An external radiation source radar based on a Rydberg atom receiver

Abstract

The present invention discloses an external radiation source radar based on a Rydberg atom receiver, comprising: obtaining first signal information corresponding to a signal wave emitted by an external radiation source and second signal information corresponding to a signal wave reflected by a target object by using the external radiation source radar; performing signal intensity analysis and processing on the first signal information to obtain target microwave signal information; and performing analysis and calculation processing on the target microwave signal information, the first signal information, and the second signal information to obtain target position information.

Description

Technical Field

[0001] The present invention relates to the technical field of radar, and in particular, to an external radiation source radar based on a Rydberg atom receiver. Background Art

[0002] An external radiation source radar system is a bistatic radar under a special system. Its radiation source is a known-positioned radio and television transmitting station or other non-cooperative radio transmitting equipment. Its receiving station can receive the direct wave of the radiation source and the reflected echo of the target. Among various external radiation sources, the signal forms, transmission methods, and other parameters of civilian radio and television radiation sources are public, and the radiation power and coverage area are generally large. Moreover, most civilian radio and television signals are in low-frequency radio bands, with a large number of stations and a wide geographical distribution, having certain advantages in detecting stealth targets. Traditional antennas are affected by the antenna size effect when measuring such low-frequency signals and cannot be miniaturized. Therefore, an external radiation source radar based on a Rydberg atom receiver is provided to improve the detection accuracy and reliability of object targets based on external radiation sources, and further improve the ability to detect stealth object targets in a complex electromagnetic environment. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an external radiation source radar based on a Rydberg atom receiver, which is beneficial to improving the detection accuracy and reliability of object targets based on external radiation sources, and further improving the ability to detect stealth object targets in a complex electromagnetic environment.

[0004] To solve the above technical problem, a first aspect of an embodiment of the present invention discloses a signal processing method for an external radiation source radar, the method including:

[0005] Using the external radiation source radar to obtain first signal information corresponding to a signal wave emitted by the external radiation source and second signal information corresponding to the signal wave reflected by the target object;

[0006] Performing signal intensity analysis and processing on the first signal information to obtain target microwave signal information;

[0007] Performing analysis and calculation processing on the target microwave signal information, the first signal information, and the second signal information to obtain target position information.

[0008] A second aspect of an embodiment of the present invention discloses a signal processing device for an external radiation source radar, the device including:

[0009] An acquisition module, configured to use the external radiation source radar to obtain first signal information corresponding to a signal wave emitted by the external radiation source and second signal information corresponding to the signal wave reflected by the target object;

[0010] The first processing module is configured to perform signal strength analysis and processing on the first signal information to obtain target microwave signal information;

[0011] The second processing module is configured to perform analysis and calculation processing on the target microwave signal information, the first signal information, and the second signal information to obtain target position information.

[0012] A third aspect of the present invention discloses another signal processing device based on an external radiation source radar. The device includes:

[0013] A memory storing executable program code;

[0014] A processor coupled to the memory;

[0015] The processor calls the executable program code stored in the memory and executes some or all of the steps in the signal processing method based on an external radiation source radar disclosed in the first aspect of the embodiments of the present invention.

[0016] A fourth aspect of the present invention discloses a computer-readable storage medium. The computer-readable storage medium stores computer instructions, which are used to execute some or all of the steps in the signal processing method based on an external radiation source radar disclosed in the first aspect of the embodiments of the present invention when the computer instructions are called. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic diagram of the scenario of the signal processing system based on an external radiation source radar provided by the embodiments of the present invention;

[0019] Figure 2 It is a schematic flowchart of a signal processing method based on an external radiation source radar disclosed in the embodiments of the present invention;

[0020] Figure 3 It is a schematic structural diagram of a signal processing device based on an external radiation source radar disclosed in the embodiments of the present invention;

[0021] Figure 4 It is a schematic structural diagram of another signal processing device based on an external radiation source radar disclosed in the embodiments of the present invention;

[0022] Figure 5 It is a schematic structural diagram of a signal optimization model disclosed in the embodiments of the present invention;

[0023] Figure 6 It is a schematic diagram of the operation of a radiation source radar based on a Rydberg atom receiver disclosed in an embodiment of the present invention. Detailed implementation manners

[0024] In order to enable those skilled in the art to better understand the solution of the present invention, 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. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0025] The terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, device, product or equipment that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or equipment.

[0026] Referring to "embodiments" herein means that a particular feature, structure or characteristic described in connection with the embodiments can be included in at least one embodiment of the present invention. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0027] In this application, the term "exemplary" is used to mean "serving as an example, illustration, or description". Any embodiment described as "exemplary" in this application is not necessarily to be construed as more preferred or more advantageous than other embodiments. In order for any person skilled in the art to implement and use this application, the following description is given. In the following description, details are set forth for the purpose of explanation. It should be understood that those of ordinary skill in the art can recognize that this application can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid unnecessary details from obscuring the description of this application. Therefore, this application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed in this application.

[0028] It should be noted that since the method of the embodiment of the present application is executed in a computer device, the processing objects of each computer device exist in the form of data or information. For example, time, which is actually time information. It can be understood that in subsequent embodiments, if dimensions, quantities, positions, etc. are mentioned, they are all corresponding data existences for the computer device to process, and specific details are not elaborated here.

[0029] It should be noted that a brief introduction to the artificial intelligence-related technologies that may be involved in the present application is given. Artificial Intelligence (AI) is the theory, method, technology, and application system that uses digital computers or machines controlled by digital computers to simulate, extend, and expand human intelligence, perceive the environment, acquire knowledge, and use knowledge to obtain the best results. In other words, artificial intelligence is a comprehensive technology in computer science that attempts to understand the essence of intelligence and produce a new intelligent machine that can react in a way similar to human intelligence. Artificial intelligence is also the study of the design principles and implementation methods of various intelligent machines, enabling the machines to have the functions of perception, reasoning, and decision-making.

