Precoder codebook for CSI reporting in advanced wireless communication systems

1. A user equipment (UE) for a channel state information (CSI) feedback in an advanced communication system, the UE comprising:

a transceiver configured to receive, from a base station (BS), CSI feedback configuration information for a precoding matrix indicator (PMI) feedback using a higher layer signaling, wherein the CSI feedback configuration information includes a combination of an oversampling factor (O 1 , O 2 ) and a dual polarized CSI reference signal (CSI-RS) antenna port layout (N 1 , N 2 ), and wherein subscripts 1 and 2 stand for a first dimension and a second dimension, respectively, and a number of dual polarized CSI-RS ports P=2N 1 N 2 ; and

at least one processor configured to:

identify the combination of the (O 1 , O 2 ) and (N 1 , N 2 ) from a table including at least the combinations of the (O 1 , O 2 ) and (N 1 , N 2 ) as follows:

Number of CSI-RS

antenna ports (P)

(N 1 , N 2 )

(O 1 , O 2 )

20

(2, 5)

(8, 4)

(5, 2)

(4, 4)

(10, 1)

(4, —)

24

(2, 6)

(8, 4)

(3, 4)

(8, 4)

(4, 3)

(4, 4)

(6, 2)

(4, 4)

(12, 1)

(4, —)

28

(2, 7)

(8, 4)

(7, 2)

(4, 4)

(14, 1)

(4, —)

32

(2, 8)

(8, 4)

(4, 4)

(8, 4)

(8, 2)

(4, 4)

(16, 1)

 (4, —),

and

 determine the PMI using a Class A codebook based on the combination of the (O 1 , O 2 ) and (N 1 , N 2 ),

wherein the transceiver is further configured to transmit, to the BS, the CSI feedback over an uplink channel including the determined PMI.

2. The UE of claim 1 , wherein the Class A codebook corresponds to the Class A codebook in long-term-evolution (LTE) specification.

3. The UE of claim 1 , wherein the higher layer signaling comprises at least one of a codebook-Config-N1 parameter to configure N 1 , a codebook-Config-N2 parameter to configure N 2 , a codebook-Over-Sampling-RateConfig-O1 parameter to configure O 1 , a codebook-Over-Sampling-RateConfig-O2 parameter to configure O 2 , or a Codebook-Config parameter to configure a value from a set {1,2,3,4} that corresponds to four types of beam groups for the PMI feedback using the Class A codebook.

4. The UE of claim 1 , wherein the at least one processor is further configured to:

derive a first PMI corresponding to the Class A codebook index pair {i 1,1 ,i 1,2 }; and

derive a second PMI i 2 corresponding to the Class A codebook index i 2 ,

wherein the PMI comprises the first PMI i 1 and the second PMI i 2 .

5. The UE of claim 1 , wherein the at least one processor is further configured to determine a Class A codebook parameter that comprises at least one of a (N 1 , N 2 ) pair, one or multiple (O 1 , O 2 ) pairs, or a Codebook-Config parameter, wherein the Codebook-Config parameter belongs to a set {1, 2, 3, 4} that corresponds to four types of beam groups for the PMI feedback using the Class A codebook.

6. The UE of claim 1 , wherein the at least one processor is further configured to determine a Class A codebook parameter that comprises at least one of a (N 1 , N 2 ) pair, a (O 1 , O 2 ) pair, none or at least one (p 1 , p 2 ) pair, or a Codebook-Config parameter, wherein the Codebook-Config parameter belongs to a set {1, 2, 3, 4} that corresponds to four types of beam groups for the PMI feedback using the Class A codebook, and the at least one (p 1 , p 2 ) pair comprises beam spacing parameters in the first and second dimensions to construct beam groups according to a value of Codebook-Config parameter, and wherein at least one of p 1 and p 2 comprises at least one value from a set {1, 2, . . . , O 1 } and a set {1, 2, . . . , O 2 }, respectively.

7. A base station (BS) for a channel state information (CSI) feedback in an advanced communication system, the BS comprising:

a transceiver configured to:

transmit, to a user equipment (UE), CSI feedback configuration information for a precoding matrix indicator (PMI) feedback using a higher layer signaling, wherein the CSI feedback configuration information includes a combination of an oversampling factor (O 1 , O 2 ) and a dual polarized CSI reference signal (CSI-RS) antenna port layout (N 1 , N 2 ), wherein subscripts 1 and 2 stand for a first dimension and a second dimension, respectively, and a number of dual polarized CSI-RS ports P=2N 1 N 2 , and wherein the combination of the (O 1 , O 2 ) and (N 1 , N 2 ) is indicated based on a table including at least the combinations of the (O 1 , O 2 ) and (N 1 , N 2 ) as follows:

Number of CSI-RS

antenna ports (P)

(N 1 , N 2 )

(O 1 , O 2 )

20

(2, 5)

(8, 4)

(5, 2)

(4, 4)

(10, 1)

(4, —)

24

(2, 6)

(8, 4)

(3, 4)

(8, 4)

(4, 3)

(4, 4)

(6, 2)

(4, 4)

(12, 1)

(4, —)

28

(2, 7)

(8, 4)

(7, 2)

(4, 4)

(14, 1)

(4, —)

32

(2, 8)

(8, 4)

(4, 4)

(8, 4)

(8, 2)

(4, 4)

(16, 1)

 (4, —);

and

 receive, from the UE, the CSI feedback over an uplink channel including the PMI determined using a Class A codebook based on the configured combination of the (O 1 , O 2 ) and (N 1 , N 2 ).

