Composite photoelectric time-frequency signal stripping method, apparatus, storage medium and electronic equipment

Abstract

This invention relates to the field of laser time-frequency signal processing, specifically disclosing a method, apparatus, storage medium, and electronic device for stripping composite optoelectronic time-frequency signals. The method includes: when the composite optoelectronic time-frequency signal is transmitted to the receiving end, combining and superimposing the composite optoelectronic time-frequency signal with a coherent single-frequency local oscillator laser and performing photoelectric detection to obtain a difference frequency signal between the composite optoelectronic time-frequency signal and the coherent single-frequency local oscillator laser; performing low-pass filtering on the difference frequency signal to obtain the stripped coherent laser frequency heterodyne signal, and performing band-pass filtering on the difference frequency signal to obtain a time-frequency composite signal consisting of a time modulation signal and a frequency modulation signal; performing zero-difference matched filtering on the time-frequency composite signal to obtain the stripped frequency modulation signal, and performing baseband matched filtering on the time-frequency composite signal to obtain the stripped time modulation signal. This invention solves the technical problem of crosstalk between various time-frequency signals in composite optoelectronic time-frequency signals.

Description

Technical Field

[0001] This invention relates to the field of laser time-frequency signal processing, and more specifically, to a method, apparatus, storage medium, and electronic device for stripping composite optoelectronic time-frequency signals. Background Technology

[0002] Traditional spread spectrum modulation and demodulation time-frequency transmission systems are primarily suitable for transmitting radio frequency (RF) modulated time signals and RF frequency signals. When coherent optical frequency transmission is further introduced to enhance the efficiency of the time-frequency transmission system, crosstalk occurs between the three signals, and the electrical modulation signal also reduces the short-term frequency stability of the optical frequency transmission. Therefore, in existing technologies, the three signals cannot be parallelized without interfering with each other.

[0003] There is currently no effective solution to the above problems. Summary of the Invention

[0004] This invention provides a method, apparatus, storage medium, and electronic device for stripping composite optoelectronic time-frequency signals, so as to at least solve the technical problem of crosstalk between various time-frequency signals in composite optoelectronic time-frequency signals.

[0005] According to one aspect of the present invention, a method for stripping a composite optoelectronic time-frequency signal is provided, comprising: when the composite optoelectronic time-frequency signal is transmitted to a receiving end, combining and superimposing the composite optoelectronic time-frequency signal with a coherent single-frequency local oscillator laser and performing photoelectric detection to obtain a difference frequency signal between the composite optoelectronic time-frequency signal and the coherent single-frequency local oscillator laser, wherein the composite optoelectronic time-frequency signal is a composite signal of a coherent optical frequency signal, a time modulation signal, and a frequency modulation signal, and the difference frequency signal is a composite signal of a coherent laser frequency heterodyne signal, the time modulation signal, and the frequency modulation signal; performing low-pass filtering on the difference frequency signal to obtain the stripped coherent laser frequency heterodyne signal, and performing band-pass filtering on the difference frequency signal to obtain a time-frequency composite signal of the time modulation signal and the frequency modulation signal; performing zero-difference matched filtering on the time-frequency composite signal to obtain the stripped frequency modulation signal, and performing baseband matched filtering on the time-frequency composite signal to obtain the stripped time modulation signal.

[0006] Optionally, the above-mentioned method of combining and superimposing the composite photoelectric time-frequency signal with the coherent single-frequency local oscillator laser and performing photoelectric detection includes: inputting the composite photoelectric time-frequency signal and the coherent single-frequency local oscillator laser into a beam combiner for beam superposition; and sending the signal output from the beam combiner into a broadband photodetector for photoelectric detection.

[0007] Optionally, the time modulation signal and the frequency modulation signal in the difference frequency signal have the same frequency, while the coherent laser frequency heterodyne signal in the difference frequency signal has a different frequency than the frequency modulation signal.

[0008] Optionally, after obtaining the stripped frequency modulation signal, the method further includes: locking the coherent optical frequency signal in the composite photoelectric time-frequency signal received by the receiver based on the stripped coherent laser frequency heterodyne signal.

