Radiation Source Localization Method, Apparatus, Electronic Device, and Storage Medium

Abstract

The present application provides a method, apparatus, electronic device, and storage medium for locating a radiation source. The radiation source device simultaneously transmits radio frequency signals to a main satellite and an adjacent satellite module. After being processed separately, the two are transmitted to a receiving station module. The receiving station uses an adjacent satellite interference suppression algorithm to accurately distinguish and weaken the interference signals from adjacent satellites, significantly improving the recognition rate and purity of the target signal. On this basis, combined with a passive positioning algorithm, the position of the radiation source can be accurately calculated only based on the received first channelized signal and the signal after interference suppression processing. This not only enhances the signal processing ability in a complex electromagnetic environment but also ensures stable and accurate positioning of the radiation source even under strong interference conditions.

Description

Technical Field

[0001] The present application relates to the technical field of radio positioning, and particularly relates to a positioning method, device, electronic device and storage medium for a radiation source. Background Art

[0002] In order to ensure communication security and management, it is necessary to locate radiation sources in satellite communication scenarios. However, due to the directivity of antennas, the radio frequency signals emitted by radiation sources are mainly concentrated in the direction of the main satellite, and the intensity of the target radiation signals received by neighboring satellites is much smaller than that of the main satellite; in other words, the intensity of the target signals on neighboring satellites is very weak. At the same time, as a general satellite, a neighboring satellite has its own communication services carried. When its own communication signals overlap with the signals emitted by the target radiation source in the frequency domain, the communication signals become strong interference signals relative to the signals emitted by the target radiation source.

[0003] Based on the above situation, the existence of strong interference signals will lead to the failure of extracting target signals, and thus the positioning of radiation sources cannot be achieved. Summary of the Invention

[0004] In view of this, the purpose of the present application is to propose a positioning method, device, electronic device and storage medium for a radiation source to solve the above technical problems.

[0005] Based on the above purpose, the first aspect of the present application provides a positioning method for a radiation source, which is applied to a positioning system for a radiation source. The system includes a radiation source device, a main satellite, a neighboring satellite module and a receiving station module. The method includes:

[0006] The radiation source device sends radio frequency signals to the main satellite and sends radio frequency signals to the neighboring satellite module;

[0007] The main satellite performs channel processing on the received radio frequency signals to obtain a first channelized signal, and transmits the first channelized signal to the receiving station module;

[0008] The neighboring satellite module performs channel processing on the received radio frequency signals to obtain a second channelized signal, and transmits the second channelized signal to the receiving station module;

[0009] The receiving station module performs interference suppression processing on the received first channelized signal and the received second channelized signal through a neighboring satellite interference suppression algorithm to obtain an interference suppression processed signal, and performs positioning processing on the received first channelized signal and the interference suppression processed signal through a passive positioning algorithm to obtain the position of the radiation source device.

[0010] Based on the same inventive concept, a second aspect of the present application provides a positioning device for a radiation source. The device is arranged in a positioning system of the radiation source, and the system includes a radiation source device, a main satellite, a neighboring satellite module, and a receiving station module. The device includes:

[0011] A radiation source device, configured to send a radio frequency signal to the main satellite and send a radio frequency signal to the neighboring satellite module;

[0012] A main satellite, configured to perform channel processing on the received radio frequency signal to obtain a first channelized signal, and transmit the first channelized signal to the receiving station module;

[0013] A neighboring satellite module, configured to perform channel processing on the received radio frequency signal to obtain a second channelized signal, and transmit the second channelized signal to the receiving station module;

[0014] A receiving station module, configured to perform interference suppression processing on the received first channelized signal and the received second channelized signal through an adjacent satellite interference suppression algorithm to obtain an interference suppression processed signal, and perform positioning processing on the received first channelized signal and the interference suppression processed signal through a passive positioning algorithm to obtain the position of the radiation source device.

[0015] Based on the same inventive concept, a third aspect of the present application provides an electronic device, including a memory, a processor, and a computer program stored on the memory and running on the processor. When the processor executes the computer program, the method described in the first aspect above is implemented.

[0016] Based on the same inventive concept, a fourth aspect of the present application provides a non-transitory computer-readable storage medium. The non-transitory computer-readable storage medium stores computer instructions, and the computer instructions are used to cause a computer to execute the method described in the first aspect above.

