External radiation source radar based on Rydberg atom receiver

Abstract

The invention discloses an external radiation source radar based on a Rydberg atom receiver. The external radiation source radar comprises the following steps: acquiring 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 processing on the first signal information to obtain target microwave signal information; and analyzing and calculating 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 field of radar technology, and in particular to an external radiation source radar based on a Rydberg atomic receiver. Background Art

[0002] The external radiation source radar system is a dual-base radar under a special system. Its radiation source is a radio and television transmitter with a known location or other non-cooperative radio transmission 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 parameters such as the signal form and transmission method of civil radio and television radiation sources are public, and the radiation power and coverage area are generally large. In addition, most civil radio and television have low radio frequency bands, a large number of stations, and a wide geographical distribution, which has certain advantages in stealth target detection. Traditional antennas cannot be miniaturized due to the antenna size effect when measuring such low-frequency signals. Therefore, an external radiation source radar based on a Rydberg atomic receiver is provided to improve the accuracy and reliability of object detection based on external radiation sources, thereby improving the ability to detect stealth objects in complex electromagnetic environments. 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 atomic receiver, which is beneficial to improving the 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.

[0004] In order to solve the above technical problems, the first aspect of the embodiment of the present invention discloses a signal processing method based on an external radiation source radar, the method comprising:

[0005] Acquire, by using an external radiation source radar, 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;

[0006] Performing signal strength analysis on the first signal information to obtain target microwave signal information;

[0007] The target microwave signal information, the first signal information and the second signal information are analyzed, calculated and processed to obtain target position information.

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

[0009] An acquisition module, used to acquire, by using an external radiation source radar, 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;

[0010] A first processing module, configured to perform signal strength analysis on the first signal information to obtain target microwave signal information;

[0011] 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.

[0012] The third aspect of the present invention discloses another signal processing device based on external radiation source radar, the device comprising:

[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 to execute part or all of the steps in the signal processing method based on the external radiation source radar disclosed in the first aspect of the embodiment of the present invention.

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

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

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

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

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

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

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

[0023] Figure 6 It is a schematic diagram of the operation of a radiation source radar based on a Rydberg atomic receiver disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within 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 "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. 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 may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or equipment.

[0026] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0027] In this application, the word "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described in this application as "exemplary" is not necessarily to be construed as being preferred or advantageous over other embodiments. The following description is given to enable any technician in the field to implement and use the present application. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present application can be implemented without using these specific details. In other instances, well-known structures and processes will not be elaborated in detail to avoid obscuring the description of the present application with unnecessary details. Therefore, the present application is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in the present 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 is actually time information. It can be understood that if size, quantity, position, etc. are mentioned in subsequent embodiments, they are all corresponding data for processing by the computer device. The details will not be repeated here.

[0029] It should be noted that the artificial intelligence related technologies that may be involved in this application are briefly described. 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 respond in a similar way to human intelligence. Artificial intelligence is to study the design principles and implementation methods of various intelligent machines so that machines have the functions of perception, reasoning and decision-making.

[0030] Artificial intelligence technology is a comprehensive discipline that covers a wide range of fields, including both hardware-level and software-level technologies. The basic technologies of artificial intelligence generally include sensors, dedicated artificial intelligence chips, cloud computing, distributed storage, big data processing technology, operation / interaction systems, mechatronics and other technologies. Artificial intelligence software technology mainly includes computer vision technology, speech processing technology, natural language processing technology, and machine learning / deep learning.

[0031] Computer Vision (CV) is a science that studies how to make machines "see". To put it more specifically, it refers to machine vision such as using cameras and computers to replace human eyes to identify and measure targets, and further perform graphic processing so that computer processing becomes an image that is more suitable for human eye observation or transmission to instrument 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 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 positioning and map construction, and other technologies, as well as common biometric recognition technologies such as face recognition and fingerprint recognition.

