阅读说明：本技术 信号的调制方法、解调方法、装置、设备和系统 (Signal modulation method, demodulation method, device, equipment and system ) 是由 潘权 范达熠 姜培 祁楠 于洪宇 陈勇 汪青 于 2019-10-23 设计创作，主要内容包括：本申请涉及一种信号的调制方法、解调方法、装置、设备和系统。该方法包括：对输入的基带信号进行分频,得到多个子基带信号,其中,不同的子基带信号在频谱上所占用的频带不同；针对每个子基带信号,采用与当前子基带信号对应的调制方式对所述当前子基带信号进行调制,得到对应的子已调制信号,其中,所述多个子基带信号中至少有两个子基带信号对应的调制方式不相同；对多个子已调制信号进行整合,得到已调制信号,并发送所述已调制信号。该方法提高了数据的传输速率。(The application relates to a signal modulation method, a signal demodulation device and a signal demodulation system. The method comprises the following steps: dividing the frequency of an input baseband signal to obtain a plurality of sub-baseband signals, wherein the frequency bands occupied by different sub-baseband signals on a frequency spectrum are different; for each sub-baseband signal, modulating the current sub-baseband signal by adopting a modulation mode corresponding to the current sub-baseband signal to obtain a corresponding sub-modulated signal, wherein the modulation modes corresponding to at least two sub-baseband signals in the plurality of sub-baseband signals are different; and integrating the plurality of sub-modulated signals to obtain a modulated signal, and transmitting the modulated signal. The method improves the transmission rate of data.)

1. A method for modulating a signal, comprising:

dividing the frequency of an input baseband signal to obtain a plurality of sub-baseband signals, wherein the frequency bands occupied by different sub-baseband signals on a frequency spectrum are different;

for each sub-baseband signal, modulating the current sub-baseband signal by adopting a modulation mode corresponding to the current sub-baseband signal to obtain a corresponding sub-modulated signal, wherein the modulation modes corresponding to at least two sub-baseband signals in the plurality of sub-baseband signals are different;

and integrating the plurality of sub-modulated signals to obtain a modulated signal, and transmitting the modulated signal.

2. The method of claim 1, wherein the frequency dividing the input baseband signal to obtain a plurality of sub-baseband signals comprises:

acquiring a power interval of an input baseband signal according to a spectrogram of the baseband signal;

dividing the power interval into a plurality of sub-power intervals;

respectively determining a frequency band corresponding to each sub-power interval based on the spectrogram to obtain a plurality of divided frequency bands;

and dividing the baseband signal according to the plurality of divided frequency bands to obtain a plurality of sub-baseband signals.

3. The method of claim 2, wherein the modulating the current sub-baseband signal in a modulation mode corresponding to the current sub-baseband signal comprises:

and determining a corresponding modulation mode according to the characteristics of the frequency band corresponding to the current sub-baseband signal, and modulating the current sub-baseband signal according to the modulation mode.

4. A method for demodulating a signal, comprising:

receiving a modulated signal;

splitting the modulated signal to obtain a plurality of sub-modulated signals, wherein different sub-modulated signals occupy different frequency bands on a frequency spectrum;

for each sub-modulated signal, demodulating the current sub-modulated signal by adopting a demodulation mode corresponding to the current sub-modulated signal to obtain a corresponding sub-baseband signal, wherein the demodulation modes corresponding to at least two sub-modulated signals in the plurality of sub-modulated signals are different;

and integrating the plurality of sub-baseband signals to obtain a baseband signal.

5. The method of claim 4, wherein demodulating the current sub-modulated signal in a demodulation manner corresponding to the current sub-modulated signal to obtain a corresponding sub-baseband signal comprises:

acquiring a frequency band corresponding to the current sub-modulated signal;

determining a demodulation mode corresponding to the current sub-modulated signal according to the frequency band and a preset demodulation mapping relation, wherein the demodulation mapping relation comprises a mapping relation between the frequency band and a demodulation mode, and the demodulation mode is matched with a modulation mode adopted by a signal sending end on the frequency band;

and demodulating the current sub-modulated signal according to the demodulation mode.

