IP Library › Granted Patent US 8,494,088

Granted Patent B2

US 8,494,088 · App. 12/768,061 · Granted Jul 23, 2013

Transmitting/receiving apparatus and method thereof in codebook based multiple antenna system

Inventors: David Mazzarese (Suwon-si, KR); Bruno Clerckx (Seoul, KR); Sang-Woo Lee (Seoul, KR)

Assignee: Samsung Electronics Co., Ltd.

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Quick Facts

Patent No.: US 8,494,088
App. No.: 12/768,061
Granted: Jul 23, 2013
Kind: B2

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USPTO Patent Center↗ Full Patent PDF↗

Abstract

A transmission/reception apparatus and a method thereof in a codebook-based multiple antenna system is provided. In a transmission method in a codebook-based Multiple Input Multiple Output (MIMO) system, feedback information is received from a receiver. A downlink Open-Loop Single User MIMO (OL SU-MIMO) codebook subset is determined within a base cookbook based on the feedback information. At least one data stream is transmitted via at least one antenna using the determined downlink OL SU-MIMO codebook subset.

Claims (1677)

1. A transmission method in a codebook-based Multiple Input Multiple Output (MIMO) system, the method comprising:

receiving feedback information from a receiver;

determining a downlink Open-Loop Single User MIMO (OL SU-MIMO) codebook subset within a base codebook, based on the feedback information; and

transmitting at least one data stream via at least one antenna using the determined the downlink OL SU-MIMO codebook subset,

wherein the downlink OL SU-MIMO codebook subset comprises at least one codeword, a number of codewords determined based on a rank, and a number of transmission antennas.

2. The method of claim 1 , wherein the feedback information comprises at least one of a rank, a Channel Quality Indicator (CQI), and a subband index.

3. The method of claim 1 , wherein the at least one antenna consists of eight antennas and the downlink OL SU-MIMO codebook comprises a relation between a rank and a codebook subset size N w , corresponding to the rank in the following table:

rank

N w

4. The method of claim 3 , wherein when the eight transmission antennas are used, the OL-MIMO codebook comprises the following table:

C DLOLSU (8, 1, 8, n)

C DLOLSU (8, 2, 4, n)

C DLOLSU (8, 3, 4, n)

C DLOLSU (8, 4, 2, n)

C (8, 1, 4, m) in

C (8, 2, 4, m) in

C (8, 3, 4, m) in

C (8, 4, 4, m) in

base

codebook

C (8, 1, 4, 0)

C (8, 2, 4, 0)

C (8, 3, 4, 0)

C (8, 4, 4, 0)

C (8, 1, 4, 3)

C (8, 2, 4, 1)

C (8, 3, 4, 1)

C (8, 4, 4, 1)

C (8, 1, 4, 5)

C (8, 2, 4, 2)

C (8, 3, 4, 2)

C (8, 1, 4, 7)

C (8, 2, 4, 3)

C (8, 3, 4, 5)

C (8, 1, 4, 9)

C (8, 1, 4, 11)

C (8, 1, 4, 13)

C (8, 1, 4, 15)

C DLOLSU (8, 5, 2, n)

C DLOLSU (8, 6, 2, n)

C DLOLSU (8, 7, 2, n)

C DLOLSU (8, 8, 1, n)

C (8, 5, 4, m) in

C (8, 6, 4, m) in

C (8, 7, 4, m) in

C (8, 8, 4, m) in

base

codebook

C (8, 5, 4, 0)

C (8, 6, 4, 0)

C (8, 7, 4, 0)

C (8, 8, 4, 0)

C(8, 5, 4, 1)

C (8, 6, 4, 1)

C (8, 7, 4, 1)

where C DLOLSU (N t ,M t ,N w ) is a DownLink (DL) OL Single User-MIMO (SU-MIMO) index, N t is the number of transmission antennas, M t is the number of streams, N w is a codebook subset size of a given rank, and C DLOLSU (N t ,M t ,N w ,i) is an i-th codebook entry of C DLOLSU (N t ,M t ,N w ).

