Cognitive communication system and method based on ultra-wideband photon radio frequency transceiving

Abstract

The cognitive communication system comprises a spectrum sensing unit, an intelligent cognitive communication decision module, a reconfigurable optical local oscillator generation module, a digital signal processing module, a cognitive communication receiving end and a cognitive communication transmitting end. The cognitive communication receiving end comprises a communication receiving radio frequency processing module, a photon radio frequency communication receiving module and a communication receiving intermediate frequency processing module; the cognitive communication transmitting end comprises a communication transmitting radio frequency processing module, a photon radio frequency communication transmitting module and a communication transmitting intermediate frequency processing module; the photon radio frequency communication receiving module converts a radio frequency signal into an optical carrier wave through optical carrier wave modulation, and down-converts the optical carrier wave into an intermediate frequency by using a reconfigurable optical local oscillator signal; the photon radio frequency communication transmitting module converts an intermediate frequency signal into an optical carrier through optical carrier modulation, and performs up-conversion to a radio frequency by using a reconfigurable optical local oscillator signal. According to the invention, through deep fusion of the photon technology and cognitive communication, the bandwidth, flexibility, anti-interference capability and dynamic reconstruction capability of the system are significantly improved.

Description

Technical Field

[0001] The present invention relates to the field of microwave photonics technology, and in particular, to a cognitive communication system and method based on ultra-wideband photon radio frequency transceiver. Background Art

[0002] With the rapid development of wireless communication technology, the spectrum resources are becoming increasingly tense, and traditional communication systems are facing many challenges. Ultra-wideband cognitive communication, as an emerging communication technology that combines cognitive communication decision-making with broadband radio technology, has important research value and application prospects.

[0003] Cognitive communication mainly includes two key parts: ultra-wideband reconfigurable transceiver and intelligent cognitive decision-making. Its core lies in carrying out intelligent cognition and decision-making based on the perception results of the electromagnetic environment and communication channels, and then configuring transceiver parameters such as the operating frequency and data transmission bandwidth of the cognitive communication transceiver front-end, and selecting the optimal communication channel and strategy. In this way, it can significantly improve the spectrum utilization rate, enhance the stability of the wireless communication system, effectively reduce various unintentional interferences introduced by environmental factors during the wireless communication process, and at the same time avoid electromagnetic attacks.

[0004] In the prior art, such as the Chinese invention patent with the publication number CN109802692A, high-frequency signal processing is achieved through multi-stage up / down conversion and frequency multiplication technologies. Multi-stage frequency conversion leads to hardware redundancy, increases power consumption and volume, and lacks flexibility; such as the Chinese invention patent with the publication number CN119135297A, the system relies on a fixed algorithm library for spectrum management and lacks real-time closed-loop control ability, resulting in response delay; such as the Chinese invention patent with the publication number CN102075943A, spectrum notch or blocking interference is adopted, and it is difficult to balance narrowband interference suppression and efficient transmission of broadband signals.

[0005] Ultra-wideband photon radio frequency transceiver technology has obvious advantages over digital radio frequency transceivers in terms of indicators such as working bandwidth, frequency conversion spurs, and isolation degree, providing a new solution idea for the flexible reconfiguration of frequency, bandwidth, and function in cognitive communication. Therefore, designing a cognitive communication system and method based on ultra-wideband photon radio frequency transceiver is an urgent problem to be solved. Summary of the Invention

[0006] To solve the technical problems existing in the above prior art, the purpose of the present invention is to provide a cognitive communication system and method based on ultra-wideband photon radio frequency transceiver. By deeply integrating photon technology with cognitive communication, the bandwidth, flexibility, anti-interference ability, and dynamic reconfiguration ability of the system are significantly improved.