[0009] Optionally, locking the coherent optical frequency signal in the composite photoelectric time-frequency signal received by the receiver based on the stripped coherent laser frequency heterodyne signal includes: using a heterodyne phase-locked loop to control and lock the coherent optical frequency signal in the composite photoelectric time-frequency signal received by the receiver based on the stripped coherent laser frequency heterodyne signal.

[0010] Optionally, after obtaining the stripped frequency modulation signal, the method further includes: controlling and locking the frequency modulation signal in the composite photoelectric time-frequency signal received by the receiving end based on the stripped frequency modulation signal.

[0011] Optionally, after obtaining the stripped time modulation signal, the method further includes: controlling and locking the time modulation signal in the composite photoelectric time-frequency signal received by the receiving end based on the stripped time modulation signal.

[0012] According to another aspect of the present invention, a composite optoelectronic time-frequency signal stripping device is also provided, comprising: a superposition detection unit, configured to, when the composite optoelectronic time-frequency signal is transmitted to a receiving end, perform beam superposition of the composite optoelectronic time-frequency signal and a coherent single-frequency local oscillator laser and perform photoelectric detection to obtain a difference frequency signal between the composite optoelectronic time-frequency signal and the coherent single-frequency local oscillator laser, wherein the composite optoelectronic time-frequency signal is a composite signal of a coherent optical frequency signal, a time modulation signal, and a frequency modulation signal, and the difference frequency signal is a composite signal of a coherent laser frequency heterodyne signal, the time modulation signal, and the frequency modulation signal; a first stripping unit, configured to perform low-pass filtering on the difference frequency signal to obtain the stripped coherent laser frequency heterodyne signal, and perform band-pass filtering on the difference frequency signal to obtain a time-frequency composite signal of the time modulation signal and the frequency modulation signal; and a second stripping unit, configured to perform zero-difference matched filtering on the time-frequency composite signal to obtain the stripped frequency modulation signal, and perform baseband matched filtering on the time-frequency composite signal to obtain the stripped time modulation signal.

[0013] According to another aspect of the present invention, a computer-readable storage medium is also provided, wherein a computer program is stored in the computer program, wherein the computer program is configured to execute the above-described composite photoelectric time-frequency signal stripping method when running.

[0014] According to another aspect of the present invention, an electronic device is also provided, including a memory and a processor, wherein the memory stores a computer program and the processor is configured to execute the above-described composite photoelectric time-frequency signal stripping method through the computer program.

[0015] In this embodiment of the invention, when the composite optoelectronic time-frequency signal is transmitted to the receiving end, the composite optoelectronic time-frequency signal and the coherent single-frequency local oscillator laser are combined and superimposed, and photoelectric detection is performed to obtain the difference frequency signal between the composite optoelectronic time-frequency signal and the coherent single-frequency local oscillator laser. The difference frequency signal is low-pass filtered to obtain the stripped coherent laser frequency heterodyne signal. The difference frequency signal is then band-pass filtered to obtain a time-frequency composite signal of time modulation signal and frequency modulation signal. The time-frequency composite signal is then zero-difference matched filtering to obtain the stripped frequency modulation signal. Finally, the time-frequency composite signal is baseband matched filtering to obtain the stripped time modulation signal. By comprehensively employing frequency division multiplexing, and utilizing beam superposition and photoelectric detection, low-pass / band-pass filtering, zero-difference matched filtering, and baseband matched filtering, the crosstalk between various time-frequency signals is effectively suppressed. This achieves high isolation of the time modulation signal, frequency modulation signal, and coherent optical frequency signal, thereby effectively improving the performance of the time-frequency transmission system and solving the technical problem of crosstalk between various time-frequency signals in the composite optoelectronic time-frequency signal. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic flowchart of an optional composite photoelectric time-frequency signal stripping method according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the application process of an optional composite photoelectric time-frequency signal stripping method according to an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of an optional composite photoelectric time-frequency signal stripping device according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of an optional electronic device according to an embodiment of the present invention. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0022] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0023] According to one aspect of the present invention, a composite optoelectronic time-frequency signal stripping method is provided. This composite optoelectronic time-frequency signal stripping method is widely used in the field of high-isolation stripping and demodulation of composite optical time-frequency signals that integrate electrical time frequency and optical frequency. It effectively suppresses crosstalk between various time-frequency signals and lays the foundation for the integrated transmission of composite optical time-frequency signals.