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

[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 generally refers to a model with hundreds of millions to trillions of parameters. Models usually need to be trained on large-scale data sets and require a large amount of computing resources to be optimized and adjusted. Large models are often used to solve complex tasks such as natural language processing, computer vision, and speech recognition. Generative AI is an AI that can create new content and ideas, including conversations, stories, images, videos, and music. In an embodiment of the present application, the large model may be ChatGPT, BERT, XLNet, Zhipu model, Claude, Moonshot AI model, ChatGLM model, Qianyi Tongwen model, MiniMax model, Spark model, Llama model, 360GPT model, Qwen model, Baichuan model, Skylark model, vivoLM model, and Wenxin Yiyan scale language models, which are not limited in the embodiments of the present application.

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

[0035] See also Figure 1 , Figure 1 Schematic diagram of a scenario of a signal processing system based on an external radiation source radar provided in an embodiment of the present application. The signal processing system based on an external radiation source radar may include a computer device 100, in which a signal processing device based on an external radiation source radar is integrated, such as Figure 1 Computer equipment in.

[0036] In the embodiment of the present application, the computer device 100 is mainly 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 by using an external radiation source radar;

[0037] Performing signal strength analysis on the first signal information to obtain target microwave signal information;

[0038] The target microwave signal information, the first signal information and the second signal information are analyzed, calculated and processed to obtain target position information.

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

[0040] In the embodiment of the present application, the computer device 100 may be an independent server, or a server network or server cluster composed of servers. For example, the computer device 100 described in the embodiment of the present application includes but is not limited to a computer, a network host, a single network server, a plurality of network server sets or a cloud server composed of a plurality of servers. The cloud server is composed of a large number of computers or network servers based on cloud computing.

[0041] It is understandable that the computer device 100 used in the embodiments of the present application may be a device including 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 a device may include: a cellular or other communication device having a single-line display or a multi-line display or a cellular or other communication device without a multi-line display. The specific computer device 100 may be a desktop terminal or a mobile terminal, and the computer device 100 may also be one of a mobile phone, a tablet computer, a laptop computer, etc.

[0042] Those skilled in the art will understand that Figure 1 The application environment shown in the figure is only one application scenario of the present application solution and does not constitute a limitation on the application scenario of the present application solution. Other application environments may also include Figure 1 More or less computer equipment as shown in Figure 1 Only one computer device is shown in the figure. It can be understood that the signal processing system based on the external radiation source radar can also include one or more other services, which are not specifically limited here.

[0043] In addition, if Figure 1 As shown, the signal processing system based on the external radiation source radar may also include a memory 200 for storing data, such as image data, location information, etc.

[0044] It should be noted that Figure 1 The scenario diagram of the signal processing system based on the external radiation source radar shown is only an example. The signal processing system based on the external radiation source radar and the scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not constitute a limitation on the technical solution provided in the embodiment of the present application. A person of ordinary skill in the art can know that with the evolution of the signal processing system based on the external radiation source radar and the emergence of new business scenarios, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

[0045] The present invention discloses an external radiation source radar based on a Rydberg atomic receiver, which is beneficial to improving the accuracy and reliability of object detection based on external radiation sources, thereby improving the ability to detect invisible objects in complex electromagnetic environments. Detailed descriptions are given below.

[0046] Embodiment 1

[0047] See also Figure 2 , Figure 2 : is a flow chart of a signal processing method based on external radiation source radar disclosed in an embodiment of the present invention. Figure 2 The signal processing method based on external radiation source radar described above is applied to a management system, such as a local server or a cloud server for management, and the embodiments of the present invention do not limit this. Figure 2 As shown, the signal processing method based on 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 an external radiation source and second signal information corresponding to a signal wave reflected by a target object.