6. An apparatus for modulating a signal, comprising:

the frequency division module is used for carrying out frequency division on the input baseband signal to obtain a plurality of sub-baseband signals, wherein different sub-baseband signals occupy different frequency bands on a frequency spectrum;

the modulation module is used for modulating the current sub-baseband signal by adopting a modulation mode corresponding to the current sub-baseband signal aiming at each sub-baseband signal to obtain a corresponding sub-modulated signal, wherein the modulation modes corresponding to at least two sub-baseband signals in the plurality of sub-baseband signals are different;

an integration module for integrating the plurality of sub-modulated signals to obtain a modulated signal;

a transmitting module for transmitting the modulated signal.

7. An apparatus for demodulating a signal, comprising:

a receiving module for receiving a modulated signal;

the splitting module is used for splitting the modulated signals to obtain a plurality of sub modulated signals, wherein different sub modulated signals occupy different frequency bands on a frequency spectrum;

a demodulation module, configured to demodulate, for each sub-modulated signal, a current sub-modulated signal in a demodulation manner corresponding to the current sub-modulated signal to obtain a corresponding sub-baseband signal, where at least two sub-modulated signals in the plurality of sub-modulated signals have different demodulation manners;

and the integration module is used for integrating the multiple sub-baseband signals to obtain the baseband signals.

8. A signal transmission apparatus comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the method of any one of claims 1 to 3.

9. A signal receiving device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor realizes the steps of the method of any of claims 4 or 5 when executing the computer program.

10. A signal processing system comprising the signal transmission apparatus according to claim 8 and the signal reception apparatus according to claim 9.

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method, an apparatus, a device, and a system for modulating and demodulating a signal.

Background

In the signal transmission process, in order to reduce the loss during transmission and facilitate signal transmission, a baseband signal to be transmitted needs to be modulated. Signal modulation is to use baseband signal to control a carrier signal, so that some parameter (amplitude, frequency, phase, pulse width, etc.) of the latter is changed according to the former value. Wherein the carrier signal is typically a high frequency sinusoidal signal. However, the conventional signal modulation method often cannot achieve the required data transmission rate.

Disclosure of Invention

Based on this, it is necessary to provide a signal modulation method, a signal demodulation device, and a signal demodulation system, aiming at the technical problem that the conventional signal modulation method often fails to achieve the required data transmission rate.

A method of modulating a signal, comprising:

dividing the frequency of an input baseband signal to obtain a plurality of sub-baseband signals, wherein the frequency bands occupied by different sub-baseband signals on a frequency spectrum are different;

for each sub-baseband signal, modulating the current sub-baseband signal by adopting a modulation mode corresponding to the current sub-baseband signal to obtain a corresponding sub-modulated signal, wherein the modulation modes corresponding to at least two sub-baseband signals in the plurality of sub-baseband signals are different;

and integrating the plurality of sub-modulated signals to obtain a modulated signal, and transmitting the modulated signal.

A method of demodulating a signal, comprising:

receiving a modulated signal;

splitting the modulated signal to obtain a plurality of sub-modulated signals, wherein different sub-modulated signals occupy different frequency bands on a frequency spectrum;

for each sub-modulated signal, demodulating the current sub-modulated signal by adopting a demodulation mode corresponding to the current sub-modulated signal to obtain a corresponding sub-baseband signal, wherein the demodulation modes corresponding to at least two sub-modulated signals in the plurality of sub-modulated signals are different;

and integrating the plurality of sub-baseband signals to obtain a baseband signal.

An apparatus for modulating a signal, comprising:

the frequency division module is used for carrying out frequency division on the input baseband signal to obtain a plurality of sub-baseband signals, wherein different sub-baseband signals occupy different frequency bands on a frequency spectrum;

the modulation module is used for modulating the current sub-baseband signal by adopting a modulation mode corresponding to the current sub-baseband signal aiming at each sub-baseband signal to obtain a corresponding sub-modulated signal, wherein the modulation modes corresponding to at least two sub-baseband signals in the plurality of sub-baseband signals are different;

an integration module for integrating the plurality of sub-modulated signals to obtain a modulated signal;

a transmitting module for transmitting the modulated signal.