[0030] Artificial intelligence technology is an interdisciplinary subject with a wide range of fields, including both hardware-level technologies and software-level technologies. The basic technologies of artificial intelligence generally include technologies such as sensors, dedicated artificial intelligence chips, cloud computing, distributed storage, big data processing technology, operation / interaction systems, mechatronics, etc. The software technologies of artificial intelligence mainly include several major directions such as computer vision technology, speech processing technology, natural language processing technology, and machine learning / deep learning.

[0031] Computer Vision Technology (CV) Computer vision is a science that studies how to make machines "see". Further, it refers to using cameras and computers to replace human eyes to identify and measure targets, etc., which is machine vision, and further performing graphic processing to make the computer-processed images more suitable for human eyes to observe or be transmitted to instruments for detection. As a scientific discipline, computer vision studies related theories and technologies and attempts to establish an artificial intelligence system that can obtain information from images or multi-dimensional data. Computer vision technology usually includes technologies such as image processing, image recognition, image semantic understanding, image retrieval, OCR, video processing, video semantic understanding, video content / behavior recognition, three-dimensional object reconstruction, 3D technology, virtual reality, augmented reality, simultaneous localization and mapping, etc., and also includes common biometric recognition technologies such as face recognition and fingerprint recognition.

[0032] Unimodal information is data of only one type, such as one of the data information like text, image, audio, video, electromagnetic signal, etc. Multimodal information is data information that includes at least two types of unimodal information. Further, multimodal information is applicable to complex tasks that require integrating multiple information sources, such as sentiment analysis, robot interaction, autonomous driving, etc. By integrating information of multiple modalities, higher performance and accuracy can usually be achieved in tasks.

[0033] A large model refers to an artificial neural network model with a very large number of parameters. In the field of artificial intelligence, a large model usually refers to a model with hundreds of millions to trillions of parameters. The model usually needs to be trained on a large-scale dataset and requires a large amount of computing resources for optimization and adjustment. Large models are usually used to solve complex natural language processing, computer vision, speech recognition and other tasks. Generative AI is a type of AI that can create new content and ideas, including conversations, stories, images, videos and music. In the embodiments of this application, the large model can be large language models such as ChatGPT, BERT, XLNet, Zhipu Model, Claude, Moonshot AI Model, ChatGLM Model, Qianyitongwen Model, MiniMax Model, Spark Model, Llama Model, 360GPT Model, Qwen Model, Baichuan Model, Lark Model, vivoLM Model and Wenxin Yiyan, and the embodiments of this application do not make limitations.

[0034] The embodiments of this application provide a signal processing method, device, computer device and computer-readable storage medium based on an external radiation source radar, which will be described in detail below respectively.

[0035] Please refer to Figure 1 , Figure 1 which is a schematic diagram of the scenario of the signal processing system based on an external radiation source radar provided by the embodiments of this application. The signal processing system based on an external radiation source radar may include a computer device 100, and a signal processing device based on an external radiation source radar is integrated in the computer device 100, such as Figure 1 the computer device in

[0036] In the embodiments of this application, the computer device 100 is mainly used to obtain the first signal information corresponding to the signal wave emitted by the external radiation source and the second signal information corresponding to the signal wave reflected by the target object by using the external radiation source radar;

[0037] perform signal intensity analysis and processing on the first signal information to obtain target microwave signal information;

[0038] perform analysis and calculation processing on the target microwave signal information, the first signal information and the second signal information to obtain target position information.

[0039] It can improve the detection accuracy and reliability of object detection based on external radiation sources, and further improve the ability to detect stealth object targets in complex electromagnetic environments.

[0040] In the embodiments of the present application, the computer device 100 can be an independent server or a server network or server cluster composed of servers. For example, the computer device 100 described in the embodiments of the present application includes, but is not limited to, a computer, a network host, a single network server, a set of multiple network servers, or a cloud server composed of multiple servers. Among them, the cloud server is composed of a large number of computers or network servers based on cloud computing.

[0041] It can be understood that the computer device 100 used in the embodiments of the present application can be a device that includes both receiving and transmitting hardware, that is, a device having receiving and transmitting hardware capable of performing two-way communication on a two-way communication link. Such devices can include: cellular or other communication devices, which have a single-line display or a multi-line display or cellular or other communication devices without a multi-line display. Specifically, the computer device 100 can be a desktop terminal or a mobile terminal, and the computer device 100 can specifically also be one of a mobile phone, a tablet computer, a laptop computer, etc.

[0042] Those skilled in the art can understand that Figure 1 the application environment shown in Figure 1 is only one application scenario of the solution of the present application and does not constitute a limitation on the application scenario of the solution of the present application. Other application environments can also include more or fewer computer devices than Figure 1 shown in

[0043] For example, Figure 1 as shown in

[0044] it is shown that the signal processing system based on external radiation source radar can also include a memory 200 for storing data, such as image data, location information, etc. Figure 1 It should be noted that

[0045] the scene schematic diagram of the signal processing system based on external radiation source radar shown in

[0045] The present invention discloses an external radiation source radar based on a Rydberg atom receiver, which is beneficial to improving the detection accuracy and reliability of object detection based on an external radiation source, and further improving the ability to detect stealth object targets in a complex electromagnetic environment. The following will be described in detail respectively.

[0046] Embodiment 1

[0047] Please refer to Figure 2 , Figure 2 which is a schematic flowchart of a signal processing method for an external radiation source radar disclosed in an embodiment of the present invention. Among them, Figure 2 the described signal processing method for an external radiation source radar is applied in a management system, such as a local server or a cloud server for management, etc., and the embodiments of the present invention do not make limitations. As Figure 2 shown, the signal processing method for an external radiation source radar may include the following operations:

[0048] 101. Use an external radiation source radar to obtain first signal information corresponding to a signal wave emitted by the external radiation source and second signal information corresponding to a signal wave reflected by the target object.

[0049] 102. Perform signal intensity analysis and processing on the first signal information to obtain target microwave signal information.

[0050] 103. Perform analysis and calculation processing on the target microwave signal information, the first signal information, and the second signal information to obtain target position information.

