CN117595935B - Signal modulation method and device - Google Patents
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Abstract
The embodiment of the specification provides a signal modulation method and device, wherein the signal modulation method comprises the following steps: acquiring an optical carrier of a laser and determining initial modulation parameters; modulating an optical carrier based on the initial modulation parameter, and determining an initial modulation signal; based on the initial modulation signal and a preset reference signal, matching is carried out, and a matching result is determined; wherein the preset reference signal is determined based on the initial modulation parameter; and adjusting the initial modulation signal based on the matching result to determine a target modulation signal. Acquiring an optical carrier of a laser and determining initial modulation parameters; modulating an optical carrier based on the initial modulation parameter, and determining an initial modulation signal; based on the initial modulation signal and a preset reference signal, matching is carried out, and a matching result is determined; wherein the preset reference signal is determined based on the initial modulation parameter; and adjusting the initial modulation signal based on the matching result to determine the target modulation signal, thereby improving the precision of signal modulation.
Description
Technical Field
The embodiment of the specification relates to the technical field of signal modulation, in particular to a signal modulation method.
Background
In a wireless communication system, the bottleneck of electronic devices not only limits the upper limit of the radio frequency generation frequency of the traditional microwave technology, but also limits the processing performance of a signal processing system on high-frequency signals. Meanwhile, laser communication has the characteristics of excellent transmission performance, large bandwidth, extremely high confidentiality and the like, and at present, optical communication is widely used in the field of wireless communication gradually, and the laser communication becomes an important mark of a new technical revolution of wireless communication.
The optical modulation scheme can be divided into two schemes, one is an internal modulation scheme and the other is an external modulation scheme. In satellite-ground laser communication, high speed, large capacity and long distance are the main requirements, so that the external modulation mode is adopted, and the external modulation has the advantages of high extinction ratio, high power, high speed and the like. For high-speed systems, mach-Zehnder interferometer-type LiNbO3 electro-optical modulators are most commonly used. The modulator adopts a Mach-Zehnder interferometer structure of a waveguide, so that not only can a high working speed be obtained, but also the extinction ratio is high. However, due to the self double-arm structure, the system is easy to deform under the influence of factors such as temperature, mechanical vibration, mechanical stretching and the like, so that the working point drifts during working, the working is unstable, the output signal is deteriorated, the performance of the system where the system is positioned is affected, and even the whole system cannot work normally. Thus, a better solution is needed.
Disclosure of Invention
In view of this, the present embodiment provides a signal modulation method. One or more embodiments of the present specification relate to a signal modulation apparatus, a computing device, a computer-readable storage medium, and a computer program that solve the technical drawbacks of the prior art.
According to a first aspect of embodiments of the present specification, there is provided a signal modulation method, including:
acquiring an optical carrier of a laser and determining initial modulation parameters;
modulating an optical carrier based on the initial modulation parameter, and determining an initial modulation signal;
based on the initial modulation signal and a preset reference signal, matching is carried out, and a matching result is determined; wherein the preset reference signal is determined based on the initial modulation parameter;
and adjusting the initial modulation signal based on the matching result to determine a target modulation signal.
In one possible implementation, modulating the optical carrier based on the initial modulation parameter, determining the initial modulation signal includes:
determining at least one target modulator based on the initial modulation parameters;
the optical carrier is passed through at least one target modulator to obtain an initial modulated signal.
In one possible implementation, determining the matching result based on matching the initial modulation signal with a preset reference signal includes:
adding disturbance signals to the initial modulation signals to determine disturbance modulation signals;
performing preset integral calculation based on the disturbance modulation signal and a preset reference signal, and determining error information;
a matching result is determined based on the error information.
In one possible implementation, the determining the error information based on the disturbance modulation signal and the preset reference signal performs a preset integration calculation, includes:
determining an integral calculation rule, and performing integral calculation based on the disturbance modulation signal, the preset reference signal and the integral calculation rule to determine a calculation result;
error information is determined based on the integration result and a reference value.