An apparatus for demodulating a signal, comprising:

a receiving module for receiving a modulated signal;

the splitting module is used for splitting the modulated signals to obtain a plurality of sub modulated signals, wherein different sub modulated signals occupy different frequency bands on a frequency spectrum;

a demodulation module, configured to demodulate, for each sub-modulated signal, a current sub-modulated signal in a demodulation manner corresponding to the current sub-modulated signal to obtain a corresponding sub-baseband signal, where at least two sub-modulated signals in the plurality of sub-modulated signals have different demodulation manners;

and the integration module is used for integrating the multiple sub-baseband signals to obtain the baseband signals.

A signal transmitting apparatus comprising a memory and a processor, the memory storing a computer program, the processor implementing the following steps when executing the computer program:

dividing the frequency of an input baseband signal to obtain a plurality of sub-baseband signals, wherein the frequency bands occupied by different sub-baseband signals on a frequency spectrum are different;

for each sub-baseband signal, modulating the current sub-baseband signal by adopting a modulation mode corresponding to the current sub-baseband signal to obtain a corresponding sub-modulated signal, wherein the modulation modes corresponding to at least two sub-baseband signals in the plurality of sub-baseband signals are different;

and integrating the plurality of sub-modulated signals to obtain a modulated signal, and transmitting the modulated signal.

A signal receiving apparatus comprising a memory and a processor, the memory storing a computer program, the processor implementing the following steps when executing the computer program:

receiving a modulated signal;

splitting the modulated signal to obtain a plurality of sub-modulated signals, wherein different sub-modulated signals occupy different frequency bands on a frequency spectrum;

for each sub-modulated signal, demodulating the current sub-modulated signal by adopting a demodulation mode corresponding to the current sub-modulated signal to obtain a corresponding sub-baseband signal, wherein the demodulation modes corresponding to at least two sub-modulated signals in the plurality of sub-modulated signals are different;

and integrating the plurality of sub-baseband signals to obtain a baseband signal.

A signal processing system comprising a signal transmitting apparatus as described in the above embodiments and a signal receiving apparatus as described in the above embodiments.

According to the signal modulation method, the signal demodulation device, the signal demodulation equipment and the signal modulation system, an input baseband signal is subjected to frequency division to obtain a plurality of sub-baseband signals, each sub-baseband signal is modulated by adopting a modulation mode corresponding to the current sub-baseband signal to obtain a corresponding sub-modulated signal, the plurality of sub-modulated signals are integrated to obtain a modulated signal, and the modulated signal is sent. In the process of modulating the baseband signal, the baseband signal is subjected to frequency division processing, and the modulation modes corresponding to at least two sub-band signals in the multiple sub-band signals obtained after the frequency division processing are different, so that the modulation mode matched with the frequency band of the sub-band signals is adopted for at least two sub-band signals in the multiple sub-band signals, and compared with the situation that the full frequency band of the baseband signal is modulated by adopting the same modulation mode, the data transmission rate is improved.

Drawings

FIG. 1 is a schematic diagram of a system architecture for use in an embodiment of the present application;

fig. 2 is a schematic flowchart of a signal modulation method according to an embodiment;

fig. 3 is a schematic flowchart of a signal modulation method according to another embodiment;

FIG. 4 is a spectrum diagram of a baseband signal according to an embodiment;

fig. 5 is a flowchart illustrating a signal demodulation method according to an embodiment;

fig. 6 is a schematic diagram of an internal structure of a signal modulation apparatus according to an embodiment;

fig. 7 is a schematic diagram of an internal structure of a signal demodulation apparatus according to an embodiment;

fig. 8 is a schematic internal structural diagram of a computer device according to an embodiment.

Detailed Description

The signal modulation method provided by the embodiment of the present application may be applied to a system as shown in fig. 1, where the system may include a signal sending device 10 and a signal receiving device 20, where the signal sending device 10 performs modulation processing on a baseband signal to obtain a modulated signal, and sends the modulated signal to the signal receiving device 20, and the signal receiving device 20 performs demodulation processing on the received modulated signal to recover the baseband signal.