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

[0050] 103. Analyze and calculate 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-mentioned external radiation source radar has the advantages of being tunable, anti-interference, having measurement results that are independent of size, and being easy to miniaturize, and has certain advantages in detecting stealth objects in complex electromagnetic environments. The microwave electric field measurement method based on Rydberg atoms has the following advantages: (1) It uses atomic parameters for self-calibration, can be traced back to basic physical quantities, and the results are directly benchmarked to the International System of Units; (2) The theoretical limit sensitivity is only limited by quantum projection noise, the device sensitivity is high and is independent of size, and is easy to miniaturize and integrate; (3) It can achieve full optical detection, has little effect on the measured electromagnetic field, and has anti-electromagnetic interference capability. The Rydberg atom receiver can measure the frequency, intensity, phase, and azimuth of the incident microwave. The external radiation source radar based on the Rydberg atom receiver has separate transceiver stations and has good anti-interference, anti-anti-radiation weapons, anti-stealth targets, and anti-low-altitude penetration performance. Using Rydberg atoms as the receiving station of the external radiation source radar can better solve the problem that the traditional antenna is affected by the antenna size effect when measuring low-frequency long-wave signals, and realize a miniaturized external radiation source radar. The external radiation source radar based on the Rydburg atomic receiver is easy to conceal and has the anti-stealth potential of multiple bases and low-frequency bands. Making full use of such electromagnetic resources to form a networked regional early warning system is of great and far-reaching significance.

[0052] It should be noted that the external radiation source radar includes two parts: the receiving station and the transmitting station. The signal receiving station is composed of a Rydberg atomic receiver. The transmitting station is a non-cooperative opportunistic irradiation source, which can send various broadcast signals such as FM radio signals, analog TV signals, mobile communication signals or navigation satellite signals as external radiation source signals. The location 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 two places. The Rydberg atomic receiver is mainly composed of structural units such as a Rydberg atomic gas chamber, a detection laser, a coupling laser, a local oscillator microwave source, and a photoelectric detector. It can receive direct microwaves and target echoes, and can give the frequency difference and phase difference between the two microwave beams, and can give the incident azimuth of the target echo when the location of the external radiation source or the incident azimuth of the direct microwave is known. The Rydberg atomic gas chamber is filled with alkali metal or alkaline earth metal atomic gases such as rubidium atoms, cesium atoms or strontium atoms. The atomic gas chamber is made of transparent materials such as glass, which allows lasers and microwaves to pass through the transparent materials and interact with the Rydberg atoms in the atomic gas chamber. Figure 6As shown, the implementation method of the external radiation source radar based on the Rydberg atomic receiver can use the direct microwave as the local oscillator microwave of the atomic receiver and the target echo as the signal microwave of the atomic receiver when the direct microwave is strong; the target's movement speed and the distance between the target and the radar transceiver station are given according to the frequency and phase of the mixing signal; the frequency of the target echo is given according to the known direct microwave frequency; the frequency and incident azimuth of the target echo can be given according to the known direct microwave frequency and incident azimuth; the direct microwave and target echo emitted from the same radiation source are correlated, so the two microwave beams can reduce clutter interference when mixing. The implementation method of the external radiation source radar based on the Rydberg atomic receiver can use the direct wave and the target echo as signal microwaves for two sets of atomic receivers respectively when the direct wave signal emitted by the external radiation source is weak, and use the local oscillator microwave source to provide the local oscillator microwave at the same time; the frequency, intensity and incident azimuth of the local oscillator microwave emitted by the local oscillator microwave source are known and can be adjusted, and the local oscillator microwaves received by the two sets of Rydberg atomic receivers are synchronized through the atomic clock signal, so that the frequency, intensity and phase information of the direct wave and the target echo can be given by the mixing signals of the two sets of Rydberg atomic receivers, and then the target's movement speed, the distance between the target and the radar transceiver station and; the frequency and incident azimuth of the direct microwave and the local oscillator microwave are known, and the target echo frequency has been measured, and the incident azimuth of the target echo can be given according to the phase of the mixing signal. The implementation method of the external radiation source radar based on the Rydberg atomic receiver can provide the target's movement speed and position information according to the measured target echo azimuth, the frequency difference between the target echo and the direct microwave, and the phase difference between the target echo and the direct microwave, when the external radiation source position, the direct microwave frequency and azimuth are known. 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 atomic receiver, and the target echo is used as the signal microwave of the atomic receiver. The frequency of the mixing signal corresponds to the frequency difference between the direct microwave and the target echo, and the phase of the mixing 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 of the direct wave and the frequency of the target echo can be calculated. The direct microwave and the target echo are regarded as plane waves, and the incident azimuth of the target echo can be given. The present invention provides the frequency difference, phase difference, and incident azimuth of the target echo between the direct microwave and the target echo, and then the movement 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 signal microwaves for the Rydberg atomic receiver, and the local oscillator microwave source provides the local oscillator microwave of the Rydberg atomic receiver. The mixing results of the two Rydberg atomic receivers can give the frequency difference and phase difference between the direct microwave and the target echo, as well as the incident azimuth of the target echo, and then the target's motion speed and position information 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 signal of the echo channel; using the preprocessed signal, a signal model can be established, and further matching filtering or compressed sensing methods can be used for joint processing of distance-Doppler-angle; after predicting the distance, Doppler, and angle, a hypothesis test problem can be further constructed to detect a certain moving target and estimate the parameters of interest; thereby achieving the positioning and tracking of the target. When the direct microwave intensity emitted by the external radiation source is weak, it is necessary to locate and track the joint target based on 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 matching filtering or compressed sensing methods can be used for joint processing of distance-Doppler-angle; after predicting the distance, Doppler, and angle, a hypothesis test problem can be further constructed to detect a certain moving target and estimate the parameters of interest; thereby achieving the positioning and tracking of the target and thus achieving the positioning and tracking of the joint target.