[0007] To achieve the above invention purpose, the present invention provides a cognitive communication system based on ultra-wideband photon radio frequency transceiver, including:

[0008] A spectrum sensing unit, which is used to sense the spectrum occupancy status and communication channel status in the electromagnetic environment and output spectrum situation information;

[0009] An intelligent cognitive communication decision-making module, which generates a communication strategy according to the spectrum situation information;

[0010] A reconfigurable optical local oscillator generation module, which is used to generate an ultra-wideband tunable and reconfigurable optical local oscillator signal, supporting flexible tuning across the entire frequency band;

[0011] A cognitive communication receiver, which includes a communication receiving radio frequency processing module, a photonic radio frequency communication receiving module, and a communication receiving intermediate frequency processing module;

[0012] A cognitive communication transmitter, which includes a communication transmitting radio frequency processing module, a photonic radio frequency communication transmitting module, and a communication transmitting intermediate frequency processing module;

[0013] A digital signal processing module, which is used to convert a baseband digital signal into an analog signal at the transmitter, and perform analog-to-digital conversion and demodulation of an intermediate frequency signal into a baseband signal at the receiver;

[0014] Wherein, the photonic radio frequency communication receiving module converts a radio frequency signal into an optical carrier through optical carrier modulation, and down-converts it to an intermediate frequency using the reconfigurable optical local oscillator signal; the photonic radio frequency communication transmitting module converts an intermediate frequency signal into an optical carrier through optical carrier modulation, and up-converts it to a radio frequency using the reconfigurable optical local oscillator signal.

[0015] According to a technical solution of the present invention, the communication receiving radio frequency processing module is used to perform low-noise amplification, filtering, and gain control on the received radio frequency signal;

[0016] The communication receiving intermediate frequency processing module is used to configure the bandwidth and center frequency of the intermediate frequency signal, and output a signal that can be effectively processed by the digital signal processing module.

[0017] According to a technical solution of the present invention, the communication transmitting intermediate frequency processing module is used to convert a baseband signal into an intermediate frequency and configure intermediate frequency parameters;

[0018] The communication transmitting radio frequency processing module is used to perform power amplification and filtering on the radio frequency signal.

[0019] According to a technical solution of the present invention, both the photonic radio frequency communication receiving module and the photonic radio frequency communication transmitting module include:

[0020] An electro-optic modulator, which is used to modulate a radio frequency or intermediate frequency signal onto an optical carrier;

[0021] An optical amplifier, which is used to amplify an optical signal and compensate for the loss of the optical signal during transmission and modulation;

[0022] An optical filter for filtering an optical signal to remove out-of-band noise and stray light signals;

[0023] An optical coupler for splitting or combining optical signals;

[0024] An optoelectronic detector for mixing an optical carrier signal with a reconfigurable local optical oscillator signal to achieve frequency conversion in the optoelectronic domain.

[0025] According to one technical solution of the present invention, the digital signal processing module includes a digital-to-analog conversion module and a communication signal processing module.

[0026] According to one technical solution of the present invention, the frequency of the local optical oscillator signal covers 40 GHz.

[0027] According to one technical solution of the present invention, the intermediate frequency signal output by the communication transmitting intermediate frequency processing module is a low intermediate frequency signal, and the frequency band range is 1 GHz to 2 GHz.

[0028] According to one technical solution of the present invention, the reconfigurable local optical oscillator generation module realizes continuous tuning of the local optical oscillator frequency by tuning the optical wavelength, and the tuning step accuracy is less than 1 MHz.

[0029] According to one technical solution of the present invention, the digital signal processing module supports a data rate of more than 140 Mbps and outputs the eye diagram and IQ constellation diagram of the baseband signal.

[0030] According to one aspect of the present invention, a cognitive communication method using a cognitive communication system based on ultra-wideband photon radio frequency transceiver as described in any one of the above technical solutions is proposed, including the following steps:

[0031] Real-time sensing of the electromagnetic environment and communication channel status by a spectrum sensing unit to generate spectrum situation information;

[0032] Based on the spectrum situation information, using an intelligent cognitive communication decision module to generate a dynamic communication parameter configuration strategy, including the operating frequency band, bandwidth, and data transmission rate;

[0033] According to the configuration strategy, adjust the local optical oscillator frequency of the reconfigurable local optical oscillator generation module, and synchronously configure the parameters of the cognitive communication receiving end and the transmitting end;

[0034] At the cognitive communication transmitting end: generate a baseband signal through a digital signal processing module and convert it into an intermediate frequency analog signal, modulate the intermediate frequency signal to an optical carrier using a photon radio frequency communication transmitting module, after frequency conversion to the target radio frequency frequency by a reconfigurable local optical oscillator, and then transmit it after processing by a transmitting radio frequency processing module;