[0024] As an optional implementation method, such as Figure 1 As shown, the above-mentioned composite photoelectric time-frequency signal stripping method includes:

[0025] S102, when the composite optoelectronic time-frequency signal is transmitted to the receiving end, the composite optoelectronic time-frequency signal and the coherent single-frequency local oscillator laser are combined and superimposed and photoelectric detection is performed to obtain the difference frequency signal between the composite optoelectronic time-frequency signal and the coherent single-frequency local oscillator laser;

[0026] In S102, the composite optoelectronic time-frequency signal is a composite signal of coherent optical frequency signal, time modulation signal and frequency modulation signal, and the difference frequency signal is a composite signal of coherent laser frequency heterodyne signal, time modulation signal and frequency modulation signal.

[0027] S104 performs low-pass filtering on the difference frequency signal to obtain the stripped coherent laser frequency heterodyne signal, and performs band-pass filtering on the difference frequency signal to obtain a time-frequency composite signal of time-modulated signal and frequency-modulated signal.

[0028] S106 performs zero-difference matched filtering on the time-frequency composite signal to obtain the stripped frequency modulation signal, and performs baseband matched filtering on the time-frequency composite signal to obtain the stripped time modulation signal.

[0029] The receiver receives, but is not limited to, the composite optoelectronic time-frequency signal transmitted by the transmitter. Since the composite optoelectronic time-frequency signal is modulated by a spread spectrum signal under coherent single-frequency laser light, the composite optoelectronic time-frequency signal transmitted by the transmitter is not limited to a composite signal of coherent optical frequency signal, time modulation signal, and frequency modulation signal. The receiver performs beam combining and photodetection on the received composite optoelectronic time-frequency signal, and then obtains the stripped frequency modulation signal and stripped time modulation signal based on bandpass filtering, zero-difference matched filtering, or baseband matched filtering.

[0030] In this embodiment, when the composite optoelectronic time-frequency signal is transmitted to the receiving end, the composite optoelectronic time-frequency signal and the coherent single-frequency local oscillator laser are combined and superimposed, and photoelectric detection is performed to obtain the difference frequency signal between the composite optoelectronic time-frequency signal and the coherent single-frequency local oscillator laser. The difference frequency signal is low-pass filtered to obtain the stripped coherent laser frequency heterodyne signal. The difference frequency signal is then band-pass filtered to obtain the time-frequency composite signal of the time modulation signal and the frequency modulation signal. The time-frequency composite signal is then zero-difference matched filtering to obtain the stripped frequency modulation signal. Finally, the time-frequency composite signal is baseband matched filtering to obtain the stripped time modulation signal. By comprehensively employing frequency division multiplexing, and utilizing beam superposition and photoelectric detection, low-pass / band-pass filtering, zero-difference matched filtering, and baseband matched filtering, the crosstalk between various time-frequency signals is effectively suppressed. This achieves high isolation between the time modulation signal, the frequency modulation signal, and the coherent optical frequency signal, thereby effectively improving the performance of the time-frequency transmission system and solving the technical problem of crosstalk between various time-frequency signals in the composite optoelectronic time-frequency signal.

[0031] As an optional implementation, the composite photoelectric time-frequency signal is superimposed with a coherent single-frequency local oscillator laser and then photoelectric detection is performed, including:

[0032] S102-2, inputs the composite optoelectronic time-frequency signal and the coherent single-frequency local oscillator laser into the beam combiner for beam combining and superposition;

[0033] S102-4 sends the signal output from the beam combiner to the broadband photodetector for photoelectric detection.