[0053] It should be noted that the signal processing based on the external radiation source radar of the present application realizes the frequency modulation of the external radiation radar based on the Rydberg atomic 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 at the same time through the Rydberg atomic receiver when the direct wave is strong, avoiding the disadvantage that the traditional antenna-based external radiation source radar 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 has nothing to do with the size, and is not affected by the traditional antenna half-wave size effect. The present application uses the Rydberg atomic receiver as the receiving station of the external radiation source radar. The Rydberg atomic receiver has little effect on the electromagnetic field being measured 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 utilizes a radio and television transmitter with a known location or other non-cooperative radio transmission equipment as an external radiation source. The radar transceiver stations are separated, which has good anti-interference and anti-radiation properties. It is easy to conceal and has multi-base and low-frequency anti-stealth potential.

[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 external radiation source radar described in the embodiment of the present invention is conducive to improving the accuracy and reliability of object detection based on external radiation sources, thereby improving the ability to detect stealth objects in complex electromagnetic environments.

[0056] In an optional embodiment, the target microwave signal information, the first signal information and the second signal information are analyzed and calculated to obtain the target position information, including:

[0057] Optimizing the target microwave signal information to obtain optimized microwave signal information;

[0058] The target position information is determined based on the optimized microwave signal information, the first signal information and the second signal information.

[0059] It should be noted that the above-mentioned optimization processing of the target microwave signal information to obtain the optimized microwave signal information is processed using a signal optimization model. Further, Figure 5 As shown, the 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 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 a 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, which is not limited in the embodiment of the present invention.

[0062] It should be noted that the above-mentioned first pooling module, second pooling module and third pooling module are constructed based on the maximum pooling layer, which is not limited in the embodiment of the present invention.

[0063] It should be noted that the above activation module is constructed based on the ReLu activation function, which is not limited in the embodiment of the present invention.

[0064] It should be noted that the convolution kernel size of the above-mentioned first convolution module is 11×11, the convolution kernel size of the second convolution module, the third convolution module, and the third convolution module is 5×5, the convolution kernel size of the fourth convolution module, the fifth convolution module, and the sixth convolution module is 3×3, the number of channels is 3, 64, 64, 192, 384, and 256 respectively, and the step size is 4, which is not limited in the embodiment of the present invention.

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

[0066] It can be seen that implementing the signal processing method based on external radiation source radar described in the embodiment of the present invention is conducive to improving the accuracy and reliability of object detection based on external radiation sources, thereby improving the ability to detect stealth objects in complex electromagnetic environments.

