CN110300080A - A kind of signal processing method and device - Google Patents

Abstract

In the signal processing method and device provided by the embodiments of the present invention, the transmitting end can multiply each first frequency domain signal among multiple identical first frequency domain signals by the corresponding phase information sequence to obtain the corresponding second frequency domain signal. The sideband information sequence corresponding to the second frequency domain signal is determined according to the preset correspondence between the phase information sequence and the sideband information sequence. According to the sideband information sequence corresponding to each second frequency domain signal, process each second frequency domain signal to obtain multiple time domain signals, and send the target time domain signal with the smallest peak-to-average ratio to the receiving end. After the receiving end obtains the target time domain signal sent by the sending end, it can determine The phase information sequence corresponding to the target time domain signal. Based on the above processing, the waste of bandwidth resources can be reduced.

Description

A signal processing method and device

technical field

The present invention relates to the technical field of wireless communication, in particular to a signal processing method and device.

Background technique

OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) technology, as a wireless communication transmission technology, has been widely used in systems such as high-definition television, wireless local area network, and digital video broadcasting.

In the communication system using OFDM technology, the sending end can modulate the signal to be transmitted to obtain multiple complex signals corresponding to the signal to be transmitted, and combine multiple complex signals into a frequency domain signal. The frequency domain signal is passed through IFFT (Inverse Fast Fourier Transform, fast Inverse Fourier transform) to obtain a time-domain signal. Since the frequency domain signal is composed of multiple complex signals, when there are complex signals with the same phase in the multiple complex signals, the waveforms of the complex signals with the same phase will be superimposed, resulting in a higher instantaneous peak value of the frequency domain signal , after IFFT, the obtained time-domain signal will have a higher peak-to-average ratio. If the peak-to-average ratio of the transmitted time-domain signal is too high, the time-domain signal may generate nonlinear distortion during transmission, which may cause the receiving end to be unable to correctly decode the signal sent by the sending end after receiving the time-domain signal. signal to be transmitted.

In the prior art, in order to enable the receiving end to correctly decode the signal to be transmitted sent by the transmitting end, the transmitting end copies the frequency domain signal corresponding to the signal to be transmitted to obtain multiple identical frequency domain signals, and then converts each A frequency-domain signal is multiplied by the corresponding phase information sequence to obtain multiple frequency-domain signals with different phase information, and after IFFT, multiple time-domain signals with different peak-to-average ratios are obtained, and then the signal with the smallest peak-to-average ratio can be obtained The time domain signal is sent to the receiver.

In addition, when sending the time-domain signal with the smallest peak-to-average ratio, the sending end also needs to send the identification of the corresponding phase information sequence to the receiving end, and the transmission of the identification needs to occupy a certain bandwidth, resulting in a waste of bandwidth resources.

Contents of the invention

The purpose of the embodiments of the present invention is to provide a signal processing method that can reduce the waste of bandwidth resources. The specific technical scheme is as follows:

In the first aspect, in order to achieve the above object, the embodiment of the present invention provides a signal processing method, the method is applied to the transmitting end in the OFDM system, and the OFDM system also includes the receiving end, so The methods described include:

Copying the frequency domain signal corresponding to the signal to be transmitted to obtain a first number of identical first frequency domain signals, wherein each first frequency domain signal includes multiple complex signals;

For each first frequency domain signal, multiply the first frequency domain signal by the corresponding phase information sequence to obtain a second frequency domain signal corresponding to the first frequency domain signal;

According to the preset correspondence between the phase information sequence and the sideband information sequence, determine the sideband information sequence corresponding to the phase information sequence corresponding to the first frequency domain signal as the first sideband information sequence, wherein the sideband information sequence The information sequence is used to adjust the amplitude of the complex signal contained in the frequency domain signal;

adjusting the amplitudes of multiple complex signals included in the second frequency domain signal corresponding to the first frequency domain signal according to the first sideband information sequence to obtain a corresponding third frequency domain signal;

performing inverse fast Fourier transform on the obtained first number of third frequency domain signals respectively to obtain the first number of time domain signals;

Sending the time-domain signal with the smallest peak-to-average ratio among the first number of time-domain signals to the receiving end, and using the time-domain signal with the smallest peak-to-average ratio as the target time-domain signal, so that the receiving end The amplitudes of multiple complex signals contained in the frequency domain signal corresponding to the time domain signal and the corresponding relationship between the phase information sequence and the sideband information sequence determine the phase information sequence corresponding to the target time domain signal.

Optionally, the first sideband information sequence includes a plurality of binary values, and the plurality of binary values are in one-to-one correspondence with the complex signals included in the second frequency domain signal;

According to the first sideband information sequence, adjusting the amplitudes of multiple complex signals included in the second frequency domain signal corresponding to the first frequency domain signal to obtain a corresponding third frequency domain signal, including:

Adjust the amplitude of the first complex signal contained in the second frequency domain signal according to a first preset formula, wherein the first complex signal is the first sideband in the second frequency domain signal For the complex signal corresponding to the binary value 1 contained in the information sequence, the first preset formula is:

X represents the first complex signal, X ^' represents a complex signal obtained by adjusting the amplitude of the first complex signal, and E represents a first preset value.

In the second aspect, in order to achieve the above object, the embodiment of the present invention provides a signal processing method, the method is applied to the receiving end in the Orthogonal Frequency Division Multiplexing OFDM system, and the OFDM system also includes the sending end, so The methods described include:

Acquiring the target time-domain signal sent by the sending end, wherein the target time-domain signal is a first number of the same first number of first signals to be transmitted by the sending end according to the preset correspondence between the phase information sequence and the sideband information sequence. The time-domain signal with the smallest peak-to-average ratio obtained after processing the frequency-domain signal;

performing fast Fourier transform on the target time domain signal to obtain a fourth frequency domain signal corresponding to the target time domain signal;

determining a target sideband information sequence corresponding to the fourth frequency domain signal according to amplitudes of multiple complex signals contained in the fourth frequency domain signal;

A target phase information sequence corresponding to the target sideband information sequence is determined according to a preset correspondence between the phase information sequence and the sideband information sequence.

Optionally, the determining the target sideband information sequence corresponding to the fourth frequency domain signal according to the amplitudes of multiple complex signals included in the fourth frequency domain signal includes:

For each complex signal included in the fourth frequency domain signal, determine whether the amplitude of the complex signal is greater than a second preset value;

If the amplitude of the complex signal is greater than the second preset value, then use 1 as the binary value corresponding to the complex signal in the second sideband information sequence;

If the amplitude of the complex signal is not greater than the second preset value, then use 0 as the binary value corresponding to the complex signal in the second sideband information sequence, wherein the second preset value is based on the second preset value Determined by two preset formulas, the second preset formula is:

m represents the second preset value, P represents the amplitude of the complex signal before adjustment, and E represents the first preset value;

Determine a target sideband information sequence corresponding to the fourth frequency domain signal according to the second sideband information sequence.

Optionally, the determining the target sideband information sequence corresponding to the fourth frequency domain signal according to the second sideband information sequence includes:

According to a third preset formula, determine the similarity between the second sideband information sequence and multiple preset sideband information sequences, wherein the third preset formula is:

D represents the similarity between the second side information sequence and a preset side information sequence, S _n represents the binary value contained in the preset side information sequence, and N represents that the second side information sequence contains The number of binary values of , S ^' _n represents the binary values contained in the second sideband information sequence;

Determine the target sideband information corresponding to the fourth frequency domain signal according to the candidate sideband information sequence having the greatest similarity with the second sideband information sequence among the plurality of preset sideband information sequences sequence.