5. The method of claim 1 , wherein the at least one antenna consists of four antennas and the downlink OL SU-MIMO codebook comprises a relation between a rank and a codebook subset size N w corresponding to the rank in the following table:

rank

N w

6. The method of claim 5 , wherein when the four transmission antennas are used, the downlink OL SU-MIMO codebook comprises the following table:

C DLOLSU (4, 1, 4, n)

C DLOLSU (4, 2, 4, n)

C DLOLSU (4, 3, 2, n)

C DLOLSU (4, 4, 1, n)

C (4, 1, 6, m) in

C (4, 2, 6, m) in

C (4, 3, 6, m) in

C (4, 4, 6, m) in

base

codebook

C (4, 1, 6, 8)

C (4, 2, 6, 23)

C (4, 3, 6, 12)

C (4, 4, 6, 4)

C (4, 1, 6, 10)

C (4, 2, 6, 29)

C (4, 3, 6, 13)

C (4, 1, 6, 9)

C (4, 2, 6, 27)

C (4, 1, 6, 11)

C (4, 2, 6, 25)

7. The method of claim 1 , wherein the at least one antenna consists of two antennas and the downlink OL SU-MIMO codebook comprises a relation between a rank and a codebook subset size N w corresponding to the rank in the following table:

rank

N w

8. The method of claim 7 , wherein when the two transmission antennas are used, the downlink OL SU-MIMO codebook comprises the following table:

C DLOLSU (2,1,2,n)

C DLOLSU (2,2,1,n)

C(2,1,3,m) in base

C(2,2,3,m) in base

codebook

C(2,1,3,2)

C(2,2,3,2)

C(2,1,3,6)

9. The method of claim 7 , wherein when the two transmission antennas are used, the downlink OL SU-MIMO codebook comprises the following table:

C DLOLSU (2,1,2,n)

C DLOLSU (2,2,1,n)

C(2,1,3,m) in base

codebook

C(2,1,3,0)

C(2,2,3,0)

C(2,1,3,4)

10. The method of claim 1 , wherein the at least one antenna consists of two antennas and the downlink OL SU-MIMO codebook comprises a relation between a rank and a codebook subset size N w corresponding to the rank in following table:

rank

N w

11. The method of claim 10 , wherein when the two transmission antennas are used, the downlink OL SU-MIMO codebook comprises the following table:

C DLOLSU (2,1,4,n)

C DLOLSU (2,2,2,n)

C(2,1,4,m) in base

C(2,2,4,m) in base

codebook

C(2,1,4,0)

C(2,2,4,0)

C(2,1,4,2)

C(2,2,4,2)

C(2,1,4,4)

C(2,1,4,6)

12. The method of claim 1 , wherein the at least one antenna consists of four antennas and the downlink OL SU-MIMO codebook comprises a relation between a rank and a codebook subset size N w corresponding to the rank in the following table:

rank

N w

13. The method of claim 12 , wherein when the four transmission antennas are used, the downlink OL SU-MIMO codebook comprises the following table:

C DLOLSU

(4, 1, 4, n)

(4, 2, 2, n)

(4, 3, 2, n)

C DLOLSU (4, 4, 1, n)

C (4, 1, 6, m) in

C (4, 2, 6, m) in

C (4, 3, 6, m) in

C (4, 4, 6, m) in

base

codebook

C (4, 1, 6, 8)

C (4, 2, 6, 23)

C (4, 3, 6, 12)

C (4, 4, 6, 4)

C (4, 1, 6, 10)

C (4, 2, 6, 29)

C (4, 3, 6, 13)

C (4, 1, 6, 9)

C (4, 1, 6, 11)

14. The method of claim 1 , wherein the at least one antenna consists of four antennas and the downlink OL SU-MIMO codebook comprises a relation between a rank and a codebook subset size N w corresponding to the rank in the following table:

rank

N w

15. The method of claim 14 , wherein when the four transmission antennas are used, the downlink OL SU-MIMO codebook comprises the following table:

C ULOLSU

(4, 4, 1, n)

(4, 1, 4, n)

(4, 2, 4, n)

(4, 3, 2, n)

PMI m in

UL base

codebook

codebook of

rank 1

rank 2

rank 3

55.