[0017] As can be seen from the above, the positioning method, device, electronic device, and storage medium for a radiation source provided by the present application transmit radio frequency signals to the main satellite and the neighboring satellite module simultaneously through the radiation source device. After being processed separately, they are transmitted to the receiving station module. The receiving station uses the adjacent satellite interference suppression algorithm to accurately distinguish and weaken the interference signals from neighboring satellites, significantly improving the recognition rate and purity of the target signals. On this basis, combined with the passive positioning algorithm, the position of the radiation source can be accurately calculated only based on the received first channelized signal and the signal after interference suppression processing. It not only enhances the signal processing ability in a complex electromagnetic environment but also ensures that the precise positioning of the radiation source can be stably achieved even under strong interference conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the technical solutions in the present application or related technologies, the following will briefly introduce the drawings required for use in the embodiments or related technology descriptions. Obviously, the drawings in the following descriptions are only the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 Schematic diagram of the satellite passive positioning scenario for the embodiment of the present application;

[0020] Figure 2 Schematic diagram of the common satellite passive positioning data acquisition and processing process for the embodiment of the present application;

[0021] Figure 3 Schematic diagram of the adjacent satellite interference signal for the embodiment of the present application;

[0022] Figure 4 Flowchart of the positioning method for the radiation source in the embodiment of the present application;

[0023] Figure 5 Schematic diagram of the satellite passive positioning different-frequency data acquisition and processing process for the embodiment of the present application;

[0024] Figure 6 Schematic diagram of the different-frequency acquisition process of the independent radio frequency receiving channel for the embodiment of the present application;

[0025] Figure 7 Schematic diagram of the different-frequency acquisition process of the independent channelized channel for the embodiment of the present application;

[0026] Figure 8 Schematic diagram of the acquisition target setting for the main adjacent 1 signal group in the embodiment of the present application;

[0027] Figure 9 Schematic diagram of the acquisition target setting for the main adjacent 2 signal group in the embodiment of the present application;

[0028] Figure 10 Schematic diagram of two target signals existing in the main satellite for the embodiment of the present application;

[0029] Figure 11 Schematic diagram of the different-frequency acquisition of one target signal for the embodiment of the present application;

[0030] Figure 12 Schematic diagram of the different-frequency acquisition of another target signal for the embodiment of the present application;

[0031] Figure 13 Schematic diagram of the satellite positioning scenario with a reference station for the embodiment of the present application;

[0032] Figure 14Schematic diagram of the heterogenous frequency acquisition and processing process with reference signals according to an embodiment of the present application;

[0033] Figure 15 Schematic diagram of the suppression process of adjacent satellite interference signals according to an embodiment of the present application;

[0034] Figure 16 Schematic diagram of the main and adjacent satellite signal spectrogram according to an embodiment of the present application;

[0035] Figure 17 Schematic diagram of the frequency domain filter coefficients of adjacent satellite 1 according to an embodiment of the present application;

[0036] Figure 18 Schematic diagram of the frequency domain filter coefficients of adjacent satellite 2 according to an embodiment of the present application;

[0037] Figure 19 Schematic diagram of the comparison of the CAF peaks between the main satellite and adjacent satellite 1 signals according to an embodiment of the present application;

[0038] Figure 20 Schematic diagram of the comparison of the CAF peaks between the main satellite and adjacent satellite 2 signals according to an embodiment of the present application;

[0039] Figure 21 Structural block diagram of the positioning device of the radiation source according to an embodiment of the present application;

[0040] Figure 22 Schematic diagram of the electronic device according to an embodiment of the present application. Detailed implementation manners

[0041] To make the objectives, technical solutions and advantages of the present application more clear and understandable, the present application will be further described in detail below with reference to specific embodiments and the accompanying drawings.

[0042] It should be noted that unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should have the ordinary meanings understood by those of ordinary skill in the art to which the present application belongs. The "first", "second" and similar terms used in the embodiments of the present application do not denote any order, quantity or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or objects appearing before this term cover the elements or objects listed after this term and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0043] It is understandable that before using the technical solutions of the various embodiments of the present application, the types, usage scopes, usage scenarios, etc. of the personal information involved will be informed to the user in an appropriate manner, and the user's authorization will be obtained.

[0044] For example, when responding to a user's active request, a prompt message is sent to the user to clearly prompt the user that the operation requested by the user will require obtaining and using the user's personal information. Thus, the user can autonomously choose whether to provide personal information to software or hardware such as an electronic device, application program, server, or storage medium that executes the operation of the technical solution of the present application according to the prompt message.

[0045] As an optional but non-limiting implementation manner, the way of sending a prompt message to the user in response to receiving the user's active request can be, for example, in the form of a pop-up window, and the prompt message can be presented in text in the pop-up window. In addition, the pop-up window can also carry selection controls for the user to choose "agree" or "disagree" to provide personal information to the electronic device.

[0046] It is understandable that the above process of notifying and obtaining the user's authorization is only illustrative and does not limit the implementation manner of the present application. Other ways that meet relevant laws and regulations can also be applied to the implementation manner of the present application.

[0047] In a satellite communication scenario, when a radiation source sends an uplink signal to a target satellite, due to the openness of the wireless channel, in addition to the target satellite (the main satellite), its neighboring satellites (neighboring satellite 1, neighboring satellite 2) will also receive the uplink signal and forward it. By receiving the downlink signals forwarded by the main satellite and the neighboring satellites, calculating the time difference of arrival (TDOA) and / or frequency difference of arrival (FDOA) of different signals reaching the receiving station, and combining the satellite ephemeris and the coordinate information of the receiving station (receiving station 1, receiving station 2, receiving station 3), the positioning of the radiation source (i.e., the radiation source device) can be achieved, as Figure 1 shown.