8. The BS of claim 7 , wherein the Class A codebook corresponds to the Class A codebook in long-term-evolution (LTE) specification.

9. The BS of claim 7 , wherein the higher layer signaling comprises at least one of a codebook-Config-N1 parameter to configure N 1 , a codebook-Config-N2 parameter to configure N 2 , a codebook-Over-Sampling-RateConfig-O1 parameter to configure O 1 , a codebook-Over-Sampling-RateConfig-O2 parameter to configure O 2 , or a Codebook-Config parameter to configure a value from a set {1,2,3,4} that corresponds to four types of beam groups for the PMI feedback using the Class A codebook.

10. The BS of claim 7 , wherein a Class A codebook parameter comprises at least one of a (N 1 , N 2 ) pair, one or multiple (O 1 , O 2 ) pairs, or a Codebook-Config parameter, and wherein the Codebook-Config parameter belongs to a set {1, 2, 3, 4} that corresponds to four types of beam groups for the PMI feedback using the Class A codebook.

11. The BS of claim 7 , wherein a Class A codebook parameter comprises at least one of a (N 1 , N 2 ) pair, a (O 1 , O 2 ) pair, none or at least one (p 1 , p 2 ) pair, or a Codebook-Config parameter, wherein the Codebook-Config parameter belongs to a set {1, 2, 3, 4} that corresponds to four types of beam groups for the PMI feedback using the Class A codebook, and the at least one (p 1 , p 2 ) pair comprises beam spacing parameters in the first and second dimensions to construct beam groups according to a value of Codebook-Config parameter, and wherein at least one of p 1 and p 2 comprises at least one value from a set {1, 2, . . . , O 1 } and a set {1, 2, . . . , O 2 }, respectively.

12. A method for a channel state information (CSI) feedback in an advanced communication system, the method comprising:

receiving, from a base station (BS), CSI feedback configuration information for a precoding matrix indicator (PMI) feedback using a higher layer signaling, wherein the CSI feedback configuration information includes a combination of an oversampling factor (O 1 , O 2 ) and a dual polarized CSI reference signal (CSI-RS) antenna port layout (N 1 , N 2 ), and wherein subscripts 1 and 2 stand for a first dimension and a second dimension, respectively, and a number of dual polarized CSI-RS ports P=2N 1 N 2 ;

identifying, by a user equipment (UE), the combination of the (O 1 , O 2 ) and (N 1 , N 2 ) from a table including at least the combinations of the (O 1 , O 2 ) and (N 1 , N 2 ) as follows:

Number of CSI-RS

antenna ports (P)

(N 1 , N 2 )

(O 1 , O 2 )

20

(2, 5)

(8, 4)

(5, 2)

(4, 4)

(10, 1)

(4, —)

24

(2, 6)

(8, 4)

(3, 4)

(8, 4)

(4, 3)

(4, 4)

(6, 2)

(4, 4)

(12, 1)

(4, —)

28

(2, 7)

(8, 4)

(7, 2)

(4, 4)

(14, 1)

(4, —)

32

(2, 8)

(8, 4)

(4, 4)

(8, 4)

(8, 2)

(4, 4)

(16, 1)

 (4, —);

determining, the UE, the PMI using a Class A codebook based on the combination of the (O 1 , O 2 ) and (N 1 , N 2 ); and

transmitting, to the BS, the CSI feedback over an uplink channel including the determined PMI.

13. The method of claim 12 , wherein the Class A codebook corresponds to the Class A codebook in long-term-evolution (LTE) specification.

14. The method of claim 12 , wherein the higher layer signaling comprises at least one of a codebook-Config-N1 parameter to configure N 1 , a codebook-Config-N2 parameter to configure N 2 , a codebook-Over-Sampling-RateConfig-O1 parameter to configure O 1 , a codebook-Over-Sampling-RateConfig-O2 parameter to configure O 2 , or a Codebook-Config parameter to configure a value from a set {1,2,3,4} that corresponds to four types of beam groups for the PMI feedback using the Class A codebook.

15. The method of claim 12 , further comprising:

deriving a first PMI i 1 corresponding to the Class A codebook index pair {i 1,1 ,i 1,2 }; and

deriving a second PMI i 2 corresponding to the Class A codebook index i 2 ,

wherein the PMI comprises the first PMI i 1 and the second PMI i 2 .

16. The method of claim 12 , further comprising determining a Class A codebook parameter that comprises at least one of a (N 1 , N 2 ) pair, one or multiple (O 1 , O 2 ) pairs, or a Codebook-Config parameter, wherein the Codebook-Config parameter belongs to a set {1, 2, 3, 4} that corresponds to four types of beam groups for the PMI feedback using the Class A codebook.

17. The method of claim 12 , further comprising determining a Class A codebook parameter that comprises at least one of a (N 1 , N 2 ) pair, a (O 1 , O 2 ) pair, none or at least one (p 1 , p 2 ) pair, or a Codebook-Config parameter, wherein the Codebook-Config parameter belongs to a set {1, 2, 3, 4} that corresponds to four types of beam groups for the PMI feedback using the Class A codebook, and the at least one (p 1 , p 2 ) pair comprises beam spacing parameters in the first and second dimensions to construct beam groups according to a value of Codebook-Config parameter, and wherein at least one of p 1 and p 2 comprises at least one value from a set {1, 2, . . . , O 1 } and a set {1, 2, . . . , O 2 }, respectively.