16. The method of claim 1 , wherein the downlink OL SU-MIMO codebook has a nested property where a precoder of a lower rank comprises one of ordered and unordered columns of a precoder of a higher rank.

17. The method of claim 1 , further comprising generating the downlink OL SU-MIMO in the base codebook, wherein the generating of the downlink OL SU-MIMO codebook comprises:

determining a codebook subset size for each rank;

determining a codebook subset that maximizes a minimum chordal distance with respect to all codewords of a relevant rank in the base codebook;

determining a codebook subset that maximizes a minimum product distance with respect to all the codewords of a corresponding rank in the base codebook; and

determining a codebook subset such that the corresponding rank is contained in a different rank in the codebook subset that meets the minimum chordal distance and the minimum product distance.

18. The method of claim 17 , wherein the minimum chordal distance is determined using the following equation:

OLcodebook_candidates

arg

⁢

max

⁢

min

≤

⁢



⁢



19. The method of claim 17 , wherein the minimum product distance is determined using the following equation:

OLcodebook

arg

⁢

max

OLcodebook_candidates

⁢

min

⁢

∏

⁢



⁢

⁡

(

)



⁡

(

)

[

ⅇ

j2π

⁢

cos

⁡

(

)

…

ⅇ

j2π

⁡

(

)

⁢

cos

⁡

(

)

]

20. A reception method in a codebook-based Multiple Input Multiple Output (MIMO) system, the method comprising:

transmitting feedback information to a transmitter; and

wherein the feedback information is used for determining a downlink Open-Loop Single User MIMO (OL SU-MIMO) codebook subset within a base codebook,

receiving at least one data stream from the transmitter via at least one antenna using the determined downlink OL SU-MIMO codebook subset,

wherein the downlink OL SU-MIMO codebook subset comprises at least one codeword, a number of codewords determined based on a rank, and a number of transmission antennas.

21. The method of claim 20 , wherein the feedback information comprises at least one of a rank, a Channel Quality Indicator (CQI), and a subband index.

22. The method of claim 20 , wherein the at least one antenna consists of eight antennas and the downlink OL SU-MIMO codebook comprises a relation between a rank and a codebook subset size N w corresponding to the rank in the following table:

rank

N w

23. The method of claim 22 , wherein when the eight transmission antennas are used, the downlink OL SU-MIMO codebook comprises the following table:

C DLOLSU (8,1,8,n)

C DLOLSU (8,2,4,n)

C DLOLSU (8,3,4,n)

C DLOLSU (8,4,2,n)

C(8,1,4,m) in

C(8,2,4,m) in

C(8,3,4,m) in

C(8,4,4,m) in

base

codebook

C(8,1,4,0)

C(8,2,4,0)

C(8,3,4,0)

C(8,4,4,0)

C(8,1,4,3)

C(8,2,4,1)

C(8,3,4,1)

C(8,4,4,1)

C(8,1,4,5)

C(8,2,4,2)

C(8,3,4,2)

C(8,1,4,7)

C(8,2,4,3)

C(8,3,4,5)

C(8,1,4,9)

C(8,1,4,11)

C(8,1,4,13)

C(8,1,4,15)

C DLOLSU (8,5,2,n)

C DLOLSU (8,6,2,n)

C DLOLSU (8,7,2,n)

C DLOLSU (8,8,1,n)

C(8,5,4,m) in

C(8,6,4,m) in

C(8,7,4,m) in

C(8,8,4,m) in

base

codebook

C(8,5,4,0)

