US 11,057,085 B2Granted

Codebook subset restriction method

AssigneeHuawei Technologies Co., Ltd.

InventorsXueru Li, Ruiqi Zhang

Life of this patent

Estimating the term…

Abstract

A bit field indication manner is provided. A first field is determined, where the first field includes T1 bits, at least one of the T1 bits indicates at least two elements {bi0, bi1, . . . , bik} in a set B, the at least one bit further indicates at least one element {θj0, θj1, . . . , θjh} in a set Φ, and at least one element in {bi0, bi1, . . . , bik} and at least one element in {θj0, θj1, . . . , θjh} are used to form a preceding matrix, where the set B={b0, b1, L, bT2−1}, an element in the set B is a vector with a length of N/4, the set Φ={θ0, θ1, . . . , θS−1}, an element in Φ is a complex number of a unit amplitude.

Claims24

Dependent claims

A field notification method, wherein the method comprises:

determining, by a base station, a first field, wherein the first field comprises T1 bits, the T1 bits in the first field indicate one or more vectors that are allowed to be used to construct a precoding matrix W in a vector set, the precoding matrix W comprises N rows and R columns, N is greater than or equal to R;
and wherein
R is equal to 3 or 4, an lth column of the precoding matrix W satisfies:
W
⁡
(
l
)
=
[
b
k
l
(
-
1
)
l
⁢
θ
p
l
⁢
b
k
l
φ
l
⁢
b
k
l
(
-
1
)
l
⁢
φ
l
⁢
θ
p
l
⁢
b
k
l
]
,
⁢
b
k
l
⁢
⁢
satisfies
⁢
⁢
b
k
l
=
v
l
i
⊗
u
m
i
,
⁢
v
l
i
⁢
⁢
satisfies
⁢
⁢
v
l
i
=
[
1
e
j
⁢
⁢
4
⁢
π
⁢
l
i
N
1
⁢
O
1
…
e
j
⁢
⁢
4
⁢
π
⁢
(
N
1
/
2
-
1
)
⁢
l
i
N
1
⁢
O
1
]
T
,
⁢
u
m
i
⁢
⁢
satisfies
⁢
⁢
u
m
i
=
[
1
e
j
⁢
⁢
2
⁢
π
⁢
m
i
N
2
⁢
O
2
…
e
j
⁢
⁢
2
⁢
π
⁢
(
N
2
-
1
)
⁢
m
i
N
2
⁢
O
2
]
T
,
and
l is a non-negative integer smaller than or equal to R−1, i is an integer, mi is a non-negative integer smaller than or equal to N2O2−1, li is a non-negative integer smaller than or equal to
1
2
⁢
N
1
⁢
O
1
-
1
,
N1 and N2 are positive integers and separately represent numbers of antenna ports in different dimensions, O1 and O2 are positive integers separately representing Discrete Fourier Transform (DFT) vector oversampling factors in different dimensions, is an element of set Φ={θ0, θ1, . . . , θS−1}, S is a predefined positive integer, φl is a complex number of a unit amplitude, T1=N1O1N2O2, the vector set is vector set B, B={b0, b1, . . . , bT2−1},
T
2
=
1
2
⁢
N
1
⁢
O
1
⁢
N
2
⁢
O
2
,
a length of each vector in the vector set B is N/4, bit x of the T1 bits corresponds to a vector of vector set B, bit x indicates whether the corresponding vector is allowed to be used to construct the precoding matrix W, bit y of the T1 bits corresponds to two vectors of vector set B, bit y indicates whether the corresponding two vectors are allowed to be used to construct the precoding matrix W, x satisfies a condition:
⌊
x
K
2
⌋
is an even number, y satisfies a condition:
⌊
y
K
2
⌋
is an odd number, x and y are non-negative integers smaller or equal to T1−1, K2=N2O2, bk1 is selected from the one or more vectors that are indicated by the T1 bits;
and
sending, by the base station, the first field.