[0034] After receiving the composite photoelectric time-frequency signal, the receiving end combines it with the coherent single-frequency local oscillator laser signal input to a beam combiner for signal superposition, and then sends the signal to a photodetector for photoelectric detection. When there is a certain frequency difference between the coherent optical frequency signal transmitted to the receiving end and the coherent single-frequency local oscillator laser signal, the superposition detection process of the photodetector is laser heterodyne coherent detection, achieving high-sensitivity detection under weak signal conditions. The photodetector obtains the difference frequency signal between the composite photoelectric time-frequency signal and the coherent single-frequency local oscillator laser signal. The difference frequency signal is not limited to including the coherent laser frequency heterodyne signal, frequency modulation signal, and time modulation signal. The photodetector is not limited to a broadband photodetector.

[0035] As an optional implementation, the time modulation signal and the frequency modulation signal in the difference frequency signal have the same frequency, while the coherent laser frequency heterodyne signal in the difference frequency signal has a different frequency than the frequency modulation signal.

[0036] The broadband photodetector outputs the detected coherent laser frequency heterodyne signal, frequency modulation signal, and time modulation signal together. The time modulation signal is superimposed on the frequency modulation signal, therefore the time modulation signal and the frequency modulation signal are at the same frequency. To avoid interference, the coherent laser frequency heterodyne signal and the frequency modulation signal are not limited to being set to different frequencies.

[0037] For difference frequency signals, it is not limited to using low-pass filtering to separate coherent laser frequency heterodyne signals, but also to using band-pass filtering to separate time-frequency composite signals of time-modulated and frequency-modulated signals.

[0038] As an optional implementation, after obtaining the stripped frequency modulation signal, the method further includes: locking the coherent optical frequency signal in the composite optoelectronic time-frequency signal received by the receiver based on the stripped coherent laser frequency heterodyne signal.

[0039] As an optional implementation, locking the coherent optical frequency signal in the composite optoelectronic time-frequency signal received by the receiver based on the stripped coherent laser frequency heterodyne signal includes: using a heterodyne phase-locked loop to control and lock the coherent optical frequency signal in the composite optoelectronic time-frequency signal received by the receiver based on the stripped coherent laser frequency heterodyne signal.

[0040] Optionally, using the coherent laser frequency heterodyne signal, a heterodyne phase-locked loop (PLL) technique is employed to control and lock the coherent single-frequency local oscillator laser signal transmitted from the receiving end to the coherent optical frequency signal transmitted to the receiving end.

[0041] As an optional implementation, after obtaining the stripped frequency modulation signal, the method further includes: controlling and locking the frequency modulation signal in the composite photoelectric time-frequency signal received by the receiving end based on the stripped frequency modulation signal.

[0042] As an optional implementation, after obtaining the stripped time modulation signal, the method further includes: controlling and locking the time modulation signal in the composite photoelectric time-frequency signal received by the receiving end based on the stripped time modulation signal.

[0043] The time-modulated signal and the frequency-modulated signal are not limited to being located in the low-frequency baseband and high-frequency band, respectively. By employing zero-difference matched filtering and baseband matched filtering methods, the separation and control of the frequency-modulated signal and the time-modulated signal are accomplished, respectively.

[0044] Optionally, the application process of composite optoelectronic time-frequency signal stripping is not limited to, for example... Figure 2 As shown, the composite optoelectronic time-frequency signal transmitted from the transmitter to the receiver includes a coherent optical frequency signal, a time-modulated signal, and a frequency-modulated signal. The receiver uses a coherent single-frequency local oscillator laser to perform beam combining and photoelectric detection on the received composite optoelectronic time-frequency signal to obtain a difference frequency signal. The difference frequency signal includes a coherent laser frequency heterodyne signal, a time-modulated signal, and a frequency-modulated signal. A low-pass filter is applied to the difference frequency signal to obtain the coherent laser frequency heterodyne signal, and a band-pass filter is applied to the difference frequency signal to obtain a composite signal of the time-modulated signal and the frequency-modulated signal.