In one possible implementation, adjusting the initial modulation signal based on the matching result, determining the target modulation signal includes:
and under the condition that the matching result is not matched, adjusting the initial modulation signal to determine the target modulation signal.
In one possible implementation, the method further includes:
determining a change modulation parameter in response to the signal modulation change instruction;
the initial modulation parameters are replaced with the altered modulation parameters.
In one possible implementation, the initial modulation parameters include any one of DPSK modulation parameters, DQPSK modulation parameters, OOK modulation parameters, BPSK modulation parameters, and QPSK modulation parameters.
According to a second aspect of embodiments of the present specification, there is provided a signal modulation apparatus comprising:
the parameter determining module is configured to acquire an optical carrier of the laser and determine initial modulation parameters;
the signal modulation module is configured to modulate the optical carrier based on the initial modulation parameters and determine an initial modulation signal;
the signal matching module is configured to match the initial modulation signal with a preset reference signal and determine a matching result; wherein the preset reference signal is determined based on the initial modulation parameter;
and the signal adjustment module is configured to adjust the initial modulation based on the matching result and determine a target modulation signal.
According to a third aspect of embodiments of the present specification, there is provided a computing device comprising:
a memory and a processor;
the memory is configured to store computer-executable instructions that, when executed by the processor, perform the steps of the signal modulation method described above.
According to a fourth aspect of embodiments of the present specification, there is provided a computer readable storage medium storing computer executable instructions which, when executed by a processor, implement the steps of the signal modulation method described above.
According to a fifth aspect of embodiments of the present specification, there is provided a computer program, wherein the computer program, when executed in a computer, causes the computer to perform the steps of the signal modulation method described above.
The embodiment of the specification provides a signal modulation method and device, wherein the signal modulation method comprises the following steps: acquiring an optical carrier of a laser and determining initial modulation parameters; modulating an optical carrier based on the initial modulation parameter, and determining an initial modulation signal; based on the initial modulation signal and a preset reference signal, matching is carried out, and a matching result is determined; wherein the preset reference signal is determined based on the initial modulation parameter; and adjusting the initial modulation signal based on the matching result to determine a target modulation signal. Acquiring an optical carrier of a laser and determining initial modulation parameters; modulating an optical carrier based on the initial modulation parameter, and determining an initial modulation signal; based on the initial modulation signal and a preset reference signal, matching is carried out, and a matching result is determined; wherein the preset reference signal is determined based on the initial modulation parameter; and adjusting the initial modulation signal based on the matching result to determine the target modulation signal, thereby improving the precision of signal modulation.
Drawings
Fig. 1 is a schematic view of a signal modulation method according to an embodiment of the present disclosure;
FIG. 2 is a flow chart of a signal modulation method provided in one embodiment of the present disclosure;
fig. 3 is a schematic diagram of an apparatus for a signal modulation method according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram of modulation of a signal modulation method according to an embodiment of the present disclosure;
fig. 5 is an effect schematic diagram of a signal modulation method according to an embodiment of the present disclosure;
fig. 6a is a first overall flowchart of a signal modulation method according to one embodiment of the present disclosure;
FIG. 6b is a second overall flowchart of a signal modulation method provided by one embodiment of the present disclosure;
FIG. 6c is a third overall flowchart of a signal modulation method provided by one embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a signal modulation device according to an embodiment of the present disclosure;
FIG. 8 is a block diagram of a computing device provided in one embodiment of the present description.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present description. This description may be embodied in many other forms than described herein and similarly generalized by those skilled in the art to whom this disclosure pertains without departing from the spirit of the disclosure and, therefore, this disclosure is not limited by the specific implementations disclosed below.
The terminology used in the one or more embodiments of the specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the one or more embodiments of the specification. As used in this specification, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used in one or more embodiments of the present specification refers to and encompasses any or all possible combinations of one or more of the associated listed items.
It should be understood that, although the terms first, second, etc. may be used in one or more embodiments of this specification to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, a first may also be referred to as a second, and similarly, a second may also be referred to as a first, without departing from the scope of one or more embodiments of the present description. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "responsive to a determination", depending on the context.