[0035] At the cognitive communication receiver: After preprocessing the received radio frequency signal, the preprocessed radio frequency signal is upconverted to an optical carrier by a photonic radio frequency communication receiving module, then downconverted to an intermediate frequency by a reconfigurable optical local oscillator, and then the output intermediate frequency signal is processed by the photonic radio frequency communication receiving module to output a low intermediate frequency signal conducive to digital acquisition, and finally input to the digital signal processing module.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] The present invention proposes a cognitive communication system and method based on ultra-wideband photonic radio frequency transceiver. By deeply integrating photonic technology with cognitive communication, the bandwidth, flexibility, anti-interference ability, and dynamic reconfiguration ability of the system are significantly improved.

[0038] In the present invention, the ultra-wideband signal processing ability is realized through photonic radio frequency transceiver technology, breaking through the bottleneck of the traditional radio frequency system limited by the bandwidth of electronic devices. By using the reconfigurable optical local oscillator generation module, full-band continuous tuning and high-precision stepping are realized, and the dynamic reconfiguration of frequency bands and bandwidth is achieved.

[0039] In the present invention, through the spectrum sensing unit and the intelligent cognitive communication decision module, strong narrowband interference signals can be detected in real time, and combined with the dynamic reconfiguration ability of the photonic radio frequency module, the communication frequency band and bandwidth can be quickly adjusted to effectively avoid interference. At the same time, through optical carrier modulation and optoelectronic mixing, the present application realizes the signal conversion in the electro-optical domain, significantly reducing the signal transmission loss and improving the anti-electromagnetic interference ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0041] Figure 1 Schematically showing the structural diagram of a cognitive communication system based on ultra-wideband photonic radio frequency transceiver in an embodiment of the present invention;

[0042] Figure 2 Schematically showing the signal processing flow diagram of a cognitive communication system based on ultra-wideband photonic radio frequency transceiver in an embodiment of the present invention;

[0043] FIG. 3(a-d) schematically shows the simulation diagram of the signal transmitter of a cognitive communication system based on ultra-wideband photonic radio frequency transceiver in an embodiment of the present invention;

[0044] FIG. 4(a-d) schematically shows a simulation diagram of the signal receiving end of a cognitive communication system based on ultra-wideband photon radio frequency transceiver in an embodiment of the present invention. Detailed implementation manners

[0045] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0046] As Figure 1 shown, the present invention provides a cognitive communication system based on ultra-wideband photon radio frequency transceiver, which mainly consists of a spectrum sensing unit, a cognitive communication receiving end, a cognitive communication transmitting end, a digital signal processing module, an intelligent cognitive communication decision-making module, and a reconfigurable optical local oscillator generation module.

[0047] The spectrum sensing unit is used to sense the spectrum occupancy status and communication channel status in the electromagnetic environment and output spectrum situation information;

[0048] By comprehensively sensing the situation of the spectrum environment and communication channels, the spectrum sensing unit can, based on advanced spectrum monitoring technologies and algorithms, obtain key information such as the occupancy of the spectrum and the quality of the channel in real time, and input the sensed information into the digital signal processing module in a timely and accurate manner, providing a data basis for subsequent decision-making.

[0049] The intelligent cognitive communication decision-making module generates a communication strategy according to the spectrum situation information;

[0050] The intelligent cognitive communication decision-making module deeply analyzes and processes the sensing information transmitted by the spectrum sensing unit, and generates an optimal cognitive communication strategy in combination with the current and historical spectrum situations. The cognitive communication strategy includes selecting appropriate operating frequencies, bandwidths, modulation methods, etc. to achieve efficient and stable communication.

[0051] The reconfigurable optical local oscillator generation module is used to generate an ultra-wideband tunable and reconfigurable optical local oscillator signal, supporting flexible tuning across the entire frequency band;

[0052] The reconfigurable optical local oscillator generation module is a common module for the cognitive communication receiving end and the transmitting end, and can generate the ultra-wideband reconfigurable optical local oscillator required for receiving and transmitting communication signals. The frequency of the reconfigurable optical local oscillator can be flexibly adjusted across the entire frequency band according to communication requirements, providing a stable and accurate local oscillator signal for the photon radio frequency communication receiving module and the transmitting module, and ensuring the smooth progress of the modulation and optoelectronic conversion processes of the optical carrier.