[0045] A heterodyne phase-locked loop (PLL) is used to control the coherent single-frequency local oscillator laser at the receiving end for the coherent laser frequency heterodyne signal. The time-frequency composite signal of the time-modulated signal and the frequency-modulated signal are subjected to zero-difference matched filtering and baseband matched filtering, respectively, to obtain the stripped frequency-modulated signal and the stripped time-modulated signal. Based on the stripped frequency-modulated signal and the time-modulated signal, the frequency-modulated signal and the time-modulated signal in the composite optoelectronic time-frequency signal received at the receiving end are controlled and locked.

[0046] In this embodiment, frequency division multiplexing is comprehensively adopted, and heterodyne phase-locked loop, zero-difference matched filter control and baseband matched filter control are used to effectively suppress crosstalk between various time and frequency signals, achieve high isolation separation of time modulation signal, frequency modulation signal and coherent optical frequency signal, effectively improve the efficiency of time and frequency transmission system, and lay the technical foundation for integrated transmission of composite optoelectronic time and frequency signals.

[0047] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, because according to the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0048] According to another aspect of the present invention, a composite optoelectronic time-frequency signal stripping apparatus for implementing the above-described composite optoelectronic time-frequency signal stripping method is also provided. For example... Figure 3 As shown, the device includes:

[0049] The superposition detection unit 302 is used to combine the composite optoelectronic time-frequency signal and the coherent single-frequency local oscillator laser and perform photoelectric detection when the composite optoelectronic time-frequency signal is transmitted to the receiving end, so as to obtain the difference frequency signal between the composite optoelectronic time-frequency signal and the coherent single-frequency local oscillator laser. The composite optoelectronic time-frequency signal is a composite signal of coherent optical frequency signal, time modulation signal and frequency modulation signal, and the difference frequency signal is a composite signal of coherent laser frequency heterodyne signal, time modulation signal and frequency modulation signal.

[0050] The first stripping unit 304 is used to perform low-pass filtering on the difference frequency signal to obtain the stripped coherent laser frequency heterodyne signal, and to perform band-pass filtering on the difference frequency signal to obtain a time-frequency composite signal of time-modulated signal and frequency-modulated signal.

[0051] The second stripping unit 306 is used to perform zero-difference matched filtering on the time-frequency composite signal to obtain the stripped frequency modulation signal, and to perform baseband matched filtering on the time-frequency composite signal to obtain the stripped time modulation signal.

[0052] Optionally, the superposition detection unit 302 performs photoelectric time-frequency signal and coherent single-frequency local oscillator laser beam superposition and photoelectric detection, including: inputting the composite photoelectric time-frequency signal and coherent single-frequency local oscillator laser into a beam combiner for beam superposition; and sending the signal output from the beam combiner into a broadband photodetector for photoelectric detection.

[0053] Optionally, in the above-mentioned composite optoelectronic time-frequency signal stripping device, the time modulation signal and the frequency modulation signal in the difference frequency signal have the same frequency point, while the coherent laser frequency heterodyne signal in the difference frequency signal has a different frequency point from the frequency modulation signal.

[0054] Optionally, after obtaining the stripped frequency modulation signal, the composite optoelectronic time-frequency signal stripping device further includes: locking the coherent optical frequency signal in the composite optoelectronic time-frequency signal received by the receiver based on the stripped coherent laser frequency heterodyne signal.

[0055] Optionally, the above-mentioned composite optoelectronic time-frequency signal stripping device locks the coherent optical frequency signal in the composite optoelectronic time-frequency signal received by the receiver based on the stripped coherent laser frequency heterodyne signal, including: using a heterodyne phase-locked loop to control and lock the coherent optical frequency signal in the composite optoelectronic time-frequency signal received by the receiver based on the stripped coherent laser frequency heterodyne signal.

[0056] Optionally, after obtaining the stripped frequency modulation signal, the composite optoelectronic time-frequency signal stripping device further includes: controlling and locking the frequency modulation signal in the composite optoelectronic time-frequency signal received by the receiving end based on the stripped frequency modulation signal.