In the present specification, a signal modulation method is provided, and the present specification relates to a signal modulation apparatus, a computing device, and a computer-readable storage medium, which are described in detail in the following embodiments one by one.
Referring to fig. 1, fig. 1 is a schematic diagram of a signal modulation method according to an embodiment of the present disclosure.
In the application scenario of fig. 1, the computing device 101 may acquire the optical carrier of the laser and determine the initial modulation parameters 102. The computing device 101 may then modulate the optical carrier based on the initial modulation parameters 102 to determine an initial modulation signal 103. Thereafter, the computing device 101 may determine the matching result 104 based on the initial modulation signal 103 matching with a preset reference signal. Finally, the computing device 101 may adjust the initial modulation signal based on the matching result 104 to determine a target modulation signal, as indicated by reference numeral 105.
The computing device 101 may be hardware or software. When the computing device 101 is hardware, it may be implemented as a distributed cluster of multiple servers or terminal devices, or as a single server or single terminal device. When the computing device 101 is embodied as software, it may be installed in the hardware devices listed above. It may be implemented as a plurality of software or software modules, for example, for providing distributed services, or as a single software or software module. The present invention is not particularly limited herein.
Referring to fig. 2, fig. 2 shows a flowchart of a signal modulation method according to an embodiment of the present disclosure, which specifically includes the following steps.
Step 201: the optical carrier of the laser is acquired and initial modulation parameters are determined.
In practical application, in order to solve the requirement of rapid switching of a plurality of modulation systems of satellite-to-ground laser communication at present, each working point is accurately controlled simultaneously, and control precision is high, the embodiment of the specification uses a bias point control device suitable for the plurality of modulation systems of satellite-to-ground laser communication. The device is shown in the following figure 3, and mainly comprises a laser, an IQ modulator, a modulator driver, a radio frequency switch, an optical fiber beam splitter, a bias point control module and the like.
In one possible implementation, the initial modulation parameters include any one of DPSK modulation parameters, DQPSK modulation parameters, OOK modulation parameters, BPSK modulation parameters, and QPSK modulation parameters.
For example, in the case where QPSK modulation is required, the QPSK modulation parameters may be determined. The specific modulation modes corresponding to the modulation parameters are as follows:
1)OOK：
the I-path working point is controlled to be a Quad point, the Q-path working point is controlled to be a Quad point, and the P-path working point is controlled to be a Max point.
The radio frequency switch is controlled to be OOK baseband signal
2)BPSK:
The I path of working points are controlled to be Min points, the Q path of working points are controlled to be Min points, and the P path of working points are controlled to be Quad points.
Radio frequency switch control to same BPSK baseband signal
3)QPSK:
The I path of working points are controlled to be Min points, the Q path of working points are controlled to be Min points, and the P path of working points are controlled to be Quad points.
The radio frequency switch is controlled to be different BPSK baseband signals
4)DPSK:
The I path of working points are controlled to be Min points, the Q path of working points are controlled to be Min points, and the P path of working points are controlled to be Quad points.
Radio frequency switch control to same BPSK baseband signal
5)DQPSK:
The I path of working points are controlled to be Min points, the Q path of working points are controlled to be Min points, and the P path of working points are controlled to be Quad points.
The radio frequency switch is controlled to be different BPSK baseband signals
Step 202: the optical carrier is modulated based on the initial modulation parameter, and an initial modulation signal is determined.
In one possible implementation, modulating the optical carrier based on the initial modulation parameter, determining the initial modulation signal includes: determining at least one target modulator based on the initial modulation parameters; the optical carrier is passed through at least one target modulator to obtain an initial modulated signal.
The modulator comprises an I-path modulation, a Q-path modulation and a P-path modulation.
Specifically, the QPSK signal realizes I-path modulation and Q-path modulation through two MZM modulators respectively, and then realizes the phase modulator before I, Q signalThe IQ modulator principle is shown in fig. 4, phase shifted.