229 more elements

A communication device, wherein the device comprises:

a processor, configured to determine a first field, wherein the first field comprises T1 bits, the T1 bits in the first field indicate one or more vectors that are allowed to be used to construct a precoding matrix W in a vector set, the precoding matrix W comprises N rows and R columns, N is greater than or equal to R;
and wherein
R is equal to 3 or 4, an lth column of the precoding matrix W satisfies:
W
⁡
(
l
)
=
[
b
k
l
(
-
1
)
l
⁢
θ
p
l
⁢
b
k
l
φ
l
⁢
b
k
l
(
-
1
)
l
⁢
φ
l
⁢
θ
p
l
⁢
b
k
l
]
,
⁢
b
k
l
⁢
⁢
satisfies
⁢
⁢
b
k
l
=
v
l
i
⊗
u
m
i
,
⁢
v
l
i
⁢
⁢
satisfies
⁢
⁢
v
l
i
=
[
1
e
j
⁢
⁢
4
⁢
π
⁢
l
i
N
1
⁢
O
1
…
e
j
⁢
⁢
4
⁢
π
⁢
(
N
1
/
2
-
1
)
⁢
l
i
N
1
⁢
O
1
]
T
,
⁢
u
m
i
⁢
⁢
satisfies
⁢
⁢
u
m
i
=
[
1
e
j
⁢
⁢
2
⁢
π
⁢
m
i
N
2
⁢
O
2
…
e
j
⁢
⁢
2
⁢
π
⁢
(
N
2
-
1
)
⁢
m
i
N
2
⁢
O
2
]
T
,
and
l is a non-negative integer smaller than or equal to R−1, i is an integer, mi is a non-negative integer smaller than or equal to N2O2−1, li is a non-negative integer smaller than or equal to
1
2
⁢
N
1
⁢
O
1
-
1
,
N1 and N2 are positive integers and separately represent numbers of antenna ports in different dimensions, O1 and O2 are positive integers separately representing Discrete Fourier Transform (DFT) vector oversampling factors in different dimensions, is an element of set Φ={θ0, θ1, . . . , θS−1}, S is a predefined positive integer, φl is a complex number of a unit amplitude, T1=N1O1N2O2, the vector set is vector set B, B={b0, b1, . . . , bT2−1},
T
2
=
1
2
⁢
N
1
⁢
O
1
⁢
N
2
⁢
O
2
,
a length of each vector in the vector set B is N/4, bit x of the T1 bits corresponds to a vector of vector set B, bit x indicates whether the corresponding vector is allowed to be used to construct the precoding matrix W, bit y of the T1 bits corresponds to two vectors of vector set B, bit y indicates whether the corresponding two vectors are allowed to be used to construct the precoding matrix W, x satisfies a condition:
⌊
x
K
2
⌋
is an even number, y satisfies a condition:
⌊
y
K
2
⌋
is an odd number, x and y are non-negative integers smaller or equal to T1−1, K2=N2O2, is selected from the one or more vectors that are indicated by the T1 bits;
and
a transmitter, configured to send the first field.

229 more elements

A non-transitory computer-readable medium, comprising instructions, that when executed by one or more processors, cause the one or more processors to perform the following operations:

determining, a first field, wherein the first field comprises T1 bits, the T1 bits in the first field indicate one or more vectors that are allowed to be used to construct a precoding matrix W in a vector set, the precoding matrix W comprises N rows and R columns, N is greater than or equal to R;
and wherein
R is equal to 3 or 4, an lth column of the precoding matrix W satisfies:
W
⁡
(
l
)
=
[
b
k
l
(
-
1
)
l
⁢
θ
p
l
⁢
b
k
l
φ
l
⁢
b
k
l
(
-
1
)
l
⁢
φ
l
⁢
θ
p
l
⁢
b
k
l
]
,
⁢
b
k
l
⁢
⁢
satisfies
⁢
⁢
b
k
l
=
v
l
i
⊗
u
m
i
,
⁢
v
l
i
⁢
⁢
satisfies
⁢
⁢
v
l
i
=
[
1
e
j
⁢
⁢
4
⁢
π
⁢
l
i
N
1
⁢
O
1
…
e
j
⁢
⁢
4
⁢
π
⁢
(
N
1
/
2
-
1
)
⁢
l
i
N
1
⁢
O
1
]
T
,
⁢
u
m
i
⁢
⁢
satisfies
⁢
⁢
u
m
i
=
[
1
e
j
⁢
⁢
2
⁢
π
⁢
m
i
N
2
⁢
O
2
…
e
j
⁢
⁢
2
⁢
π
⁢
(
N
2
-
1
)
⁢
m
i
N
2
⁢
O
2
]
T
,
and
l is a non-negative integer smaller than or equal to R−1, i is an integer, mi is a non-negative integer smaller than or equal to N2O2−1, li is a non-negative integer smaller than or equal to
1
2
⁢
N
1
⁢
O
1
-
1
,
N1 and N2 are positive integers and separately represent numbers of antenna ports in different dimensions, O1 and O2 are positive integers separately representing Discrete Fourier Transform (DFT) vector oversampling factors in different dimensions, is an element of set Φ={θ0, θ1, . . . , θS−1}, S is a predefined positive integer, φl is a complex number of a unit amplitude, T1=N1O1N2O2, the vector set is vector set B, B={b0, b1, . . . , bT2−1},
T
2
=
1
2
⁢
N
1
⁢
O
1
⁢
N
2
⁢
O
2
,
a length of each vector in the vector set B is N/4, bit x of the T1 bits corresponds to a vector of vector set B, bit x indicates whether the corresponding vector is allowed to be used to construct the precoding matrix W, bit y of the T1 bits corresponds to two vectors of vector set B, bit y indicates whether the corresponding two vectors are allowed to be used to construct the precoding matrix W, x satisfies a condition:
⌊
x
K
2
⌋
is an even number, y satisfies a condition:
⌊
y
K
2
⌋
is an odd number, x and y are non-negative integers smaller or equal to T1−1, K2=N2O2, is selected from the one or more vectors that are indicated by the T1 bits;
and
sending the first field.