[0048] Due to the directivity of the antenna, the radio frequency signals emitted by the radiation source are mainly concentrated in the direction of the main satellite, and the intensity of the target radiation signal received by the neighboring satellites is much smaller than that of the main satellite; in other words, the target signal intensity on the neighboring satellites is very weak. At the same time, as a general satellite, the neighboring satellite has its own communication services carried. When its own communication signal coincides with the signal emitted by the target radiation source in the frequency domain, relative to the signal emitted by the target radiation source, this communication signal becomes a strong interference signal. The existence of the strong interference signal will cause the failure to extract the target signal, and thus the positioning of the radiation source cannot be achieved.

[0049] The present application provides a method for locating a radiation source, which can effectively avoid the influence of interference signals on the extraction of target signals and improve the success rate of target location.

[0050] In the satellite passive positioning scenario, taking three satellites as an example, common signal acquisition and processing methods are as Figure 2 shown. The main and neighboring satellite signals are received by the receiving antenna, and after a series of radio frequency reception processes such as low-noise amplification and down-conversion, channelized synchronous acquisition is then performed. Channelized synchronous acquisition can be processed by the same device or by different devices separately. After channelized synchronous acquisition, the main satellite signal and the neighboring satellite signal are obtained.

[0051] For subsequent TDOA / FDOA parameter estimation, the main and neighboring satellite signals usually need to meet:

[0052] Spectrum consistency: That is, the spectrum bandwidths of the main satellite signal and the neighboring satellite signal are the same. The acquisition of the main and neighboring satellite signals is essentially the acquisition of the downlink signals after the target radiation signal is relayed by the main satellite and the neighboring satellite. Since the target signal is the same, it is required that the spectrum of the satellite uplink signal corresponding to the acquired signal is consistent.

[0053] Sampling rate is the same:

[0054] That is, the sampling rates of the main satellite signal and the neighboring satellite signal are the same. This is because in the calculation process of TDOA / FDOA parameter estimation, time-domain cross-correlation calculation needs to be performed on the main and neighboring satellite signals, which requires that the sampling rates of the main and neighboring satellite signals must be the same, otherwise the calculation cannot be carried out.

[0055] When there is an interference signal in the target signal frequency band on the neighboring satellite, as Figure 3 shown, using the above processing method will collect the interference signal together, resulting in the failure of subsequent target signal extraction.

[0056] An embodiment of the present application provides a method for locating a radiation source. The radiation source device simultaneously transmits radio frequency signals to the main satellite and the neighboring satellite module, and after they are respectively processed, they are transmitted to the receiving station module. The receiving station uses the neighboring satellite interference suppression algorithm to accurately distinguish and weaken the interference signals from the neighboring satellite, significantly improving the recognition rate and purity of the target signal. On this basis, combined with the passive positioning algorithm, the position of the radiation source can be accurately calculated only based on the received first channelized signal and the signal after interference suppression processing. It not only enhances the signal processing ability in a complex electromagnetic environment but also ensures that the precise positioning of the radiation source can be stably achieved even under strong interference conditions.

[0057] As Figure 4As shown, a positioning system applied to a radiation source, the system includes a radiation source device, a main satellite, a neighboring satellite module, and a receiving station module. The method of this embodiment includes:

[0058] Step 101, the radiation source device sends a radio frequency signal to the main satellite and sends a radio frequency signal to the neighboring satellite module.

[0059] In this step, the radiation source device generates a radio frequency (RF) signal and directs it to a satellite called the main satellite. The main satellite usually plays a major or core role in a satellite communication or observation system. It is responsible for receiving signals from the ground or other satellites and may perform tasks such as data processing, relaying, or forwarding.

[0060] In addition to the main satellite, the radiation source device also sends radio frequency signals to one or more neighboring satellites (i.e., the neighboring satellite module). Here, the neighboring satellite module refers to other satellites or satellite components operating in the same orbit or a similar orbit as the main satellite. These neighboring satellite modules may work in cooperation with the main satellite as part of auxiliary, backup, or extended functions to jointly complete specific tasks.

[0061] Step 102, the main satellite performs channel processing on the received radio frequency signal to obtain a first channelized signal and transmits the first channelized signal to the receiving station module.

[0062] In this step, after receiving the radio frequency signal, the main satellite performs channel processing on it. Channel processing is an important part of signal processing, which may include a series of operations such as signal filtering, demodulation, and decoding, aiming to extract useful information from the received signal while reducing or eliminating noise and interference.

[0063] In this specific scenario, the result of channel processing is to convert the original radio frequency signal into a first channelized signal. A channelized signal refers to a signal that has undergone specific processing (such as filtering, downconversion, etc.) so that the signal is reflected within a specific frequency channel or frequency band.