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions in the embodiments of the present application are further described in detail by the following embodiments in combination with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

In the following, the execution subject is taken as an example to be introduced, specifically:

fig. 2 is a schematic flow diagram of a signal modulation method provided in an embodiment, where the embodiment relates to a specific process of how a signal sending device modulates a baseband signal, and as shown in fig. 2, the method includes:

s101, frequency division is carried out on the input baseband signal to obtain a plurality of sub-baseband signals.

Specifically, the baseband signal may be a digital baseband signal, or may also be an analog baseband signal. After obtaining the baseband signal, the signal transmitting device performs frequency band division on a total frequency band occupied by the baseband signal on a frequency spectrum, so as to divide the total frequency band into a plurality of frequency bands, then performs frequency division on the baseband signal based on the plurality of divided frequency bands, so as to obtain a plurality of sub-baseband signals, wherein the frequency bands occupied by different sub-baseband signals on the frequency spectrum are different. The signal transmitting device may divide the total frequency band at equal intervals, may also divide the total frequency band at unequal intervals, and may also divide the total frequency band according to the fading condition of the signal, which is not limited in this embodiment.

Illustratively, the total frequency band (i.e., frequency range) of the input baseband signal is 0-f2, the signal transmission device may divide the total frequency band into 3 frequency bands according to how fast the baseband signal fades, where 0-f0 is a first frequency band, f0-f1 is a second frequency band, and f1-f2 is a third frequency band, where the baseband signal fades faster and faster in the first frequency band, the second frequency band, and the third frequency band. Then, based on the above-mentioned 3 frequency bands, the baseband signal is divided into 3 sub-baseband signals, and the frequency bands occupied by the 3 sub-baseband signals on the frequency spectrum are the first frequency band, the second frequency band and the third frequency band, respectively.

S102, aiming at each sub-baseband signal, modulating the current sub-baseband signal by adopting a modulation mode corresponding to the current sub-baseband signal to obtain a corresponding sub-modulated signal, wherein the modulation modes corresponding to at least two sub-baseband signals in the plurality of sub-baseband signals are different.

Specifically, the current sub-band signal is any one of a plurality of sub-band signals. Each current baseband signal corresponds to a Modulation mode, which may be any one of Non-Return to Zero (NRZ), Quadrature Amplitude Modulation (QAM), pulse Amplitude Modulation (PAM 4), Orthogonal Frequency Division Multiplexing (OFDM), dual Binary code (Duo-Binary), and Gaussian Minimum Shift Keying (GMSK). The signal transmitting device performs modulation processing on the multiple sub-baseband signals obtained after frequency division, in the modulation process, different modulation modes may be respectively adopted for different sub-baseband signals, or a part of the sub-baseband signals may adopt the same modulation mode, and a part of the sub-baseband signals adopt different modulation modes.

Continuing with the example in S101, taking different sub-baseband signals and respectively adopting different modulation schemes as an example, the signal transmitting apparatus may modulate the sub-baseband signal occupying the first frequency band by using a QAM modulation scheme to obtain a first modulated signal, may modulate the sub-baseband signal occupying the second frequency band by using a PAM4 modulation scheme to obtain a second modulated signal, and may modulate the sub-baseband signal occupying the third frequency band by using an NRZ modulation scheme to obtain a third modulated signal. Of course, the signal sending device may also use other different modulation methods to respectively modulate the sub-baseband signal occupying the first frequency band, the sub-baseband signal occupying the second frequency band, and the sub-baseband signal occupying the third frequency band, which is not limited in this embodiment. In one embodiment, assuming that the total frequency band (i.e., frequency range) of the input baseband signal is 0-f3, the signal transmission apparatus may also divide the total frequency band of the baseband signal into 4 frequency bands, 0-f0 being a first frequency band, f0-f1 being a second frequency band, f1-f2 being a third frequency band, and f2-f3 being a fourth frequency band, wherein the baseband signal fades faster and faster in the first frequency band, the second frequency band, the third frequency band, and the fourth frequency band. Then, based on the 4 frequency bands, the baseband signals are divided into 4 sub-baseband signals, the signal transmitting device may modulate the sub-baseband signals occupying the first frequency band by using a QAM or OFDM modulation scheme, modulate the sub-baseband signals occupying the second frequency band by using a PAM4 or GMSK modulation scheme, modulate the sub-baseband signals occupying the third frequency band by using a Duo-Binary modulation scheme, and modulate the sub-baseband signals occupying the fourth frequency band by using an NRZ or PAM4 modulation scheme.