[0053] A cognitive communication receiving end, including a communication receiving radio frequency processing module, a photon radio frequency communication receiving module, and a communication receiving intermediate frequency processing module;

[0054] Communication receiving RF processing module: It is mainly responsible for receiving RF signals, and also has functions such as low noise amplifier (low noise amplification), filtering, and frequency conversion. When receiving weak RF signals, the low noise amplifier function can effectively amplify the signal while minimizing the introduction of additional noise; the filtering function can remove clutter and interference in the signal and improve the purity of the signal; the frequency conversion function converts the received RF signal to a suitable frequency range for subsequent processing.

[0055] Photonic RF communication receiving module: responsible for performing electro-optical modulation of the optical carrier signal and performing photoelectric conversion through the optical local oscillator. The photonic RF communication receiving module can modulate the RF signal onto the optical carrier, transmit and process it using the characteristics of light, and then use the optical local oscillator to achieve photoelectric conversion, converting the optical signal back to an electrical signal, completing the conversion of the signal between the optical domain and the electrical domain.

[0056] Communication receiving intermediate frequency processing module: The main function is to configure the intermediate frequency position and bandwidth of the intermediate frequency signal after photon frequency conversion. According to different communication requirements and signal characteristics, the communication receiving intermediate frequency processing module can flexibly adjust the frequency position and bandwidth of the intermediate frequency signal, making the signal more suitable for subsequent digital acquisition and processing.

[0057] The cognitive communication transmitting end includes a communication transmitting radio frequency processing module, a photon radio frequency communication transmitting module, and a communication transmitting intermediate frequency processing module;

[0058] Communication transmission RF processing module: amplifies (amplifies), filters, frequency converts and transmits RF signals. Before transmitting the signal, the power amplifier function can enhance the power of the signal to ensure that the signal can maintain sufficient strength during long-distance transmission; the filtering function further removes interference components in the signal; and the frequency conversion function adjusts the signal to the appropriate transmission frequency.

[0059] Photonic RF communication transmitter module: It also performs electro-optical modulation of the optical carrier on the signal and performs photoelectric conversion through the optical local oscillator. It modulates the electrical signal to be transmitted onto the optical carrier to achieve optical domain transmission, and then completes the photoelectric conversion through the optical local oscillator to convert the optical signal into a RF signal suitable for transmission.

[0060] Communication transmission intermediate frequency processing module: converts the baseband signal to the intermediate frequency and configures the intermediate frequency position and bandwidth. In the transmission process, it plays an important role in converting the baseband signal into an intermediate frequency signal suitable for transmission and adjusting the intermediate frequency signal parameters according to requirements.

[0061] A digital signal processing module, which is used to convert a baseband digital signal into an analog signal at the transmitting end, and perform analog-to-digital conversion and demodulation on an intermediate frequency signal into a baseband signal at the receiving end;

[0062] At the transmitting end, this module is responsible for digital signal generation and digital-to-analog conversion, and outputs an analog signal. It generates corresponding digital signals according to the communication protocol and data content, and then converts the digital signals into analog signals through digital-to-analog conversion technology to prepare for subsequent radio frequency transmission; at the receiving end, it performs processing such as analog-to-digital conversion on the intermediate frequency signal and outputs a data signal. The received analog intermediate frequency signal is converted into a digital signal for convenient digital signal processing and demodulation to restore the original communication data.

[0063] In some embodiments of the present invention, both the photon radio frequency communication receiving module and the photon radio frequency communication transmitting module include:

[0064] An electro-optic modulator, which is used to modulate a radio frequency or intermediate frequency signal onto an optical carrier;

[0065] An optical amplifier, which is used to amplify the optical signal and compensate for the loss of the optical signal during transmission and modulation;

[0066] An optical filter, which is used to filter the optical signal to filter out out-of-band noise and stray light signals;

[0067] An optical coupler, which splits or combines the optical signal;

[0068] A photodetector, which is used to mix the optical carrier signal with the reconfigurable optical local oscillator signal to achieve frequency conversion in the optoelectronic domain.