Optionally, according to the candidate sideband information sequence having the greatest similarity with the second sideband information sequence among the plurality of preset sideband information sequences, determine The corresponding target sideband information sequence includes:

When there are multiple candidate sideband information sequences, for each candidate sideband information sequence, according to the binary value contained in the candidate sideband information sequence, generate the corresponding candidate sideband information sequence alternative signal;

According to a fourth preset formula, the energy difference between the fourth frequency domain signal and the candidate signal corresponding to the candidate sideband information sequence is determined, wherein the fourth preset formula is:

K represents the energy difference between the fourth frequency domain signal and the candidate signal corresponding to the candidate sideband information sequence, Y _n represents the amplitude of the complex signal contained in the fourth frequency domain signal, and Z _n represents The amplitude of the complex signal contained in the candidate signal corresponding to the candidate sideband information sequence, N represents the total number of complex signals contained in the fourth frequency domain signal;

A candidate sideband information sequence corresponding to a candidate signal having the smallest energy difference with the fourth frequency domain signal is used as a target sideband information sequence corresponding to the fourth frequency domain signal.

Optionally, after determining the target phase information sequence corresponding to the target sideband information sequence according to the preset correspondence between the phase information sequence and the sideband information sequence, the method further includes:

The amplitude of the second complex signal contained in the fourth frequency domain signal is adjusted according to the fifth preset formula to obtain a fifth frequency domain signal, wherein the second complex signal is the fourth frequency domain signal For the complex signal corresponding to the binary value 1 contained in the target sideband information sequence, the fifth preset formula is:

Y represents the second complex signal, Y ^' represents the complex signal obtained by adjusting the amplitude of the second complex signal, and E represents the first preset value;

multiplying the target phase information sequence by the fifth frequency domain signal to obtain a sixth frequency domain signal corresponding to the fifth frequency domain signal;

and performing decoding processing on the sixth frequency domain signal to obtain a signal to be transmitted sent by the sending end.

In the third aspect, in order to achieve the above object, an embodiment of the present invention provides a signal processing device, the device is applied to the transmitting end in an OFDM system, and the OFDM system also includes a receiving end, so Said devices include:

The copy module is used to copy the frequency domain signal corresponding to the signal to be transmitted to obtain a first number of identical first frequency domain signals, wherein each first frequency domain signal includes multiple complex signals;

The first processing module is configured to, for each first frequency domain signal, multiply the first frequency domain signal by a corresponding phase information sequence to obtain a second frequency domain signal corresponding to the first frequency domain signal;

The matching module is configured to determine a sideband information sequence corresponding to the phase information sequence corresponding to the first frequency domain signal as the first sideband information sequence according to the preset correspondence between the phase information sequence and the sideband information sequence, Wherein, the sideband information sequence is used to adjust the amplitude of the complex signal contained in the frequency domain signal;

An amplitude modulation module, configured to adjust the amplitudes of multiple complex signals included in the second frequency domain signal corresponding to the first frequency domain signal according to the first sideband information sequence, to obtain a corresponding third frequency domain signal;

The second processing module is configured to respectively perform inverse fast Fourier transform on the obtained first number of third frequency domain signals to obtain the first number of time domain signals;

A sending module, configured to send the time-domain signal with the smallest peak-to-average ratio among the first number of time-domain signals to the receiving end, and use the time-domain signal with the smallest peak-to-average ratio as the target time-domain signal, so that the receiving end The terminal determines the phase information sequence corresponding to the target time domain signal according to the amplitudes of multiple complex signals contained in the frequency domain signal corresponding to the target time domain signal and the corresponding relationship between the phase information sequence and the sideband information sequence .

Optionally, the first sideband information sequence includes a plurality of binary values, and the plurality of binary values are in one-to-one correspondence with the complex signals included in the second frequency domain signal;

The amplitude modulation module is specifically configured to adjust the amplitude of the first complex signal contained in the second frequency domain signal according to a first preset formula, wherein the first complex signal is the second frequency domain signal In the complex signal corresponding to the binary value 1 contained in the first sideband information sequence, the first preset formula is:

X represents the first complex signal, X ^' represents a complex signal obtained by adjusting the amplitude of the first complex signal, and E represents a first preset value.

In the fourth aspect, in order to achieve the above object, an embodiment of the present invention provides a signal processing device, the device is applied to a receiving end in an Orthogonal Frequency Division Multiplexing OFDM system, and the OFDM system also includes a transmitting end, so Said devices include:

An acquisition module, configured to acquire a target time-domain signal sent by the sending end, wherein the target time-domain signal is the first quantity to be transmitted by the sending end according to the preset correspondence between the phase information sequence and the sideband information sequence A time-domain signal with the smallest peak-to-average ratio obtained after processing the same first frequency-domain signal;

A first processing module, configured to perform fast Fourier transform on the target time domain signal to obtain a fourth frequency domain signal corresponding to the target time domain signal;

A determining module, configured to determine a target sideband information sequence corresponding to the fourth frequency domain signal according to the amplitudes of multiple complex signals contained in the fourth frequency domain signal;

The matching module is configured to determine the target phase information sequence corresponding to the target sideband information sequence according to the preset correspondence between the phase information sequence and the sideband information sequence.

Optionally, the determination module includes:

A judging submodule, configured to, for each complex signal included in the fourth frequency domain signal, judge whether the amplitude of the complex signal is greater than a second preset value;

The first processing submodule is configured to use 1 as the binary value corresponding to the complex signal in the second sideband information sequence if the amplitude of the complex signal is greater than the second preset value;

The second processing submodule is configured to use 0 as the binary value corresponding to the complex signal in the second sideband information sequence if the amplitude of the complex signal is not greater than the second preset value, wherein the The second preset value is determined according to a second preset formula, and the second preset formula is:

m represents the second preset value, P represents the amplitude of the complex signal before adjustment, and E represents the first preset value;

The determining submodule is configured to determine a target sideband information sequence corresponding to the fourth frequency domain signal according to the second sideband information sequence.

Optionally, the determining submodule includes:

The first determining unit is configured to determine the similarity between the second sideband information sequence and multiple preset sideband information sequences according to a third preset formula, wherein the third preset formula is:

D represents the similarity between the second side information sequence and a preset side information sequence, S _n represents the binary value contained in the preset side information sequence, and N represents that the second side information sequence contains The number of binary values of , S ^' _n represents the binary values contained in the second sideband information sequence;

The second determining unit is configured to determine a candidate sideband information sequence that has the greatest similarity with the second sideband information sequence among the plurality of preset sideband information sequences, and determine a sequence corresponding to the fourth frequency domain signal. The corresponding target side information sequence.

Optionally, the second determining unit includes:

The generation subunit is used to generate the candidate sideband information sequence according to the binary value contained in the candidate sideband information sequence for each candidate sideband information sequence when there are multiple candidate sideband information sequences. A candidate signal corresponding to the sideband information sequence;

The first determining subunit is configured to determine the energy difference between the fourth frequency domain signal and the candidate signal corresponding to the candidate sideband information sequence according to a fourth preset formula, wherein the fourth preset formula for:

K represents the energy difference between the fourth frequency domain signal and the candidate signal corresponding to the candidate sideband information sequence, Y _n represents the amplitude of the complex signal contained in the fourth frequency domain signal, and Z _n represents The amplitude of the complex signal contained in the candidate signal corresponding to the candidate sideband information sequence, N represents the total number of complex signals contained in the fourth frequency domain signal;

The second determination subunit is configured to use the candidate sideband information sequence corresponding to the candidate signal with the smallest energy difference value of the fourth frequency domain signal as the target side corresponding to the fourth frequency domain signal with information sequence.

Optionally, the device also includes:

The second processing module is configured to adjust the amplitude of the second complex signal included in the fourth frequency domain signal according to a fifth preset formula to obtain a fifth frequency domain signal, wherein the second complex signal is the The complex signal corresponding to the binary value 1 contained in the target sideband information sequence in the fourth frequency domain signal, the fifth preset formula is:

Y represents the second complex signal, Y ^' represents the complex signal obtained by adjusting the amplitude of the second complex signal, and E represents the first preset value;

multiplying the target phase information sequence by the fifth frequency domain signal to obtain a sixth frequency domain signal corresponding to the fifth frequency domain signal;

and performing decoding processing on the sixth frequency domain signal to obtain a signal to be transmitted sent by the sending end.