Further, let the input optical signal beWherein->For the input optical signal frequency, the output signal (I and Q paths) is divided into two and sent to two MZM modulators:
wherein T is the time period of time taken for the device to be operated,for inputting optical signal energy, < >>Is Bessel expansion coefficient, ++>For the amplitude coefficient +.>Is I-path half-wave voltage, ">Is Q-path half-wave voltage, ">And->For different spectral ratio coefficients, +.>Bias voltage for I-way modulator, +.>Is Q-path half-wave voltage, ">For the phase error of the I-way modulator itself, (-)>For the instantaneous voltage value of the I-path modulation signal, < >>For I-path modulated signal, ">For Q-way modulation signal, ">Is the phase shifter phase, where P is the same. [ Hengjiang 1 ]]
Through the process ofAfter phase shifting, the output signal is:
QPSK modulation can be achieved by setting the I-and Q-way MZM modulators to the MIN point and the phase-shifting MZM modulator to the QUAD+ or QUAD-point.
Step 203: and matching the initial modulation signal with a preset reference signal, and determining a matching result. Wherein the preset reference signal is determined based on the initial modulation parameter.
In one possible implementation, determining the matching result based on matching the initial modulation signal with a preset reference signal includes: adding disturbance signals to the initial modulation signals to determine disturbance modulation signals; performing preset integral calculation based on the disturbance modulation signal and a preset reference signal, and determining error information; a matching result is determined based on the error information.
By setting the I-way and Q-way MZM modulators to the MIN point, the phase MZM modulator is set to the MIN point.
The output optical power is:
and analyzing an output optical power formula obtained by the analysis of the formula, wherein the output optical power is related to an I-path bias term, a Q-path bias term, a P-path bias term and an intersection term of the I-path and the Q-path. In order to separate out the bias voltage feedback signals of the working points of the I path, the Q path and the P path through integration of the disturbance signals, the invention adopts orthogonal disturbance signals, outputs coupling signals through sampling an IQ modulator, multiplies the coupling signals with different disturbance signals respectively, integrates the coupling signals with fixed time, and obtains bias voltage control error information of the I path, the Q path and the P path respectively, thereby completing automatic control of bias voltage.
In one possible implementation, the determining the error information based on the disturbance modulation signal and the preset reference signal performs a preset integration calculation, includes:
determining an integral calculation rule, and performing integral calculation based on the disturbance modulation signal, the preset reference signal and the integral calculation rule to determine a calculation result;
error information is determined based on the integration result and a reference value.
Specifically, according to an output signal formula of the IQ modulator, different disturbance signals are respectively added to the I-path bias voltage and the Q-path bias voltage, as shown in the following formula:
wherein the I path of perturbation signals areQ paths of perturbation signals are +.>T represents the current moment, and A is the amplitude of the disturbance signal. Expanding the two angles and the formula:
as described above, in order to maintain orthogonality between disturbance signals and prevent crosstalk between I and Q paths during bias point control, a design is madeIntegration time is +.>Wherein N represents clock period, +.>For the frequency of the I-way signal, < >>For the frequency of the Q-way signal, < >>For a set base frequency, the following orthogonal base is formed:
the orthogonal characteristics are as follows:
wherein the fourier transform signal can be seen as being superimposed by signals of endless different frequencies, m being the coefficient of the different signal frequencies.
Multiplying the photo current signal detected by the PIN with the local disturbance signal, namely:
according to the Bessel function, namely:
namely:
thus, the degree of deviation of each signal, that is, error information can be determined. Based on the error information, it can be determined whether or not the signal matches the correct signal, so that a result of matching or non-matching can be obtained.
Step 204: and adjusting the initial modulation signal based on the matching result to determine a target modulation signal.
In one possible implementation, adjusting the initial modulation signal based on the matching result, determining the target modulation signal includes: and under the condition that the matching result is not matched, adjusting the initial modulation signal to determine the target modulation signal.
Specifically, under the condition that the deviation between the current output signal and the ideal signal is large, the current signal is adjusted, so that the current signal is controlled to be accurately output.