[0051] It should be noted that the above external radiation source radar has the advantages of being tunable, anti-interference, independent of measurement results from size, and easy to miniaturize, and has certain advantages in detecting stealth object targets in a complex electromagnetic environment. The microwave electric field measurement method based on Rydberg atoms has the following advantages: (1) Self-calibration using atomic parameters can be traced back to basic physical quantities, and the results are directly benchmarked against the International System of Units; (2) The theoretical limit sensitivity is only limited by quantum projection noise, the device sensitivity is high and independent of size, and it is easy to achieve miniaturization and integration; (3) All-optical detection can be realized, with little influence on the measured electromagnetic field and anti-electromagnetic interference ability. The Rydberg atom receiver can already measure the frequency, intensity, phase, and azimuth angle of the incident microwave. The external radiation source radar based on the Rydberg atom receiver has the transceiver separated, with good anti-interference, anti-radiation weapon, anti-stealth target, and anti-low-altitude penetration performance. Using Rydberg atoms as the receiving station of the external radiation source radar can better solve the problem of the influence of antenna size effect when measuring low-frequency long-wave signals by traditional antennas, and realize a miniaturized external radiation source radar. The external radiation source radar based on the Rydberg atom receiver is easy to conceal, and at the same time has the potential for multi-base and low-frequency anti-stealth. Making full use of such electromagnetic resources to form a networked regional early warning system has important and far-reaching significance.

[0052] It should be noted that the external radiation source radar includes two parts: a receiving station and a transmitting station. The signal receiving station is composed of a Rydberg atom receiving mechanism, and the transmitting station is a non-cooperative opportunistic illumination source that can emit various broadcast signals such as frequency modulation broadcast signals, analog TV signals, mobile communication signals, or navigation satellite signals as external radiation source signals. The position of the external radiation source transmitting station and the frequency of the external radiation source signal are publicly known, and the external radiation source transmitting station and the signal receiving station are located in different places. The Rydberg atom receiver mainly consists of structural units such as a Rydberg atom gas cell, a detection laser, a coupling laser, a local oscillator microwave source, and a photodetector. It can receive direct microwaves and target echoes, and can give the frequency difference and phase difference between the two microwave beams. Moreover, it can give the incident azimuth angle of the target echo when the position of the external radiation source or the incident azimuth angle of the direct microwave is known. The Rydberg atom gas cell is filled with alkali metal or alkaline earth metal atom gases such as rubidium atoms, cesium atoms, or strontium atoms. The atom gas cell is made of transparent materials such as glass, which can enable the laser and microwave to pass through the transparent material and interact with the Rydberg atoms in the atom gas cell. For example Figure 6As shown, the implementation method of an external radiation source radar based on a Rydberg atom receiver can use the direct microwave as the local oscillator microwave of the atom receiver and the target echo as the signal microwave of the atom receiver when the direct microwave is strong; the moving speed of the target, the distance between the target and the radar transceiver station can be obtained according to the frequency and phase of the mixed signal; the frequency of the target echo can be obtained according to the known direct microwave frequency; according to the known direct microwave frequency and incident azimuth angle, the frequency and incident azimuth angle of the target echo can be obtained; since the direct microwave and the target echo emitted from the same radiation source are correlated, the clutter interference can be reduced when the two microwaves are mixed. The implementation method of an external radiation source radar based on a Rydberg atom receiver can use the direct wave and the target echo as the signal microwaves of two sets of atom receivers respectively and use the local oscillator microwave source to provide the local oscillator microwave when the direct wave signal emitted by the external radiation source is weak; the frequency, intensity, and incident azimuth angle of the local oscillator microwave emitted by the local oscillator microwave source are known and adjustable, and the local oscillator microwaves received by the two sets of Rydberg atom receivers are synchronized by the atomic clock signal, so that the frequency, intensity, and phase information of the direct wave and the target echo can be obtained respectively from the mixed signals of the two sets of Rydberg atom receivers, and then the moving speed of the target, the distance between the target and the radar transceiver station can be obtained; according to the known frequencies and incident azimuth angles of the direct microwave and the local oscillator microwave, and the measured target echo frequency, the incident azimuth angle of the target echo can be obtained according to the phase of the mixed signal. The implementation method of an external radiation source radar based on a Rydberg atom receiver can give the moving speed and position information of the target based on the measured target echo azimuth angle, the frequency difference between the target echo and the direct microwave, and the phase difference between the target echo and the direct microwave, given the position of the external radiation source, the direct microwave frequency, and the azimuth angle. When the intensity of the direct microwave emitted by the external radiation source is strong, the direct microwave is used as the local oscillator microwave of the atom receiver, and the target echo is used as the signal microwave of the atom receiver. The frequency of the mixed signal corresponds to the frequency difference between the direct microwave and the target echo, and the phase of the mixed signal corresponds to the phase difference between the direct microwave and the target echo. Since the position of the external radiation source and the frequency of the direct wave are publicly known, the incident azimuth angle of the direct wave and the frequency of the target echo can be calculated. Regarding the direct microwave and the target echo as plane waves, the incident azimuth angle of the target echo can be obtained. The present invention gives the frequency difference and phase difference between the direct microwave and the target echo, as well as the incident azimuth angle of the target echo, and then the moving speed and position information of the target can be calculated. When the intensity of the direct microwave emitted by the external radiation source is weak, the direct microwave and the target echo are used as the signal microwaves of the Rydberg atom receiver, and the local oscillator microwave source provides the local oscillator microwave for the Rydberg atom receiver. The mixing results of the two Rydberg atom receivers can give the frequency difference, phase difference between the direct microwave and the target echo, as well as the incident azimuth angle of the target echo, and then the moving speed and position information of the target can be calculated.In the process of signal processing, it is necessary to purify the signal of the reference channel and then suppress the clutter of the echo channel signal; using the preprocessed signal, a signal model can be established, and further joint processing of range-Doppler-angle can be performed using matched filtering or compressive sensing methods; after predicting the range, Doppler, and angle, a hypothesis testing problem can be further constructed to detect a moving target and estimate the parameters of interest; thus, the positioning and tracking of the target can be achieved. When the intensity of the direct microwave emitted by the external radiation source is weak, it is necessary to perform joint target positioning and tracking on the basis of the above signal processing. In this case, since the local oscillator microwave source is known, the clutter suppression process is theoretically more accurate. Using the preprocessed signal, a signal model can be established, and further joint processing of range-Doppler-angle can be performed using matched filtering or compressive sensing methods; after predicting the range, Doppler, and angle, a hypothesis testing problem can be further constructed to detect a moving target and estimate the parameters of interest; the positioning and tracking of the target can be achieved, thus realizing the joint target positioning and tracking.