In another aspect of the implementation of the present invention, in order to achieve the above purpose, the embodiment of the present invention also provides an electronic device, which is characterized in that it includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, The memories communicate with each other through the communication bus;

memory for storing computer programs;

The processor is configured to implement the method steps for signal processing described in the first aspect above when executing the program stored in the memory.

In another aspect of the implementation of the present invention, in order to achieve the above purpose, the embodiment of the present invention also provides an electronic device, which is characterized in that it includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, The memories communicate with each other through the communication bus;

memory for storing computer programs;

The processor is configured to implement the method steps for signal processing described in the second aspect above when executing the program stored in the memory.

In yet another aspect of the implementation of the present invention, the embodiment of the present invention also provides a computer-readable storage medium, the computer-readable storage medium stores instructions, and when it is run on a computer, it causes the computer to execute the above-mentioned first The steps of the signal processing method described in the aspect.

In yet another aspect of the implementation of the present invention, the embodiment of the present invention also provides a computer-readable storage medium, the computer-readable storage medium stores instructions, and when it is run on a computer, it causes the computer to execute the above-mentioned second The steps of the signal processing method described in the aspect.

In yet another aspect of the implementation of the present invention, an embodiment of the present invention further provides a computer program product containing instructions, which when run on a computer, causes the computer to execute the signal processing method described in the first aspect above.

In yet another aspect of the implementation of the present invention, an embodiment of the present invention further provides a computer program product containing instructions, which when run on a computer, causes the computer to execute the signal processing method described in the second aspect above.

In the signal processing method and device provided by the embodiments of the present invention, the transmitting end can multiply each first frequency domain signal among multiple identical first frequency domain signals by the corresponding phase information sequence to obtain the corresponding second frequency domain signal. The sideband information sequence corresponding to the second frequency domain signal is determined according to the preset correspondence between the phase information sequence and the sideband information sequence. According to the sideband information sequence corresponding to each second frequency domain signal, process each second frequency domain signal to obtain multiple time domain signals, and send the target time domain signal with the smallest peak-to-average ratio to the receiving end. After the receiving end obtains the target time domain signal sent by the sending end, it can determine The phase information sequence corresponding to the target time domain signal.

Based on the above processing, both the sending end and the receiving end have a corresponding relationship between the phase information sequence and the sideband information sequence. The sending end determines the target time domain signal according to the corresponding relationship. Correspondingly, the receiving end can determine the target The phase information sequence corresponding to the time domain signal, that is, the sending end does not need to send the identification of the phase information sequence, and the receiving end can also determine the phase information sequence corresponding to the target time domain signal, thereby reducing the waste of bandwidth resources.

Of course, implementing any product or method of the present invention does not necessarily need to achieve all the above-mentioned advantages at the same time.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is an architecture diagram of an OFDM system provided by an embodiment of the present invention;

FIG. 2 is a flowchart of a signal processing method provided by an embodiment of the present invention;

FIG. 3 is a flowchart of a signal processing method provided by an embodiment of the present invention;

FIG. 4 is a structural diagram of a signal processing device provided by an embodiment of the present invention;

FIG. 5 is a structural diagram of a signal processing device provided by an embodiment of the present invention;

FIG. 6 is a structural diagram of an electronic device provided by an embodiment of the present invention;

FIG. 7 is a structural diagram of an electronic device provided by an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Embodiments of the present invention provide a signal processing method and device, which can be applied to a transmitting end and a receiving end in an OFDM system.

Referring to FIG. 1 , FIG. 1 is an architecture diagram of an OFDM system provided by an embodiment of the present invention, which is a possible application scenario. The OFDM system includes: a sending end and a receiving end.

The sending end can copy the frequency domain signal corresponding to the signal to be transmitted to obtain multiple identical frequency domain signals (ie, first frequency domain signals), and multiply each first frequency domain signal by its corresponding phase information sequence to obtain The frequency domain signals corresponding to each first frequency domain signal (ie, the second frequency domain signal), according to the preset correspondence between the phase information sequence and the sideband information sequence, determine the sideband information sequence corresponding to each second frequency domain signal, Furthermore, according to the sideband information sequence corresponding to each second frequency domain signal, the amplitude of the complex signal included in each second frequency domain signal is adjusted to obtain the frequency domain signal corresponding to each second frequency domain signal (that is, the third frequency domain signal), and perform inverse fast Fourier transform processing on each third frequency domain signal to obtain a plurality of time domain signals, and then, the time domain signal with the smallest peak-to-average ratio (ie, the target time domain signal) can be sent to the receiver end.

After the receiving end receives the target time-domain signal sent by the sending end, it can perform fast Fourier transform on the target time-domain signal to obtain the frequency-domain signal corresponding to the target time-domain signal (that is, the fourth frequency-domain signal), and then, according to the first The amplitude of multiple complex signals contained in the four-frequency domain signal determines the sideband information sequence corresponding to the target time domain signal, and then, according to the preset correspondence between the phase information sequence and the sideband information sequence, the target time domain signal can be determined Corresponding phase information sequence.

It can be seen that both the sending end and the receiving end have a corresponding relationship between the phase information sequence and the sideband information sequence. The sending end determines the target time domain signal according to the corresponding relationship. Correspondingly, the receiving end can determine the target time domain signal according to the corresponding relationship. The phase information sequence corresponding to the signal, that is, the sending end does not need to send the identification of the phase information sequence, and the receiving end can also determine the phase information sequence corresponding to the target time domain signal, thereby reducing the waste of bandwidth resources.

Referring to FIG. 2, FIG. 2 is a flow chart of a signal processing method provided by an embodiment of the present invention, the method is applied to a transmitting end in an OFDM system, and the OFDM system also includes a receiving end, which may include the following steps:

S201: Copy the frequency domain signal corresponding to the signal to be transmitted to obtain a first number of identical first frequency domain signals.

Wherein, each first frequency domain signal includes multiple complex signals. A signal to be transmitted can contain multiple binary signals. The first number can be set by a technician based on experience, the first number can be 16, and the first number can also be 64, but it is not limited thereto.

The sending end can modulate the binary signal contained in the signal to be transmitted to obtain multiple complex signals corresponding to the signal to be transmitted, and perform serial-to-parallel conversion processing on the multiple complex signals to obtain a frequency domain signal corresponding to the signal to be transmitted. Furthermore, the sending end may copy the frequency-domain signal corresponding to the signal to be transmitted to obtain multiple identical frequency-domain signals (that is, the first frequency-domain signal).

In one implementation, the transmitting end can adopt the QPSK (Quadrature Phase Shift Keying, quadrature phase shift keying signal) modulation method to modulate the two binary signals contained in the signal to be transmitted to obtain a complex signal, and then, can obtain Multiple complex signals corresponding to the signal to be transmitted.

In another implementation, in order to save bandwidth resources, the sending end can use 8PSK (8Phase ShiftKeying, 8 phase shift keying) modulation mode to modulate the three binary signals contained in the signal to be transmitted to obtain a complex signal, and then, A plurality of complex signals corresponding to the signal to be transmitted can be obtained.

Exemplarily, the first number is 3, and the modulation mode adopted by the sending end is QPSK modulation. The current signals to be transmitted include: 0, 0, 0, 1, 1, 0, 1, 1. The sending end can modulate 0 and 0 to obtain complex signal A, and modulate 0 and 1 to obtain complex signal B. Similarly, the complex signal C corresponding to 1 and 0, and the complex signal D corresponding to 1 and 1 can be obtained. Then, the sending end can perform serial-to-parallel conversion processing on the obtained multiple complex signals (ie, A, B, C, D) to obtain the frequency domain signal X=[A, B, C, D] corresponding to the signal to be transmitted. Furthermore, the sending end replicates the frequency-domain signal to obtain three identical frequency-domain signals: X1=[A, B, C, D], X2=[A, B, C, D], X3=[A, B, C, D].