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

[0068] Using the optimized microwave signal information to filter the second 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, the target position information is determined 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-mentioned determination of the target position information based on the optimized microwave signal information and the second filtered signal information can be performed by using a matched filtering or compressed sensing method to perform a joint processing of distance-Doppler-angle to obtain the position information of the object 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 at the current moment can be obtained, and the embodiments of the present invention are not limited to this.

[0072] It can be seen that implementing the signal processing method based on external radiation source radar described in the embodiment of the present invention is conducive to improving the accuracy and reliability of object detection based on external radiation sources, thereby improving the ability to detect stealth objects in complex electromagnetic environments.

[0073] In yet another optional embodiment, determining the target position information based on the optimized microwave signal information, the first signal information, and the second filtered signal information includes:

[0074] Using the optimized microwave signal information to filter the first signal information, to obtain first filtered signal information;

[0075] Determining first position information based on the optimized microwave signal information and the first filtered signal information;

[0076] Determining second position information based on the optimized microwave signal information and the second filtered signal information;

[0077] The first position information and the second position information are analyzed and calculated to obtain target position information.

[0078] It should be noted that the above-mentioned processing method of filtering the first signal information by using the optimized microwave signal information is consistent with the processing of filtering the second signal information by using the optimized microwave signal information, and the embodiment of the present invention does not limit this.

[0079] It should be noted that the processing method based on optimizing the microwave signal information and the first filtered signal information and based on optimizing the microwave signal information and the second filtered signal information is consistent with the processing method based on optimizing the microwave signal information and the second filtered signal information, and the embodiment of the present invention does not limit this.

[0080] It should be noted that the above-mentioned analysis and calculation of the first position information and the second position information is to first calculate the position of the external radiation source radar through the first position information (that is, the position of the external radiation source radar relative to the external radiation source), and then calculate the target position information of the object through the second position information (that is, the position of the object relative to the external radiation source radar), which is not limited in the embodiments of the present invention.

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

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

[0083] Perform 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;

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

[0085] The third transformed signal information is subjected to inverse Fourier transform processing to obtain second filtered signal information.

[0086] It should be noted that the Fourier transform of the optimized microwave signal information and the second signal information is to convert the time domain signal into a frequency domain signal for the convenience of the next step of calculation and processing, which is not limited in the embodiment of the present invention.

[0087] It should be noted that the inverse Fourier transform processing of the third transformed signal information is to convert the frequency domain signal back into a time domain signal to facilitate subsequent further position information, which is not limited in the embodiment 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 may be implemented based on the ECA-B algorithm, which is not limited in the embodiment of the present invention.

[0089] It can be seen that implementing the signal processing method based on external radiation source radar described in the embodiment of the present invention is conducive to improving the accuracy and reliability of object detection based on external radiation sources, thereby improving the ability to detect stealth objects in complex electromagnetic environments.

[0090] In an optional embodiment, the above-mentioned performing signal strength analysis on the first signal information to obtain the target microwave signal information includes:

[0091] Performing standardization processing on the signal power information in the first signal information to obtain standard power information;

[0092] The standard power information is calculated and processed using the intensity calculation model to obtain the power intensity value;

[0093] The strength 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] Determine whether the power intensity value is greater than or equal to an intensity threshold, and obtain a threshold determination result;

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

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

[0099] It should be noted that the above intensity threshold can be set by the user, or a default value given by the system, or a larger average of historical intensity thresholds, which is not limited in the embodiment of the present invention. Further, the above intensity threshold is a positive number not less than 1, which is not limited in the embodiment of the present invention.

[0100] It should be noted that the above-mentioned standardization of the signal power information in the first signal information is to convert the signal power information into mW and divide it by 1mW, thereby removing the dimension thereof and obtaining pure digital information, which is convenient for subsequent calculation and analysis, and the embodiment of the present invention does not limit this.