In practical applications, different frequency ranges have different characteristics, for example, the low frequency characteristics may be: the signal changes slowly and the waveform is smooth, and the high frequency characteristics can be: in order to fully utilize the advantages of different modulation schemes and further increase the transmission rate of data, on the basis of the above embodiment, optionally, S102 may be: the signal transmitting device may determine a corresponding modulation scheme according to a characteristic of a frequency band corresponding to the current sub-baseband signal, and modulate the current sub-baseband signal according to the modulation scheme.

S103, integrating the plurality of sub-modulated signals to obtain modulated signals, and sending the modulated signals.

After the signal sending equipment modulates the sub-baseband signal, the sub-modulated signal is moved relative to the frequency spectrum of the sub-baseband signal, so that the signal sending equipment can integrate the plurality of sub-modulated signals according to the frequency band occupied by the sub-modulated signals on the frequency spectrum and the sequence from low to high according to the frequency band of the sub-modulated signals, and the modulated signals are obtained.

According to the signal modulation method provided by the embodiment of the application, an input baseband signal is subjected to frequency division to obtain a plurality of sub-baseband signals, each sub-baseband signal is modulated by adopting a modulation mode corresponding to the current sub-baseband signal to obtain a corresponding sub-modulated signal, the plurality of sub-modulated signals are integrated to obtain a modulated signal, and the modulated signal is sent. In the process of modulating the baseband signal, the baseband signal is subjected to frequency division processing, and the modulation modes corresponding to at least two sub-band signals in the multiple sub-band signals obtained after the frequency division processing are different, so that the modulation mode matched with the frequency band of the sub-band signals is adopted for at least two sub-band signals in the multiple sub-band signals, and compared with the situation that the full frequency band of the baseband signal is modulated by adopting the same modulation mode, the data transmission rate is improved.

Fig. 3 is a schematic flowchart of a signal modulation method according to another embodiment. The present embodiment relates to a specific process of how the signal transmission apparatus divides the frequency of the baseband signal. On the basis of the foregoing embodiment, optionally, as shown in fig. 3, the foregoing S101 may include:

s201, acquiring a power interval of the baseband signal according to a spectrogram of the input baseband signal.

The spectrogram is used for representing the variation distribution of the power of the baseband signal along with the frequency.

S202, carrying out interval division on the power interval to obtain a plurality of sub-power intervals.

The power interval may be divided according to the attenuation amount of the power. In this case, the signal transmission device stores a preset power attenuation amount, and the signal transmission device divides the power interval based on the power attenuation amount, which may be a fixed attenuation amount or a plurality of different attenuation amounts.

And S203, respectively determining a frequency band corresponding to each sub-power interval based on the spectrogram to obtain a plurality of divided frequency bands.

And S204, frequency division is carried out on the baseband signals according to the plurality of divided frequency bands to obtain a plurality of sub-baseband signals.

Assuming that the spectrogram of the input baseband signal is shown in fig. 4 (the abscissa in fig. 4 represents frequency in Hz, and the ordinate represents power in dB, where the power is logarithmically calculated, and therefore in dB), the power interval of the baseband signal is 0dB to 10dB, which can be obtained from fig. 4. The signal transmission device may divide a power interval (0dB-10dB) into 3 sub-power intervals, where the 3 sub-power intervals are: 10dB, 10dB-5dB and 5dB-0 dB. Then, respectively determining that the frequency band corresponding to 10dB is 0-f0, the frequency band corresponding to 10dB-5dB is f0-f1, and the frequency band corresponding to 5dB-0dB is f1-f2 based on the spectrogram. And then frequency division is carried out on the baseband signals based on the obtained divided frequency bands 0-f0, the divided frequency bands f0-f1 and the divided frequency bands f1-f2, and 3 sub baseband signals are obtained. The frequency bands occupied by the 3 sub baseband signals are respectively 0-f0, f0-f1 and f1-f 2.