S202: For each first frequency domain signal, multiply the first frequency domain signal by a corresponding phase information sequence to obtain a second frequency domain signal corresponding to the first frequency domain signal.

The transmitting end may have a phase information matrix, and each phase information sequence in the phase information matrix is in one-to-one correspondence with the first number of first frequency domain signals.

In an implementation manner, in order to effectively reduce the peak-to-average ratio of the time-domain signal corresponding to the signal to be transmitted, the phase information matrix may be a Hadamard (Hadamard) matrix.

Furthermore, the sending end may multiply the first number of first frequency domain signals by their respective corresponding phase information sequences to obtain respective corresponding frequency domain signals (that is, second frequency domain signals).

Exemplarily, the first number is 4, and the first frequency domain signal includes: X1=[A, B, C, D], X2=[A, B, C, D], X3=[A, B, C, D], X4=[A, B, C, D], the corresponding phase information sequences are: H1=[1,1,1,1], H2=[1,-1,1,-1], H3 =[1, 1, -1, -1], H4 = [1, -1, -1, 1], then the first frequency domain signal X1 is multiplied by the phase information sequence H1 to obtain the second frequency domain corresponding to X1 Domain signal X11 = [A, B, C, D]. Similarly, the second frequency domain signal X22=[A, -B, C, -D] corresponding to X2 can be obtained, and the second frequency domain signal X33=[A, B, -C, -D] corresponding to X3, X4 The corresponding second frequency domain signal X44=[A, -B, -C, D].

S203: Determine a sideband information sequence corresponding to the phase information sequence corresponding to the first frequency domain signal as the first sideband information sequence according to the preset correspondence between the phase information sequence and the sideband information sequence.

Wherein, the sideband information sequence is used to adjust the amplitude of the complex signal included in the frequency domain signal. The sending end has a corresponding relationship between the phase information sequence and the sideband information sequence.

For example, the sending end has a sideband information sequence corresponding to a phase information sequence one-to-one. If there are 5 phase information sequences, the transmitting end can generate a sideband information sequence corresponding to the 5 phase information sequences one-to-one. In one implementation manner, the sending end may first generate a first side information sequence, and then cyclically shift the binary values contained in the first side information sequence to obtain other multiple side information sequences.

In addition, in order to enable the receiving end to correctly decode the signal to be transmitted, when the sending end generates the sideband information sequence, it can set at most one of the same positions in every two sideband information sequences to have a corresponding value of 1, then determine the first The method of binary values contained in a sideband information sequence can be as follows: the number of consecutive 0s between every two 1s is incremented, and the number of consecutive 0s after the last 1 is greater than the number of consecutive 0s in front of the last 1 There are many.

Exemplarily, the phase information sequence includes: H1, H2, H3, H4, H5, H6, H7, H8, then the first sideband information sequence can be: S1=[0, 1, 0, 0, 1, 0 , 0, 0], do a cyclic shift of the binary value in S1 to the right to get S2=[0, 0, 1, 0, 0, 1, 0, 0]; move the binary value in S1 to the right Do 2 cyclic shifts to get S3 = [0, 0, 0, 1, 0, 0, 1, 0], and so on, you can get S4 = [0, 0, 0, 0, 1, 0, 0 , 1], S5=[1,0,0,0,0,1,0,0], S6=[0,1,0,0,0,0,1,0], S7=[0,0 , 1, 0, 0, 0, 0, 1], S8=[1, 0, 0, 1, 0, 0, 0, 0].

Moreover, the sideband information sequence S1 corresponds to the phase information sequence H1; the sideband information sequence S2 corresponds to the phase information sequence H2, and so on, the sideband information sequence corresponds to the phase information sequence one-to-one. If the phase information sequence corresponding to a certain second frequency domain signal is H1, then the sideband information sequence corresponding to the second frequency domain signal is S1 (ie, the first sideband information sequence).

S204: According to the first sideband information sequence, adjust amplitudes of multiple complex signals included in the second frequency domain signal corresponding to the first frequency domain signal, to obtain a corresponding third frequency domain signal.

The first sideband information sequence corresponding to the second frequency domain signal includes a plurality of binary values, and the plurality of binary values correspond to the complex signals included in the second frequency domain signal one by one. The sending end may adjust the amplitude of the first complex signal contained in the second frequency domain signal according to the first preset formula and the binary value contained in the first sideband information sequence corresponding to the second frequency domain signal.

Wherein, the first complex signal is a complex signal corresponding to the binary value 1 contained in the first sideband information sequence in the second frequency domain signal, and the first preset formula is:

X represents the first complex signal, X ^' represents the complex signal obtained by adjusting the amplitude of the first complex signal, and E represents the first preset value. When adjusting the amplitude of the first complex signal X according to the formula (1), the absolute value of the first complex signal X (i.e. |X|) can be processed to increase the amplitude of the first complex signal X, so that the receiving end can An amplitude-adjusted complex signal is detected. Also, after increasing the magnitude of the first complex signal according to ||X|+E|, multiply by The phase of the complex signal obtained by amplitude adjustment can be consistent with that of the first complex signal.

The first preset value may be set by a skilled person based on experience. For example, the first preset value may be a value that takes an absolute value of the amplitude of the complex signal before adjustment, but it is not limited thereto. Exemplarily, the first preset value may be E, if a certain second frequency domain signal is X=[A, -B], the determined sideband information sequence corresponding to the second frequency domain signal X is S=[ 0, 1], then the complex signal B contained in the second frequency domain signal X is the first complex signal, and the transmitting end can adjust the amplitude of the complex signal B contained in the second frequency domain signal X according to formula (1) , the resulting complex signal is:

Furthermore, it can be obtained that the frequency domain signal corresponding to the second frequency domain signal (that is, the third frequency domain signal) is: X ^′ =[A, B ^′ ].

S205: Perform inverse fast Fourier transform on the obtained first number of third frequency domain signals respectively to obtain the first number of time domain signals.

The method of performing IFFT on each third frequency domain signal is similar to the method of performing IFFT on frequency domain signals in the related art, and will not be repeated here.

S206: Send the time-domain signal with the smallest peak-to-average ratio among the first number of time-domain signals to the receiving end, and use the time-domain signal with the smallest peak-to-average ratio as the target time-domain signal, so that the receiving end The amplitudes of multiple complex signals included in the domain signal and the corresponding relationship between the phase information sequence and the sideband information sequence determine the phase information sequence corresponding to the target time domain signal.

After performing IFFT on each third frequency-domain signal to obtain multiple time-domain signals, the transmitting end can send the time-domain signal with the smallest peak-to-average ratio to the receiving end. Correspondingly, the receiving end can The amplitudes of multiple complex signals contained in the signal, and the corresponding relationship between the phase information sequence and the sideband information sequence determine the phase information sequence corresponding to the time domain signal, and the processing method at the receiving end will be introduced in detail in subsequent embodiments.

Based on the above processing, both the sending end and the receiving end have a corresponding relationship between the phase information sequence and the sideband information sequence. The sending end determines the target time domain signal according to the corresponding relationship. Correspondingly, the receiving end can determine the target The phase information sequence corresponding to the time domain signal, that is, the sending end does not need to send the identification of the phase information sequence, and the receiving end can also determine the phase information sequence corresponding to the target time domain signal, thereby reducing the waste of bandwidth resources.

Referring to FIG. 3, FIG. 3 is a flow chart of a signal processing method provided by an embodiment of the present invention. The method is applied to a receiving end in an OFDM system. The OFDM system also includes a sending end, and may include the following steps:

S301: Acquire a target time-domain signal sent by a sending end.