For example, for a P-way signal: the P paths of half-wave voltage is set to 9V in a simulation mode, the formula obtained through deduction is available, and when the feedback result is 0, the P paths can be controlled to be at the Quad working point; when the control feedback result is maximum, the P path can be controlled to be at the Max working point.
For the I-way signal: the simulation sets the half-wave voltage of the I path to 6V, and when the feedback result is 0, the I path can be controlled to be at the Min working point. When the bias voltage is 0, the feedback result is also 0, but the working point is Max at the moment, in order to avoid the occurrence of erroneous judgment result, a scanning flow is needed to be added before automatic control, the scanning flow is as follows, the working point can be controlled near the Min point in advance through advanced scanning, and then automatic control is carried out. The bias point can be effectively prevented from being controlled at the Max point.
For the Q-way signal: the simulation sets the half-wave voltage of the Q path to 6V, and when the feedback result is 0, the Q path can be controlled at the Min working point. When the bias voltage is 0, the feedback result is also 0, but the working point is Max at the moment, in order to avoid the occurrence of erroneous judgment result, a scanning flow is needed to be added before automatic control, the scanning flow is as follows, the working point can be controlled near the Min point in advance through advanced scanning, and then automatic control is carried out. The bias point can be effectively prevented from being controlled at the Max point.
In one possible implementation, the method further includes: determining a change modulation parameter in response to the signal modulation change instruction; the initial modulation parameters are replaced with the altered modulation parameters.
In practical application, signal conversion, for example, currently, QSPK modulation, and when the current signal needs to be converted into DPSK modulation, a DPSK modulation parameter may be input through a signal modulation change instruction, so that the current signal is automatically converted.
The embodiment of the specification provides a signal modulation method and device, wherein the signal modulation method comprises the following steps: acquiring an optical carrier of a laser and determining initial modulation parameters; modulating an optical carrier based on the initial modulation parameter, and determining an initial modulation signal; based on the initial modulation signal and a preset reference signal, matching is carried out, and a matching result is determined; wherein the preset reference signal is determined based on the initial modulation parameter; and adjusting the initial modulation signal based on the matching result to determine a target modulation signal. Acquiring an optical carrier of a laser and determining initial modulation parameters; modulating an optical carrier based on the initial modulation parameter, and determining an initial modulation signal; based on the initial modulation signal and a preset reference signal, matching is carried out, and a matching result is determined; wherein the preset reference signal is determined based on the initial modulation parameter; and adjusting the initial modulation signal based on the matching result to determine the target modulation signal, thereby improving the precision of signal modulation.
Further, the embodiment of the present specification has better sensitivity at the phase MZM (mzm_p), as shown in fig. 5, in the method, when mzm_p is controlled around 90 °,is buried in noise. The invention still has good resolution when the MZM_P is controlled to be around 90 degrees. The embodiment of the invention can accurately obtain half-wave voltage, and meanwhile, the method can be used for realizing arbitrary bias point control (based on slope) more easily. According to the embodiment of the specification, compatibility of various modulation formats can be realized through one set of equipment, so that the hardware cost is saved, and the equipment is simpler; meanwhile, the two different systems are compatible, and the communication stability is ensured; the method is compatible with a plurality of modulation formats, can realize rapid switching of modulation systems, and can switch modulation modes according to the current link margin, so that reliable and stable communication is ensured, and communication duration is not wasted; the embodiment of the specification has strong practicability and wide application scene, and the device and the method can be simultaneously applied to laser ground stations, inter-satellite laser loads, satellite-ground laser loads, ground detection systems and the like. For an on-board optical communication system, considering the volume, power consumption and weight requirements of a satellite on an optical communication terminal, a higher-efficiency modulation mode must be adopted, and a larger communication rate and a narrower communication bandwidth are obtained under the same transmitting power. The embodiment of the specification can quickly converge, has a control direction, can quickly converge through a PID algorithm, cannot oscillate back and forth, and supports DPSK, DQPSK, OOK, BPSK, QPSK, so that the engineering practical value is high, and the application is in a sceneAnd (3) wide range.
