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US 11,539,406 B2Granted
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
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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.
Claims20
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 second codebook C2 includes the following matrices:
- {
- 1
- 2
- [
- Y
- Y
- ]
- ,
- 1
- 2
- [
- Y
- jY
- ]
- ,
- 1
- 2
- [
- Y
- -
- Y
- ]
- ,
- 1
- 2
- [
- Y
- -
- jY
- ]
- }
- ,
- where:
- Y
- ∈
- {
- [
- 1
- 0
- 0
- 0
- ]
- ,
- [
- 0
- 1
- 0
- 0
- ]
- ,
- [
- 0
- 0
- 1
- 0
- ]
- ,
- [
- 0
- 0
- 0
- 1
- ]
- }
- ;
- transmitting the first PMI value at a first periodicity;
- transmitting the second PMI value at a second periodicity different than the first periodicity;
- and
- transmitting a rank indicator (RI) value at the first periodicity.
68 more elements
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, the precoding matrix W being equal to 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 second codebook C2 includes the following matrices:
- {
- 1
- 2
- [
- Y
- Y
- ]
- ,
- 1
- 2
- [
- Y
- jY
- ]
- ,
- 1
- 2
- [
- Y
- -
- Y
- ]
- ,
- 1
- 2
- [
- Y
- -
- jY
- ]
- }
- ,
- where:
- Y
- ∈
- {
- [
- 1
- 0
- 0
- 0
- ]
- ,
- [
- 0
- 1
- 0
- 0
- ]
- ,
- [
- 0
- 0
- 1
- 0
- ]
- ,
- [
- 0
- 0
- 0
- 1
- ]
- }
- ;
- transmitting the first PMI value at a first periodicity;
- transmitting the second PMI value at a second periodicity different than the first periodicity;
- and
- transmitting a rank indicator (RI) value at the first periodicity.
68 more elements
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 second codebook C2 includes the following matrices:
- {
- 1
- 2
- [
- Y
- Y
- ]
- ,
- 1
- 2
- [
- Y
- jY
- ]
- ,
- 1
- 2
- [
- Y
- -
- Y
- ]
- ,
- 1
- 2
- [
- Y
- -
- jY
- ]
- }
- ,
- where:
- Y
- ∈
- {
- [
- 1
- 0
- 0
- 0
- ]
- ,
- [
- 0
- 1
- 0
- 0
- ]
- ,
- [
- 0
- 0
- 1
- 0
- ]
- ,
- [
- 0
- 0
- 0
- 1
- ]
- }
- ;
- and
- a transceiver configured to transmit the first PMI value at a first periodicity, transmit the second PMI value at a second periodicity different than the first periodicity, and to transmit a rank indicator (RI) value at the first periodicity.
66 more elements
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, the precoding matrix W being equal to 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 second codebook C2 includes the following matrices:
- {
- 1
- 2
- [
- Y
- Y
- ]
- ,
- 1
- 2
- [
- Y
- jY
- ]
- ,
- 1
- 2
- [
- Y
- -
- Y
- ]
- ,
- 1
- 2
- [
- Y
- -
- jY
- ]
- }
- ,
- where:
- Y
- ∈
- {
- [
- 1
- 0
- 0
- 0
- ]
- ,
- [
- 0
- 1
- 0
- 0
- ]
- ,
- [
- 0
- 0
- 1
- 0
- ]
- ,
- [
- 0
- 0
- 0
- 1
- ]
- }
- ;
- and
- a transceiver configured to transmit the first PMI value at a first periodicity, transmit the second PMI value at a second periodicity different than the first periodicity, and to transmit a rank indicator (RI) value at the first periodicity.
66 more elements
Dependencies are inferred from the claim text.