[0053] It should be noted that the signal processing of the external radiation source radar of the present application realizes the frequency modulation of the external radiation radar based on the Rydberg atom receiver by adjusting the laser and the local oscillator microwave, and has the advantages of large working bandwidth and easy frequency modulation. The present application can directly receive the direct microwave and the target echo through the Rydberg atom receiver when the direct wave is strong, avoiding the disadvantage that the traditional external radiation source radar based on antennas must use two channels to process the direct wave and the target echo respectively, and the signal processing process is simpler. The theoretical limit sensitivity of the present application is only limited by the quantum projection noise, the device sensitivity is high and independent of the size, and it is not affected by the traditional antenna half-wave size effect. The present application uses the Rydberg atom receiver as the receiving station of the external radiation source radar. The Rydberg atom receiver has little influence on the measured electromagnetic field and has anti-interference ability. This microwave measurement technology based on quantum effects has the advantages of ultra-sensitivity, ultra-high speed, anti-interference, anti-damage, and self-calibration. The present application uses a known-position broadcast television transmitter or other non-cooperative radio transmitting equipment as the external radiation source, and the radar transceiver stations are separated, which has good anti-interference, anti-anti-radiation, and is easy to hide, and at the same time has the anti-stealth potential of multi-base and low-frequency bands.

[0054] It should be noted that the object of the present application is an object flying in the air, such as a drone, etc., and the embodiments of the present invention are not limited thereto.

[0055] It can be seen that implementing the signal processing method based on the external radiation source radar described in the embodiments of the present invention is beneficial to improving the detection accuracy and reliability of the object based on the external radiation source, and further improving the ability to detect stealth object targets in a complex electromagnetic environment.

[0056] In an optional embodiment, the above analysis, calculation, and processing of the target microwave signal information, the first signal information, and the second signal information to obtain the target position information include:

[0057] Performing optimization processing on the target microwave signal information to obtain optimized microwave signal information;

[0058] Based on the optimized microwave signal information, the first signal information, and the second signal information, determining the target position information.

[0059] It should be noted that the above optimization processing of the target microwave signal information to obtain the optimized microwave signal information is processed using a signal optimization model. Further, as Figure 5 shown, the above signal optimization model includes a first convolution module, a second convolution module, a third convolution module, a third convolution module, a fourth convolution module, a fifth convolution module, a sixth convolution module, a first pooling module, a second pooling module, a third pooling module, a first connection module, a second connection module, a third connection module, and an activation module; wherein,

[0060] The input end of the first convolution module is configured to receive the model input information of the signal optimization model, and the output end of the first convolution module is connected to the input end of the first pooling module; the output end of the first pooling module is connected to the input end of the second convolution module; the output end of the second convolution module is connected to the input end of the second pooling module; the output end of the second pooling module is connected to the input end of the third convolution module; the output end of the third convolution module is connected to the input end of the fourth convolution module; the output end of the fourth convolution module is connected to the input end of the fifth convolution module; the output end of the fifth convolution module is connected to the input end of the third pooling module; the output end of the third pooling module is connected to the input end of the sixth convolution module; the output end of the sixth convolution module is respectively connected to the input end of the first connection module and the input end of the third connection module; the output end of the first connection module is connected to the input end of the second connection module; the output end of the second connection module is connected to the input end of the third connection module; the output end of the third connection module is connected to the input end of the activation module; the output end of the activation module is configured to output the model output information of the signal optimization model.

[0061] It should be noted that the training function of the above signal optimization model is the cross-entropy function, the initial learning rate is 0.0001, the learning decay rate is 0.99, the training times threshold is 50, and the single training sample is 40. The embodiments of the present invention are not limited thereto.

[0062] It should be noted that the above first pooling module, second pooling module, and third pooling module are constructed based on the maximum pooling layer. The embodiments of the present invention are not limited thereto.

[0063] It should be noted that the above activation module is constructed based on the ReLu activation function. The embodiments of the present invention are not limited thereto.

[0064] It should be noted that the convolution kernel size of the above first convolution module is 11×11, the convolution kernel sizes of the second convolution module, the third convolution module, and the third convolution module are 5×5, and the convolution kernel sizes of the fourth convolution module, the fifth convolution module, and the sixth convolution module are 3×3. The number of channels is 3, 64, 64, 192, 384, and 256 respectively, and the stride is 4. The embodiments of the present invention are not limited thereto.

[0065] It should be noted that the above signal optimization model has multiple convolution layers with different convolution kernel sizes, data augmentation characteristics, and fully connected layers, and has excellent local feature capture ability, which is more conducive to signal recognition and purification of external radiation source radars. The embodiments of the present invention are not limited thereto.

[0066] It can be seen that implementing the signal processing method based on an external radiation source radar described in the embodiments of the present invention is beneficial to improving the detection accuracy and reliability of object targets based on external radiation sources, and further improving the ability to detect stealth object targets in a complex electromagnetic environment.

[0067] In another optional embodiment, based on the optimized microwave signal information, the first signal information, and the second signal information, determining the target position information includes:

[0068] Filtering the second signal information using the optimized microwave signal information to obtain second filtered signal information;

[0069] When the target microwave signal information is the first signal information, determining the target position information based on the optimized microwave signal information and the second filtered signal information;

[0070] When the target microwave signal information is not the first signal information, determining the target position information based on the optimized microwave signal information, the first signal information, and the second filtered signal information.

