Method for performing channel estimation in wireless communication system and apparatus therefor
First Claim
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1. A method for performing, by a UE, channel estimation in a wireless communication system, the method comprising:
- receiving, from an eNB, a control message including reference signal transmission pattern information representing a transmission pattern of a channel estimation reference signal (RS) transmitted through antenna ports;
receiving the reference signal from the eNB based on the received reference signal transmission pattern information;
measuring channel information per antenna port of the eNB based on the received reference signal;
accumulating the measured channel information;
acquiring autocorrelation in the time domain and/or the spatial domain based on the accumulated channel information;
calculating parameters related to 3D channel estimation;
receiving, from the eNB, channel estimation time information for a time when the 3D channel estimation will be performed and virtualization matrix information related to virtualization of a corresponding antenna port;
performing the 3D channel estimation based on the received channel estimation time information; and
feeding back channel state information related to the 3D channel estimation to the eNB,wherein the reference signal transmission pattern is a form that at least one or more reference signals are transmitted through antenna ports over at least one or more cycles and one cycle relates to one sub-frame,wherein the antenna ports are determined among total antenna ports of the eNB by the pattern and are different from antenna ports determined from a previous cycle,wherein the 3D channel estimation is performed for some antenna ports of the total antenna ports,wherein the some antenna ports are virtualized, the virtualization referring to receiving of the same reference signal through the some antenna ports, andwherein independent beam coefficients for antenna ports are applied to the virtualization matrix information.
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Abstract
A method for performing, by a UE, channel estimation in a wireless communication system includes: receiving, from an eNB, a control message including reference signal transmission pattern information representing a transmission pattern of a channel estimation reference signal (RS) transmitted through antenna ports; receiving the reference signal from the eNB on the basis of the received reference signal transmission pattern information; measuring a channel per antenna port of the eNB on the basis of the received reference signal; and feeding back channel state information related to the measured channel to the eNB.
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Citations
15 Claims
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1. A method for performing, by a UE, channel estimation in a wireless communication system, the method comprising:
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receiving, from an eNB, a control message including reference signal transmission pattern information representing a transmission pattern of a channel estimation reference signal (RS) transmitted through antenna ports; receiving the reference signal from the eNB based on the received reference signal transmission pattern information; measuring channel information per antenna port of the eNB based on the received reference signal; accumulating the measured channel information; acquiring autocorrelation in the time domain and/or the spatial domain based on the accumulated channel information; calculating parameters related to 3D channel estimation; receiving, from the eNB, channel estimation time information for a time when the 3D channel estimation will be performed and virtualization matrix information related to virtualization of a corresponding antenna port; performing the 3D channel estimation based on the received channel estimation time information; and feeding back channel state information related to the 3D channel estimation to the eNB, wherein the reference signal transmission pattern is a form that at least one or more reference signals are transmitted through antenna ports over at least one or more cycles and one cycle relates to one sub-frame, wherein the antenna ports are determined among total antenna ports of the eNB by the pattern and are different from antenna ports determined from a previous cycle, wherein the 3D channel estimation is performed for some antenna ports of the total antenna ports, wherein the some antenna ports are virtualized, the virtualization referring to receiving of the same reference signal through the some antenna ports, and wherein independent beam coefficients for antenna ports are applied to the virtualization matrix information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A UE for performing channel estimation in a wireless communication system, the UE comprising:
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an RF (Radio Frequency) unit configured to transmit and receive radio signals; and a processor functionally connected to the RF unit and controlling the UE, wherein the processor is configured to; receive, from an eNB, a control message including reference signal transmission pattern information representing a transmission pattern of a channel estimation reference signal (RS) transmitted through antenna ports; receive the reference signal from the eNB based on the received reference signal transmission pattern information; measure channel information per antenna port of the eNB based on the received reference signal; accumulate the measured channel information; acquire autocorrelation in the time domain and/or the spatial domain based on the accumulated channel information; calculate parameters related to 3D channel estimation; receive, from the eNB, channel estimation time information for a time when the 3D channel estimation will be performed and virtualization matrix information related to virtualization of a corresponding antenna port; perform the 3D channel estimation based on the received channel estimation time information; and feedback channel state information related to the 3D channel estimation to the eNB, wherein the reference signal transmission pattern is a form that at least one or more reference signals are transmitted through antenna ports over at least one or more cycles and one cycle relates to one sub-frame, wherein the antenna ports are determined among total antenna ports of the eNB by the pattern and are different from antenna ports determined from a previous cycle, wherein the 3D channel estimation is performed for some antenna ports of the total antenna ports, wherein the some antenna ports are virtualized, the virtualization referring to receiving of the same reference signal through the some antenna ports, and wherein independent beam coefficients for antenna ports are applied to the virtualization matrix information.
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Specification