In this embodiment, because the spectrogram of the baseband signal contains information about the change of the power of the baseband signal with frequency, the signal transmitting apparatus divides the frequency of the baseband signal based on the spectrogram of the baseband signal, so that the accuracy of the frequency division result is higher, and therefore, based on the frequency division result with higher accuracy, the sub-baseband signal can be modulated by using a modulation method more matched with the frequency division result, and the transmission rate of data is further improved.

In the following, the execution subject is taken as a signal receiving device for example, specifically:

fig. 5 is a flowchart illustrating a signal demodulation method according to an embodiment. The present embodiment relates to a specific process of how a signal receiving device demodulates a received signal, and as shown in fig. 5, the method may include:

s301, receiving a modulated signal.

S302, splitting the modulated signal to obtain a plurality of sub-modulated signals, where different sub-modulated signals occupy different frequency bands on a frequency spectrum.

The signal transmitting apparatus and the signal receiving apparatus negotiate in advance on the manner of integrating the plurality of sub-baseband signals (i.e., the manner of splitting the modulated signals), and thus the signal receiving apparatus can split the modulated signals with reference to the manner of integrating the plurality of sub-baseband signals by the signal transmitting apparatus.

S303, for each sub-modulated signal, demodulating the current sub-modulated signal by using a demodulation method corresponding to the current sub-modulated signal to obtain a corresponding sub-baseband signal, where at least two sub-modulated signals in the plurality of sub-modulated signals have different demodulation methods.

Specifically, the current sub-modulated signal is any one of a plurality of sub-modulated signals. Each current sub-modulated signal corresponds to a demodulation mode, and the demodulation mode may be any one of NRZ, QAM, PAM4, OFDM, Duo-Binary, GMSK, and the like. The signal receiving device demodulates the plurality of sub-modulated signals obtained after splitting, and in the demodulation process, different demodulation manners may be respectively adopted for different sub-modulated signals, or a part of the sub-modulated signals may adopt the same demodulation manner, and a part of the sub-modulated signals adopt different demodulation manners.

In one embodiment, the process of S303 may be: acquiring a frequency band corresponding to the current sub-modulated signal; and determining a demodulation mode corresponding to the current sub-modulated signal according to the frequency band and a preset demodulation mapping relation, and demodulating the current sub-modulated signal according to the demodulation mode. The demodulation mapping relation comprises a mapping relation between a frequency band and a demodulation mode, and the demodulation mode is matched with a modulation mode adopted by a signal sending end on the frequency band.

The signal transmitting device and the signal receiving device negotiate the modulation mode of the sub-baseband signal (i.e., the demodulation mode of the sub-modulated signal) in advance, that is, the modulation mode adopted by the signal transmitting device on the sub-baseband signal on a certain frequency band is matched with the demodulation mode adopted by the signal receiving device on the sub-modulated signal on the frequency band.

And S304, integrating the multiple sub-baseband signals to obtain the baseband signals.

After the signal receiving device demodulates the sub-modulated signal, the sub-baseband signal is shifted relative to the frequency spectrum of the sub-modulated signal, so that the signal receiving device can integrate the multiple sub-baseband signals according to the frequency band occupied by the sub-baseband signal on the frequency spectrum and the sequence from low to high according to the frequency band of the sub-baseband signal, and the baseband signal is obtained.

The signal demodulation method provided by the embodiment of the application splits a received modulated signal to obtain a plurality of sub-modulated signals, demodulates a current sub-modulated signal by adopting a demodulation mode corresponding to the current sub-modulated signal for each sub-modulated signal to obtain a corresponding sub-baseband signal, and integrates the plurality of sub-baseband signals to obtain the baseband signal. In the process of demodulating the modulated signals, the modulated signals are split, and the demodulation modes corresponding to at least two sub-modulated signals in the plurality of sub-modulated signals obtained after the split processing are different, so that the demodulation mode matched with the frequency bands of the sub-modulated signals is adopted for at least two sub-modulated signals in the plurality of sub-modulated signals, and compared with the mode that the modulated signals are demodulated in the same demodulation mode in the full frequency bands, the data transmission rate is improved.