Referring to fig. 6a, 6b and 6c, fig. 6a, 6b and 6c show overall flowcharts, wherein fig. 6a includes an I-path and Q-path MIN point search section and a P-path transmission curve scanning section, fig. 6b includes an I-path and Q-path transmission curve scanning section, and fig. 6c includes a photoelectric conversion gain adjustment section and an operating point closed-loop control section.
After the end of the setting P-path work at the QUAD point in the P-path transmission curve scanning part, setting I-path and Q-path bias voltages Vbi= -10V, vbq= -10V in the I-path and Q-path transmission curve scanning part, and setting Q-path work at the MIN point in the I-path and Q-path transmission curve scanning part, setting disturbance signal amplitude in the photoelectric conversion gain adjusting part to be 3% of Vpi. The rest may be combined with the solutions in the above embodiments, and will not be described here again.
Corresponding to the method embodiment, the present disclosure further provides an embodiment of a signal modulation device, and fig. 7 shows a schematic structural diagram of a signal modulation device provided in one embodiment of the present disclosure. As shown in fig. 7, the apparatus includes:
a parameter determining module 701 configured to acquire an optical carrier of the laser and determine an initial modulation parameter;
a signal modulation module 702 configured to modulate an optical carrier based on an initial modulation parameter, determining an initial modulation signal;
a signal matching module 703 configured to determine a matching result based on matching the initial modulation signal with a preset reference signal; wherein the preset reference signal is determined based on the initial modulation parameter;
the signal adjustment module 704 is configured to adjust the initial modulation based on the matching result and determine a target modulation signal.
In one possible implementation, the signal modulation module 702 is further configured to:
determining at least one target modulator based on the initial modulation parameters;
the optical carrier is passed through at least one target modulator to obtain an initial modulated signal.
In one possible implementation, the signal matching module 703 is further configured to:
adding disturbance signals to the initial modulation signals to determine disturbance modulation signals;
performing preset integral calculation based on the disturbance modulation signal and a preset reference signal, and determining error information;
a matching result is determined based on the error information.
In one possible implementation, the signal matching module 703 is further configured to:
determining an integral calculation rule, and performing integral calculation based on the disturbance modulation signal, the preset reference signal and the integral calculation rule to determine a calculation result;
error information is determined based on the integration result and a reference value.
In one possible implementation, the signal conditioning module 704 is further configured to:
and under the condition that the matching result is not matched, adjusting the initial modulation signal to determine the target modulation signal.
In one possible implementation, the signal conditioning module 704 is further configured to:
determining a change modulation parameter in response to the signal modulation change instruction;
the initial modulation parameters are replaced with the altered modulation parameters.
In one possible implementation, the parameter determination module 701 is further configured to:
the initial modulation parameters include any one of DPSK modulation parameters, DQPSK modulation parameters, OOK modulation parameters, BPSK modulation parameters, and QPSK modulation parameters.
The embodiment of the specification provides a signal modulation method and device, wherein the signal modulation device comprises the following steps: acquiring an optical carrier of a laser and determining initial modulation parameters; modulating an optical carrier based on the initial modulation parameter, and determining an initial modulation signal; based on the initial modulation signal and a preset reference signal, matching is carried out, and a matching result is determined; wherein the preset reference signal is determined based on the initial modulation parameter; and adjusting the initial modulation signal based on the matching result to determine a target modulation signal. Acquiring an optical carrier of a laser and determining initial modulation parameters; modulating an optical carrier based on the initial modulation parameter, and determining an initial modulation signal; based on the initial modulation signal and a preset reference signal, matching is carried out, and a matching result is determined; wherein the preset reference signal is determined based on the initial modulation parameter; and adjusting the initial modulation signal based on the matching result to determine the target modulation signal, thereby improving the precision of signal modulation.
The above is a schematic scheme of a signal modulation apparatus of the present embodiment. It should be noted that, the technical solution of the signal modulation apparatus and the technical solution of the signal modulation method belong to the same concept, and details of the technical solution of the signal modulation apparatus, which are not described in detail, can be referred to the description of the technical solution of the signal modulation method.