[0057] Optionally, after obtaining the stripped time modulation signal, the composite optoelectronic time-frequency signal stripping device further includes: controlling and locking the time modulation signal in the composite optoelectronic time-frequency signal received by the receiving end based on the stripped time modulation signal.

[0058] In this embodiment, when the composite optoelectronic time-frequency signal is transmitted to the receiving end, the composite optoelectronic time-frequency signal and the coherent single-frequency local oscillator laser are combined and superimposed, and photoelectric detection is performed to obtain the difference frequency signal between the composite optoelectronic time-frequency signal and the coherent single-frequency local oscillator laser. The difference frequency signal is low-pass filtered to obtain the stripped coherent laser frequency heterodyne signal. The difference frequency signal is then band-pass filtered to obtain the time-frequency composite signal of the time modulation signal and the frequency modulation signal. The time-frequency composite signal is then zero-difference matched filtering to obtain the stripped frequency modulation signal. Finally, the time-frequency composite signal is baseband matched filtering to obtain the stripped time modulation signal. By comprehensively employing frequency division multiplexing, and utilizing beam superposition and photoelectric detection, low-pass / band-pass filtering, zero-difference matched filtering, and baseband matched filtering, the crosstalk between various time-frequency signals is effectively suppressed. This achieves high isolation between the time modulation signal, the frequency modulation signal, and the coherent optical frequency signal, thereby effectively improving the performance of the time-frequency transmission system and solving the technical problem of crosstalk between various time-frequency signals in the composite optoelectronic time-frequency signal.

[0059] According to another aspect of the present invention, an electronic device for implementing the above-described composite photoelectric time-frequency signal stripping method is also provided. This electronic device may be a terminal device or a server. Figure 4 As shown, the electronic device includes a memory 402 and a processor 404. The memory 402 stores a computer program, and the processor 404 is configured to execute the steps in any of the above method embodiments via the computer program.

[0060] Optionally, in this embodiment, the aforementioned electronic device may be located in at least one of a plurality of network devices in a computer network.

[0061] Optionally, in this embodiment, the processor can be configured to perform the following steps via a computer program:

[0062] S1, when the composite optoelectronic time-frequency signal is transmitted to the receiving end, the composite optoelectronic time-frequency signal and the coherent single-frequency local oscillator laser are combined and superimposed and photoelectric detection is performed to obtain the difference frequency signal between the composite optoelectronic time-frequency signal and the coherent single-frequency local oscillator laser;

[0063] In S1, the composite optoelectronic time-frequency signal is a composite signal of coherent optical frequency signal, time modulation signal and frequency modulation signal, and the difference frequency signal is a composite signal of coherent laser frequency heterodyne signal, time modulation signal and frequency modulation signal.

[0064] S2, perform low-pass filtering on the difference frequency signal to obtain the stripped coherent laser frequency heterodyne signal, and perform band-pass filtering on the difference frequency signal to obtain a time-frequency composite signal of time-modulated signal and frequency-modulated signal;

[0065] S3 performs zero-difference matched filtering on the time-frequency composite signal to obtain the stripped frequency modulation signal, and performs baseband matched filtering on the time-frequency composite signal to obtain the stripped time modulation signal.

[0066] Alternatively, as those skilled in the art will understand, Figure 4 The structure shown is for illustrative purposes only; the electronic device can be any terminal device. Figure 4 This does not limit the structure of the aforementioned electronic devices. For example, the electronic device may also include components that are more... Figure 4 The more or fewer components shown (such as network interfaces, etc.), or having the same Figure 4 The different configurations shown.

