阅读说明：本技术 微波光子射频认知系统 (Microwave photon radio frequency cognitive system ) 是由 朱丹 陈文娟 潘时龙 张博文 郭清水 叶星炜 谢晨旭 杨悦 刘江 雷震 于 2019-09-11 设计创作，主要内容包括：本发明公开了一种微波光子射频认知系统,包括：微波光子观察机,其包括微波光子物理环境观察机和微波光子频谱环境观察机,用于分别利用微波光子技术对物理环境以及频谱环境进行观测,并将观测信息反馈给认知决策机；认知决策机,用于对微波光子观察机观测的数据信息进行判断、识别；微波光子控制机,用于根据认知决策机的判断、识别结果,对微波光子执行机和微波光子观察机进行控制；微波光子执行机,用于根据微波光子控制机的控制命令执行相应任务,其至少包括微波光子成像跟踪模块、微波光子通信模块、微波光子干扰模块。本发明能实现复杂环境下的射频系统与环境的实时交互、智能感知、动态互答。(The invention discloses a microwave photon radio frequency cognitive system, which comprises: the microwave photon observer comprises a microwave photon physical environment observer and a microwave photon spectrum environment observer, and is used for observing a physical environment and a spectrum environment by using a microwave photon technology respectively and feeding observation information back to the cognitive decision machine; the cognitive decision machine is used for judging and identifying data information observed by the microwave photon observation machine; the microwave photon control machine is used for controlling the microwave photon execution machine and the microwave photon observation machine according to the judgment and identification results of the cognitive decision machine; the microwave photon execution machine is used for executing corresponding tasks according to the control command of the microwave photon control machine and at least comprises a microwave photon imaging tracking module, a microwave photon communication module and a microwave photon interference module. The invention can realize real-time interaction, intelligent sensing and dynamic interaction between the radio frequency system and the environment in a complex environment.)

1. A microwave photonic radio frequency cognitive system, comprising:

the microwave photon observer comprises a microwave photon physical environment observer and a microwave photon spectrum environment observer, and is used for observing a physical environment and a spectrum environment by using a microwave photon technology respectively and feeding observation information back to the cognitive decision machine;

the cognitive decision machine is used for judging and identifying data information observed by the microwave photon observation machine;

the microwave photon control machine is used for controlling the microwave photon execution machine and the microwave photon observation machine according to the judgment and identification results of the cognitive decision machine;

the microwave photon execution machine is used for executing corresponding tasks according to the control command of the microwave photon control machine, and at least comprises the following task modules: the system comprises a microwave photon imaging and tracking module for adaptive radar imaging and tracking, a microwave photon communication module for adaptive communication and a microwave photon interference module for adaptive interference.

2. The microwave photonic radio frequency cognitive system of claim 1, wherein the microwave photonic physical environment viewer comprises a transmitting module and a receiving module; the transmitting module includes:

the mode-locked laser is used for generating a multi-frequency optical signal;

the first port, the second port and the third port of the first circulator are respectively connected with the output end of the mode-locked laser, the output end of the DFB laser and the input end of the electric control variable optical attenuator;

the DFB laser is used for selecting a single-frequency signal with a certain comb frequency close to the mode frequency of the DFB laser from the multi-frequency signals generated by the mode-locked laser;

the electric control variable optical attenuator is used for controlling the intensity of the optical signal output by the third port of the first circulator so as to control the frequency of the generated microwave signal;

the intensity modulator is used for carrying out intensity modulation on an output optical signal of the electric control variable optical attenuator so as to control the waveform of the output signal;

the input end of the polarization controller is connected with the output end of the intensity modulator;

the first port, the second port and the third port of the second circulator are respectively connected with the output end of the polarization controller, the output end of the slave laser and the input end of the photoelectric detector;

a slave laser for generating an oscillation signal having a certain frequency offset with respect to the optical injection signal;

a photodetector for beating the optical signal output from the third port of the second circulator to generate a reconfigurable microwave signal;

the receiving module includes:

the optical domain deskewing unit is used for carrying out optical domain deskewing on the received echo signal by taking an optical signal output by a third port of the second circulator in the transmitting module as a reference;

the low-pass electric filter is used for performing low-pass filtering on the electric signal obtained after the optical domain is subjected to deskew;

and the analog-to-digital converter is used for performing analog-to-digital conversion on the low-pass filtered electric signal.

3. The microwave photonic radio frequency cognitive system of claim 1, wherein the microwave photonic spectrum environment viewer comprises:

the mode-locked laser is used for generating an optical pulse with a frequency domain showing as an optical frequency comb;

the positive dispersion optical fiber is used for performing time domain broadening on the optical pulse;

the electro-optical modulator is used for electro-optically modulating the optical pulse with the broadened time domain by using an environment echo signal;

the inverse dispersion optical fiber is used for performing time domain compression on the modulated optical signal output by the electro-optical modulator, and the output signal time domain waveform is the convolution of the input optical pulse and the signal Fourier transform;

the photoelectric detector is used for converting the optical signal after time domain compression into an electric signal;

and the analog-to-digital converter is used for performing analog-to-digital conversion on the converted electric signal.

4. The microwave photonic radio frequency cognitive system of claim 1, wherein the microwave photonic interference module comprises:

the laser is used for outputting optical carriers and dividing the optical carriers into two paths;

the dual-drive Mach-Zehnder modulator is used for modulating the working radio frequency signal and the single-frequency local oscillation signal of other equipment to one path of optical carrier by utilizing the upper arm and the lower arm of the dual-drive Mach-Zehnder modulator;

the first photoelectric detector is used for converting the modulated optical signals output by the dual-drive Mach-Zehnder modulator into electrical signals;

the digital radio frequency memory is used for storing intermediate frequency signals in the electric signals output by the first photoelectric detector;

the 90-degree electric bridge is used for converting the intermediate frequency signal and the single-frequency local oscillator signal output by the digital radio frequency memory into a pair of orthogonal I/Q signals;

the double-parallel Mach-Zehnder modulator is used for carrying out carrier suppression single-sideband modulation on the other path of optical carrier by the pair of orthogonal I/Q signals;

and the second photoelectric detector is used for converting the modulated optical signals output by the double parallel Mach-Zehnder modulators into electric signals so as to obtain reconstructed false signals of the working radio frequency signals of the other equipment.

5. The microwave photonic radio frequency cognitive system of claim 1, wherein the microwave photonic physical environment viewer, the microwave photonic imaging tracking module, and the microwave photonic communication module are multiplexed with one another.

6. The microwave photonic radio frequency cognitive system of claim 1, wherein each module in the system shares a transmitting antenna and a receiving antenna, and function switching of each module is realized by an electrically controlled switch.

7. The microwave photon radio frequency cognitive system according to claim 1, wherein the cognitive decision machine and the microwave photon control machine are implemented by a cognitive processor based on a priori knowledge and data fusion.