Among them, the target time domain signal is the time with the smallest peak-to-average ratio obtained by processing the first number of the same first frequency domain signals to be transmitted according to the preset correspondence between the phase information sequence and the sideband information sequence. domain signal. For the processing method at the sending end, refer to the detailed introduction in the foregoing embodiments.

S302: Perform fast Fourier transform on the target time domain signal to obtain a fourth frequency domain signal corresponding to the target time domain signal.

After receiving the target time-domain signal, the receiving end may perform FFT (Fast Fourier Transformation, Fast Fourier Transformation) on the target time-domain signal to obtain a frequency-domain signal corresponding to the target time-domain signal (that is, a fourth frequency-domain signal).

The method of performing FFT on the target time-domain signal is similar to the method of performing FFT on the time-domain signal in the related art, and will not be repeated here.

S303: Determine a target sideband information sequence corresponding to the fourth frequency domain signal according to amplitudes of multiple complex signals included in the fourth frequency domain signal.

In an implementation manner, for each complex signal included in the fourth frequency domain signal, it is judged whether the amplitude of the complex signal is greater than a second preset value. If the amplitude of the complex signal is greater than the second preset value, then 1 is used as the binary value corresponding to the complex signal in the second sideband information sequence; otherwise, 0 is used as the binary value corresponding to the complex signal in the second sideband information sequence the corresponding binary value.

Wherein, the second preset value is determined according to the second preset formula, and the second preset formula is:

m represents the second preset value, P represents the amplitude of the complex signal before adjustment, and E represents the first preset value. The first preset value can be set by a technician based on experience.

Exemplarily, the first preset value may be 4, the amplitude of the complex signal contained in the fourth frequency domain signal before adjustment is 2, and the second preset value m determined according to formula (2) is 3.

If the fourth frequency domain signal is X=[A, -B], the receiving end can determine whether the amplitude of the complex signal A included in the fourth frequency domain signal is greater than the second preset value (ie, 3). If so, the binary value corresponding to the complex signal A contained in the fourth frequency domain signal in the second sideband information sequence is 1; otherwise, the complex signal A contained in the second sideband information sequence and the fourth frequency domain signal The binary value corresponding to signal A is 0.

Similarly, the receiving end can determine the binary value corresponding to the complex signal B contained in the fourth frequency domain signal in the second sideband information sequence according to the amplitude of the complex signal B contained in the fourth frequency domain signal. Furthermore, the receiving end may determine the second sideband information sequence corresponding to the fourth frequency domain signal. Then, a target sideband information sequence corresponding to the fourth frequency domain signal may be determined according to the second sideband information sequence.

In an implementation manner, the receiving end may determine the similarity between the second sideband information sequence and multiple preset sideband information sequences according to a third preset formula, where the third preset formula is:

D represents the similarity between the second side information sequence and a preset side information sequence, S _n represents the binary value contained in the preset side information sequence, and N represents the binary value contained in the second side information sequence number, S' _n represents the binary value contained in the second sideband information sequence.

Exemplarily, the preset sideband information sequence includes: S1=[0, 1, 0, 0], S2=[0, 0, 1, 0], S3=[0, 0, 0, 1], S4= [1, 0, 0, 0], if the second side information sequence is S'=[1, 0, 1, 0], then the receiving end can calculate the second side information sequence S according to the formula (3) ' and the preset sideband information sequence S1 similarity D1=0, the second sideband information sequence S' and the preset sideband information sequence S2 similarity D2=1, the second sideband information sequence S' and the preset The similarity D3 of the sideband information sequence S3=0, and the similarity D4=1 of the second sideband information sequence S′ and the preset sideband information sequence S4.

Then, the sideband information sequence corresponding to the fourth frequency domain signal can be determined according to the sideband information sequence (that is, the candidate sideband information sequence) that has the largest similarity with the second sideband information sequence among the plurality of preset sideband information sequences. Target side information sequence.

In an implementation manner, when there is one candidate sideband information sequence, the receiving end may directly use the candidate sideband information sequence as the target sideband information sequence corresponding to the fourth frequency domain signal.

In another implementation, when there are multiple candidate sideband information sequences, for each candidate sideband information sequence, the receiving end can generate the candidate sideband information sequence according to the binary value contained in the candidate sideband information sequence. The candidate signal corresponding to the sideband information sequence.

For each complex signal contained in the candidate signal, if the complex signal corresponds to 0 in the candidate sideband information sequence corresponding to the candidate signal, set the amplitude of the complex signal as the signal to be transmitted at the transmitting end to be modulated The amplitude of the obtained complex signal; otherwise, set the amplitude of the complex signal to be the sum of the amplitude of the complex signal obtained by modulating the signal to be transmitted at the sending end and the first preset value.

Exemplarily, the first preset value is E, the complex signal obtained by modulating the signal to be transmitted at the transmitting end is X, and the optional sideband information sequences include: S1=[0, 0, 1, 0], S2=[1 , 0, 0, 0], then the candidate signal corresponding to the candidate sideband information sequence S1 can be Z1=[|X|, |X|, |X|+E, |X|], the candidate sideband information The candidate signal corresponding to the sequence S2 may be Z2=[|X|+E, |X|, |X|, |X|].

Then, the energy difference between the fourth frequency domain signal and the candidate signal corresponding to the candidate sideband information sequence may be determined according to a fourth preset formula, where the fourth preset formula is:

K represents the energy difference between the fourth frequency domain signal and the candidate signal corresponding to the candidate sideband information sequence, _Yn represents the amplitude of the complex signal contained in the fourth frequency domain signal, and _Zn represents the candidate sideband The amplitude of the complex signal included in the candidate signal corresponding to the information sequence, and N represents the total number of complex signals included in the fourth frequency domain signal.

Then, the candidate sideband information sequence corresponding to the candidate signal having the smallest energy difference with the fourth frequency domain signal may be used as the target sideband information sequence corresponding to the fourth frequency domain signal.

Exemplarily, the first preset value may be 4, and the amplitude of the complex signal contained in the fourth frequency domain signal before adjustment may be 2, if the fourth frequency domain signal is Y=[A, -B, C, D ], the amplitude of complex signal A is 5, the amplitude of complex signal-B is 2, the amplitude of complex signal C is 3, the amplitude of complex signal D is 3, and the alternative sideband information sequence is: S1=[0,0, 1,0], S2=[1,0,0,0], then the corresponding alternative signal is: Z1=[A, B, (C+4), D], Z2=[(A+4), B, C, D], the amplitudes of the complex signals contained in the candidate signal Z1 are respectively: 2, 2, 6, 2, and the amplitudes of the complex signals contained in the candidate signal Z2 are respectively: 6, 2, 2 ,2.

The receiving end determines the energy difference K1=53 between the fourth frequency domain signal Y and the candidate sideband information sequence Z1 and the energy difference K2=21 between the fourth frequency domain signal Y and the candidate sideband information sequence Z2 according to the formula (4). Then the receiving end may use the candidate sideband information sequence corresponding to Z2 (that is, S2 ) as the target sideband information sequence corresponding to the fourth frequency domain signal.

S304: Determine a target phase information sequence corresponding to the target sideband information sequence according to the preset correspondence between the phase information sequence and the sideband information sequence.

After determining the target sideband information sequence corresponding to the fourth frequency domain signal, the receiving end may determine the target phase information sequence corresponding to the target sideband information sequence according to the preset correspondence between the phase information sequence and the sideband information sequence.

Exemplarily, the preset sideband information sequence may be: S1, S2, S3, S4, the preset phase information sequence may be: H1, H2, H3, H4, the preset sideband information sequence and the preset phase information sequence are the same One-to-one correspondence, if the determined target sideband information sequence corresponding to the fourth frequency domain signal is S2, then the target phase information sequence corresponding to the target sideband information sequence is H2.

Optionally, after step S304, the method may further include the following step: adjusting the amplitude of the second complex signal included in the fourth frequency domain signal according to a fifth preset formula to obtain a fifth frequency domain signal.