It should be understood that, although the steps in the flowcharts of fig. 2 to 5 are shown in sequence as indicated by the arrows, the steps are not necessarily performed in sequence as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 2-5 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performing the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternately with other steps or at least some of the sub-steps or stages of other steps.

Fig. 6 is a schematic diagram of an internal structure of a modulation apparatus for a signal according to an embodiment, and as shown in fig. 6, the modulation apparatus may include: frequency division module 20, modulation module 21, integration module 22 and transmission module 23.

Specifically, the frequency dividing module 20 is configured to frequency-divide an input baseband signal to obtain a plurality of sub-baseband signals, where different sub-baseband signals occupy different frequency bands on a frequency spectrum;

the modulation module 21 is configured to modulate, for each sub-baseband signal, the current sub-baseband signal in a modulation manner corresponding to the current sub-baseband signal to obtain a corresponding sub-modulated signal, where at least two sub-baseband signals in the plurality of sub-baseband signals have different modulation manners;

the integration module 22 is configured to integrate the plurality of sub-modulated signals to obtain a modulated signal;

the transmitting module 23 is configured to transmit the modulated signal.

The signal modulation apparatus according to the embodiment of the present application divides an input baseband signal to obtain a plurality of sub-baseband signals, modulates a current sub-baseband signal in a modulation scheme corresponding to the current sub-baseband signal to obtain a corresponding sub-modulated signal, integrates the plurality of sub-modulated signals to obtain a modulated signal, and transmits the modulated signal. In the process of modulating the baseband signal, the baseband signal is subjected to frequency division processing, and the modulation modes corresponding to at least two sub-band signals in the multiple sub-band signals obtained after the frequency division processing are different, so that the modulation mode matched with the frequency band of the sub-band signals is adopted for at least two sub-band signals in the multiple sub-band signals, and compared with the situation that the full frequency band of the baseband signal is modulated by adopting the same modulation mode, the data transmission rate is improved.

On the basis of the foregoing embodiment, optionally, the frequency division module 20 is specifically configured to obtain a power interval of the baseband signal according to a spectrogram of the input baseband signal; dividing the power interval into a plurality of sub-power intervals; respectively determining a frequency band corresponding to each sub-power interval based on the spectrogram to obtain a plurality of divided frequency bands; and dividing the baseband signal according to the plurality of divided frequency bands to obtain a plurality of sub-baseband signals.

On the basis of the foregoing embodiment, optionally, the modulation module 21 is specifically configured to determine a corresponding modulation mode according to a characteristic of a frequency band corresponding to the current sub-baseband signal, and modulate the current sub-baseband signal according to the modulation mode.

Fig. 7 is a schematic diagram of an internal structure of a signal demodulation apparatus according to an embodiment, and as shown in fig. 7, the apparatus may include: a receiving module 30, a splitting module 31, a demodulation module 32 and an integrating module 33.

Specifically, the receiving module 30 is configured to receive a modulated signal;

the splitting module 31 is configured to split the modulated signal to obtain a plurality of sub-modulated signals, where different sub-modulated signals occupy different frequency bands on a frequency spectrum;

the demodulation module 32 is configured to demodulate, for each sub-modulated signal, the current sub-modulated signal in a demodulation manner corresponding to the current sub-modulated signal to obtain a corresponding sub-baseband signal, where at least two sub-modulated signals in the plurality of sub-modulated signals have different demodulation manners;

the integrating module 33 is configured to integrate the multiple sub-baseband signals to obtain a baseband signal.

The signal demodulation apparatus provided in the embodiment of the present application splits a received modulated signal to obtain a plurality of sub-modulated signals, demodulates a current sub-modulated signal in a demodulation manner corresponding to the current sub-modulated signal for each sub-modulated signal to obtain a corresponding sub-baseband signal, and integrates the plurality of sub-baseband signals to obtain a baseband signal. In the process of demodulating the modulated signals, the modulated signals are split, and the demodulation modes corresponding to at least two sub-modulated signals in the plurality of sub-modulated signals obtained after the split processing are different, so that the demodulation mode matched with the frequency bands of the sub-modulated signals is adopted for at least two sub-modulated signals in the plurality of sub-modulated signals, and compared with the mode that the modulated signals are demodulated in the same demodulation mode in the full frequency bands, the data transmission rate is improved.

