Signal processing method and apparatus

1 . A signal processing method, comprising:

receiving, a reference signal on a first frequency-domain resource, wherein the reference signal is a reference signal of a first signal, wherein the first signal is a signal modulated by using π/2 binary phase shift keying (BPSK), wherein the first frequency-domain resource comprises K subcarriers each having a subcarrier number of k, wherein k=u+L×n+delta, wherein L is an integer greater than or equal to 2, delta∈{0, 1, . . . , L−1}, u is an integer, wherein subcarrier numbers of the K subcarriers are numbered in ascending or descending order according to frequencies of the K subcarriers, wherein the reference signal is generated based on a first sequence {x(n)} and a preset condition, wherein the preset condition is

x

n

=

A

·

e

j

×

π

×

s

n

8

,

 wherein a length of the first sequence is K=6, A is a non-zero complex number, and j=√{square root over (−1)}, and wherein a sequence {s(n)} is {7, 5, −1, −7, −3, 1}.

2 . The method according to claim 1 , wherein the method further comprises:

sending indication information, wherein the indication information is used to indicate a sequence that is in each of at least two sequence groups and used to generate the reference signal.

3 . An apparatus, comprising:

at least one processor; and

one or more memories coupled to the at least one processor and storing processor-executable instructions for execution by the at least one processor to perform operations comprising:

receiving a reference signal on a first frequency-domain resource, wherein the reference signal is a reference signal of a first signal, wherein the first signal is a signal modulated by using π/2 binary phase shift keying (BPSK), wherein the first frequency-domain resource comprises K subcarriers each having a subcarrier number of k, wherein k=u+L×n+delta, wherein L is an integer greater than or equal to 2, delta∈{0, 1, . . . , L−1}, u is an integer, wherein subcarrier numbers of the K subcarriers are numbered in ascending or descending order according to frequencies of the K subcarriers, wherein the reference signal is generated based on a first sequence {x(n)} and a preset condition, wherein the preset condition is

x

n

=

A

·

e

j

×

π

×

s

n

8

,

 wherein a length of the first sequence is K=6, A is a non-zero complex number, and j=√{square root over (−1)}, and wherein a sequence {s(n)} is {7, 5, −1, −7, −3, 1}.

4 . The apparatus according to claim 3 , wherein the at least one processor is further configured to control the transceiver to perform operations comprising:

sending indication information, wherein the indication information is used to indicate a sequence that is in each of at least two sequence groups and used to generate the reference signal.

5 . A signal processing method, comprising:

receiving, a reference signal on a first frequency-domain resource, wherein the reference signal is a reference signal of a first signal, wherein the first signal is a signal modulated by using π/2 binary phase shift keying (BPSK), wherein the first frequency-domain resource comprises K subcarriers each having a subcarrier number of k, wherein k=u+L×n+delta, wherein L is an integer greater than or equal to 2, delta∈{0, 1, . . . , L−1}, u is an integer, wherein subcarrier numbers of the K subcarriers are numbered in ascending or descending order according to frequencies of the K subcarriers, wherein the reference signal is generated based on a first sequence {x(n)} and a preset condition, wherein the preset condition is

x

n

=

A

·

e

j

×

n

×

s

n

8

,

 wherein a length of the first sequence is K=6, A is a non-zero complex number, and j=√{square root over (−1)}, and wherein a sequence {s(n)} is one of the following: {1, −3, 1, 5, −1, 3}, {1, −3, 1, −7, 7, −5}, {1, 5, 1, −5, −1, −3}, {1, 5, 1, −3, 1, 5}, {1, 7, 1, −5, −7, −1}, {1, 5, 1, 5, −5, 5}, {1, 5, 1, −1, 3, 7}, {1, −3, 1, −5, −1, 3}, {1, −3, 1, 5, 3, 7}, {1, 5, 3, 7, −1, −5}.

6 . The method according to claim 5 , wherein the method further comprises:

sending indication information, wherein the indication information is used to indicate a sequence that is in each of at least two sequence groups and used to generate the reference signal.

7 . An apparatus, comprising:

at least one processor; and

one or more memories coupled to the at least one processor and storing processor-executable instructions for execution by the at least one processor to perform operations comprising:

receiving a reference signal on a first frequency-domain resource, wherein the reference signal is a reference signal of a first signal, wherein the first signal is a signal modulated by using π/2 binary phase shift keying (BPSK), wherein the first frequency-domain resource comprises K subcarriers each having a subcarrier number of k, wherein k=u+L×n+delta, wherein L is an integer greater than or equal to 2, delta∈{0, 1, . . . , L−1}, u is an integer, wherein subcarrier numbers of the K subcarriers are numbered in ascending or descending order of frequencies, wherein the reference signal is generated based on a first sequence {x(n)} and a preset condition, wherein the preset condition is

x

n

=

A

·

e

j

×

π

×

s

n

8

,

 wherein a length of the first sequence is K=6, A is a non-zero complex number, and j=√{square root over (−1)}, and wherein a sequence {s(n)} is one of the following: {1, −3, 1, 5, −1, 3}, {1, −3, 1, −7, 7, −5}, {1, 5, 1, −5, −1, −3}, {1, 5, 1, −3, 1, 5}, {1, 7, 1, −5, −7, −1}, {1, 5, 1, 5, −5, 5}, {1, 5, 1, −1, 3, 7}, {1, −3, 1, −5, −1, 3}, {1, −3, 1, 5, 3, 7}, {1, 5, 3, 7, −1, −5}.

8 . The apparatus according to claim 7 , wherein the at least one processor is further configured to control the transceiver to perform operations comprising:

sending indication information, wherein the indication information is used to indicate a sequence that is in each of at least two sequence groups and used to generate the reference signal.