Fig. 8 illustrates a block diagram of a computing device 800 provided in accordance with one embodiment of the present description. The components of computing device 800 include, but are not limited to, memory 810 and processor 820. Processor 820 is coupled to memory 810 through bus 830 and database 850 is used to hold data.
Computing device 800 also includes access device 840, access device 840 enabling computing device 800 to communicate via one or more networks 860. Examples of such networks include public switched telephone networks (PSTN, public Switched Telephone Network), local area networks (LAN, local Area Network), wide area networks (WAN, wide Area Network), personal area networks (PAN, personal Area Network), or combinations of communication networks such as the internet. Access device 840 may include one or more of any type of network interface, wired or wireless, such as a network interface card (NIC, network interface controller), such as an IEEE802.11 wireless local area network (WLAN, wireless Local Area Network) wireless interface, a worldwide interoperability for microwave access (Wi-MAX, worldwide Interoperability for Microwave Access) interface, an ethernet interface, a universal serial bus (USB, universal Serial Bus) interface, a cellular network interface, a bluetooth interface, near field communication (NFC, near Field Communication).
In one embodiment of the present description, the above-described components of computing device 800, as well as other components not shown in FIG. 8, may also be connected to each other, such as by a bus. It should be understood that the block diagram of the computing device illustrated in FIG. 8 is for exemplary purposes only and is not intended to limit the scope of the present description. Those skilled in the art may add or replace other components as desired.
Computing device 800 may be any type of stationary or mobile computing device, including a mobile computer or mobile computing device (e.g., tablet, personal digital assistant, laptop, notebook, netbook, etc.), mobile phone (e.g., smart phone), wearable computing device (e.g., smart watch, smart glasses, etc.), or other type of mobile device, or a stationary computing device such as a desktop computer or personal computer (PC, personal Computer). Computing device 800 may also be a mobile or stationary server.
Wherein the processor 820 is configured to execute computer-executable instructions that, when executed by the processor, perform the steps of the signal modulation method described above. The foregoing is a schematic illustration of a computing device of this embodiment. It should be noted that, the technical solution of the computing device and the technical solution of the signal modulation method belong to the same concept, and details of the technical solution of the computing device, which are not described in detail, can be referred to the description of the technical solution of the signal modulation method.
An embodiment of the present disclosure also provides a computer-readable storage medium storing computer-executable instructions that, when executed by a processor, implement the steps of the signal modulation method described above.
The above is an exemplary version of a computer-readable storage medium of the present embodiment. It should be noted that, the technical solution of the storage medium and the technical solution of the signal modulation method described above belong to the same concept, and details of the technical solution of the storage medium not described in detail may be referred to the description of the technical solution of the signal modulation method described above.
An embodiment of the present disclosure further provides a computer program, where the computer program, when executed in a computer, causes the computer to perform the steps of the signal modulation method described above.
The above is an exemplary version of a computer program of the present embodiment. It should be noted that, the technical solution of the computer program and the technical solution of the signal modulation method belong to the same conception, and details of the technical solution of the computer program, which are not described in detail, can be referred to the description of the technical solution of the signal modulation method.
The foregoing describes specific embodiments of the present disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims can be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.
The computer instructions include computer program code that may be in source code form, object code form, executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the computer readable medium contains content that can be appropriately scaled according to the requirements of jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is subject to legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunication signals.
It should be noted that, for simplicity of description, the foregoing method embodiments are all expressed as a series of combinations of actions, but it should be understood by those skilled in the art that the embodiments are not limited by the order of actions described, as some steps may be performed in other order or simultaneously according to the embodiments of the present disclosure. Further, those skilled in the art will appreciate that the embodiments described in the specification are all preferred embodiments, and that the acts and modules referred to are not necessarily all required for the embodiments described in the specification.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to the related descriptions of other embodiments.
