US 8,477,872 B2 · Multi-antenna system and method for transmitting and receiving information in multi-antenna system

Abstract

Embodiments of the present invention provide a method for transmitting information in a multi-antenna system. The method may include: a transmitting end receives information transmitted by a receiving end, wherein the information includes information of index of a precoder; the transmitting end selects a precoder from a two-layered codebook based on the information of the index of the precoder; the transmitting end precodes to-be-transmitted data by using the precoder; the transmitting end transmits the precoded data to the receiving end. The technical scheme of the present invention obtains codebooks most matching with channel distribution characteristics of dual-polarized antennas and minimizes performance loss brought by codebook quantization to remarkably improve the performances of precoding systems.

Claims13

Dependent claims

A method for transmitting information in a multi-antenna system, comprising:

receiving, by a transmitting end, information which comprises information of an index of a precoder transmitted by a receiving end;
selecting, by the transmitting end, a precoder from a dual-level codebook based on the information of the index of the precoder, and precoding to-be-transmitted data by using the precoder;
and
transmitting, by the transmitting end, the precoded data to the receiving end;
wherein at least one precoder c in the dual-level codebook satisfies:
c
=
[
[
1
φ
m
,
1
]
⊗
w
⁡
(
:
,
1
)
⁡
[
1
φ
m
,
2
]
⊗
w
⁡
(
:
,
2
)
⁢
⁢
⋯
⁢
[
1
φ
m
,
N
]
⊗
w
⁡
(
:
,
N
)
]
,
wherein w is a NT/2×N matrix,
[
1
1
⋯
1
φ
m
,
1
φ
m
,
2
⋯
φ
m
,
N
]
is a 2×N matrix, NT is the number of transmit antennas, N is Rank, φm,n denotes a complex number, denotes a Kronecker tensor product of matrices, w(:,n) denotes the n'th column of matrix w, and n=1, . . . , N.

78 more elements

A method for receiving information in a multi-antenna system, comprising:

receiving, by a receiving end, information transmitted by a transmitting end, measuring a channel based on the information;
selecting, by the receiving end, a precoder from a dual-level codebook according to information of the channel;
transmitting, by the receiving end, information of the index of the selected precoder to the transmitting end;
wherein at least one precoder c in the dual-level codebook satisfies:
c
=
[
[
1
φ
m
,
1
]
⊗
w
⁡
(
:
,
1
)
⁡
[
1
φ
m
,
2
]
⊗
w
⁡
(
:
,
2
)
⁢
⁢
⋯
⁢
[
1
φ
m
,
N
]
⊗
w
⁡
(
:
,
N
)
]
,
wherein w is a NT/2×N matrix,
Φ
m
=
[
1
1
⋯
1
φ
m
,
1
φ
m
,
2
⋯
φ
m
,
N
]
is a 2×N matrix, φm,n denotes a complex number, denotes a Kronecker tensor product of matrices, w(:, n) denotes the n'th column of matrix w, and n=1, . . . , N.

80 more elements

A multi-antenna system, comprising a transmitting end and a receiving end, wherein

the transmitting end comprises a receiving module, a precoding module and a transmitting module;
the receiving module is for receiving information transmitted by a receiving end, wherein the information comprises information of an index of a precoder;
the precoding module is for selecting a precoder from a dual-level codebook based on the information of the index of the precoder, and precoding to-be-transmitted data by using the precoder;
and
the transmitting module is for transmitting the precoded data to the receiving end;
wherein at least one precoder c in the dual-level codebook satisfies:
c
=
[
[
1
φ
m
,
1
]
⊗
w
⁡
(
:
,
1
)
⁡
[
1
φ
m
,
2
]
⊗
w
⁡
(
:
,
2
)
⁢
⁢
⋯
⁢
[
1
φ
m
,
N
]
⊗
w
⁡
(
:
,
N
)
]
wherein w is a NT/2×N matrix,
Φ
m
=
[
1
1
⋯
1
φ
m
,
1
φ
m
,
2
⋯
φ
m
,
N
]
is a 2×N matrix, φm,n denotes a complex number, denotes a Kronecker tensor product of matrices, w(:,n) denotes the w'th column of matrix n, and n=1, . . . , N.

81 more elements

Dependencies are inferred from the claim text.

Multi-antenna system and method for transmitting and receiving information in multi-antenna system

Life of this patent

Multi-antenna system and method for transmitting and receiving information in multi-antenna system

Life of this patent

Abstract

Claims13