229 more elements

A communication device, comprising:

a non-transitory memory storage comprising instructions;
and
one or more hardware processors in communication with the non-transitory memory storage, wherein the one or more hardware processors execute the instructions to cause the communication device to perform following operations:
determining, by a base station, a first field, wherein the first field comprises T1 bits, the T1 bits in the first field indicate one or more vectors that are allowed to be used to construct a precoding matrix W in a vector set, the precoding matrix W comprises N rows and R columns, N is greater than or equal to R;
and wherein
R is equal to 3 or 4, an lth column of the precoding matrix W satisfies:
W
⁡
(
l
)
=
[
b
k
l
(
-
1
)
l
⁢
θ
p
l
⁢
b
k
l
φ
l
⁢
b
k
l
(
-
1
)
l
⁢
φ
l
⁢
θ
p
l
⁢
b
k
l
]
,
⁢
b
k
l
⁢
⁢
satisfies
⁢
⁢
b
k
l
=
v
l
i
⊗
u
m
i
,
⁢
v
l
i
⁢
⁢
satisfies
⁢
⁢
v
l
i
=
[
1
e
j
⁢
⁢
4
⁢
π
⁢
l
i
N
1
⁢
O
1
…
e
j
⁢
⁢
4
⁢
π
⁢
(
N
1
/
2
-
1
)
⁢
l
i
N
1
⁢
O
1
]
T
,
⁢
u
m
i
⁢
⁢
satisfies
⁢
⁢
u
m
i
=
[
1
e
j
⁢
⁢
2
⁢
π
⁢
m
i
N
2
⁢
O
2
…
e
j
⁢
⁢
2
⁢
π
⁢
(
N
2
-
1
)
⁢
m
i
N
2
⁢
O
2
]
T
,
and
l is a non-negative integer smaller than or equal to R−1, i is an integer, mi is a non-negative integer smaller than or equal to N2O2−1, li is a non-negative integer smaller than or equal to
1
2
⁢
N
1
⁢
O
1
-
1
,
N1 and N2 are positive integers and separately represent numbers of antenna ports in different dimensions, O1 and O2 are positive integers separately representing Discrete Fourier Transform (DFT) vector oversampling factors in different dimensions, is an element of set Φ={θ0, θ1, . . . , θS−1}, S is a predefined positive integer, φl is a complex number of a unit amplitude, T1=N1O1N2O2, the vector set is vector set B, B={b0, b1, . . . , bT2−1},
T
2
=
1
2
⁢
N
1
⁢
O
1
⁢
N
2
⁢
O
2
,
a length of each vector in the vector set B is N/4, bit x of the T1 bits corresponds to a vector of vector set B, bit x indicates whether the corresponding vector is allowed to be used to construct the precoding matrix W, bit y of the T1 bits corresponds to two vectors of vector set B, bit y indicates whether the corresponding two vectors are allowed to be used to construct the precoding matrix W, x satisfies a condition:
⌊
x
K
2
⌋
is an even number, y satisfies a condition:
⌊
y
K
2
⌋
is an odd number, x and y are non-negative integers smaller or equal to T1−1, K2=N2O2, is selected from the one or more vectors that are indicated by the T1 bits;
and
sending, by the base station, the first field.

