Transmission modes and signaling for uplink MIMO support or single TB dual-layer transmission in LTE uplink
AssigneeTexas Instruments Incorporated
InventorsEko N. Onggosanusi, Runhua Chen
Life of this patent
Estimating the term…
Abstract
An apparatus for mapping data in a wireless communication system. The apparatus includes circuitry for generating a precoding matrix for multi-antenna transmission based on a precoding matrix indicator (PMI) feedback from at least one remote receiver where the PMI indicates a choice of precoding matrix derived from a matrix multiplication of two matrices from a first code book and a second codebook. The apparatus further includes circuitry for precoding one or more layers of a data stream with the precoding matrix and transmitting the precoded layers of data stream to the remote receiver.
Claims6
A method comprising:
- determining a first precoding matrix indicator (PMI) value and a second PMI value, the first and second PMI values being indicative of a precoding matrix W derived from a matrix multiplication of a W1 matrix and a W2 matrix, the W1 matrix corresponding to a matrix from a first codebook C1, the W2 matrix corresponding to a matrix from a second codebook C2, the first PMI value corresponding to the W1 matrix and the second PMI value corresponding to the W2 matrix,
- wherein the first codebook C1 includes the following matrices:
- B
- =
- [
- b
- 0
- b
- 1
- …
- b
- 1
-
- 5
- ]
- ,
- [
- B
- ]
- 1
- +
- m
- ,
- 1
- +
- n
- =
- e
- j
-
- 2
-
- π
-
- n
-
- n
- 1
-
- 6
- ,
- m
- =
- 0
- ,
- 1
- ,
- 2
- ,
- 3
-
- n
- =
- 0
- ,
- 1
- ,
- …
- ,
- 15
- X
- (
- k
- )
- ∈
- {
- [
- b
- (
- 2
-
- k
- )
-
- mod
-
- 16
- b
- (
- 2
-
- k
- +
- 1
- )
-
- m
-
- o
-
- d
-
- 1
-
- 6
- b
- (
- 2
-
- k
- +
- 2
- )
-
- m
-
- o
-
- d
-
- 1
-
- 6
- b
- (
- 2
-
- k
- +
- 3
- )
-
- m
-
- o
-
- d
-
- 1
-
- 6
- ]
- :
- k
- =
- 0
- ,
- 1
- ,
- …
- ,
- 7
- }
- .
- W
- 1
- (
- k
- )
- =
- [
- X
- (
- k
- )
- 0
- 0
- X
- (
- k
- )
- ]
- ,
- C
- 1
- =
- {
- W
- 1
- (
- 0
- )
- ,
- W
- 1
- (
- 1
- )
- ,
- W
- 1
- (
- 2
- )
- ,
- …
- ,
- W
- 1
- (
- 7
- )
- }
- and
- transmitting the first and second PMI values.
A user equipment (UE) comprising:
- a processor configured to determine a first precoding matrix indicator (PMI) value and a second PMI value, the first and second PMI values being indicative of a precoding matrix W derived from a matrix multiplication of a W1 matrix and a W2 matrix, the W1 matrix corresponding to a matrix from a first codebook C1, the W2 matrix corresponding to a matrix from a second codebook C2, the first PMI value corresponding to the W1 matrix and the second PMI value corresponding to the W2 matrix,
- wherein the first codebook C1 includes the following matrices:
- B
- =
- [
- b
- 0
- b
- 1
- …
- b
- 1
-
- 5
- ]
- ,
- [
- B
- ]
- 1
- +
- m
- ,
- 1
- +
- n
- =
- e
- j
-
- 2
-
- π
-
- n
-
- n
- 1
-
- 6
- ,
- m
- =
- 0
- ,
- 1
- ,
- 2
- ,
- 3
-
- n
- =
- 0
- ,
- 1
- ,
- …
- ,
- 15
- X
- (
- k
- )
- ∈
- {
- [
- b
- (
- 2
-
- k
- )
-
- mod
-
- 16
- b
- (
- 2
-
- k
- +
- 1
- )
-
- m
-
- o
-
- d
-
- 1
-
- 6
- b
- (
- 2
-
- k
- +
- 2
- )
-
- m
-
- o
-
- d
-
- 1
-
- 6
- b
- (
- 2
-
- k
- +
- 3
- )
-
- m
-
- o
-
- d
-
- 1
-
- 6
- ]
- :
- k
- =
- 0
- ,
- 1
- ,
- …
- ,
- 7
- }
- .
- W
- 1
- (
- k
- )
- =
- [
- X
- (
- k
- )
- 0
- 0
- X
- (
- k
- )
- ]
- ,
- C
- 1
- =
- {
- W
- 1
- (
- 0
- )
- ,
- W
- 1
- (
- 1
- )
- ,
- W
- 1
- (
- 2
- )
- ,
- …
- ,
- W
- 1
- (
- 7
- )
- }
- and
- a transceiver configured to transmit the first and second PMI values.
Dependencies are inferred from the claim text.