[0069] In some embodiments of the present invention, the communication receiving radio frequency processing module and the communication transmitting radio frequency processing module at least include a radio frequency band power amplifier and a radio frequency band filter.

[0070] In some embodiments of the present invention, the communication receiving intermediate frequency processing module and the communication transmitting intermediate frequency processing module at least include an intermediate frequency low-noise amplifier and an intermediate frequency filter.

[0071] In some embodiments of the present invention, the digital signal processing module includes a digital-to-analog conversion module and a communication signal processing module.

[0072] In some embodiments of the present invention, the frequency of the optical local oscillator signal covers 40 GHz.

[0073] In some embodiments of the present invention, the intermediate frequency signal output by the communication transmitting intermediate frequency processing module is a low intermediate frequency signal, and the frequency band range is 1 GHz to 2 GHz.

[0074] In some embodiments of the present invention, the reconfigurable optical local oscillator generation module realizes continuous tuning of the optical local oscillator frequency by tuning the optical wavelength, and the tuning step accuracy is less than 1 MHz.

[0075] In some embodiments of the present invention, the digital signal processing module supports a data rate of more than 140 Mbps and outputs the eye diagram and IQ constellation diagram of the baseband signal.

[0076] As Figure 2 shown, according to one aspect of the present invention, there is provided a cognitive communication method using a cognitive communication system based on an ultra-wideband photon radio frequency transceiver as described in any one of the above technical solutions, including the following steps:

[0077] The spectrum signal is first collected and preliminarily processed by the spectrum sensing system, and then enters the digital signal processing module. The digital signal processing module further analyzes and processes the preliminarily processed spectrum signal, extracts useful information, and inputs the spectrum sensing result into the intelligent cognitive communication decision-making module;

[0078] After receiving the sensing result, the intelligent cognitive communication decision-making module performs comprehensive analysis based on the preset algorithms and policy libraries, and combines the current and historical spectrum situations to generate an optimal cognitive communication strategy. Among them, the strategy includes determining appropriate parameters such as working frequency, bandwidth, and data transmission rate to select the optimal communication channel.

[0079] The cognitive decision result is output to the cognitive communication receiving end, the cognitive communication transmitting end, the reconfigurable optical local oscillator generation module, and the digital signal processing module. Each module reasonably sets parameters such as the working frequency and bandwidth of the cognitive communication transceiver according to the received decision instruction.

[0080] At the cognitive communication receiving end, the communication receiving radio frequency processing module processes the received communication signal such as low-noise amplification, filtering, and gain control to improve the signal quality. The photon radio frequency communication receiving module up-converts the radio frequency processed communication radio frequency signal to the optical domain, and then down-converts it to the intermediate frequency by the reconfigurable optical local oscillator. The reconfigurable optical local oscillator generation module generates an optical local oscillator that can be flexibly adjusted within the full frequency band to ensure the accuracy of the frequency conversion process. The communication receiving intermediate frequency processing module processes the intermediate frequency signal output by the photon radio frequency communication receiving module, adjusts the intermediate frequency position and bandwidth, and outputs a low intermediate frequency signal conducive to digital acquisition, which is input to the digital signal processing module.

[0081] At the cognitive communication transmitter, the communication transmit intermediate frequency processing module converts the baseband digital signal output by the digital signal processing module into a low intermediate frequency analog signal to be transmitted. The photonic radio frequency communication transmit module modulates the low intermediate frequency analog signal to be transmitted onto an optical carrier, and frequency-converts it to a radio frequency transmit communication signal through the reconfigurable optical local oscillator generation module. The transmit communication signal undergoes filtering, gain control, power amplification, etc. through the communication transmit radio frequency processing module, and finally realizes the transmission of the communication signal.

[0082] The following further describes the cognitive communication system and method based on ultra-wideband photonic radio frequency transceiver of the present invention based on a specific example.

[0083] As Figure 2 shown, taking the Ka band as an example, the center frequency of the transceiver signal is set to 40 GHz and the data rate is 140 Mbps.