[0064] After completing the channel processing, the main satellite transmits the obtained first channelized signal to the receiving station module. The receiving station module is part of the satellite communication system and is responsible for receiving signals from the satellite and performing further signal processing or data extraction.

[0065] This transmission process may involve re - modulation, coding of the signal, and passing through devices such as the satellite's transponder to ensure that the signal can be accurately transmitted to the receiving station module on the ground or another satellite.

[0066] Step 103: The adjacent satellite module performs channel processing on the received RF signal to obtain a second channelized signal, and transmits the second channelized signal to the receiving station module.

[0067] In this step, after the adjacent satellite module interprets the RF signal, it performs channel processing on it. Channel processing is an important part of signal processing, which can include a series of operations such as signal filtering, demodulation, decoding, etc., aiming to extract useful information from the received signal while reducing or eliminating noise and interference.

[0068] In this specific scenario, the result of channel processing is to convert the original RF signal into a second channelized signal. A channelized signal refers to a signal that has undergone specific processing (such as filtering, down-conversion, etc.) so that the signal is reflected within a specific frequency channel or frequency band.

[0069] After completing the channel processing, the adjacent satellite module transmits the obtained second channelized signal to the receiving station module. The receiving station module is part of the satellite communication system, responsible for receiving signals from the satellite and performing further signal processing (such as decoding, restoring the original data, etc.) or data extraction.

[0070] This step is a key link in the information transmission chain of the satellite communication system, which ensures that the signals received from the satellite can be correctly transmitted to the ground station and then used by users or other parts of the system.

[0071] Step 104: The receiving station module performs interference suppression processing on the received first channelized signal and the received second channelized signal through an adjacent satellite interference suppression algorithm to obtain an interference suppression processed signal, and performs positioning processing on the received first channelized signal and the interference suppression processed signal through a passive positioning algorithm to obtain the position of the radiation source device.

[0072] In this step, in a wireless communication system, especially in a satellite communication or dense network environment, a receiving station may receive signals from multiple transmitters (for example, multiple satellites or other wireless transmitters) simultaneously. Interference may occur between these signals, especially when they use similar frequencies or channels, and this interference is called adjacent satellite interference.

[0073] The purpose of the adjacent satellite interference suppression algorithm is to reduce or eliminate this interference, thereby improving the quality and accuracy of the received signal. This is crucial for ensuring the reliability and efficiency of communication.

[0074] The receiving station module first receives two channelized signals (the first channelized signal and the second channelized signal). These signals have been preprocessed, such as filtering, amplification, etc., to prepare for further digital signal processing. Then, the module applies an adjacent satellite interference suppression algorithm, which may include various techniques, such as adaptive filtering, beamforming, frequency domain processing, etc., to identify and reduce the interference components from other emission sources. The processed signal is called the interference suppression processed signal.

[0075] Passive positioning is a technique for determining the position of an emission source through received signals without the need to transmit additional signals for positioning. This has wide applications in fields such as military reconnaissance, air traffic management, and wireless communication network optimization.

[0076] Through the passive positioning algorithm, the receiving station module can determine the position of the radiation source that generates the received signals. This is crucial for tasks such as tracking targets and monitoring network performance.

[0077] After the adjacent satellite interference suppression processing, the receiving station module uses the first channelized signal (which may still contain some useful information, although it may have undergone interference suppression processing) and the interference suppression processed signal (a cleaner signal) as inputs, and applies the passive positioning algorithm. This algorithm may be based on various parameters such as Time Difference Of Arrival (TDOA), Angle of Arrival (AOA), Received Signal Strength Indication (RSSI), etc., and combines data from multiple receiving stations (if available) to determine the three-dimensional position of the radiation source.

[0078] In addition, by calculating the Time Difference Of Arrival (TDOA) and / or Frequency Difference Of Arrival (FDOA) of different signals arriving at the receiving station, and combining satellite ephemeris and receiving station coordinate information, precise positioning of the radiation source can be achieved.

[0079] For example, applying the TDOA positioning technique, the position of the emission source is determined by measuring the time difference of signals arriving at different receiving stations. Its basic principle is to calculate the distance difference using the speed of electromagnetic waves and find the intersection point of the signal source through data from at least three receiving stations. These intersection points are the possible positions of the emission source.

[0080] The implementation process is as follows:

[0081] Each receiving station simultaneously receives signals from the radiation source.

[0082] The receiving station uses a high-precision time synchronization device to measure the arrival time of the signal and calculates the time difference between the signal arriving at different receiving stations.

[0083] Based on the speed of electromagnetic waves (usually assumed to be the speed of light) and the time difference, the distance difference between the signal source and different receiving stations is calculated.

[0084] Using the distance difference information measured by at least three receiving stations, the three-dimensional position of the signal source (i.e., the radiation source device) is calculated by geometric methods (such as hyperbolic positioning method).