232 more elements

A field notification method, wherein the method comprises:

receiving, by a user equipment, a first field, wherein the first field comprises T1 bits, the T1 bits in the first field indicate one or more vectors that are allowed to be used to construct a precoding matrix W in a vector set, the precoding matrix W comprises N rows and R columns, N is greater than or equal to R;
and wherein R is equal to 3 or 4, an lth column of the precoding matrix W satisfies:
W
⁡
(
l
)
=
{
b
k
l
(
-
1
)
l
⁢
θ
p
l
⁢
b
k
l
φ
l
⁢
b
k
l
(
-
1
)
l
⁢
φ
l
⁢
θ
p
l
⁢
b
k
l
}
,
⁢
b
k
l
⁢
⁢
satisfies
⁢
⁢
b
k
l
=
v
l
i
⊗
u
m
i
,
⁢
V
l
i
⁢
⁢
satisfies
⁢
⁢
v
l
i
,
=
[
1
⁢
e
j
⁢
⁢
4
⁢
⁢
π
⁢
l
i
N
1
⁢
O
1
⁢
⁢
⁢
…
⁢
⁢
e
j
⁢
⁢
4
⁢
⁢
π
⁢
(
N
1
/
2
-
1
)
⁢
l
i
N
1
⁢
O
1
]
T
,
⁢
u
m
i
⁢
⁢
satisfies
⁢
⁢
u
m
i
=
[
1
⁢
e
j
⁢
⁢
2
⁢
⁢
π
⁢
m
i
N
2
⁢
O
2
⁢
⁢
…
⁢
⁢
e
j
⁢
⁢
2
⁢
⁢
π
⁢
(
N
2
-
1
)
⁢
m
i
N
2
⁢
O
2
]
T
,
and
l is a non-negative integer smaller than or equal to R−1, i is an integer, mi is a non-negative integer smaller than or equal to N2O2−1, li is a non-negative integer smaller than or equal to
1
2
⁢
N
1
⁢
O
1
-
1
,
N
1
and N2 are positive integers and separately represent numbers of antenna ports in different dimensions, O1 and O2 are positive integers separately representing Discrete Fourier Transform (DFT) vector oversampling factors in different dimensions, is an element of set Φ={θ0, θ1, . . . , θS−1}, S is a predefined positive integer, φl is a complex number of a unit amplitude, T1=N1O1N2O2, the vector set is vector set B, B={b0, b1, . . . , bT2−1},
T
2
=
1
2
⁢
N
1
⁢
O
1
⁢
N
2
⁢
O
2
,
a length of each vector in the vector set B is N/4, bit x of the T1 bits corresponds to a vector of vector set B, bit x indicates whether the corresponding vector is allowed to be used to construct the precoding matrix W, bit y of the T1 bits corresponds to two vectors of vector set B, bit y indicates whether the corresponding two vectors are allowed to be used to construct the precoding matrix W, x satisfies a condition:
⌊
x
K
2
⌋
is an even number, y satisfies a condition:
⌊
y
K
2
⌋
is an odd number, x and y are non-negative integers smaller or equal to T1−1, K2=N2O2, is selected from the one or more vectors that are indicated by the T1 bits;
and
determining, by the user equipment, the one or more vectors based on the T1 bits.

246 more elements

A communication device, wherein the device comprises:

a receiver, configured to receive a first field, wherein the first field comprises T1 bits, the T1 bits in the first field indicate one or more vectors that are allowed to be used to construct a precoding matrix W in a vector set, the precoding matrix W comprises N rows and R columns, N is greater than or equal to R;
and wherein
R is equal to 3 or 4, an lth column of the precoding matrix W satisfies:
W
⁡
(
l
)
=
[
b
k
l
(
-
1
)
l
⁢
θ
p
l
⁢
b
k
l
φ
l
⁢
b
k
l
(
-
1
)
l
⁢
φ
l
⁢
θ
p
l
⁢
b
k
l
]
,
⁢
b
k
l
⁢
⁢
satisfies
⁢
⁢
b
k
l
=
v
l
i
⊗
u
m
i
,
⁢
v
l
i
⁢
⁢
satisfies
⁢
⁢
v
l
i
=
[
1
⁢
⁢
e
j
⁢
4π
⁢
l
i
N
1
⁢
O
1
⁢
…
⁢
⁢
e
j
⁢
4
π
⁢
(
N
1
/
2
-
1
)
⁢
l
i
N
1
⁢
O
1
]
T
,
⁢
u
m
i
⁢
⁢
satisfies
⁢
⁢
u
m
i
=
[
1
⁢
⁢
e
j
⁢
2π
⁢
m
i
N
2
⁢
O
2
⁢
⁢
…
⁢
⁢
e
j
⁢
2π
⁢
(
N
2
-
1
)
⁢
m
i
N
2
⁢
O
2
]
T
,
and
l is a non-negative integer smaller than or equal to R−1, i is an integer, mi is a non-negative integer smaller than or equal to N2O2−1, li is a non-negative integer smaller than or equal to
1
2
⁢
N
1
⁢
O
1
-
1
,
N1 and N2 are positive integers and separately represent numbers of antenna ports in different dimensions, O1 and O2 are positive integers separately representing Discrete Fourier Transform (DFT) vector oversampling factors in different dimensions, is an element of set Φ={θ0, θ1, . . . , θS−1}, S is a predefined positive integer, φl is a complex number of a unit amplitude, T1=N1O1N2O2, the vector set is vector set B, B={b0, b1, . . . , bT2−1},
T
2
=
1
2
⁢
N
1
⁢
O
1
⁢
N
2
⁢
O
2
,
a length of each vector in the vector set B is N/4, bit x of the T1 bits corresponds to a vector of vector set B, bit x indicates whether the corresponding vector is allowed to be used to construct the precoding matrix W, bit y of the T1 bits corresponds to two vectors of vector set B, bit y indicates whether the corresponding two vectors are allowed to be used to construct the precoding matrix W, x satisfies a condition:
⌊
x
K
2
⌋
is an even number, y satisfies a condition:
⌊
y
K
2
⌋
is an odd number, x and y are non-negative integers smaller or equal to T1−1, K2=N2O2, is selected from the one or more vectors that are indicated by the T1 bits;
and
a processor, configured to determine the one or more vectors based on the T1 bits.

229 more elements

A non-transitory computer-readable medium, comprising instructions, that when executed by one or more processors, cause the one or more processors to perform the following operations:

receiving, a first field, wherein the first field comprises T1 bits, the T1 bits in the first field indicate one or more vectors that are allowed to be used to construct a precoding matrix W in a vector set, the precoding matrix W comprises N rows and R columns, N is greater than or equal to R;
and wherein
R is equal to 3 or 4, an lth column of the precoding matrix W satisfies:
W
⁡
(
l
)
=
[
b
k
l
(
-
1
)
l
⁢
θ
p
l
⁢
b
k
l
φ
l
⁢
b
k
l
(
-
1
)
l
⁢
φ
l
⁢
θ
p
l
⁢
b
k
l
]
,
⁢
b
k
l
⁢
⁢
satisfies
⁢
⁢
b
k
l
=
v
l
i
⊗
u
m
i
,
⁢
v
l
i
⁢
⁢
satisfies
⁢
⁢
v
l
i
=
[
1
⁢
⁢
e
j
⁢
4π
⁢
l
i
N
1
⁢
O
1
⁢
…
⁢
⁢
e
j
⁢
4
π
⁢
(
N
1
/
2
-
1
)
⁢
l
i
N
1
⁢
O
1
]
T
,
⁢
u
m
i
⁢
⁢
satisfies
⁢
⁢
u
m
i
=
[
1
⁢
⁢
e
j
⁢
2π
⁢
m
i
N
2
⁢
O
2
⁢
⁢
…
⁢
⁢
e
j
⁢
2π
⁢
(
N
2
-
1
)
⁢
m
i
N
2
⁢
O
2
]
T
,
and
l is a non-negative integer smaller than or equal to R−1, i is an integer, mi is a non-negative integer smaller than or equal to N2O2−1, li is a non-negative integer smaller than or equal to
1
2
⁢
N
1
⁢
O
1
-
1
,
N1 and N2 are positive integers and separately represent numbers of antenna ports in different dimensions, O1 and O2 are positive integers separately representing Discrete Fourier Transform (DFT) vector oversampling factors in different dimensions, is an element of set Φ={θ0, θ1, . . . , θS−1}, S is a predefined positive integer, φl is a complex number of a unit amplitude, T1=N1O1N2O2, the vector set is vector set B, B={b0, b1, . . . , bT2−1},
T
2
=
1
2
⁢
N
1
⁢
O
1
⁢
N
2
⁢
O
2
,
a length of each vector in the vector set B is N/4, bit x of the T1 bits corresponds to a vector of vector set B, bit x indicates whether the corresponding vector is allowed to be used to construct the precoding matrix W, bit y of the T1 bits corresponds to two vectors of vector set B, bit y indicates whether the corresponding two vectors are allowed to be used to construct the precoding matrix W, x satisfies a condition:
⌊
x
K
2
⌋
is an even number, y satisfies a condition:
⌊
y
K
2
⌋
is an odd number, x and y are non-negative integers smaller or equal to T1−1, K2=N2O2, is selected from the one or more vectors that are indicated by the T1 bits;
and
determining the one or more vectors based on the T1 bits.