[0084] Transmitter: The digital signal processing module generates a baseband signal according to the communication protocol and data content (as shown in the appendix Figure 3a ). The communication transmit intermediate frequency processing module processes the baseband signal and outputs an intermediate frequency signal (as shown in the appendix Figure 3b ). This intermediate frequency signal is loaded onto an optical carrier through electro-optic modulation to generate an optical carrier radio frequency signal. The reconfigurable optical local oscillator generation module tunes the optical local oscillator frequency to the corresponding position according to the frequency of the radio frequency signal to be transmitted (as shown in the appendix Figure 3c ). After frequency conversion by the photonic radio frequency communication transmit module, a transmit radio frequency signal with a set frequency is generated, and its center frequency is 40 GHz (as shown in the appendix Figure 3d ). Each module at the transmitter works in coordination to ensure the quality and accuracy of the transmit signal. Before transmitting the signal, the communication transmit radio frequency processing module performs strict filtering and power amplification on the signal to meet the requirements of communication distance and signal strength.

[0085] Receiver: To verify the receiving function, the power of the input signal is set to -60 dBm, as shown in the appendix Figure 4a . The radio frequency signal is loaded onto an optical carrier through electro-optic modulation to generate an optical carrier radio frequency signal. The reconfigurable optical local oscillator generation module tunes the optical local oscillator frequency to the corresponding position according to the frequency of the radio frequency signal to be transmitted (as shown in the appendix Figure 4b ). After frequency conversion by the photonic radio frequency communication receive module, an intermediate frequency signal is generated (as shown in the appendix Figure 4c ). The intermediate frequency signal undergoes ADC (analog-to-digital converter) and digital signal processing to obtain the baseband signal, eye diagram, and IQ signal constellation diagram (as shown in the appendix Figure 4d(as shown). It can be seen from the simulation results that in the cognitive communication system based on ultra-wideband photon radio frequency transceiver proposed by the present invention, broadband signals can be correctly transmitted and received, and correctly demodulated. A series of measures need to be taken at the receiving end to improve the receiving quality and reliability of the signals. When the communication receiving radio frequency processing module receives signals, it should minimize the introduction of noise and improve the signal-to-noise ratio of the signals; the communication receiving intermediate frequency processing module should accurately adjust the parameters of the intermediate frequency signals to ensure that the digital signal processing module can correctly collect and process the signals.

[0086] In summary, by proposing a cognitive communication system and method based on ultra-wideband photon radio frequency transceiver, the present invention effectively solves the problems of flexible reconfiguration of frequency bands, bandwidths, and functions in cognitive communication, improves the spectrum utilization rate and the performance of the communication system, and has important theoretical significance and practical application value.

[0087] The parts not elaborated in detail in the present invention belong to the well-known technologies in the art.

[0088] Finally, it should also be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0089] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The various embodiments can be combined as needed, and the same or similar parts can be referred to each other.

[0090] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cognitive communication system based on ultra-wideband photon radio frequency transceiver, characterized in that, Including: A spectrum sensing unit, which is used to sense the spectrum occupancy status and communication channel status in the electromagnetic environment and output spectrum situation information; An intelligent cognitive communication decision-making module, which generates a communication strategy according to the spectrum situation information; A reconfigurable optical local oscillator generation module, which is used to generate an ultra-wideband tunable and reconfigurable optical local oscillator signal, supporting flexible tuning across the entire frequency band; A cognitive communication receiving end, including a communication receiving radio frequency processing module, a photon radio frequency communication receiving module, and a communication receiving intermediate frequency processing module; A cognitive communication transmitting end, including a communication transmitting radio frequency processing module, a photon radio frequency communication transmitting module, and a communication transmitting intermediate frequency processing module; A digital signal processing module, which is used to convert a baseband digital signal into an analog signal at the transmitting end, and perform analog-to-digital conversion and demodulate it into a baseband signal on the intermediate frequency signal at the receiving end; Among them, the photon radio frequency communication receiving module converts a radio frequency signal into an optical carrier through optical carrier modulation, and down-converts it to an intermediate frequency using the reconfigurable optical local oscillator signal; the photon radio frequency communication transmitting module converts an intermediate frequency signal into an optical carrier through optical carrier modulation, and up-converts it to a radio frequency using the reconfigurable optical local oscillator signal.