C(8,6,4,0)

C(8,7,4,0)

C(8,8,4,0)

C(8,5,4,1)

C(8,6,4,1)

C(8,7,4,1)

24. The method of claim 20 , wherein the at least one antenna consists of four antennas and the downlink OL SU-MIMO codebook comprises a relation between a rank and a codebook subset size N w corresponding to the rank in the following table:

rank

N w

25. The method of claim 24 , wherein when the four transmission antennas are used, the downlink OL SU-MIMO codebook comprises the following table:

C DLOLSU (4,1,4,n)

C DLOLSU (4,2,4,n)

C DLOLSU (4,3,2,n)

C DLOLSU (4,4,1,n)

C(4,1,6,m) in

C(4,2,6,m) in

C(4,3,6,m) in

C(4,4,6,m) in

base

codebook

C(4,1,6,8)

C(4,2,6,23)

C(4,3,6,12)

C(4,4,6,4)

C(4,1,6,10)

C(4,2,6,29)

C(4,3,6,13)

C(4,1,6,9)

C(4,2,6,27)

C (4,1,6,11)

C(4,2,6,25)

26. The method of claim 20 , wherein the at least one antenna consists of two antennas and the downlink OL SU-MIMO codebook comprises a relation between a rank and a codebook subset size N w corresponding to the rank in the following table:

rank

N w

27. The method of claim 26 , wherein when the two transmission antennas are used, the downlink OL SU-MIMO codebook comprises the following table:

C DLOLSU (2,1,2,n)

C DLOLSU (2,2,1,n)

C(2,1,3,m) in

C(2,2,3,m) in base

base codebook

codebook

C(2,1,3,2)

C(2,2,3,2)

C(2,1,3,6)

28. The method of claim 26 , wherein when the two transmission antennas are used, the downlink OL SU-MIMO codebook comprises the following table below:

C DLOLSU (2,1,2,n)

C DLOLSU (2,2,1,n)

C(2,1,3,m) in base

codebook

C(2,1,3,0)

C(2,2,3,0)

C(2,1,3,4)

29. The method of claim 20 , wherein the at least one antenna consists of two antennas and the downlink OL SU-MIMO codebook comprises a relation between a rank and a codebook subset size N w corresponding to the rank in the following table:

rank

N w

30. The method of claim 29 , wherein when the two transmission antennas are used, the downlink OL SU-MIMO codebook comprises the following table:

C DLOLSU (2,1,4,n)

C DLOLSU (2,2,4,n)

C(2,1,4,m) in base

C(2,2,4,m) in base

codebook

C(2,1,4,0)

C(2,2,4,0)

C(2,1,4,2)

C(2,2,4,2)

C(2,1,4,4)

C(2,1,4,6)

31. The method of claim 20 , wherein the at least one antenna consists of four antennas and the downlink OL SU-MIMO codebook comprises a relation between a rank and a codebook subset size N w corresponding to the rank in the following table:

rank

N w

32. The method of claim 31 , wherein when the four transmission antennas are used, the downlink OL SU-MIMO codebook comprises the following table:

C DLOLSU (4,1,4,n)

C DLOLSU (4,2,2,n)

C DLOLSU (4,3,2,n)

C DLOLSU (4,4,1,n)

C(4,1,6,m) in

C(4,2,6,m) in

C(4,3,6,m) in

C(4,4,6,m) in

base

codebook

C(4,1,6,8)

C(4,2,6,23)

C(4,3,6,12)

C(4,4,6,4)

C(4,1,6,10)

C(4,2,6,29)

C(4,3,6,13)

C(4,1,6,9)

C(4,1,6,11)

33. The method of claim 20 , wherein the at least one antenna consists of four antennas and the downlink OL SU-MIMO codebook comprises a relation between a rank and a codebook subset size N w corresponding to the rank in the following table:

rank

N w

34. The method of claim 33 , wherein when the four transmission antennas are used, the downlink OL SU-MIMO codebook comprises the following table:

C ULOLSU (4,1,4,n)

C ULOLSU (4,2,4,n)

C ULOLSU (4,3,2,n)

C ULOLSU (4,4,1,n)

PMI m in

PMI m in UL

UL base

base

codebook

of rank 1

of rank 2

of rank 3

55.