Wherein, the second complex signal is a complex signal corresponding to the binary value 1 contained in the target sideband information sequence in the fourth frequency domain signal, and the fifth preset formula is:

Y represents the second complex signal, Y' represents the complex signal obtained by adjusting the amplitude of the second complex signal, and E represents the first preset value. In order for the receiving end to correctly decode the signal to be transmitted sent by the sending end, according to the formula ( 5) When adjusting the amplitude of the second complex signal Y, take the absolute value (ie |Y|) of the second complex signal Y to reduce the amplitude of the second complex signal Y. In addition, after reducing the magnitude of the second complex signal according to ||Y|-E|, multiply by The phase of the complex signal obtained by adjusting the amplitude can be consistent with that of the second complex signal.

The target phase information sequence is multiplied by the fifth frequency domain signal to obtain a sixth frequency domain signal corresponding to the fifth frequency domain signal.

Decoding the sixth frequency domain signal is performed to obtain the signal to be transmitted sent by the sending end.

After determining the target phase information sequence, the receiving end may also decode the fourth frequency domain signal according to the target sideband information sequence and the target phase information sequence corresponding to the fourth frequency domain signal, to obtain the signal to be transmitted sent by the transmitting end.

Exemplarily, the first preset value is E, if the fourth frequency domain signal is Y=[A, -B, C, -D], the determined target sideband information sequence is S=[1, 0, 1, 0], the corresponding target phase information sequence is H=[1, -1, -1, 1].

Then the complex signals A and C contained in the fourth frequency domain signal Y are the second complex signals, and the receiving end can calculate the second complex signals contained in the fourth frequency domain signal Y according to the formula (3) and the target sideband information sequence S. The complex signals (ie, A and C) are amplitude adjusted separately to obtain complex signals:

Furthermore, the corresponding frequency domain signal (that is, the fifth frequency domain signal) is obtained as: Y'=[A', -B, C', -D], and further, the receiving end can combine the target phase information sequence H with the fifth frequency domain The domain signal Y' is multiplied to obtain the corresponding frequency domain signal (i.e. the sixth frequency domain signal) as: Y "=[A', B, -C', -D], and then, the receiving end can calculate the sixth frequency domain signal The signal Y" is decoded to obtain the signal to be transmitted sent by the sending end.

Based on the above processing, both the sending end and the receiving end have a corresponding relationship between the phase information sequence and the sideband information sequence. The sending end determines the target time domain signal according to the corresponding relationship. Correspondingly, the receiving end can determine the target The phase information sequence corresponding to the time domain signal, that is, the sending end does not need to send the identification of the phase information sequence, and the receiving end can also determine the phase information sequence corresponding to the target time domain signal, thereby reducing the waste of bandwidth resources.

Corresponding to the method embodiment in Figure 2, see Figure 4, Figure 4 is a structural diagram of a signal processing device provided by an embodiment of the present invention, the device is applied to the transmitting end in an Orthogonal Frequency Division Multiplexing OFDM system, The OFDM system also includes a receiving end, and the device includes:

The replication module 401 is configured to replicate the frequency domain signal corresponding to the signal to be transmitted to obtain a first number of identical first frequency domain signals, wherein each first frequency domain signal includes multiple complex signals;

The first processing module 402 is configured to, for each first frequency domain signal, multiply the first frequency domain signal by a corresponding phase information sequence to obtain a second frequency domain signal corresponding to the first frequency domain signal;

The matching module 403 is configured to determine the sideband information sequence corresponding to the phase information sequence corresponding to the first frequency domain signal as the first sideband information sequence according to the preset correspondence between the phase information sequence and the sideband information sequence , wherein the sideband information sequence is used to adjust the amplitude of the complex signal in the frequency domain signal;

An amplitude modulation module 404, configured to adjust the amplitudes of multiple complex signals included in the second frequency domain signal corresponding to the first frequency domain signal according to the first sideband information sequence, to obtain a corresponding third frequency domain signal ;

The second processing module 405 is configured to respectively perform inverse fast Fourier transform on the obtained first number of third frequency domain signals to obtain the first number of time domain signals;

A sending module 406, configured to send the time-domain signal with the smallest peak-to-average ratio among the first number of time-domain signals to the receiving end, and use the time-domain signal with the smallest peak-to-average ratio as the target time-domain signal, so that the The receiving end determines the phase information corresponding to the target time domain signal according to the amplitudes of multiple complex signals contained in the frequency domain signal corresponding to the target time domain signal and the correspondence between the phase information sequence and the sideband information sequence sequence.

Optionally, the first sideband information sequence includes a plurality of binary values, and the plurality of binary values are in one-to-one correspondence with the complex signals included in the second frequency domain signal;

The amplitude modulation module 404 is specifically configured to adjust the amplitude of the first complex signal contained in the second frequency domain signal according to a first preset formula, wherein the first complex signal is the second frequency domain signal The complex signal corresponding to the binary value 1 contained in the first sideband information sequence in the signal, the first preset formula is:

X represents the first complex signal, X' represents a complex signal obtained by adjusting the amplitude of the first complex signal, and E represents a first preset value.

Corresponding to the method embodiment in Figure 3, see Figure 5, Figure 5 is a structural diagram of a signal processing device provided by an embodiment of the present invention, the device is applied to a receiving end in an Orthogonal Frequency Division Multiplexing OFDM system, The OFDM system also includes a sending end, and the device includes:

The acquiring module 501 is configured to acquire the target time-domain signal sent by the transmitting end, wherein the target time-domain signal is the first signal to be transmitted by the transmitting end according to the preset correspondence between the phase information sequence and the sideband information sequence. A time-domain signal with the smallest peak-to-average ratio obtained after processing the same number of first frequency-domain signals;

The first processing module 502 is configured to perform fast Fourier transform on the target time domain signal to obtain a fourth frequency domain signal corresponding to the target time domain signal;

A determination module 503, configured to determine a target sideband information sequence corresponding to the fourth frequency domain signal according to the amplitudes of multiple complex signals contained in the fourth frequency domain signal;

The matching module 504 is configured to determine a target phase information sequence corresponding to the target sideband information sequence according to a preset correspondence between a phase information sequence and a sideband information sequence.

Optionally, the determination module 503 includes:

A judging submodule, configured to, for each complex signal included in the fourth frequency domain signal, judge whether the amplitude of the complex signal is greater than a second preset value;

The first processing submodule is configured to use 1 as the binary value corresponding to the complex signal in the second sideband information sequence if the amplitude of the complex signal is greater than the second preset value;

The second processing submodule is configured to use 0 as the binary value corresponding to the complex signal in the second sideband information sequence if the amplitude of the complex signal is not greater than the second preset value, wherein the The second preset value is determined according to a second preset formula, and the second preset formula is:

m represents the second preset value, P represents the amplitude of the complex signal before adjustment, and E represents the first preset value;

The determining submodule is configured to determine a target sideband information sequence corresponding to the fourth frequency domain signal according to the second sideband information sequence.

Optionally, the determining submodule includes:

The first determining unit is configured to determine the similarity between the second sideband information sequence and multiple preset sideband information sequences according to a third preset formula, wherein the third preset formula is:

D represents the similarity between the second side information sequence and a preset side information sequence, S _n represents the binary value contained in the preset side information sequence, and N represents that the second side information sequence contains The number of binary values of , S' _n represents the binary values contained in the second sideband information sequence;

The second determining unit is configured to determine a candidate sideband information sequence that has the greatest similarity with the second sideband information sequence among the plurality of preset sideband information sequences, and determine a sequence corresponding to the fourth frequency domain signal. The corresponding target side information sequence.