[0085] In addition, the FDOA positioning technology can also be applied to determine the position of the emission source by measuring the frequency difference of the signal arriving at different receiving stations. The basic principle is that when there is relative motion between the emission source and the receiving station, the Doppler effect will occur during the signal propagation process, resulting in the received signal frequency being different from the transmitted frequency. By measuring the frequency difference of the signals received by different receiving stations, the rate of change of the distance between the signal source and different receiving stations can be calculated, and then the position of the signal source can be determined.

[0086] The implementation process is as follows:

[0087] Each receiving station simultaneously receives the signal from the radiation source and measures the frequency of the signal.

[0088] The receiving station uses a high-precision frequency measurement device to calculate the frequency difference between the signal arriving at different receiving stations.

[0089] Based on the principle of the Doppler effect and the frequency difference, the rate of change of the distance between the signal source and different receiving stations is calculated.

[0090] Combined with the coordinate information of the receiving station and the satellite ephemeris data, the three-dimensional position and speed of the signal source (i.e., the radiation source device) are determined through complex mathematical calculations (such as the least squares method, the pseudo-linear method, etc.).

[0091] In addition, when implementing TDOA and FDOA positioning. The satellite ephemeris provides the precise position information of the satellite at a specific time point, which is crucial for calculating the path length and time delay of the signal during propagation. The receiving station coordinate information is used to determine the precise position of the receiving station on the Earth's surface, so as to accurately calculate the position of the signal source relative to the receiving station.

[0092] Through the above solution, the radiation source device simultaneously transmits RF signals to the main satellite and the adjacent satellite module. After separate processing by both, the signals are transmitted to the receiving station module. The receiving station uses the adjacent satellite interference suppression algorithm to accurately distinguish and weaken the interference signals from adjacent satellites, significantly improving the recognition rate and purity of the target signals. On this basis, combined with the passive positioning algorithm, the radiation source position can be accurately calculated only based on the received first channelized signal and the signal after interference suppression processing. This not only enhances the signal processing ability in complex electromagnetic environments but also ensures stable and accurate positioning of the radiation source even under strong interference conditions.

[0093] In some embodiments, step 102 includes:

[0094] Step A1, the main satellite uses a preset first channelization channel to perform channel processing on the received RF signal to obtain a first sub-channelized processing signal.

[0095] Step A2, the main satellite uses a preset second channelization channel to perform channel processing on the received RF signal to obtain a second sub-channelized processing signal, and sends the first sub-channelized processing signal and the second sub-channelized processing signal to the receiving station module, where the first channelized signal includes the first sub-channelized processing signal and the second sub-channelized processing signal.

[0096] In the above solution, to effectively process and transmit this information, the main satellite uses channelization technology. Channelization is a technique that divides a broadband RF signal into multiple narrower sub-channels, with each sub-channel carrying a part of the information. This can improve the efficiency and flexibility of signal processing.

[0097] The main satellite is equipped with a preset first channelization channel and a second channelization channel. These two channels may have different frequency ranges, bandwidths, or other parameters to adapt to different types of signals or information requirements.

[0098] When the RF signal passes through the first channelization channel, it is processed into a first sub-channelized processing signal. This process may include steps such as filtering, amplification, and down-conversion to extract the information within a specific frequency range.

[0099] Similarly, when the RF signal passes through the second channelization channel, it is processed into a second sub-channelized processing signal.

[0100] The processed first sub-channelized processing signal and second sub-channelized processing signal are then sent to the receiving station module. The receiving station module may be located on the Earth's surface and is responsible for further processing, decoding, and extracting the information in these signals.

[0101] The received radio frequency signals can be effectively segmented into multiple sub-channels through channelization processing, and these sub-channelized signals are sent to the receiving station for further processing.

[0102] In some embodiments, the neighboring satellite module includes at least a first neighboring satellite and a second neighboring satellite.

[0103] Step 103 includes:

[0104] Step B1: The first neighboring satellite uses a preset third channelization channel to perform channel processing on the received radio frequency signals, obtains third sub-channelized signals, and sends the third sub-channelized signals to the receiving station module.

[0105] Step B2: The second neighboring satellite uses a preset fourth channelization signal to perform channel processing on the received radio frequency signals, obtains fourth sub-channelized signals, and sends the fourth sub-channelized signals to the receiving station module, where the second channelization signal includes the third sub-channelized signals and the fourth sub-channelized signals.

[0106] In the above solution, the first neighboring satellite and the second neighboring satellite each receive radio frequency signals. These radio frequency signals may come from transmitters on the Earth's surface, such as mobile phone base stations, satellite communication ground stations, etc., or from other satellites.

[0107] Channelization processing is the process of dividing radio frequency signals into multiple smaller frequency segments (or called sub-channels). The purpose of this is to more effectively utilize spectrum resources and reduce interference between different signals.

[0108] The first neighboring satellite uses a preset third channelization channel to perform channelization processing on the received radio frequency signals. This means that it divides the radio frequency signals into multiple sub-channels according to specific frequency allocation and filtering techniques, and extracts specific third sub-channelized signals from them.