35. The method of claim 20 , wherein the downlink OL SU-MIMO codebook has a nested property where a precoder of a lower rank comprises one of ordered and unordered columns of a precoder of a higher rank.

36. A transmitting apparatus in a codebook-based Multiple Input Multiple Output (MIMO) system, the apparatus comprising:

a feedback receiver for receiving feedback information from a receiver;

a codebook subset determining unit for determining a downlink Open-Loop Single User MIMO (OL SU-MIMO) codebook subset within in a base codebook based on the feedback information; and

a precoding unit for transmitting at least one data stream via at least one antenna using the determined downlink OL SU-MIMO codebook subset,

wherein the downlink OL SU-MIMO codebook subset comprises at least one codeword, a number of codewords determined based on a rank, and a number of transmission antennas.

37. The apparatus of claim 36 , wherein the feedback information comprises at least one of a rank, a Channel Quality Indicator (CQI), and a subband index.

38. The apparatus of claim 36 , wherein the at least one antenna consists of eight antennas and the downlink OL SU-MIMO codebook comprises a relation between a rank and a codebook subset size N w corresponding to the rank in the following table:

rank

N w

39. The apparatus of claim 38 , wherein when the eight transmission antennas are used, the downlink OL SU-MIMO codebook comprises the following table:

C DLOLSU (8,1,8,n)

C DLOLSU (8,2,4,n)

C DLOLSU (8,3,4,n)

C DLOLSU (8,4,2,n)

C(8,1,4,m) in

C(8,2,4,m) in

C(8,3,4,m) in

C(8,4,4,m) in

base

codebook

C(8,1,4,0)

C(8,2,4,0)

C(8,3,4,0)

C(8,4,4,0)

C(8,1,4,3)

C(8,2,4,1)

C(8,3,4,1)

C(8,4,4,1)

C(8,1,4,5)

C(8,2,4,2)

C(8,3,4,2)

C(8,1,4,7)

C(8,2,4,3)

C(8,3,4,5)

C(8,1,4,9)

C(8,1,4,11)

C(8,1,4,13)

C(8,1,4,15)

C DLOLSU (8,5,2,n)

C DLOLSU (8,6,2,n)

C DLOLSU (8,7,2,n)

C DLOLSU (8,8,1,n)

C(8,5,4,m) in

C(8,6,4,m) in

C(8,7,4,m) in

C(8,8,4,m) in

base

codebook

C(8,5,4,0)

C(8,6,4,0)

C(8,7,4,0)

C(8,8,4,0)

C(8,5,4,1)

C(8,6,4,1)

C(8,7,4,1)

40. The apparatus of claim 36 , wherein the at least one antenna consists of four antennas and the downlink OL SU-MIMO codebook comprises a relation between a rank and a codebook subset size N w corresponding to the rank as in the following table:

rank

N w

41. The apparatus of claim 40 , wherein when the four transmission antennas are used, the downlink OL SU-MIMO codebook comprises the following table:

C DLOLSU (4,1,4,n)

C DLOLSU (4,2,4,n)

C DLOLSU (4,3,2,n)

C DLOLSU (4,4,1,n)

C(4,1,6,m) in

C(4,2,6,m) in

C(4,3,6,m) in

C(4,4,6,m) in

base

codebook

C(4,1,6,8)

C(4,2,6,23)

C(4,3,6,12)

C(4,4,6,4)

C(4,1,6,10)

C(4,2,6,29)

C(4,3,6,13)

C(4,1,6,9)

C(4,2,6,27)

C(4,1,6,11)

C(4,2,6,25)