Optionally, the second determining unit includes:

The generation subunit is used to generate the candidate sideband information sequence according to the binary value contained in the candidate sideband information sequence for each candidate sideband information sequence when there are multiple candidate sideband information sequences. A candidate signal corresponding to the sideband information sequence;

The first determining subunit is configured to determine the energy difference between the fourth frequency domain signal and the candidate signal corresponding to the candidate sideband information sequence according to a fourth preset formula, wherein the fourth preset formula for:

K represents the energy difference between the fourth frequency domain signal and the candidate signal corresponding to the candidate sideband information sequence, Y _n represents the amplitude of the complex signal contained in the fourth frequency domain signal, and Z _n represents The amplitude of the complex signal contained in the candidate signal corresponding to the candidate sideband information sequence, N represents the total number of complex signals contained in the fourth frequency domain signal;

The second determination subunit is configured to use the candidate sideband information sequence corresponding to the candidate signal with the smallest energy difference value of the fourth frequency domain signal as the target side corresponding to the fourth frequency domain signal with information sequence.

Optionally, the device also includes:

The second processing module is configured to adjust the amplitude of the second complex signal included in the fourth frequency domain signal according to a fifth preset formula to obtain a fifth frequency domain signal, wherein the second complex signal is the The complex signal corresponding to the binary value 1 contained in the target sideband information sequence in the fourth frequency domain signal, the fifth preset formula is:

Y represents the second complex signal, Y' represents a complex signal obtained by adjusting the amplitude of the second complex signal, and E represents a first preset value;

multiplying the target phase information sequence by the fifth frequency domain signal to obtain a sixth frequency domain signal corresponding to the fifth frequency domain signal;

and performing decoding processing on the sixth frequency domain signal to obtain a signal to be transmitted sent by the sending end.

Referring to FIG. 6, FIG. 6 is a structural diagram of an electronic device provided by an embodiment of the present invention, including a processor 601, a communication interface 602, a memory 603, and a communication bus 604, wherein the processor 601, the communication interface 602, and the memory 603 pass The communication bus 604 completes mutual communication,

Memory 603, used to store computer programs;

When the processor 601 is used to execute the program stored on the memory 603, the following steps are implemented:

Copying the frequency domain signal corresponding to the signal to be transmitted to obtain a first number of identical first frequency domain signals, wherein each first frequency domain signal includes multiple complex signals;

For each first frequency domain signal, multiply the first frequency domain signal by the corresponding phase information sequence to obtain a second frequency domain signal corresponding to the first frequency domain signal;

According to the preset correspondence between the phase information sequence and the sideband information sequence, determine the sideband information sequence corresponding to the phase information sequence corresponding to the first frequency domain signal as the first sideband information sequence, wherein the sideband information sequence The information sequence is used to adjust the amplitude of the complex signal contained in the frequency domain signal;

adjusting the amplitudes of multiple complex signals included in the second frequency domain signal corresponding to the first frequency domain signal according to the first sideband information sequence to obtain a corresponding third frequency domain signal;

performing inverse fast Fourier transform on the obtained first number of third frequency domain signals respectively to obtain the first number of time domain signals;

Sending the time-domain signal with the smallest peak-to-average ratio among the first number of time-domain signals to the receiving end, and using the time-domain signal with the smallest peak-to-average ratio as the target time-domain signal, so that the receiving end The amplitudes of multiple complex signals contained in the frequency domain signal corresponding to the time domain signal and the corresponding relationship between the phase information sequence and the sideband information sequence determine the phase information sequence corresponding to the target time domain signal.

Referring to FIG. 7, FIG. 7 is a structural diagram of an electronic device provided by an embodiment of the present invention, including a processor 701, a communication interface 702, a memory 703, and a communication bus 704, wherein the processor 701, the communication interface 702, and the memory 703 pass through The communication bus 704 completes mutual communication,

Memory 703, used to store computer programs;

When the processor 701 is used to execute the program stored on the memory 703, the following steps are implemented:

Acquiring the target time-domain signal sent by the sending end, wherein the target time-domain signal is a first number of the same first number of first signals to be transmitted by the sending end according to the preset correspondence between the phase information sequence and the sideband information sequence. The time-domain signal with the smallest peak-to-average ratio obtained after processing the frequency-domain signal;

performing fast Fourier transform on the target time domain signal to obtain a fourth frequency domain signal corresponding to the target time domain signal;

determining a target sideband information sequence corresponding to the fourth frequency domain signal according to amplitudes of multiple complex signals contained in the fourth frequency domain signal;

A target phase information sequence corresponding to the target sideband information sequence is determined according to a preset correspondence between the phase information sequence and the sideband information sequence.

The communication bus mentioned in the above electronic device may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus or the like. The communication bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or one type of bus.

The communication interface is used for communication between the electronic device and other devices.

The memory may include a random access memory (Random Access Memory, RAM), and may also include a non-volatile memory (Non-Volatile Memory, NVM), such as at least one disk memory. Optionally, the memory may also be at least one storage device located far away from the aforementioned processor.

Above-mentioned processor can be general-purpose processor, comprises central processing unit (Central Processing Unit, CPU), network processor (Network Processor, NP) etc.; Can also be Digital Signal Processor (Digital Signal Processing, DSP), ASIC (Application Specific Integrated Circuit, ASIC), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

In yet another embodiment provided by the present invention, a computer-readable storage medium is also provided, and a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, any of the above-mentioned OFDM applications is implemented. The steps of the signal processing method at the sending end in the system.

In yet another embodiment provided by the present invention, a computer-readable storage medium is also provided, and a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, any of the above-mentioned OFDM applications is implemented. The steps of the signal processing method at the receiving end in the system.

In yet another embodiment provided by the present invention, a computer program product containing instructions is also provided, and when it is run on a computer, it causes the computer to execute the steps of any of the above-mentioned signal processing methods applied to the transmitting end in the OFDM system .

In yet another embodiment provided by the present invention, a computer program product containing instructions is also provided, and when it is run on a computer, it causes the computer to execute the steps of any one of the above-mentioned signal processing methods applied to the receiver in the OFDM system .

In the above embodiments, all or part of them may be implemented by software, hardware, firmware or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present invention will be generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server, or data center by wired (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media. The available medium may be a magnetic medium (for example, a floppy disk, a hard disk, or a magnetic tape), an optical medium (for example, DVD), or a semiconductor medium (for example, a Solid State Disk (SSD)).

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

Each embodiment in this specification is described in a related manner, the same and similar parts of each embodiment can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for devices, electronic equipment, computer-readable storage media, and computer program products, since they are basically similar to the method embodiments, the description is relatively simple, and for relevant parts, please refer to part of the description of the method embodiments.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Claims (10)