[0071] It should be noted that the above determining the target position information based on the optimized microwave signal information and the second filtered signal information may perform joint processing of range-Doppler-angle using a matched filtering or compressive sensing method to obtain the position information of the object target relative to the external radiation source, and then based on the known position information of the external radiation source, the actual position information of the object target at the current moment can be obtained. The embodiments of the present invention are not limited thereto.

[0072] It can be seen that implementing the signal processing method based on an external radiation source radar described in the embodiments of the present invention is beneficial to improving the detection accuracy and reliability of object targets based on external radiation sources, and further improving the ability to detect stealth object targets in a complex electromagnetic environment.

[0073] In yet another alternative embodiment, based on the optimized microwave signal information, the first signal information, and the second filtered signal information, the target position information is determined, including:

[0074] Filter the first signal information using the optimized microwave signal information to obtain the first filtered signal information;

[0075] Based on the optimized microwave signal information and the first filtered signal information, determine the first position information;

[0076] Based on the optimized microwave signal information and the second filtered signal information, determine the second position information;

[0077] Perform analysis and calculation processing on the first position information and the second position information to obtain the target position information.

[0078] It should be noted that the processing method of filtering the first signal information using the optimized microwave signal information is the same as that of filtering the second signal information using the optimized microwave signal information, and the embodiments of the present invention do not make any limitations.

[0079] It should be noted that the processing methods based on the optimized microwave signal information and the first filtered signal information and based on the optimized microwave signal information and the second filtered signal information are the same as those based on the optimized microwave signal information and the second filtered signal information, and the embodiments of the present invention do not make any limitations.

[0080] It should be noted that the above analysis and calculation processing of the first position information and the second position information first calculates the position of the external radiation source radar through the first position information (i.e., the position of the external radiation source radar relative to the external radiation source), and then calculates the target position information of the object through the second position information (i.e., the position of the object relative to the external radiation source radar), and the embodiments of the present invention do not make any limitations.

[0081] It can be seen that implementing the signal processing method based on the external radiation source radar described in the embodiments of the present invention is beneficial to improving the detection accuracy and reliability of object detection based on the external radiation source, and further improving the ability to detect stealth objects in a complex electromagnetic environment.

[0082] In yet another alternative embodiment, filtering the second signal information using the optimized microwave signal information to obtain the second filtered signal information includes:

[0083] Perform Fourier transforms on the optimized microwave signal information and the second signal information respectively to obtain the first transformed signal information and the second transformed signal information;

[0084] Perform calculation processing on the first transformed signal information and the second transformed signal information to obtain the third transformed signal information;

[0085] Perform an inverse Fourier transform on the third transformed signal information to obtain the second filtered signal information.

[0086] It should be noted that the above-mentioned Fourier transforms on the optimized microwave signal information and the second signal information respectively are to convert the time-domain signal into the frequency-domain signal for the convenience of the next calculation and processing, which is not limited in the embodiments of the present invention.

[0087] It should be noted that the above-mentioned inverse Fourier transform on the third transformed signal information is to convert the frequency-domain signal back into the time-domain signal, which is convenient for subsequent further position information, and is not limited in the embodiments of the present invention.

[0088] It should be noted that the above-mentioned calculation and processing of the first transformed signal information and the second transformed signal information can be implemented based on the ECA-B algorithm, which is not limited in the embodiments of the present invention.

[0089] It can be seen that implementing the signal processing method based on the external radiation source radar described in the embodiments of the present invention is beneficial to improving the detection accuracy and reliability of object targets based on external radiation sources, and further improving the ability to detect stealth object targets in a complex electromagnetic environment.

[0090] In an alternative embodiment, the above-mentioned signal intensity analysis and processing of the first signal information to obtain the target microwave signal information includes:

[0091] Perform normalization processing on the signal power information in the first signal information to obtain the standard power information;

[0092] Use the intensity calculation model to perform calculation and processing on the standard power information to obtain the power intensity value;

[0093] Among them, the intensity calculation model is:

[0094] X = a·log 10 (Y);

[0095] In the formula, X represents the power intensity value; Y represents the standard power information; a represents the calculation coefficient;

[0096] Judge whether the power intensity value is greater than or equal to the intensity threshold to obtain the threshold judgment result;

[0097] When the threshold judgment result is yes, determine the first signal information as the target microwave signal information;

[0098] When the threshold judgment result is no, determine the third signal information generated by the external radiation source radar as the target microwave signal information.

[0099] It should be noted that the above intensity threshold can be set by the user, or can be the default value given by the system, or can be the average of historical intensity thresholds. The embodiments of the present invention do not make any limitations. Further, the above intensity threshold is a positive number not less than 1, and the embodiments of the present invention do not make any limitations.

[0100] It should be noted that the above normalization process of the signal power information in the first signal information is to convert the signal power information into mW and divide it by 1 mW, so as to achieve its dimensionless, obtain pure digital information, and facilitate subsequent calculation and analysis. The embodiments of the present invention do not make any limitations.

[0101] It should be noted that when the direct microwave electric field intensity emitted by the external radiation source is strong (the power intensity value is greater than or equal to the intensity threshold), the direct wave (the first signal information) can be directly used as the target microwave signal information, and the frequency and incident azimuth angle of the direct wave can be obtained according to the public information of the external radiation source; when the direct microwave electric field intensity emitted by the external radiation source is weak (the power intensity value is less than the intensity threshold), the local oscillator microwave (the third signal information) generated by the local oscillator microwave source can be used as the target microwave signal information, and the local oscillator microwave source can be synchronized with the external radiation source by two atomic clocks that have been synchronized in advance. The embodiments of the present invention do not make any limitations. Further, the frequency and azimuth angle of the local oscillator microwave are known, and its polarization direction is parallel to the polarization directions of the probe laser and the coupling laser. The embodiments of the present invention do not make any limitations. The signal microwave and the local oscillator microwave are irradiated onto the same atomic gas cell, and the polarization direction of the signal microwave is parallel to the polarization direction of the local oscillator microwave. Inside the atomic gas cell, four-wave mixing occurs among the probe light, the coupling light, the local oscillator microwave, and the signal microwave, resulting in a change in the transmittance of the probe light over time. The photodetector is used to measure the light intensity of the probe light passing through the atomic gas cell, and the mixing signal of the local oscillator microwave and the signal microwave at the Rydberg atom receiver is given according to the change in the light intensity. The frequency of the mixing signal is the frequency difference between the local oscillator microwave and the signal microwave, and the phase of the mixing signal is the phase difference between the local oscillator microwave and the signal microwave. According to the known frequency of the local oscillator microwave, the frequency and wavelength of the signal microwave are calculated.