42. The apparatus of claim 36 , wherein the at least one antenna consists of four antennas and the downlink OL SU-MIMO codebook comprises a relation between a rank and a codebook subset size N w corresponding to the rank as in the following table:

rank

N w

43. The apparatus of claim 42 , wherein when the two transmission antennas are used, the downlink OL SU-MIMO codebook comprises the following table:

C DLOLSU (2,1,2,n)

C DLOLSU (2,2,1,n)

C(2,2,3,m) in

C(2,2,3,m) in base

base codebook

codebook

C(2,1,3,2)

C(2,2,3,2)

C(2,1,3,6)

44. The apparatus of claim 42 , wherein when the two transmission antennas are used, the downlink OL SU-MIMO codebook comprises the following table:

C DLOLSU (2,1,2,n)

C DLOLSU (2,2,1,n)

C(2,1,3,m) in base

C(2,2,3,m) in base

codebook

C(2,1,3,0)

C(2,2,3,0)

C(2,1,3,4)

45. The apparatus of claim 36 , wherein the at least one antenna consists of four antennas and the downlink OL SU-MIMO codebook comprises a relation between a rank and a codebook subset size N w corresponding to the rank as in the following table:

rank

N w

46. The apparatus of claim 45 , wherein when the two transmission antennas are used, the downlink OL SU-MIMO codebook comprises the following table:

C DLOLSU (2,1,4,n)

C DLOLSU (2,2,4,n)

C(2,1,4,m) in base

C(2,2,4,m) in

codebook

base codebook

C(2,1,4,0)

C(2,2,4,0)

C(2,1,4,2)

C(2,2,4,2)

C(2,1,4,4)

C(2,1,4,6)

47. The apparatus of claim 36 , wherein the at least one antenna consists of four antennas and the downlink OL SU-MIMO codebook comprises a relation between a rank and a codebook subset size N w corresponding to the rank in the following table:

rank

N w

48. The apparatus of claim 47 , wherein when the four transmission antennas are used, the OL-MIMO codebook comprises the following table:

C DLOLSU (4,1,4,n)

C DLOLSU (4,2,2,n)

C DLOLSU (4,3,2,n)

C DLOLSU (4,4,1,n)

C(4,1,6,m) in

C(4,2,6,m) in

C(4,3,6,m) in

C(4,4,6,m) in

base

codebook

C(4,1,6,8)

C(4,2,6,23)

C(4,3,6,12)

C(4,4,6,4)

C(4,1,6,10)

C(4,2,6,29)

C(4,3,6,13)

C(4,1,6,9)

C(4,1,6,11)

49. The apparatus of claim 36 , wherein the at least one antenna consists of four antennas and the downlink OL SU-MIMO codebook comprises a relation between a rank and a codebook subset size N w corresponding to the rank in the following table:

rank

N w

50. The apparatus of claim 49 , wherein when the four transmission antennas are used, the downlink OL SU-MIMO codebook comprises the following table:

C ULOLSU (4,1,4,n)

C ULOLSU (4,2,4,n)

C ULOLSU (4,3,2,n)

C ULOLSU (4,4,1,n)

PMI m in

UL base

codebook of

codebook

codebook of

rank 1

of rank 2

of rank 3

rank 3

55.

51. The apparatus of claim 36 , wherein the downlink OL SU-MIMO codebook has a nested property where a precoder of a lower rank comprises one of ordered and unordered columns of a precoder of a higher rank.

52. The apparatus of claim 36 , wherein the codebook subset determining unit determines a codebook subset size for each rank;

determines a codebook subset that maximizes a minimum chordal distance with respect to all codewords of a relevant rank in the base codebook;

determines a codebook subset that maximizes a minimum product distance with respect to all the codewords of a corresponding rank in the base codebook; and

determines a codebook subset such that the corresponding rank is contained in a different rank in the codebook subset that meets the minimum chordal distance and the minimum product distance.