1. A signal processing method, characterized in that, the method is applied to a transmitting end in an Orthogonal Frequency Division Multiplexing OFDM system, and a receiving end is also included in the OFDM system, and the method comprises: Copying the frequency domain signal corresponding to the signal to be transmitted to obtain a first number of identical first frequency domain signals, wherein each first frequency domain signal includes multiple complex signals; For each first frequency domain signal, multiply the first frequency domain signal by the corresponding phase information sequence to obtain a second frequency domain signal corresponding to the first frequency domain signal; According to the preset correspondence between the phase information sequence and the sideband information sequence, determine the sideband information sequence corresponding to the phase information sequence corresponding to the first frequency domain signal as the first sideband information sequence, wherein the sideband information sequence The information sequence is used to adjust the amplitude of the complex signal contained in the frequency domain signal; adjusting the amplitudes of multiple complex signals included in the second frequency domain signal corresponding to the first frequency domain signal according to the first sideband information sequence to obtain a corresponding third frequency domain signal; performing inverse fast Fourier transform on the obtained first number of third frequency domain signals respectively to obtain the first number of time domain signals; Sending the time-domain signal with the smallest peak-to-average ratio among the first number of time-domain signals to the receiving end, and using the time-domain signal with the smallest peak-to-average ratio as the target time-domain signal, so that the receiving end The amplitudes of multiple complex signals contained in the frequency domain signal corresponding to the time domain signal and the corresponding relationship between the phase information sequence and the sideband information sequence determine the phase information sequence corresponding to the target time domain signal. 2. The method according to claim 1, wherein a plurality of binary values are included in the first sideband information sequence, and the plurality of binary values are related to the complex signal contained in the second frequency domain signal one-to-one correspondence; According to the first sideband information sequence, adjusting the amplitudes of multiple complex signals included in the second frequency domain signal corresponding to the first frequency domain signal to obtain a corresponding third frequency domain signal, including: Adjust the amplitude of the first complex signal contained in the second frequency domain signal according to a first preset formula, wherein the first complex signal is the first sideband in the second frequency domain signal For the complex signal corresponding to the binary value 1 contained in the information sequence, the first preset formula is: X represents the first complex signal, X' represents a complex signal obtained by adjusting the amplitude of the first complex signal, and E represents a first preset value. 3. A signal processing method, characterized in that, the method is applied to a receiving end in an OFDM system, and a sending end is also included in the OFDM system, and the method includes: Acquiring the target time-domain signal sent by the sending end, wherein the target time-domain signal is a first number of the same first number of first signals to be transmitted by the sending end according to the preset correspondence between the phase information sequence and the sideband information sequence. The time-domain signal with the smallest peak-to-average ratio obtained after processing the frequency-domain signal; performing fast Fourier transform on the target time domain signal to obtain a fourth frequency domain signal corresponding to the target time domain signal; determining a target sideband information sequence corresponding to the fourth frequency domain signal according to amplitudes of multiple complex signals contained in the fourth frequency domain signal; A target phase information sequence corresponding to the target sideband information sequence is determined according to a preset correspondence between the phase information sequence and the sideband information sequence. 4. The method according to claim 3, wherein the target sideband corresponding to the fourth frequency domain signal is determined according to the amplitudes of a plurality of complex signals contained in the fourth frequency domain signal Information sequence, including: For each complex signal included in the fourth frequency domain signal, determine whether the amplitude of the complex signal is greater than a second preset value; If the amplitude of the complex signal is greater than the second preset value, then use 1 as the binary value corresponding to the complex signal in the second sideband information sequence; If the amplitude of the complex signal is not greater than the second preset value, then use 0 as the binary value corresponding to the complex signal in the second sideband information sequence, wherein the second preset value is based on the second preset value Determined by two preset formulas, the second preset formula is: m represents the second preset value, P represents the amplitude of the complex signal before adjustment, and E represents the first preset value; Determine a target sideband information sequence corresponding to the fourth frequency domain signal according to the second sideband information sequence. 5. The method according to claim 4, wherein said determining the target sideband information sequence corresponding to the fourth frequency domain signal according to the second sideband information sequence comprises: According to a third preset formula, determine the similarity between the second sideband information sequence and multiple preset sideband information sequences, wherein the third preset formula is: D represents the similarity between the second side information sequence and a preset side information sequence, S _n represents the binary value contained in the preset side information sequence, and N represents that the second side information sequence contains The number of binary values of , S' _n represents the binary values contained in the second sideband information sequence; Determine the target sideband information corresponding to the fourth frequency domain signal according to the candidate sideband information sequence having the greatest similarity with the second sideband information sequence among the plurality of preset sideband information sequences sequence. 6. The method according to claim 5, wherein, among the plurality of preset sideband information sequences, the candidate sideband information sequence having the greatest similarity with the second sideband information sequence , determining a target sideband information sequence corresponding to the fourth frequency domain signal, including: When there are multiple candidate sideband information sequences, for each candidate sideband information sequence, according to the binary value contained in the candidate sideband information sequence, generate the corresponding candidate sideband information sequence alternative signal; According to a fourth preset formula, the energy difference between the fourth frequency domain signal and the candidate signal corresponding to the candidate sideband information sequence is determined, wherein the fourth preset formula is: K represents the energy difference between the fourth frequency domain signal and the candidate signal corresponding to the candidate sideband information sequence, Y _n represents the amplitude of the complex signal contained in the fourth frequency domain signal, and Z _n represents The amplitude of the complex signal contained in the candidate signal corresponding to the candidate sideband information sequence, N represents the total number of complex signals contained in the fourth frequency domain signal; A candidate sideband information sequence corresponding to a candidate signal having the smallest energy difference with the fourth frequency domain signal is used as a target sideband information sequence corresponding to the fourth frequency domain signal. 7. The method according to claim 3, characterized in that, determining the target phase information sequence corresponding to the target sideband information sequence according to the preset correspondence between the phase information sequence and the sideband information sequence Afterwards, the method also includes: The amplitude of the second complex signal contained in the fourth frequency domain signal is adjusted according to the fifth preset formula to obtain a fifth frequency domain signal, wherein the second complex signal is the fourth frequency domain signal For the complex signal corresponding to the binary value 1 contained in the target sideband information sequence, the fifth preset formula is: Y represents the second complex signal, Y' represents a complex signal obtained by adjusting the amplitude of the second complex signal, and E represents a first preset value; multiplying the target phase information sequence by the fifth frequency domain signal to obtain a sixth frequency domain signal corresponding to the fifth frequency domain signal; and performing decoding processing on the sixth frequency domain signal to obtain a signal to be transmitted sent by the sending end. 8. A signal processing device, characterized in that, the device is applied to a transmitting end in an OFDM system, and a receiving end is also included in the OFDM system, and the device includes: The copy module is used to copy the frequency domain signal corresponding to the signal to be transmitted to obtain a first number of identical first frequency domain signals, wherein each first frequency domain signal includes multiple complex signals; The first processing module is configured to, for each first frequency domain signal, multiply the first frequency domain signal by a corresponding phase information sequence to obtain a second frequency domain signal corresponding to the first frequency domain signal; The matching module is configured to determine a sideband information sequence corresponding to the phase information sequence corresponding to the first frequency domain signal as the first sideband information sequence according to the preset correspondence between the phase information sequence and the sideband information sequence, Wherein, the sideband information sequence is used to adjust the amplitude of the complex signal contained in the frequency domain signal; An amplitude modulation module, configured to adjust the amplitudes of multiple complex signals included in the second frequency domain signal corresponding to the first frequency domain signal according to the first sideband information sequence, to obtain a corresponding third frequency domain signal; The second processing module is configured to respectively perform inverse fast Fourier transform on the obtained first number of third frequency domain signals to obtain the first number of time domain signals; A sending module, configured to send the time-domain signal with the smallest peak-to-average ratio among the first number of time-domain signals to the receiving end, and use the time-domain signal with the smallest peak-to-average ratio as the target time-domain signal, so that the receiving end The terminal determines the phase information sequence corresponding to the target time domain signal according to the amplitudes of multiple complex signals contained in the frequency domain signal corresponding to the target time domain signal and the corresponding relationship between the phase information sequence and the sideband information sequence . 9. A signal processing device, characterized in that, the device is applied to a receiving end in an OFDM system, and the OFDM system also includes a sending end, and the device includes: An acquisition module, configured to acquire a target time-domain signal sent by the sending end, wherein the target time-domain signal is the first quantity to be transmitted by the sending end according to the preset correspondence between the phase information sequence and the sideband information sequence A time-domain signal with the smallest peak-to-average ratio obtained after processing the same first frequency-domain signal; A first processing module, configured to perform fast Fourier transform on the target time domain signal to obtain a fourth frequency domain signal corresponding to the target time domain signal; A determining module, configured to determine a target sideband information sequence corresponding to the fourth frequency domain signal according to the amplitudes of multiple complex signals contained in the fourth frequency domain signal; The matching module is configured to determine the target phase information sequence corresponding to the target sideband information sequence according to the preset correspondence between the phase information sequence and the sideband information sequence. 10. An electronic device, characterized in that it comprises a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory complete mutual communication through the communication bus; memory for storing computer programs; When the processor is used to execute the program stored in the memory, it realizes the method steps in any one of claims 1-2, or any one of claims 3-7.