[0101] It should be noted that when the direct microwave electric field intensity emitted by the external radiation source is relatively strong (the power intensity value is greater than or equal to the intensity threshold), the direct wave (first signal information) can be directly used as the target microwave signal information, and the frequency and incident azimuth of the direct wave can be obtained based on the public information of the external radiation source; when the direct microwave electric field intensity emitted by the external radiation source is relatively weak (the power intensity value is less than the intensity threshold), the local oscillator microwave (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 and the external radiation source can be synchronized by two atomic clocks that have been synchronized in advance, which is not limited in the embodiment of the present invention. Furthermore, the frequency and azimuth of the local oscillator microwave are known, and its polarization direction is parallel to the polarization direction of the detection laser and the coupling laser, which is not limited in the embodiment of the present invention. The signal microwave and the local oscillator microwave are irradiated onto the same atomic gas chamber, and the polarization direction of the signal microwave is parallel to the polarization direction of the local oscillator microwave. In the atomic gas chamber, the detection light, the coupling light, the local oscillator microwave, and the signal microwave undergo four-wave mixing, resulting in the detection light transmittance changing over time. The intensity of the detection light passing through the atomic gas chamber is measured using a photodetector, and the mixing signal of the local oscillator microwave and the signal microwave at the Rydberg atomic receiver is given based on the change in 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. Based on the known local oscillator microwave frequency, 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 a default value given by the system, or a larger average of historical calculation coefficients, which is not limited in the embodiment of the present invention. Further, the above calculation coefficient is a positive number not less than 8, which is not limited in the embodiment of the present invention.

[0103] It can be seen that implementing the signal processing method based on external radiation source radar described in the embodiment of the present invention is conducive to improving the accuracy and reliability of object detection based on external radiation sources, thereby improving the ability to detect stealth objects in complex electromagnetic environments.

[0104] In another optional embodiment, 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,

[0105] The detection laser and the photodetector are arranged opposite to each other in the Rydberg atomic gas chamber;

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

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

[0108] The coupling laser generates a coupling laser;

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

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

[0111] The local oscillator microwave source is used to generate local oscillator microwaves to be detected by the light spot detector 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, which are not limited in the embodiments of the present invention. Furthermore, 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, and being able to effectively utilize the existing electromagnetic environment without causing electromagnetic pollution to the environment; at the same time, the external radiation source radar has low development cost, small equipment size, and strong mobility, which are not limited in the embodiments of the present invention.

[0113] It should be noted that the material used to manufacture the Rydberg atomic gas cell may be a transparent material such as glass, so that laser and microwave can pass through the transparent material to interact with the Rydberg atoms in the atomic gas cell, and the embodiment of the present invention is not limited thereto.

[0114] It should be noted that the above-mentioned coupling laser is used to perform operations such as pumping, cooling, and exciting atoms, which is not limited in the embodiment of the present invention.

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

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

[0117] Embodiment 2

[0118] See also Figure 3 , Figure 3 : is a schematic diagram of a signal processing device based on an external radiation source radar disclosed in an embodiment of the present invention. 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. Figure 3 As shown, the device may include:

[0119] An acquisition module 201 is used to acquire, by using an external radiation source radar, 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] The first processing module 202 is used to perform signal strength analysis on the first signal information to obtain target microwave signal information;

[0121] The second processing module 203 is used to analyze and calculate the target microwave signal information, the first signal information and the second signal information to obtain the target position information.

[0122] It can be seen that implementation Figure 3 The described signal processing device based on external radiation source radar is beneficial to improving the accuracy and reliability of object detection based on external radiation source, thereby improving the ability to detect stealth objects in complex electromagnetic environments.

[0123] In another optional embodiment, Figure 3 As shown, the first processing module 202 analyzes and calculates the target microwave signal information, the first signal information and the second signal information to obtain the target position information, including:

[0124] Optimizing the target microwave signal information to obtain optimized microwave signal information;

[0125] The target position information is determined based on the optimized microwave signal information, the first signal information and the second signal information.

[0126] It can be seen that implementation Figure 3 The described signal processing device based on external radiation source radar is beneficial to improving the accuracy and reliability of object detection based on external radiation source, thereby improving the ability to detect stealth objects in complex electromagnetic environments.