[0109] Similarly, the second neighboring satellite uses a preset fourth channelization channel to perform channelization processing on the received radio frequency signals, obtaining fourth sub-channelized signals.

[0110] The processed third sub-channelized signals and fourth sub-channelized signals are sent to the receiving station module by the first neighboring satellite and the second neighboring satellite respectively.

[0111] The receiving station module may be a fixed site on the ground or a device on a moving vehicle, and is used to receive and process signals from satellites.

[0112] Through channelization processing, the received radio frequency signals can be effectively segmented and processed, and the processed signals are sent to the receiving station module.

[0113] In some embodiments, in step 104, the receiving station module performs interference suppression processing on the received first channelized signal and the received second channelized signal through an adjacent satellite interference suppression algorithm to obtain an interference suppression processed signal, including:

[0114] Step C1, the receiving station module forms a first signal group by combining the received first sub-channelized processed signal and the received third sub-channelized processed signal, and forms a second signal group by combining the received second sub-channelized processed signal and the received fourth sub-channelized processed signal.

[0115] Step C2, the receiving station module determines the amplitude parameters of the first signal group at different signal frequencies, determines a first target signal frequency range based on the amplitude parameters of the first signal group at different signal frequencies, and performs signal extraction on the first signal group according to the first target signal frequency range to obtain a first interference suppression processed signal.

[0116] Step C3, the receiving station module determines the amplitude parameters of the second signal group at different signal frequencies, determines a second target signal frequency range based on the amplitude parameters of the second signal group at different signal frequencies, and performs signal extraction on the second signal group according to the second target signal frequency range to obtain a second interference suppression processed signal, where the interference suppression processed signal includes the first interference suppression processed signal and the second interference suppression processed signal.

[0117] In the above solution, the receiving station module first receives four sub-channelized processed signals: the first sub-channelized processed signal, the second sub-channelized processed signal, the third sub-channelized processed signal, and the fourth sub-channelized processed signal.

[0118] Then, it combines the received first and third sub-channelized processed signals into a signal set called the first signal group.

[0119] At the same time, it combines the received second and fourth sub-channelized processed signals into another signal set called the second signal group.

[0120] The receiving station module analyzes the amplitude parameters of the first signal group at different signal frequencies. The amplitude parameters generally represent the intensity or magnitude of the signal at different frequencies.

[0121] Based on these amplitude parameters, the receiving station module can determine one or more frequency ranges in which the signal amplitudes are relatively high and may contain useful information, and this range is called the first target signal frequency range.

[0122] After determining the first target signal frequency range, the receiving station module extracts signals from the first signal group, that is, filters out the signals within the first target signal frequency range from the first signal group to obtain the first interference suppression processed signal. This processing may include steps such as filtering and amplification, aiming to extract useful signals and suppress interference signals outside the target frequency range.

[0123] Similarly, the receiving station module also analyzes the amplitude parameters of the second signal group at different signal frequencies.

[0124] Based on these amplitude parameters, determine the second target signal frequency range, and the signals within this range may contain useful information in the second signal group.

[0125] Then, the receiving station module extracts signals from the second signal group to obtain the second interference suppression processed signal. This processing also aims to extract useful signals and suppress interference.

[0126] The two signals obtained in the above process - the first interference suppression processed signal and the second interference suppression processed signal - together constitute the final interference suppression processed signal. These signals have been processed to reduce or eliminate interference signals outside the target frequency range, thereby improving the quality and usability of the signals.

[0127] In summary, this process effectively extracts useful information from multiple sub-channelized processed signals and suppresses interference signals through steps such as grouping, amplitude parameter analysis, determination of the target signal frequency range, and signal extraction.

[0128] In some embodiments, the neighboring satellite module includes at least a first neighboring satellite and a second neighboring satellite, and the second channelized signal includes at least a third sub-channelized processed signal corresponding to the first neighboring satellite and a fourth sub-channelized processed signal corresponding to the second neighboring satellite.

[0129] In step 104, the receiving station module performs interference suppression processing on the received first channelized signal and the received second channelized signal through the adjacent satellite interference suppression algorithm to obtain the interference suppression processed signal, including:

[0130] Step D1, the receiving station module performs signal domain conversion processing on the received third sub-channelized processed signal through the fast Fourier transform algorithm to obtain the third sub-channelized processed signal in the frequency domain.

[0131] Step D2, the receiving station module determines the frequency of the interference signal on the first neighboring satellite, determines the first frequency domain filtering coefficient based on the frequency of the interference signal on the first neighboring satellite, and performs dot product processing on the first frequency domain filtering coefficient and the third sub-channelized processed signal in the frequency domain to obtain the first dot product processed signal.

[0132] Step D3, the receiving station module performs signal domain conversion processing on the first multiplication processing signal through the inverse fast Fourier transform algorithm to obtain the first multiplication processing signal in the time domain.