53. The apparatus of claim 52 , wherein the minimum chordal distance is determined using the following equation:

OLcodebook_candidates

arg

⁢

max

⁢

min

≤

⁢



⁢



54. The apparatus of claim 52 , wherein the minimum product distance is determined using the following equation:

OLcodebook

arg

⁢

max

OLcodebook_candidates

⁢

min

⁢

∏

⁢



⁢

⁡

(

)



⁡

(

)

[

ⅇ

j2π

⁢

cos

⁡

(

)

…

ⅇ

j2π

⁡

(

)

⁢

cos

⁡

(

)

]

55. A receiving apparatus in a codebook-based Multiple Input Multiple Output (MIMO) system, the apparatus comprising:

a feedback transmitter for transmitting feedback information to a transmitter; and

wherein the feedback information is used for determining a downlink Open-Loop Single User MIMO (OL SU-MIMO) codebook subset within a base codebook,

an MIMO detector for receiving at least one data stream from the transmitter via at least one antenna using the determined downlink OL SU-MIMO codebook subset,

wherein the downlink OL SU-MIMO codebook subset comprises at least one codeword, a number of codewords determined based on a rank, and a number of transmission antennas.

56. The apparatus of claim 55 , wherein the feedback information comprises at least one of a rank, a Channel Quality Indicator (CQI), and a subband index.

57. The apparatus of claim 55 , wherein the at least one antenna consists of eight antennas and the downlink OL SU-MIMO codebook comprises a relation between a rank and a codebook subset size N w corresponding to the rank in the following table:

rank

N w

58. The apparatus of claim 57 , wherein when the eight transmission antennas are used, the downlink OL SU-MIMO codebook comprises the following table:

C DLOLSU (8,1,8,n)

C DLOLSU (8,2,4,n)

C DLOLSU (8,3,4,n)

C DLOLSU (8,4,2,n)

C(8,1,4,m) in

C(8,2,4,m) in

C(8,3,4,m) in

C(8,4,4,m) in

base

codebook

C(8,1,4,0)

C(8,2,4,0)

C(8,3,4,0)

C(8,4,4,0)

C(8,1,4,3)

C(8,2,4,1)

C(8,3,4,1)

C(8,4,4,1)

C(8,1,4,5)

C(8,2,4,2)

C(8,3,4,2)

C(8,1,4,7)

C(8,2,4,3)

C(8,3,4,5)

C(8,1,4,9)

C(8,1,4,11)

C(8,1,4,13)

C(8,1,4,15)

C DLOLSU (8,5,2,n)

C DLOLSU (8,6,2,n)

C DLOLSU (8,7,2,n)

C DLOLSU (8,8,1,n)

C(8,5,4,m) in

C(8,6,4,m) in

C(8,7,4,m) in

C(8,8,4,m) in

base

codebook

C(8,5,4,0)

C(8,6,4,0)

C(8,7,4,0)

C(8,8,4,0)

C(8,5,4,1)

C(8,6,4,1)

C(8,7,4,1)

59. The apparatus of claim 55 , wherein the at least one antenna consists of four antennas and the downlink OL SU-MIMO codebook comprises a relation between a rank and a codebook subset size N w corresponding to the rank in the following table:

rank

N w

60. The apparatus of claim 59 , wherein when the four transmission antennas are used, the downlink OL SU-MIMO codebook comprises the following table:

C DLOLSU (4,1,4,n)

C DLOLSU (4,2,4,n)

C DLOLSU (4,3,2,n)

C DLOLSU (4,4,1,n)

C(4,1,6,m) in

C(4,2,6,m) in

C(4,3,6,m) in

C(4,4,6,m) in

base

codebook

C(4,1,6,8)

C(4,2,6,23)

C(4,3,6,12)

C(4,4,6,4)

C(4,1,6,10)

C(4,2,6,29)

C(4,3,6,13)

C(4,1,6,9)

C(4,2,6,27)

C(4,1,6,11)