[0067] The memory 402 can be used to store software programs and modules, such as the program instructions / modules corresponding to the monitoring method and device for intelligent devices in this embodiment of the invention. The processor 404 executes various functional applications and data processing by running the software programs and modules stored in the memory 402, thereby realizing the aforementioned composite photoelectric time-frequency signal stripping method. The memory 402 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 402 may further include memory remotely located relative to the processor 404, and these remote memories can be connected to the terminal via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof. Specifically, the memory 402 may be used, but is not limited to, to store information such as composite photoelectric time-frequency signals, coherent single-frequency local oscillator lasers, time-modulated signals, and frequency-modulated signals. As an example, such as Figure 4 As shown, the memory 402 may include, but is not limited to, the superposition detection unit 302, the first stripping unit 304, and the second stripping unit 306 in the composite photoelectric time-frequency signal stripping device. Furthermore, it may include, but is not limited to, other module units in the composite photoelectric time-frequency signal stripping device, which will not be elaborated upon in this example.

[0068] Optionally, the transmission device 406 described above is used to receive or send data via a network. Specific examples of the network described above may include wired networks and wireless networks. In one example, the transmission device 406 includes a Network Interface Controller (NIC), which can be connected to other network devices and a router via a network cable to communicate with the Internet or a local area network. In another example, the transmission device 406 is a Radio Frequency (RF) module, used for wireless communication with the Internet.

[0069] In addition, the above-mentioned electronic device also includes: a display 408 for displaying the above-mentioned composite photoelectric time and frequency signal; and a connection bus 410 for connecting the various module components in the above-mentioned electronic device.

[0070] In other embodiments, the aforementioned terminal device or server can be a node in a distributed system, wherein the distributed system can be a blockchain system, which is a distributed system formed by connecting multiple nodes through network communication. The nodes can form a peer-to-peer (P2P) network, and any form of computing device, such as a server, terminal, or other electronic device, can become a node in the blockchain system by joining this peer-to-peer network.

[0071] According to one aspect of this application, a computer program product or computer program is provided, comprising computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the methods provided in various alternative implementations of the composite optoelectronic time-frequency signal stripping described above. The computer program is configured to execute the steps in any of the above method embodiments at runtime.

[0072] Optionally, in this embodiment, the computer-readable storage medium described above may be configured to store a computer program for performing the following steps:

[0073] S1, when the composite optoelectronic time-frequency signal is transmitted to the receiving end, the composite optoelectronic time-frequency signal and the coherent single-frequency local oscillator laser are combined and superimposed and photoelectric detection is performed to obtain the difference frequency signal between the composite optoelectronic time-frequency signal and the coherent single-frequency local oscillator laser;

[0074] In S1, the composite optoelectronic time-frequency signal is a composite signal of coherent optical frequency signal, time modulation signal and frequency modulation signal, and the difference frequency signal is a composite signal of coherent laser frequency heterodyne signal, time modulation signal and frequency modulation signal.

[0075] S2, perform low-pass filtering on the difference frequency signal to obtain the stripped coherent laser frequency heterodyne signal, and perform band-pass filtering on the difference frequency signal to obtain a time-frequency composite signal of time-modulated signal and frequency-modulated signal;

[0076] S3 performs zero-difference matched filtering on the time-frequency composite signal to obtain the stripped frequency modulation signal, and performs baseband matched filtering on the time-frequency composite signal to obtain the stripped time modulation signal.

[0077] Optionally, in this embodiment, those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be implemented by a program instructing the hardware related to the terminal device. The program can be stored in a computer-readable storage medium, which may include: flash drive, read-only memory (ROM), random access memory (RAM), disk or optical disk, etc.

[0078] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0079] If the integrated units in the above embodiments are implemented as software functional units and sold or used as independent products, they can be stored in the aforementioned computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause one or more computer devices (which may be personal computers, servers, or network devices, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention.

[0080] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0081] In the several embodiments provided in this application, it should be understood that the disclosed client can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, indirect coupling or communication connection between units or modules, and may be electrical or other forms.