[0102] It should be noted that the above calculation coefficient can be set by the user, or can be the default value given by the system, or can be the average of historical calculation coefficients. The embodiments of the present invention do not make any limitations. Further, the above calculation coefficient is a positive number not less than 8, and the embodiments of the present invention do not make any limitations.

[0103] It can be seen that implementing the signal processing method based on the external radiation source radar described in the embodiments of the present invention is beneficial to improving the detection accuracy and reliability of object detection based on the external radiation source, and further improving the ability to detect stealth object targets in a complex electromagnetic environment.

[0104] In another alternative embodiment, the external radiation source radar includes a Rydberg atomic cell, a detection laser, a coupling laser, a local oscillator microwave source, and a photodetector; wherein,

[0105] The detection laser and the photodetector are oppositely arranged with respect to the Rydberg atomic cell;

[0106] The coupling laser and the photodetector are arranged on the same side of the Rydberg atomic cell;

[0107] The Rydberg atomic cell is made of a transparent material, and a Rydberg state atomic gas is placed in the Rydberg atomic cell;

[0108] The coupling laser generates coupling laser light;

[0109] The detection laser light generated by the detection laser passes through the Rydberg atomic cell and is detected by the photodetector to obtain first signal and second signal information;

[0110] The coupling laser light and the detection laser light propagate in opposite directions in the Rydberg atomic cell; the polarization direction of the coupling laser light and the polarization direction of the detection laser light are parallel to each other;

[0111] The local oscillator microwave source is used to generate local oscillator microwaves to be detected by the photodetector to obtain third signal information.

[0112] It should be noted that the atoms in the Rydberg state atomic gas include, but are not limited to, alkali metal atoms or alkaline earth metal atoms such as rubidium atoms, cesium atoms, and strontium atoms, and the embodiments of the present invention are not limited thereto. Further, the detection method of Rydberg atoms is based on the change of atomic energy levels, so detection can be achieved without physical contact, thereby avoiding electromagnetic interference and physical contact in certain scenarios, having better concealment, being able to effectively utilize the existing electromagnetic environment, and not causing electromagnetic pollution to the environment; at the same time, the external radiation source radar has low research and development costs, a small device volume, and strong mobility, and the embodiments of the present invention are not limited thereto.

[0113] It should be noted that the material for manufacturing the Rydberg atomic cell can be a transparent material such as glass, so that the laser light and microwaves can pass through the transparent material and interact with the Rydberg atoms in the atomic cell, and the embodiments of the present invention are not limited thereto.

[0114] It should be noted that the above-mentioned coupling laser light is used for operations such as pumping, cooling, and exciting atoms, and the embodiments of the present invention are not limited thereto.

[0115] It should be noted that by adjusting parameters such as the intensity and frequency of the detection laser light and the coupling laser light, the frequency range of the microwave radar signal that the external radiation source radar can measure can be adjusted, and the measurement sensitivity and measurement bandwidth can be optimized, and the embodiments of the present invention are not limited thereto.

[0116] It can be seen that implementing the signal processing method based on an external radiation source radar described in the embodiments of the present invention is conducive to improving the detection accuracy and reliability of object targets based on external radiation sources, and further improving the ability to detect stealth object targets in a complex electromagnetic environment.

[0117] Embodiment 2

[0118] Please refer to Figure 3 , Figure 3 which is a schematic structural diagram of a signal processing device based on an external radiation source radar disclosed in the embodiments of the present invention. Among them, Figure 3 the described device can be applied to a management system, such as a local server or a cloud server for management, etc., which is not limited in the embodiments of the present invention. As Figure 3 shown, the device may include:

[0119] An acquisition module 201, configured to use an external radiation source radar to acquire first signal information corresponding to a signal wave emitted by an external radiation source and second signal information corresponding to a signal wave reflected by a target object;

[0120] A first processing module 202, configured to perform signal intensity analysis processing on the first signal information to obtain target microwave signal information;

[0121] A second processing module 203, configured to perform analysis and calculation processing on the target microwave signal information, the first signal information, and the second signal information to obtain target position information.

[0122] It can be seen that implementing Figure 3 the signal processing device based on an external radiation source radar described is conducive to improving the detection accuracy and reliability of object targets based on external radiation sources, and further improving the ability to detect stealth object targets in a complex electromagnetic environment.

[0123] In another optional embodiment, as Figure 3 shown, the first processing module 202 performs analysis and calculation processing on the target microwave signal information, the first signal information, and the second signal information to obtain target position information, including:

[0124] Performing optimization processing on the target microwave signal information to obtain optimized microwave signal information;

[0125] Based on the optimized microwave signal information, the first signal information, and the second signal information, determining the target position information.

[0126] It can be seen that implementing Figure 3 the signal processing device based on an external radiation source radar described is conducive to improving the detection accuracy and reliability of object targets based on external radiation sources, and further improving the ability to detect stealth object targets in a complex electromagnetic environment.

[0127] In yet another alternative embodiment, as Figure 3 shown, the first processing module 202 determines target position information based on the optimized microwave signal information, the first signal information, and the second signal information, including:

[0128] Filter the second signal information using the optimized microwave signal information to obtain second filtered signal information;

[0129] When the target microwave signal information is the first signal information, determine the target position information based on the optimized microwave signal information and the second filtered signal information;

[0130] When the target microwave signal information is not the first signal information, determine the target position information based on the optimized microwave signal information, the first signal information, and the second filtered signal information.