C(4,2,6,25)

61. The apparatus of claim 55 , wherein the at least one antenna consists of two antennas and the downlink OL SU-MIMO codebook comprises a relation between a rank and a codebook subset size N w corresponding to the rank in the following table:

rank

N w

62. The apparatus of claim 61 , wherein when the two transmission antennas are used, the downlink OL SU-MIMO codebook comprises the following table:

C DLOLSU (2,1,2,n)

C DLOLSU (2,2,1,n)

C(2,1,3,m) in

C(2,2,3,m) in base

base codebook

codebook

C(2,1,3,2)

C(2,2,3,2)

C(2,1,3,6)

63. The apparatus of claim 61 , wherein when the two transmission antennas are used, the downlink OL SU-MIMO codebook comprises the following table:

C DLOLSU (2,1,2,n)

C DLOLSU (2,2,1,n)

C(2,1,3,m) in base

C(2,2,3,m) in base

codebook

C(2,1,3,0)

C(2,2,3,0)

C(2,1,3,4)

64. The apparatus of claim 55 , wherein the at least one antenna consists of four antennas and the downlink OL SU-MIMO codebook comprises a relation between a rank and a codebook subset size N w corresponding to the rank in the following table:

rank

N w

65. The apparatus of claim 64 , wherein when the two transmission antennas are used, the downlink OL SU-MIMO codebook comprises the following table:

C DLOLSU (2,1,4,n)

C DLOLSU (2,2,2,n)

C(2,1,4,m) in base

C(2,2,4,m) in base

codebook

C(2,1,4,0)

C(2,2,4,0)

C(2,1,4,2)

C(2,2,4,2)

C(2,1,4,4)

C(2,1,4,6)

66. The apparatus of claim 55 , wherein the at least one antenna consists of four antennas and the downlink OL SU-MIMO codebook comprises a relation between a rank and a codebook subset size N w corresponding to the rank in the following table:

rank

N w

67. The apparatus of claim 66 , wherein when the four transmission antennas are used, the downlink OL SU-MIMO codebook comprises the following table:

C DLOLSU (4,1,4,n)

C DLOLSU (4,2,2,n)

C DLOLSU (4,3,2,n)

C DLOLSU (4,4,1,n)

C(4,1,6,m) in

C(4,2,6,m) in

C(4,3,6,m) in

C(4,4,6,m) in

base

codebook

C(4,1,6,8)

C(4,2,6,23)

C(4,3,4,12)

C(4,4,3,4)

C(4,1,6,10)

C(4,2,6,29)

C(4,3,4,13)

C(4,1,6,9)

C(4,1,6,11)

68. The apparatus of claim 55 , wherein the at least one antenna consists of four antennas and the downlink OL SU-MIMO codebook comprises a relation between a rank and a codebook subset size N w corresponding to the rank in the following table:

rank

N w

69. The apparatus of claim 68 , wherein when the four transmission antennas are used, the downlink OL SU-MIMO codebook comprises the following table:

C ULOLSU (4,1,4,n)

C ULOLSU (4,2,4,n)

C ULOLSU (4,3,2,n)

C ULOLSU (4,4,1,n)

PMI m in UL

base

codebook of

codebook

rank 1

rank 2

rank 3

of rank 3

55.

70. The apparatus of claim 55 , wherein the downlink OL SU-MIMO codebook has a nested property where a precoder of a lower rank comprises one of ordered and unordered columns of a precoder of a higher rank.

Assignments (1)

ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 27, 2010

From: MAZZARESE, DAVID; CLERCKX, BRUNO; LEE, SANG-WOO

To: SAMSUNG ELECTRONICS CO., LTD.

Reel/Frame 024293/0911 →

Priority Claims (2)

KR 10-2009-0036638 · Apr 27, 2009 · national

KR 10-2010-0039047 · Apr 27, 2010 · national

Continuity (1)

Related Publication 20100272206A1 · Oct 28, 2010