Method of transmitting and receiving channel state information feedback in a wireless communication system
AssigneeLG Electronics Inc.
InventorsXu Jian, Ja Ho Koo, Bin Chul Ihm, Moon Il Lee, Wook Bong Lee, Hyun Soo Ko
Life of this patent
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Abstract
A method of transmitting and receiving channel state information feedback in a wireless communication system is disclosed. A method of transmitting channel state information (CSI) feedback by a user equipment receiver in a wireless communication system comprises mapping components of a CSI matrix to constellations; and allocating the mapped components to resource.
Claims12
A method of transmitting channel state information (CSI) feedback by a receiver to a transmitter in a wireless communication system, the method comprising:
- mapping upper triangle components rx,y(i,k) of a channel covariance matrix R(i,k), where x≦y, to constellation points;
- allocating the mapped upper triangle components to a resource;
- and
- transmitting the mapped upper triangle components as the CSI feedback using the allocated resource,
- wherein
- R
-
- (
- i
- ,
- k
- )
- =
- [
- r
- 1
- ,
- 1
-
- (
- i
- ,
- k
- )
- r
- 1
- ,
- 2
-
- (
- i
- ,
- k
- )
- …
- r
- 1
- ,
- N
-
- (
- i
- ,
- k
- )
- r
- 2
- ,
- 1
-
- (
- i
- ,
- k
- )
- r
- 2
- ,
- 2
-
- (
- i
- ,
- k
- )
- …
- r
- 2
- ,
- N
-
- (
- i
- ,
- k
- )
- ⋮
- ⋮
- ⋱
- ⋮
- r
- N
- ,
- 1
-
- (
- i
- ,
- k
- )
- r
- N
- ,
- 2
-
- (
- i
- ,
- k
- )
- …
- r
- N
- ,
- N
-
- (
- i
- ,
- k
- )
- ]
- ,
- where N is a number of antennas at the transmitter, i is a symbol index, and k is a subcarrier index.
A method of receiving channel state information (CSI) feedback by a transmitter in a wireless communication system, the method comprising:
- transmitting a signal to a receiver;
- and
- receiving the CSI feedback indicating a channel covariance matrix R(i,k) from the receiver,
- wherein
- R
-
- (
- i
- ,
- k
- )
- =
- [
- r
- 1
- ,
- 1
-
- (
- i
- ,
- k
- )
- r
- 1
- ,
- 2
-
- (
- i
- ,
- k
- )
- …
- r
- 1
- ,
- N
-
- (
- i
- ,
- k
- )
- r
- 2
- ,
- 1
-
- (
- i
- ,
- k
- )
- r
- 2
- ,
- 2
-
- (
- i
- ,
- k
- )
- …
- r
- 2
- ,
- N
-
- (
- i
- ,
- k
- )
- ⋮
- ⋮
- ⋱
- ⋮
- r
- N
- ,
- 1
-
- (
- i
- ,
- k
- )
- r
- N
- ,
- 2
-
- (
- i
- ,
- k
- )
- …
- r
- N
- ,
- N
-
- (
- i
- ,
- k
- )
- ]
- ,
- where N is a number of antennas at the transmitter, i is a symbol index, and k is a subcarrier index, and
- wherein the receiving the channel covariance matrix R(i,k) comprises receiving upper triangle components rx,y(i,k) of R(i,k), where x≦y, which are mapped on constellation points.
Dependencies are inferred from the claim text.