2. The cognitive communication system based on ultra-wideband photon radio frequency transceiver according to claim 1, characterized in that, The communication receiving radio frequency processing module is used to perform low-noise amplification, filtering, and gain control on the received radio frequency signal; The communication receiving intermediate frequency processing module is used to configure the bandwidth and center frequency of the intermediate frequency signal, and output a signal that can be effectively processed by the digital signal processing module.

3. The cognitive communication system based on ultra-wideband photonic radio frequency transceiver according to claim 1, characterized in that The communication transmitting intermediate frequency processing module is used to convert a baseband signal into an intermediate frequency and configure intermediate frequency parameters; The communication transmitting radio frequency processing module is used to perform power amplification and filtering on the radio frequency signal.

4. The cognitive communication system based on ultra-wideband photonic radio frequency transceiver according to claim 1, characterized in that, Both the photon radio frequency communication receiving module and the photon radio frequency communication transmitting module include: An electro-optic modulator, which is used to modulate a radio frequency or intermediate frequency signal onto an optical carrier; An optical amplifier, which is used to amplify an optical signal and compensate for the loss of the optical signal during transmission and modulation; An optical filter, which is used to filter an optical signal and filter out out-of-band noise and stray light signals; An optical coupler, which splits or combines optical signals; A photodetector, which is used to mix an optical carrier signal with a reconfigurable optical local oscillator signal to achieve photoelectric domain frequency conversion.

5. The cognitive communication system based on ultra-wideband photonic radio frequency transceiver according to claim 1, characterized in that, The digital signal processing module includes a digital-to-analog conversion module and a communication signal processing module.

6. The cognitive communication system based on ultra-wideband photon radio frequency transceiver according to claim 1, wherein The frequency of the optical local oscillator signal covers 40 GHz.

7. The cognitive communication system based on ultra-wideband photon radio frequency transceiver according to claim 1, characterized in that, The intermediate frequency signal output by the communication transmitting intermediate frequency processing module is a low intermediate frequency signal, and the frequency band range is 1 GHz to 2 GHz.

8. The cognitive communication system based on ultra-wideband photon radio frequency transceiver according to claim 1, characterized in that The reconfigurable optical local oscillator generation module realizes continuous tuning of the optical local oscillator frequency by tuning the optical wavelength, and the tuning step accuracy is less than 1 MHz.

9. The cognitive communication system based on ultra-wideband photonic radio frequency transceiver according to claim 1, characterized in that, The digital signal processing module supports a data rate of more than 140 Mbps and outputs the eye diagram and IQ constellation diagram of the baseband signal.

10. A cognitive communication method using a cognitive communication system based on ultra-wideband photon radio frequency transceiver as described in any one of claims 1 to 9, characterized in that, Including the following steps: Real-time sense the electromagnetic environment and communication channel status through the spectrum sensing unit to generate spectrum situation information; Based on the spectrum situation information, use the intelligent cognitive communication decision-making module to generate a dynamic communication parameter configuration strategy, including the working frequency band, bandwidth, and data transmission rate; According to the configuration strategy, adjust the optical local oscillator frequency of the reconfigurable optical local oscillator generation module, and synchronously configure the parameters of the cognitive communication receiving end and the transmitting end; At the cognitive communication transmitter: A baseband signal is generated by a digital signal processing module and converted into an intermediate frequency analog signal. The intermediate frequency signal is modulated onto an optical carrier by a photonics radio frequency communication transmitter module, frequency-converted to the target radio frequency by a reconfigurable local oscillator, and then transmitted after being processed by a transmitting radio frequency processing module. At the cognitive communication receiver: The received radio frequency signal is preprocessed, then up-converted to an optical carrier by a photonics radio frequency communication receiver module, down-converted to an intermediate frequency by a reconfigurable local oscillator, and then the output intermediate frequency signal is processed by a photonics radio frequency communication receiver module to output a low intermediate frequency signal conducive to digital acquisition, which is finally input into a digital signal processing module.

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