Data transmission method and apparatus, communication node, and storage medium

1 . A data transmission method, comprising:

modulating data in a time domain according to a set modulation manner to obtain modulated data, wherein the set modulation manner is associated with a time domain position of a modulation symbol in the modulated data; and

transmitting the modulated data;

wherein a modulation symbol in an odd position of the time domain and a modulation symbol in an even position of the time domain are located in different quadrants of a constellation diagram, so that modulation symbols in adjacent time domain positions are not in a same quadrant but in adjacent quadrants.

2 . The method according to claim 1 , wherein a position of the modulation symbol in the constellation diagram is associated with the time domain position.

3 . The method according to claim 1 , wherein the time domain position comprises a time domain position that has not been oversampled or a time domain position that has not been upsampled.

4 . The method according to claim 1 , wherein a data block of the modulated data comprises one of:

data information;

data information, a head reference signal, and a tail reference signal;

data information and an intermediate reference signal; or

data information, a head reference signal, a tail reference signal, and an intermediate reference signal.

5 . The method according to claim 1 , wherein the set modulation manner comprises a binary phase shift keying modulation with a phase rotation of π/2 (π/2 BPSK modulation).

6 . The method according to claim 5 , wherein

in each data block of the modulated data, a modulation symbol in an odd position is located in a second quadrant of the constellation diagram or a fourth quadrant of the constellation diagram, and a modulation symbol in an even position is located in a first quadrant of the constellation diagram or a third quadrant of the constellation diagram; or

in each slot corresponding to the modulated data, a modulation symbol in an odd position is located in the second quadrant of the constellation diagram or the fourth quadrant of the constellation diagram, and a modulation symbol in an even position is located in the first quadrant of the constellation diagram or the third quadrant of the constellation diagram.

7 . The method according to claim 1 , wherein the set modulation manner comprises a binary phase shift keying modulation with a phase rotation of π/4 (π/4 BPSK modulation); and

modulating the data in the time domain according to the set modulation manner to obtain the modulated data comprises:

performing a π/2 BPSK modulation on the data to obtain first modulated data; and

performing interpolating between two adjacent modulation symbols in each data block of the first modulated data to obtain the modulated data.

8 . The method according to claim 1 , wherein the set modulation manner comprises a π/2 BPSK modulation based on a delay accumulation; and

modulating the data in the time domain according to the set modulation manner to obtain the modulated data comprises:

performing the π/2 BPSK modulation on the data to obtain first modulated data; and

convolving the first modulated data with [√{square root over (2)}, √{square root over (2)}] to obtain the modulated data.

9 . The method according to claim 8 , wherein convolving the first modulated data with [√{square root over (2)}, √{square root over (2)}] comprises:

performing circular convolution on the first modulated data and [√{square root over (2)}, √{square root over (2)}].

10 . The method according to claim 1 , wherein the set modulation manner comprises a π/4 BPSK modulation based on a delay accumulation; and

modulating the data in the time domain according to the set modulation manner to obtain the modulated data comprises:

performing the π/4 BPSK modulation on the data to obtain second modulated data; and

convolving the second modulated data with [√{square root over (2)}, √{square root over (2)}] to obtain the modulated data.

11 . The method according to claim 10 , wherein performing the π/4 BPSK modulation on the data to obtain the second modulated data comprises:

performing a π/2 BPSK modulation on the data to obtain first modulated data; and

performing interpolating between two adjacent modulation symbols in each data block of the first modulated data to obtain the second modulated data.

12 . The method according to claim 10 , wherein convolving the second modulated data with [√{square root over (2)}, √{square root over (2)}] comprises:

performing circular convolution on the second modulated data and [√{square root over (2)}, √{square root over (2)}].

13 . The method according to claim 7 , wherein

in the each data block of the first modulated data, a modulation symbol in an odd position is located in a second quadrant of the constellation diagram or a fourth quadrant of the constellation diagram, and a modulation symbol in an even position is located in a first quadrant of the constellation diagram or a third quadrant of the constellation diagram; or

in each slot corresponding to the first modulated data, a modulation symbol in an odd position is located in the second quadrant of the constellation diagram or the fourth quadrant of the constellation diagram, and a modulation symbol in an even position is located in the first quadrant of the constellation diagram or the third quadrant of the constellation diagram.

14 . The method according to claim 7 , wherein in the each data block of the first modulated data, a last interpolation is determined according to a first modulation symbol in the each data block and a last modulation symbol in the each data block.

15 . The method according to claim 7 , wherein a phase of an interpolation between the two adjacent modulation symbols in the each data block of the first modulated data is a phase mean of the two adjacent modulation symbols, and a modulus of the interpolation is same as a modulus of the first modulated data.

16 . The method according to claim 1 , wherein the set modulation manner comprises an 8-quadrature amplitude modulation with a phase rotation of π/2 (π/2 8QAM);

in each data block of the modulated data, a modulation symbol in an odd position is located in a second quadrant of the constellation diagram or a fourth quadrant of the constellation diagram, and a modulation symbol in an even position is located in a first quadrant of the constellation diagram or a third quadrant of the constellation diagram; or

in each slot corresponding to the modulated data, a modulation symbol in an odd position is located in the second quadrant of the constellation diagram or the fourth quadrant of the constellation diagram, and a modulation symbol in an even position is located in the first quadrant of the constellation diagram or the third quadrant of the constellation diagram.

17 . The method according to claim 1 , wherein the set modulation manner comprises an 8-amplitude phase shift keying modulation with a phase rotation of π/2 (π/2 8APSK modulation);

in each data block of the modulated data, a modulation symbol in an odd position is located in a second quadrant of the constellation diagram or a fourth quadrant of the constellation diagram; and a modulation symbol in an even position is located in a first quadrant of the constellation diagram, in a third quadrant of the constellation diagram, or on a y axis of the constellation diagram; or

in each slot corresponding to the modulated data, a modulation symbol in an odd position is located in the second quadrant of the constellation diagram or the fourth quadrant of the constellation diagram; and a modulation symbol in an even position is located in the first quadrant of the constellation diagram, in the third quadrant of the constellation diagram, or on an x axis of the constellation diagram.

18 . The method according to claim 1 , wherein the set modulation manner comprises a single-carrier modulation.

19 . A communication node, comprising a memory, a processor and a computer program stored in the memory and executable by the processor, wherein when executing the program, the processor performs the following step:

modulating data in a time domain according to a set modulation manner to obtain modulated data, wherein the set modulation manner is associated with a time domain position of a modulation symbol in the modulated data; and

transmitting the modulated data;

wherein a modulation symbol in an odd position of the time domain and a modulation symbol in an even position of the time domain are located in different quadrants of a constellation diagram, so that modulation symbols in adjacent time domain positions are not in a same quadrant but in adjacent quadrants.

20 . A non-transitory computer-readable storage medium storing a computer program, wherein when executed by a processor, the computer program causes the processor to perform the following step:

modulating data in a time domain according to a set modulation manner to obtain modulated data, wherein the set modulation manner is associated with a time domain position of a modulation symbol in the modulated data; and

transmitting the modulated data;

wherein a modulation symbol in an odd position of the time domain and a modulation symbol in an even position of the time domain are located in different quadrants of a constellation diagram, so that modulation symbols in adjacent time domain positions are not in a same quadrant but in adjacent quadrants.