[0133] Step D4, the receiving station module performs signal domain conversion processing on the received fourth sub-channelized processing signal through the fast Fourier transform algorithm to obtain the fourth sub-channelized processing signal in the frequency domain.

[0134] Step D5, the receiving station module determines the frequency of the interference signal on the second neighboring satellite, determines the second frequency domain filtering coefficient based on the frequency of the interference signal on the second neighboring satellite, and performs multiplication processing on the fourth sub-channelized processing signal in the frequency domain based on the second frequency domain filtering coefficient to obtain the second multiplication processing signal.

[0135] Step D6, the receiving station module performs signal domain conversion processing on the second multiplication processing signal through the inverse fast Fourier transform algorithm to obtain the second multiplication processing signal in the time domain, where the interference suppression processing signal includes the first multiplication processing signal in the time domain and the second multiplication processing signal in the time domain.

[0136] In the above solution, the receiving station module first receives the third sub-channelized processing signal and the fourth sub-channelized processing signal. These signals are initially in the time domain (i.e., the signal changes with time).

[0137] Using the Fast Fourier Transform (FFT) algorithm, the receiving station module converts these two sub-channelized processing signals from the time domain to the frequency domain. The frequency domain represents the change of the signal with frequency.

[0138] In the frequency domain, the receiving station module determines the frequencies of the interference signals from the first neighboring satellite and the second neighboring satellite.

[0139] Based on the frequencies of these interference signals, the receiving station module calculates the first frequency domain filtering coefficient and the second frequency domain filtering coefficient respectively. These filtering coefficients are used to design filters with the aim of suppressing (or reducing) the components of the interference signals in the frequency domain.

[0140] The receiving station module performs multiplication processing on the calculated frequency domain filtering coefficients and the third sub-channelized processing signal and the fourth sub-channelized processing signal in the frequency domain respectively. The multiplication operation is to multiply each frequency component separately, and the result is to obtain two new signals: the first multiplication processing signal and the second multiplication processing signal. These two signals have removed the components of the interference signals in the frequency domain.

[0141] The receiving station module then uses the Inverse Fast Fourier Transform (IFFT) algorithm to convert the first dot product processed signal and the second dot product processed signal from the frequency domain back to the time domain. This is because most communication systems need to process signals in the time domain.

[0142] After the IFFT conversion, the first dot product processed signal in the time domain and the second dot product processed signal in the time domain are obtained. These two signals are the processing results after removing the interference signal components from adjacent satellites. They constitute the interference suppression processed signals, that is, the interference components in these signals have been effectively suppressed, thereby improving the quality and usability of the signals.

[0143] Through the above process, interference signals from adjacent satellites are suppressed in the satellite communication system, improving communication quality and efficiency.

[0144] In some embodiments, in step D2, determining the first frequency domain filtering coefficient based on the frequency of the interference signal on the first adjacent satellite includes:

[0145] The receiving station module determines the first frequency domain filtering coefficient based on the frequency of the interference signal on the first adjacent satellite through the following formula:

[0146]

[0147] Where, represents the first frequency domain filtering coefficient, represents the frequency of the interference signal on the first adjacent satellite, represents the first frequency in the frequency range of the interference signal on the first adjacent satellite, represents the second frequency in the frequency range of the interference signal on the first adjacent satellite, represents the number of interference signals on the first adjacent satellite, represents the order of the interference signals on the first adjacent satellite, represents the order of the adjacent satellites.

[0148] In the above solution, the frequency of the interference signal on the first adjacent satellite refers to the frequency of the signal from the nearest (or the first) satellite that interferes with the receiving station. The interference signal may affect the reception and decoding of the target signal by the receiving station.

[0149] The first frequency domain filtering coefficient is used to filter the received signal in the frequency domain. The filtering coefficient determines which frequencies of the signal will be retained and which will be suppressed or removed. The filtering coefficient is determined based on the frequency of the interference signal, aiming to reduce or eliminate the influence of the interference signal.

[0150] The frequency range of the interference signal refers to the frequency interval that the interference signal may occupy, which is bounded by the first frequency and the second frequency. This range is used to determine the specific value of the filtering coefficient.

[0151] The number of interference signals refers to the total number of interference signals from the first neighboring satellite. This number may affect the calculation and selection of the filtering coefficient because optimization needs to be carried out for multiple interference signals.

[0152] The order of the interference signals refers to the position or number of the interference signals in a certain sorting method.

[0153] The order of the neighboring satellites refers to the position or number of the neighboring satellites in a certain sorting method.

[0154] In summary, this description gives a method for a receiving station module to determine the frequency-domain filtering coefficient based on the frequency of the interference signals from the first neighboring satellite. This method takes into account the frequency range, number, order of the interference signals, and the order of the neighboring satellites, aiming to reduce or eliminate the influence of the interference signals by optimizing the filtering coefficient.