On the basis of the foregoing embodiment, optionally, the demodulation module 32 is specifically configured to acquire a frequency band corresponding to the current sub-modulated signal; and determining a demodulation mode corresponding to the current sub-modulated signal according to the frequency band and a preset demodulation mapping relation, and demodulating the current sub-modulated signal according to the demodulation mode, wherein the demodulation mapping relation comprises the mapping relation between the frequency band and the demodulation mode, and the demodulation mode is matched with the modulation mode adopted by a signal sending end on the frequency band.

In one embodiment, a computer device is provided, which may be a signal transmitting device or a signal receiving device, and its internal structure diagram may be as shown in fig. 8. The computer device includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the computer device is used for storing data in the modulation process of the signal and in the demodulation process of the signal. The network interface of the computer device is used for communicating with an external device through a network connection. The computer program is executed by a processor to implement a method of modulating a signal and a method of demodulating a signal.

Those skilled in the art will appreciate that the architecture shown in fig. 8 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.

In one embodiment, there is provided a signal transmission device comprising a memory and a processor, the memory having a computer program stored therein, the processor implementing the following steps when executing the computer program:

dividing the frequency of an input baseband signal to obtain a plurality of sub-baseband signals, wherein the frequency bands occupied by different sub-baseband signals on a frequency spectrum are different;

for each sub-baseband signal, modulating the current sub-baseband signal by adopting a modulation mode corresponding to the current sub-baseband signal to obtain a corresponding sub-modulated signal, wherein the modulation modes corresponding to at least two sub-baseband signals in the plurality of sub-baseband signals are different;

and integrating the plurality of sub-modulated signals to obtain a modulated signal, and transmitting the modulated signal.

In one embodiment, the processor, when executing the computer program, further performs the steps of: acquiring a power interval of an input baseband signal according to a spectrogram of the baseband signal; dividing the power interval into a plurality of sub-power intervals; respectively determining a frequency band corresponding to each sub-power interval based on the spectrogram to obtain a plurality of divided frequency bands; and dividing the baseband signal according to the plurality of divided frequency bands to obtain a plurality of sub-baseband signals.

In one embodiment, the processor, when executing the computer program, further performs the steps of: and determining a corresponding modulation mode according to the characteristics of the frequency band corresponding to the current sub-baseband signal, and modulating the current sub-baseband signal according to the modulation mode.

In one embodiment, there is provided a signal receiving apparatus comprising a memory and a processor, the memory having stored therein a computer program, the processor implementing the following steps when executing the computer program:

receiving a modulated signal;

splitting the modulated signal to obtain a plurality of sub-modulated signals, wherein different sub-modulated signals occupy different frequency bands on a frequency spectrum;

for each sub-modulated signal, demodulating the current sub-modulated signal by adopting a demodulation mode corresponding to the current sub-modulated signal to obtain a corresponding sub-baseband signal, wherein the demodulation modes corresponding to at least two sub-modulated signals in the plurality of sub-modulated signals are different;

and integrating the plurality of sub-baseband signals to obtain a baseband signal.

In one embodiment, the processor, when executing the computer program, further performs the steps of: acquiring a frequency band corresponding to the current sub-modulated signal; determining a demodulation mode corresponding to the current sub-modulated signal according to the frequency band and a preset demodulation mapping relation, and demodulating the current sub-modulated signal according to the demodulation mode; the demodulation mapping relation comprises a mapping relation between a frequency band and a demodulation mode, and the demodulation mode is matched with a modulation mode adopted by a signal sending end on the frequency band.

In an embodiment, there is also provided a signal processing system comprising a signal transmitting apparatus as described in any of the above embodiments and a signal receiving apparatus as described in any of the above embodiments.

The signal modulation device, the signal demodulation device and the signal modulation system provided in the above embodiments can execute the signal modulation method and the signal demodulation method provided in any embodiment of the present application, and have corresponding functional modules and beneficial effects for executing the methods. Technical details that are not described in detail in the above embodiments may be referred to a modulation method and a demodulation method of a signal provided in any embodiment of the present application.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.