[0131] It can be seen that implementing Figure 3 the described signal processing device based on an external radiation source radar is beneficial to improving the detection accuracy and reliability of object targets based on an external radiation source, and further improving the ability to detect stealth object targets in a complex electromagnetic environment.

[0132] In yet another alternative embodiment, as Figure 3 shown, the first processing module 202 determines target position information based on the optimized microwave signal information, the first signal information, and the second filtered signal information, including:

[0133] Filter the first signal information using the optimized microwave signal information to obtain first filtered signal information;

[0134] Determine the first position information based on the optimized microwave signal information and the first filtered signal information;

[0135] Determine the second position information based on the optimized microwave signal information and the second filtered signal information;

[0136] Perform analysis and calculation processing on the first position information and the second position information to obtain the target position information.

[0137] It can be seen that implementing Figure 3 the described signal processing device based on an external radiation source radar is beneficial to improving the detection accuracy and reliability of object targets based on an external radiation source, and further improving the ability to detect stealth object targets in a complex electromagnetic environment.

[0138] In yet another alternative embodiment, as Figure 3 shown, the first processing module 202 filters the second signal information using the optimized microwave signal information to obtain second filtered signal information, including:

[0139] Perform Fourier transforms on the optimized microwave signal information and the second signal information respectively to obtain a first transformed signal information and a second transformed signal information;

[0140] Perform calculation processing on the first transformed signal information and the second transformed signal information to obtain a third transformed signal information;

[0141] Perform an inverse Fourier transform process on the third transformed signal information to obtain a second filtered signal information.

[0142] It can be seen that implementing Figure 3 the described signal processing device based on an external radiation source radar is beneficial to improving the detection accuracy and reliability of object targets based on an external radiation source, and further improving the ability to detect stealth object targets in a complex electromagnetic environment.

[0143] In another alternative embodiment, as Figure 3 shown, the second processing module 203 performs signal strength analysis processing on the first signal information to obtain target microwave signal information, including:

[0144] Perform normalization processing on the signal power information in the first signal information to obtain standard power information;

[0145] Use an intensity calculation model to perform calculation processing on the standard power information to obtain a power intensity value;

[0146] Among them, the intensity calculation model is:

[0147] X = a·log 10 (Y);

[0148] In the formula, X represents the power intensity value; Y represents the standard power information; a represents the calculation coefficient;

[0149] Judge whether the power intensity value is greater than or equal to the intensity threshold to obtain a threshold judgment result;

[0150] When the threshold judgment result is yes, determine the first signal information as the target microwave signal information;

[0151] When the threshold judgment result is no, determine the third signal information generated by the external radiation source radar as the target microwave signal information.

[0152] It can be seen that implementing Figure 3 the described signal processing device based on an external radiation source radar is beneficial to improving the detection accuracy and reliability of object targets based on an external radiation source, and further improving the ability to detect stealth object targets in a complex electromagnetic environment.

[0153] In another alternative embodiment, as Figure 3As shown in the figure, the external radiation source radar includes a Rydberg atomic cell, a detection laser, a coupling laser, a local oscillator microwave source, and a photodetector; among them,

[0154] The detection laser and the photodetector are oppositely arranged with respect to the Rydberg atomic cell;

[0155] The coupling laser and the photodetector are arranged on the same side of the Rydberg atomic cell;

[0156] The Rydberg atomic cell is made of a transparent material, and a Rydberg state atomic gas is placed in the Rydberg atomic cell;

[0157] The coupling laser generates coupling laser light;

[0158] The detection laser light generated by the detection laser passes through the Rydberg atomic cell and is detected by the photodetector to obtain first signal and second signal information;

[0159] The coupling laser light and the detection laser light propagate in opposite directions in the Rydberg atomic cell; the polarization direction of the coupling laser light and the polarization direction of the detection laser light are parallel to each other;

[0160] The local oscillator microwave source is used to generate local oscillator microwaves to be detected by the photodetector to obtain third signal information.

[0161] It can be seen that implementing Figure 3 The described signal processing device based on the external radiation source radar is beneficial to improving the detection accuracy and reliability of object detection based on the external radiation source, and further improving the ability to detect stealth object targets in a complex electromagnetic environment.

[0162] Embodiment III

[0163] Please refer to Figure 4 , Figure 4 which is a schematic structural diagram of another signal processing device based on the external radiation source radar disclosed in the embodiments of the present invention. Among them, Figure 4 The described device can be applied to a management system, such as a local server or a cloud server for management, etc., which is not limited in the embodiments of the present invention. As Figure 4 shown, the device may include:

[0164] A memory 301 storing executable program code;

[0165] A processor 302 coupled to the memory 301;

[0166] The processor 302 calls the executable program code stored in the memory 301 to execute the steps in the signal processing method based on the external radiation source radar described in Embodiment I.

[0167] Embodiment IV

[0168] An embodiment of the present invention discloses a computer-readable storage medium that stores a computer program for electronic data exchange, wherein the computer program causes a computer to execute the steps in the signal processing method based on an external radiation source radar described in Embodiment 1.

[0169] Embodiment 5

[0170] An embodiment of the present invention discloses a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute the steps in the signal processing method based on an external radiation source radar described in Embodiment 1.

[0171] The device embodiments described above are merely illustrative. The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed to multiple network modules. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. A person of ordinary skill in the art can understand and implement it without creative work.

[0172] Through the above specific descriptions of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the above technical solution, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, and the storage medium includes a read-only memory (ROM), a random access memory (RAM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), a one-time programmable read-only memory (OTPROM), an electrically-erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc memories, a magnetic disk memory, a tape memory, or any other computer-readable medium capable of carrying or storing data.

