Signal sending method, signal receiving method, and device
AssigneeHuawei Technologies Co., Ltd.
InventorsMingxin Gong, Bingyu Qu, Yongxing Zhou
Life of this patent
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Abstract
A signal sending method, a signal receiving method, and a device for signal transmission or receiving are provided. A part that is of a first signal and that is carried on a kth subcarrier in an ith subcarrier group in N subcarrier groups is xi,nid(k), and a sequence {si,nid(k)} related to xi,nid(k) is one of enumerated sequences. The enumerated sequences are sequences with relatively good cross-correlation. Therefore, for two subcarrier groups, provided that selected {si,nid(k)} is two of the enumerated sequences, cross-correlation between signals carried in the two subcarrier groups can be ensured to be relatively good, thereby reducing interference between the signals and improving channel estimation performance.
Claims20
A signal sending method, comprising:
- determining a time-frequency resource, wherein the time-frequency resource comprises N subcarrier groups, an ith subcarrier group in the N subcarrier groups comprises Ki subcarriers, the Ki subcarriers are evenly spaced, N is a positive integer greater than or equal to 1, and Ki is an integer greater than 1;
- and
- sending a first signal on the N subcarrier groups, wherein a part that is of the first signal and that is carried in the ith subcarrier group in the N subcarrier groups is a first segment of a sequence {zq(m)};
- a length of the sequence {zq(m)} is M;
- the sequence meets zq(m)=yq(m mod Mzc), wherein m=0, 1, 2, . . . , M−1, M is an integer greater than 1, Mzc is a maximum prime number that is less than M or a minimum prime number that is larger than M;
- and
- K
- i
- <
- Mzc
- 2
- ,
- y
- q
- (
- t
- )
- =
- A
- ·
- exp
-
- (
- j
-
- α
-
- t
- )
-
- exp
-
- (
- -
- j
-
- π
-
- qt
- (
- t
- +
- 1
- )
- M
- zc
- )
- ,
- wherein A is a non-zero complex constant, t=0, 1, 2, . . . , Mzc−1, j=√{square root over (−1)}, α is a real number, q is determined based on an identifier of the first signal or a cell identifier, and q=└q+½┘, wherein q=Mzc·(nid+1)/p, nid∈{0, 1, 2, . . . , p−2}, p is a prime number greater than 2, and nid is determined based on the identifier of the first signal or the cell identifier.
A signal receiving method, comprising:
- receiving a first signal carried on N subcarrier groups, and obtaining a sequence that is carried by the first signal and that is in an ith subcarrier group in the N subcarrier groups, wherein N is a positive integer greater than or equal to 1, the sequence is a first segment of a sequence {zq(m)};
- a length of the sequence {zq(m)} is M;
- the sequence meets zq(m)=yq(m mod Mzc), wherein m=0, 1, 2, . . . , M−1, M is an integer greater than 1, Mzc is a maximum prime number that is less than M or a minimum prime number that is larger than M;
- and
- K
- i
- <
- M
-
- z
-
- c
- 2
- ,
- y
- q
- (
- t
- )
- =
- A
- ·
- exp
-
- (
- j
-
- α
-
- t
- )
-
- exp
-
- (
- -
- i
-
- π
-
- qt
- (
- t
- +
- 1
- )
- M
- z
-
- c
- )
- ,
- wherein A is a non-zero complex constant, t=0, 1, 2, . . . , Mzc−1, j=√{square root over (−1)}, α is a real number, q is determined based on an identifier of the first signal or a cell identifier, and q=└q+½┘, wherein q=Mzc·(nid+1)/p, nid∈{0, 1, 2, . . . , p−2}, p is a prime number greater than 2, and nid is determined based on the identifier of the first signal or the cell identifier;
- and
- processing the first signal.
A communication apparatus, comprising at least one processor and a transceiver, wherein the at least one processor is coupled to the transceiver;
- the at least one processor is configured to determine a time-frequency resource, wherein the time-frequency resource comprises N subcarrier groups, an ith subcarrier group in the N subcarrier groups comprises Ki subcarriers, the Ki subcarriers are evenly spaced, N is a positive integer greater than or equal to 1, and Ki is an integer greater than 1;
- and
- the transceiver is configured to send a first signal on the N subcarrier groups, wherein a part that is of the first signal and that is carried in the ith subcarrier group in the N subcarrier groups is a first segment of a sequence {zq(m)};
- a length of the sequence {zq(m)} is M;
- the sequence meets zq(m)=yq(m mod Mzc), wherein m=0, 1, 2, . . . , M−1, M is an integer greater than 1, Mzc is a maximum prime number that is less than M or a minimum prime number that is larger than M;
- and
- K
- i
- <
- M
- ZC
- 2
- ,
- y
- q
- (
- t
- )
- =
- A
- ·
- exp
-
- (
- j
-
- α
-
- t
- )
-
- exp
-
- (
- -
- j
-
- π
-
- qt
- (
- t
- +
- 1
- )
- M
- zc
- )
- ,
- wherein A is a non-zero complex constant, t=0, 1, 2, . . . , Mzc−1, j=√{square root over (−1)}, α is a real number, q is determined based on an identifier of the first signal or a cell identifier, and q=└q+½┘, wherein q=Mzc·(nid+1)/p, nid∈{0, 1, 2, . . . , p−2}, p is a prime number greater than 2, and nid is determined based on the identifier of the first signal or the cell identifier.
A communication apparatus, comprising at least one processor and a transceiver, wherein the at least one processor is coupled to the transceiver;
- the transceiver is configured to receive a first signal carried on N subcarrier groups, and obtaining a sequence that is carried by the first signal and that is in an ith subcarrier group in the N subcarrier groups, wherein N is a positive integer greater than or equal to 1, the sequence is a first segment of a sequence {zq(m)};
- a length of the sequence {zq(m)} is M;
- the sequence meets zq(m)=yq(m mod Mzc), wherein m=0, 1, 2, . . . , M−1, M is an integer greater than 1, Mzc is a maximum prime number that is less than M or a minimum prime number that is larger than M;
- and Ki<Mzc/2, yq(t)=A·exp(jαt)exp
- K
- i
- <
- M
-
- z
-
- c
- 2
- ,
- y
- q
- (
- t
- )
- =
- A
- ·
- exp
-
- (
- j
-
- α
-
- t
- )
-
- exp
-
- (
- -
- j
-
- π
-
- qt
- (
- t
- +
- 1
- )
- M
- z
-
- c
- )
- ,
- wherein A is a non-zero complex constant, t=0, 1, 2, . . . , Mzc−1, j=√{square root over (−1)}, α is a real number, q is determined based on an identifier of the first signal or a cell identifier, and q=└q+½┘, wherein q=Mzc·(nid+1)/p, nid∈{0, 1, 2, . . . , p−2}, p is a prime number greater than 2, and nid is determined based on the identifier of the first signal or the cell identifier;
- and
- the at least one processor is configured to process the first signal.
Dependencies are inferred from the claim text.