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

[0128] Using the optimized microwave signal information to filter the second signal information, to obtain second filtered signal information;

[0129] 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;

[0130] 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.

[0131] It can be seen that implementation Figure 3 The described signal processing device based on external radiation source radar is beneficial to improving the accuracy and reliability of object detection based on external radiation source, thereby improving the ability to detect stealth objects in complex electromagnetic environments.

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

[0133] Using the optimized microwave signal information to filter the first signal information, to obtain first filtered signal information;

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

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

[0136] The first position information and the second position information are analyzed and calculated to obtain target position information.

[0137] It can be seen that implementation Figure 3 The described signal processing device based on external radiation source radar is beneficial to improving the accuracy and reliability of object detection based on external radiation source, thereby improving the ability to detect stealth objects in complex electromagnetic environments.

[0138] In yet another optional embodiment, Figure 3 As shown, the first processing module 202 uses the optimized microwave signal information to filter the second signal information to obtain second filtered signal information, including:

[0139] Perform 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;

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

[0141] The third transformed signal information is subjected to inverse Fourier transform processing to obtain second filtered signal information.

[0142] It can be seen that implementation Figure 3 The described signal processing device based on external radiation source radar is beneficial to improving the accuracy and reliability of object detection based on external radiation source, thereby improving the ability to detect stealth objects in complex electromagnetic environments.

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

[0144] Performing standardization processing on the signal power information in the first signal information to obtain standard power information;

[0145] The standard power information is calculated and processed using the intensity calculation model to obtain the power intensity value;

[0146] The strength 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] Determine whether the power intensity value is greater than or equal to an intensity threshold, and obtain a threshold determination result;

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

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

[0152] It can be seen that implementation Figure 3 The described signal processing device based on external radiation source radar is beneficial to improving the accuracy and reliability of object detection based on external radiation source, thereby improving the ability to detect stealth objects in complex electromagnetic environments.

[0153] In yet another optional embodiment, Figure 3As shown, 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,

[0154] The detection laser and the photodetector are arranged opposite to each other in the Rydberg atomic gas chamber;

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

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

[0157] The coupling laser generates a coupling laser;

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

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

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

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

[0162] Embodiment 3

[0163] See also Figure 4 , Figure 4 is a schematic diagram of the structure of another signal processing device based on external radiation source radar disclosed in an embodiment of the present invention. 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. Figure 4 As shown, the device may include:

[0164] A memory 301 storing executable program codes;

[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 the first embodiment.

[0167] Embodiment 4

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

[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 enable a computer to execute the steps in the signal processing method based on external radiation source radar described in the first embodiment.

[0171] The device embodiments described above are only illustrative, wherein the modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, i.e., they may be located in one place, or they may be distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative work.

[0172] Through the specific description of the above embodiments, those skilled in the art can clearly understand that each implementation method 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 can be essentially or partly contributed to the prior art in the form of a software product, and 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 electronically erasable rewritable read-only memory (EEPROM), a compact disc (CD-ROM) or other optical disc storage, magnetic disk storage, magnetic tape storage, or any other computer-readable medium that can be used to carry or store data.

[0173] Finally, it should be noted that the external radiation source radar based on the Rydberg atomic receiver disclosed in the embodiment of the present invention is only a preferred embodiment of the present invention, which is only used to illustrate the technical solution of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, it should be understood by those skilled in the art that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A signal processing method based on external radiation source radar, characterized in that: The method comprises: Acquire, by using an external radiation source radar, 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; Performing signal strength analysis on the first signal information to obtain 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. The signal processing method based on external radiation source radar according to claim 1 is characterized in that: 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, the third signal information generated by the external radiation source radar is determined as the target microwave signal information.

7. The signal processing method based on external radiation source radar according to claim 1 is characterized in that: 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 light spot detector to obtain the third signal information.

8. A signal processing device based on external radiation source radar, characterized in that: The device comprises: An acquisition module, used to acquire, by using an external radiation source radar, 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; A first processing module, configured to perform signal strength analysis on the first signal information to obtain 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.

9. 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 7.

10. 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 7.

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