229 more elements

A communication device, comprising:

a non-transitory memory storage comprising instructions;
and
one or more hardware processors in communication with the non-transitory memory storage, wherein the one or more hardware processors execute the instructions to cause the communication device to perform following operations:
receiving, a first field, wherein the first field comprises T1 bits, the T1 bits in the first field indicate one or more vectors that are allowed to be used to construct a precoding matrix W in a vector set, the precoding matrix W comprises N rows and R columns, N is greater than or equal to R;
and wherein
R is equal to 3 or 4, an lth column of the precoding matrix W satisfies:
W
⁡
(
l
)
=
[
b
k
l
(
-
1
)
l
⁢
θ
p
l
⁢
b
k
l
φ
l
⁢
b
k
l
(
-
1
)
l
⁢
φ
l
⁢
θ
p
l
⁢
b
k
l
]
,
⁢
b
k
l
⁢
⁢
satisfies
⁢
⁢
b
k
l
=
v
l
i
⊗
u
m
i
,
⁢
v
l
i
⁢
⁢
satisfies
⁢
⁢
v
l
i
=
[
1
⁢
⁢
e
j
⁢
4π
⁢
l
i
N
1
⁢
O
1
⁢
…
⁢
⁢
e
j
⁢
4
π
⁢
(
N
1
/
2
-
1
)
⁢
l
i
N
1
⁢
O
1
]
T
,
⁢
u
m
i
⁢
⁢
satisfies
⁢
⁢
u
m
i
=
[
1
⁢
⁢
e
j
⁢
2π
⁢
m
i
N
2
⁢
O
2
⁢
⁢
…
⁢
⁢
e
j
⁢
2π
⁢
(
N
2
-
1
)
⁢
m
i
N
2
⁢
O
2
]
T
,
and
l is a non-negative integer smaller than or equal to R−1, i is an integer, mi is a non-negative integer smaller than or equal to N2O2−1, li is a non-negative integer smaller than or equal to
1
2
⁢
N
1
⁢
O
1
-
1
,
N1 and N2 are positive integers and separately represent numbers of antenna ports in different dimensions, O1 and O2 are positive integers separately representing Discrete Fourier Transform (DFT) vector oversampling factors in different dimensions, is an element of set Φ={θ0, θ1, . . . , θS−1}, S is a predefined positive integer, φl is a complex number of a unit amplitude, T1=N1O1N2O2, the vector set is vector set B, B={b0, b1, . . . , bT2−1},
T
2
=
1
2
⁢
N
1
⁢
O
1
⁢
N
2
⁢
O
2
,
a length of each vector in the vector set B is N/4, bit x of the T1 bits corresponds to a vector of vector set B, bit x indicates whether the corresponding vector is allowed to be used to construct the precoding matrix W, bit y of the T1 bits corresponds to two vectors of vector set B, bit y indicates whether the corresponding two vectors are allowed to be used to construct the precoding matrix W, x satisfies a condition:
⌊
x
K
2
⌋
is an even number, y satisfies a condition:
⌊
y
K
2
⌋
is an odd number, x and y are non-negative integers smaller or equal to T1−1, K2=N2O2, is selected from the one or more vectors that are indicated by the T1 bits;
and
determining the one or more vectors based on the T1 bits.

232 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/886,143Filed 28 May 2020 · continuation
Priority: CN 201710809290.810 Sep 2017
Published: US 2020/0295807 A117 Sep 2020
Granted: 6 Jul 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H04B 7/0481
Special codebook structures directed to feedback optimisation: using subset selection of codebooks
H04B 7/0417
MIMO systems: feedback systems
H04B 7/0456
MIMO systems: selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
H04B 7/0482
Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting: adaptive codebooks

Family

PCT/CN2018/104805Parent of this continuation · filed 10 Sep 2018
Application16/560,768Parent of this continuation · filed 4 Sep 2019
US 2020/0295807 A1Pre-grant publication · published 17 Sep 2020
US 10,693,537 B2Parent of this continuation
US 2019/0393938 A1Published application
US 11,057,085 B2This patent

From the US filing history. Foreign family members aren’t listed.