[0173] Finally, it should be noted that: What is disclosed by an external radiation source radar based on a Rydberg atom receiver in the embodiments of the present invention is only the preferred embodiments of the present invention, which are only used to illustrate the technical solutions of the present invention and are not intended to limit it; Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A signal processing method based on external radiation source radar, characterized in that: The method comprises: An external radiation source radar is used to obtain first signal information corresponding to a signal wave emitted by an external radiation source and second signal information corresponding to the signal wave reflected by a target object; the external radiation source radar includes a Rydberg atomic gas chamber, a detection laser, a coupling laser, a local oscillator microwave source, and a photoelectric detector; wherein, The detection laser and the photodetector are arranged opposite to each other in the Rydberg atomic gas chamber; The coupling laser and the photodetector are arranged on the same side of the Rydberg atomic gas cell; The Rydberg atomic gas chamber is made of a transparent material, and Rydberg state atomic gas is placed in the Rydberg atomic gas chamber; The coupling laser generates coupling laser; The detection laser generated by the detection laser passes through the Rydberg atomic gas chamber and is detected by the photodetector to obtain the first signal and the second signal information; The coupling laser and the detection laser propagate in opposite directions in the Rydberg atomic gas chamber; the polarization direction of the coupling laser and the polarization direction of the detection laser are parallel to each other; The local oscillator microwave source is used to generate local oscillator microwaves to be detected by the photoelectric detector to obtain third signal information; Performing signal strength analysis on the first signal information to obtain target microwave signal information; The performing signal strength analysis on the first signal information to obtain target microwave signal information includes: performing standardization processing on the signal power information in the first signal information to obtain standard power information; The standard power information is calculated and processed using an intensity calculation model to obtain a power intensity value; Wherein, the strength calculation model is: X=a·log 10 (AND); In the formula, X represents the power intensity value; Y represents the standard power information; a represents the calculation coefficient; Determine whether the power intensity value is greater than or equal to an intensity threshold, and obtain a threshold determination result; When the threshold judgment result is yes, determining the first signal information as target microwave signal information; When the threshold judgment result is no, determining the third signal information generated by the external radiation source radar as the target microwave signal information; The target microwave signal information, the first signal information and the second signal information are analyzed, calculated and processed to obtain target position information.

2. The signal processing method based on external radiation source radar according to claim 1 is characterized in that: The analyzing, calculating and processing the target microwave signal information, the first signal information and the second signal information to obtain the target position information includes: Optimizing the target microwave signal information to obtain optimized microwave signal information; Target position information is determined based on the optimized microwave signal information, the first signal information and the second signal information.

3. The signal processing method based on external radiation source radar according to claim 2 is characterized in that: The determining target position information based on the optimized microwave signal information, the first signal information and the second signal information includes: Using the optimized microwave signal information to filter the second signal information, to obtain second filtered signal information; When the target microwave signal information is the first signal information, determining target position information based on the optimized microwave signal information and the second filtered signal information; When the target microwave signal information is not the first signal information, the target position information is determined based on the optimized microwave signal information, the first signal information and the second filtered signal information.

4. The signal processing method based on external radiation source radar according to claim 3 is characterized in that: The determining the target position information based on the optimized microwave signal information, the first signal information and the second filtered signal information includes: Using the optimized microwave signal information to filter the first signal information, to obtain first filtered signal information; Determining first position information based on the optimized microwave signal information and the first filtered signal information; determining second position information based on the optimized microwave signal information and the second filtered signal information; The first location information and the second location information are analyzed and calculated to obtain the target location information.

5. The signal processing method based on external radiation source radar according to claim 3 is characterized in that: The filtering the second signal information by using the optimized microwave signal information to obtain second filtered signal information includes: Performing Fourier transform on the optimized microwave signal information and the second signal information respectively to obtain first transformed signal information and second transformed signal information; Performing calculation processing on the first transformed signal information and the second transformed signal information to obtain third transformed signal information; Perform inverse Fourier transform processing on the third transformed signal information to obtain second filtered signal information.

6. A signal processing device based on external radiation source radar, characterized in that: The device comprises: The acquisition module is used to acquire the first signal information corresponding to the signal wave emitted by the external radiation source and the second signal information corresponding to the signal wave reflected by the target object by using the external radiation source radar; the external radiation source radar includes a Rydberg atomic gas chamber, a detection laser, a coupling laser, a local oscillator microwave source, and a photoelectric detector; wherein, The detection laser and the photodetector are arranged opposite to each other in the Rydberg atomic gas chamber; The coupling laser and the photodetector are arranged on the same side of the Rydberg atomic gas cell; The Rydberg atomic gas chamber is made of a transparent material, and Rydberg state atomic gas is placed in the Rydberg atomic gas chamber; The coupling laser generates coupling laser; The detection laser generated by the detection laser passes through the Rydberg atomic gas chamber and is detected by the photodetector to obtain the first signal and the second signal information; The coupling laser and the detection laser propagate in opposite directions in the Rydberg atomic gas chamber; the polarization direction of the coupling laser and the polarization direction of the detection laser are parallel to each other; The local oscillator microwave source is used to generate local oscillator microwaves to be detected by the photoelectric detector to obtain third signal information; A first processing module, configured to perform signal strength analysis on the first signal information to obtain target microwave signal information; The performing signal strength analysis on the first signal information to obtain target microwave signal information includes: performing standardization processing on the signal power information in the first signal information to obtain standard power information; The standard power information is calculated and processed using an intensity calculation model to obtain a power intensity value; Wherein, the strength calculation model is: X=a·log 10 (AND); In the formula, X represents the power intensity value; Y represents the standard power information; a represents the calculation coefficient; Determine whether the power intensity value is greater than or equal to an intensity threshold, and obtain a threshold determination result; When the threshold judgment result is yes, determining the first signal information as target microwave signal information; When the threshold judgment result is no, determining the third signal information generated by the external radiation source radar as the target microwave signal information; The second processing module is used to analyze and calculate the target microwave signal information, the first signal information and the second signal information to obtain target position information.

7. A signal processing device based on external radiation source radar, characterized in that: The device comprises: A memory storing executable program code; a processor coupled to the memory; The processor calls the executable program code stored in the memory to execute the signal processing method based on external radiation source radar as described in any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and when the computer instructions are called, they are used to execute the signal processing method based on external radiation source radar according to any one of claims 1 to 5.

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