The preferred embodiments of the present specification disclosed above are merely used to help clarify the present specification. Alternative embodiments are not intended to be exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the teaching of the embodiments. The embodiments were chosen and described in order to best explain the principles of the embodiments and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. This specification is to be limited only by the claims and the full scope and equivalents thereof.
Claims (10)
1. A method of signal modulation, comprising:
acquiring an optical carrier of a laser and determining initial modulation parameters;
modulating an optical carrier based on the initial modulation parameter, and determining an initial modulation signal;
based on the initial modulation signal and a preset reference signal, matching is carried out, and a matching result is determined; wherein the preset reference signal is determined based on the initial modulation parameter;
and adjusting the initial modulation signal based on the matching result to determine a target modulation signal.
2. The method of claim 1, wherein the modulating the optical carrier based on the initial modulation parameter, determining an initial modulation signal, comprises:
determining at least one target modulator based on the initial modulation parameters;
and the optical carrier wave passes through the at least one target modulator to obtain an initial modulation signal.
3. The method of claim 1, wherein the determining a match result based on the initial modulation signal matching with a preset reference signal comprises:
adding disturbance signals to the initial modulation signals to determine disturbance modulation signals;
performing preset integral calculation based on the disturbance modulation signal and a preset reference signal, and determining error information;
and determining a matching result based on the error information.
4. A method according to claim 3, wherein said determining error information based on said disturbance modulation signal and a preset reference signal for a preset integration calculation comprises:
determining an integral calculation rule, and performing integral calculation based on the disturbance modulation signal, the preset reference signal and the integral calculation rule to determine a calculation result;
error information is determined based on the integration result and a reference value.
5. The method of claim 1, wherein said adjusting the initial modulation signal based on the matching result to determine a target modulation signal comprises:
and under the condition that the matching result is not matched, adjusting the initial modulation signal to determine a target modulation signal.
6. The method as recited in claim 1, further comprising:
determining a change modulation parameter in response to the signal modulation change instruction;
and replacing the initial modulation parameters with the changed modulation parameters.
7. The method of claim 1, wherein the initial modulation parameter comprises any one of a DPSK modulation parameter, a DQPSK modulation parameter, an OOK modulation parameter, a BPSK modulation parameter, and a QPSK modulation parameter.
8. A signal modulation apparatus, comprising:
the parameter determining module is configured to acquire an optical carrier of the laser and determine initial modulation parameters;
the signal modulation module is configured to modulate the optical carrier based on the initial modulation parameter and determine an initial modulation signal;
the signal matching module is configured to match the initial modulation signal with a preset reference signal and determine a matching result; wherein the preset reference signal is determined based on the initial modulation parameter;
and the signal adjustment module is configured to adjust the initial modulation based on the matching result and determine a target modulation signal.
9. A computing device, comprising:
a memory and a processor;
the memory is configured to store computer executable instructions, and the processor is configured to execute the computer executable instructions, which when executed by the processor, implement the steps of the signal modulation method according to any one of claims 1 to 7.
10. A computer readable storage medium storing computer executable instructions which when executed by a processor implement the steps of the signal modulation method of any one of claims 1 to 7.
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| CN113872699A (en) * | 2021-11-08 | 2021-12-31 | 中国电信股份有限公司 | Light emitting device, method and optical module |
| CN117176529A (en) * | 2023-11-02 | 2023-12-05 | 北京融为科技有限公司 | FSK signal demodulation method and device |
| CN117176526A (en) * | 2023-09-08 | 2023-12-05 | 易兆微电子(杭州)股份有限公司 | GFSK two-point modulation method, device, equipment and storage medium |
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| CN113872699A (en) * | 2021-11-08 | 2021-12-31 | 中国电信股份有限公司 | Light emitting device, method and optical module |
| CN117176526A (en) * | 2023-09-08 | 2023-12-05 | 易兆微电子(杭州)股份有限公司 | GFSK two-point modulation method, device, equipment and storage medium |
| CN117176529A (en) * | 2023-11-02 | 2023-12-05 | 北京融为科技有限公司 | FSK signal demodulation method and device |
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