
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1. A method, comprising:
- receiving, by a processor of a user equipment (UE) from a base station of a network, one or more reference signals via a communication link between the UE and the base station;
constructing, by the processor, a channel state information (CSI) feedback by utilizing a correlation of channel responses in a frequency domain to reduce feedback overhead; and
transmitting, by the processor to the base station, the CSI feedback,wherein the constructing of the CSI feedback by utilizing the correlation of the channel responses in the frequency domain comprises determining a linear combination feedback comprising one or more linear combination coefficients as functions of frequency over a plurality of frequency bands,wherein the CSI feedback comprises the linear combination feedback, andwherein the determining of the linear combination feedback comprises interpolating the one or more linear combination coefficients between adjacent frequency bands of the plurality of frequency bands.
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Abstract
Techniques and examples of overhead reduction for linear combination codebook and feedback mechanism in mobile communications are described. A user equipment (UE) receives from a base station of a network one or more reference signals via a communication link between the UE and the base station. The UE constructs a channel state information (CSI) feedback by utilizing a correlation of channel responses in a frequency domain to reduce feedback overhead. The UE then transmits the CSI feedback to the base station.
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19 Claims
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1. A method, comprising:
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receiving, by a processor of a user equipment (UE) from a base station of a network, one or more reference signals via a communication link between the UE and the base station; constructing, by the processor, a channel state information (CSI) feedback by utilizing a correlation of channel responses in a frequency domain to reduce feedback overhead; and transmitting, by the processor to the base station, the CSI feedback, wherein the constructing of the CSI feedback by utilizing the correlation of the channel responses in the frequency domain comprises determining a linear combination feedback comprising one or more linear combination coefficients as functions of frequency over a plurality of frequency bands, wherein the CSI feedback comprises the linear combination feedback, and wherein the determining of the linear combination feedback comprises interpolating the one or more linear combination coefficients between adjacent frequency bands of the plurality of frequency bands. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method, comprising:
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transmitting, by a processor of a base station of a network to a user equipment (UE), one or more reference signals via a communication link between the UE and the base station; and receiving, by the processor from the UE, a channel state information (CSI) feedback which is constructed by utilizing a correlation of channel responses in a frequency domain, with the correlation involving a determination of a channel covariance matrix and a determination of an approximation of the channel covariance matrix with a unitary basis, wherein the CSI feedback comprises a linear combination feedback comprising one or more linear combination coefficients as functions of frequency over a plurality of frequency bands, wherein the CSI feedback comprises the linear combination feedback, and wherein the linear combination feedback indicates a difference of the one or more linear combination coefficients between adjacent frequency bands of the plurality of frequency bands. - View Dependent Claims (18, 19)
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Specification