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Citations

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Abstract

A field notification method, wherein the method comprises:

determining, by a base station, a first field, wherein the first field comprises T1 bits, the T1 bits in the first field indicate one or more vectors that are allowed to be used to construct a precoding matrix W in a vector set, the precoding matrix W comprises N rows and R columns, N is greater than or equal to R;
and wherein
R is equal to 3 or 4, an lth column of the precoding matrix W satisfies:
W
⁡
(
l
)
=
[
b
k
l
(
-
1
)
l
⁢
θ
p
l
⁢
b
k
l
φ
l
⁢
b
k
l
(
-
1
)
l
⁢
φ
l
⁢
θ
p
l
⁢
b
k
l
]
,
⁢
b
k
l
⁢
⁢
satisfies
⁢
⁢
b
k
l
=
v
l
i
⊗
u
m
i
,
⁢
v
l
i
⁢
⁢
satisfies
⁢
⁢
v
l
i
=
[
1
e
j
⁢
⁢
4
⁢
π
⁢
l
i
N
1
⁢
O
1
…
e
j
⁢
⁢
4
⁢
π
⁢
(
N
1
/
2
-
1
)
⁢
l
i
N
1
⁢
O
1
]
T
,
⁢
u
m
i
⁢
⁢
satisfies
⁢
⁢
u
m
i
=
[
1
e
j
⁢
⁢
2
⁢
π
⁢
m
i
N
2
⁢
O
2
…
e
j
⁢
⁢
2
⁢
π
⁢
(
N
2
-
1
)
⁢
m
i
N
2
⁢
O
2
]
T
,
and
l is a non-negative integer smaller than or equal to R−1, i is an integer, mi is a non-negative integer smaller than or equal to N2O2−1, li is a non-negative integer smaller than or equal to
1
2
⁢
N
1
⁢
O
1
-
1
,
N1 and N2 are positive integers and separately represent numbers of antenna ports in different dimensions, O1 and O2 are positive integers separately representing Discrete Fourier Transform (DFT) vector oversampling factors in different dimensions, is an element of set Φ={θ0, θ1, . . . , θS−1}, S is a predefined positive integer, φl is a complex number of a unit amplitude, T1=N1O1N2O2, the vector set is vector set B, B={b0, b1, . . . , bT2−1},
T
2
=
1
2
⁢
N
1
⁢
O
1
⁢
N
2
⁢
O
2
,
a length of each vector in the vector set B is N/4, bit x of the T1 bits corresponds to a vector of vector set B, bit x indicates whether the corresponding vector is allowed to be used to construct the precoding matrix W, bit y of the T1 bits corresponds to two vectors of vector set B, bit y indicates whether the corresponding two vectors are allowed to be used to construct the precoding matrix W, x satisfies a condition:
⌊
x
K
2
⌋
is an even number, y satisfies a condition:
⌊
y
K
2
⌋
is an odd number, x and y are non-negative integers smaller or equal to T1−1, K2=N2O2, bk1 is selected from the one or more vectors that are indicated by the T1 bits;
and
sending, by the base station, the first field.

229 more elements

Facts

Application

16/886,143Filed 28 May 2020 · continuation

Priority

CN 201710809290.810 Sep 2017

Published

US 2020/0295807 A117 Sep 2020

Granted

6 Jul 2021

Term ends

Not estimatedThe source records don’t support an estimate.

Classification7 codes

H04B 7/0481
Special codebook structures directed to feedback optimisation: using subset selection of codebooks
H04B 7/0417
MIMO systems: feedback systems
H04B 7/0456
MIMO systems: selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
H04B 7/0482
Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting: adaptive codebooks

Family

PCT/CN2018/104805Parent of this continuation · filed 10 Sep 2018

Application16/560,768Parent of this continuation · filed 4 Sep 2019

US 2020/0295807 A1Pre-grant publication · published 17 Sep 2020

US 10,693,537 B2Parent of this continuation

US 2019/0393938 A1Published application

US 11,057,085 B2This patent

From the US filing history. Foreign family members aren’t listed.