[0082] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0083] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0084] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A method for stripping composite photoelectric time-frequency signals, characterized in that, include: When the composite optoelectronic time-frequency signal is transmitted to the receiving end, the composite optoelectronic time-frequency signal and the coherent single-frequency local oscillator laser are combined and superimposed and photoelectric detection is performed to obtain the difference frequency signal between the composite optoelectronic time-frequency signal and the coherent single-frequency local oscillator laser. The composite optoelectronic time-frequency signal is a composite signal of coherent optical frequency signal, time modulation signal and frequency modulation signal, and the difference frequency signal is a composite signal of coherent laser frequency heterodyne signal, time modulation signal and frequency modulation signal. The difference frequency signal is low-pass filtered to obtain the stripped coherent laser frequency heterodyne signal, and the difference frequency signal is band-pass filtered to obtain the time-frequency composite signal of the time modulation signal and the frequency modulation signal. The time-frequency composite signal is subjected to zero-difference matched filtering to obtain the stripped frequency modulation signal, and the time-frequency composite signal is subjected to baseband matched filtering to obtain the stripped time modulation signal.

2. The method according to claim 1, characterized in that, The step of combining and superimposing the composite photoelectric time-frequency signal with a coherent single-frequency local oscillator laser and performing photoelectric detection includes: The composite photoelectric time-frequency signal and the coherent single-frequency local oscillator laser are input into a beam combiner and superimposed. The signal output from the beam combiner is sent to a broadband photodetector for photoelectric detection.

3. The method according to claim 1, characterized in that, The time modulation signal and the frequency modulation signal in the difference frequency signal have the same frequency point, while the coherent laser frequency heterodyne signal in the difference frequency signal has a different frequency point from the frequency modulation signal.

4. The method according to claim 1, characterized in that, After obtaining the stripped frequency modulation signal, the process further includes: Based on the extracted coherent laser frequency heterodyne signal, the coherent optical frequency signal in the composite optoelectronic time-frequency signal received by the receiver is locked.

5. The method according to claim 4, characterized in that, The method of locking the coherent optical frequency signal in the composite optoelectronic time-frequency signal received by the receiver based on the stripped coherent laser frequency heterodyne signal includes: Based on the extracted coherent laser frequency heterodyne signal, a heterodyne phase-locked loop is used to control and lock the coherent optical frequency signal in the composite photoelectric time-frequency signal received by the receiving end.

6. The method according to claim 1, characterized in that, After obtaining the stripped frequency modulation signal, the process further includes: Based on the extracted frequency modulation signal, the frequency modulation signal in the composite photoelectric time-frequency signal received by the receiving end is controlled and locked.

7. The method according to claim 1, characterized in that, After obtaining the stripped time-modulated signal, the process further includes: Based on the extracted time modulation signal, the time modulation signal in the composite photoelectric time-frequency signal received by the receiving end is controlled and locked.

8. A composite photoelectric time-frequency signal stripping device, characterized in that, include: The superposition detection unit is used to combine and superimpose the composite optoelectronic time-frequency signal with a coherent single-frequency local oscillator laser and perform photoelectric detection when the composite optoelectronic time-frequency signal is transmitted to the receiving end, thereby obtaining the difference frequency signal between the composite optoelectronic time-frequency signal and the coherent single-frequency local oscillator laser. The composite optoelectronic time-frequency signal is a composite signal of a coherent optical frequency signal, a time modulation signal, and a frequency modulation signal, and the difference frequency signal is a composite signal of a coherent laser frequency heterodyne signal, the time modulation signal, and the frequency modulation signal. The first stripping unit is used to perform low-pass filtering on the difference frequency signal to obtain the stripped coherent laser frequency heterodyne signal, and to perform band-pass filtering on the difference frequency signal to obtain a time-frequency composite signal of the time modulation signal and the frequency modulation signal. The second stripping unit is used to perform zero-difference matched filtering on the time-frequency composite signal to obtain the stripped frequency modulation signal, and to perform baseband matched filtering on the time-frequency composite signal to obtain the stripped time modulation signal.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein the program, when executed, performs the method described in any one of claims 1 to 7.

10. An electronic device comprising a memory and a processor, characterized in that, The memory stores a computer program, and the processor is configured to execute the method described in any one of claims 1 to 7 through the computer program.

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