[0155] In some embodiments, in step D5, determining the second frequency-domain filtering coefficient based on the frequency of the interference signals on the second neighboring satellite includes:

[0156] The receiving station module determines the second frequency-domain filtering coefficient based on the frequency of the interference signals on the second neighboring satellite through the following formula:

[0157]

[0158] Where, represents the second frequency-domain filtering coefficient, represents the frequency of the interference signals on the second neighboring satellite, represents the first frequency in the frequency range of the interference signals on the second neighboring satellite, represents the second frequency in the frequency range of the interference signals on the second neighboring satellite, represents the number of the interference signals on the second neighboring satellite, represents the order of the interference signals on the second neighboring satellite, represents the order of the neighboring satellites.

[0159] In the above solution, the frequency of the interference signals on the second neighboring satellite refers to the frequency of the signals from the nearest (or the first) satellite that interfere with the receiving station. The interference signals may affect the reception and decoding of the target signals by the receiving station.

[0160] The second frequency-domain filtering coefficient is used to filter the received signal in the frequency domain. The filtering coefficient determines which frequencies of the signal will be retained and which will be suppressed or removed. The filtering coefficient is determined based on the frequency of the interference signal, with the aim of reducing or eliminating the impact of the interference signal.

[0161] The frequency range of the interference signal refers to the frequency interval that the interference signal may occupy, bounded by the first frequency and the second frequency. This range is used to determine the specific value of the filtering coefficient.

[0162] The number of interference signals refers to the total number of interference signals from the second neighboring satellite. This number may affect the calculation and selection of the filtering coefficient because optimization needs to be carried out for multiple interference signals.

[0163] The order of the interference signals refers to the position or number of the interference signals in a certain sorting method.

[0164] The order of the neighboring satellites refers to the position or number of the neighboring satellites in a certain sorting method.

[0165] In summary, this description presents a method for a receiving station module to determine the frequency-domain filtering coefficient based on the frequency of the interference signals from the second neighboring satellite. This method takes into account the frequency range, number, order of the interference signals, and the order of the neighboring satellites, aiming to reduce or eliminate the impact of the interference signals by optimizing the filtering coefficient.

[0166] In some embodiments, the present application acquires the target signal through the method of off-frequency acquisition, as Figure 5 shown.

[0167] The key point of the present application is:

[0168] It no longer requires the main neighboring satellite to maintain the consistency of the frequency band and sampling rate. Instead, the main satellite and each neighboring satellite form independent signal groups; as Figure 5 above, the main satellite signal and the neighboring satellite 1 signal form the main neighboring 1 signal group; the main satellite signal and the neighboring satellite 2 signal form the main neighboring 2 signal group; within each signal group, the main neighboring satellite performs synchronous acquisition, and the signal bandwidth and sampling rate of the main neighboring satellite within the group are kept consistent; the acquisition bandwidth and sampling rate can be different between different signal groups;

[0169] Within the signal group formed by the main satellite and the neighboring satellite it is possible to flexibly select the target signal to be acquired according to the situation of the interference signal on the neighboring satellite, so as to avoid the impact of the neighboring satellite interference signal.

[0170] The above off-frequency acquisition can be achieved through independent radio frequency receiving channels or through independent channels

[0171] It is implemented through a conversion channel, such as Figure 6 and Figure 7 shown.

[0172] For the interference signal scenario shown above, Figure 3 the acquisition target settings of the signal groups collected at different frequencies are as Figure 8 and Figure 9 shown. It can be seen from the figure that by selecting an appropriate target signal frequency band range, the influence of adjacent satellite interference signals can be effectively avoided.

[0173] It can also be seen from the above figure that for each signal group, the acquired target signal only contains partial frequency components of the actual complete target signal. Therefore, this method implies a premise, that is, for the signal composed of partial frequency components of the target signal, its TDOA and FDOA remain unchanged compared with the original signal. The explanation for this inference is as follows.

[0174] According to the Fourier transform principle, the original complete target signal of the main satellite can be expressed as:

[0175]

[0176] Here represents the coefficients corresponding to different frequency components of the signal, and

[0177] is the signal strength. Assume that after the target signal is relayed by the adjacent satellite and , compared with the signal relayed by the main satellite, its TDOA and FDOA are respectively and

[0178]

[0179] Collecting partial frequencies of the target signal means that in the collected signal, the out-of-band partial frequency components are 0, that is:

[0180]

[0181]

[0182] In the above formula, and are the results of collecting partial frequencies. It is not difficult to see from the above formula that The TDOA and FDOA of relative to are exactly the same as those of relative to

[0183] The off-frequency signal acquisition method proposed in this application can also be applicable to the situation where there are multiple target signals. Taking Figure 10 as an example, it is known that a radiation source emits two signals, but there are interference signals on neighboring satellites respectively, which overlap with one of the target signals in the frequency domain. In this case, the existing signal acquisition method cannot collect effective main and neighboring satellite signals.

[0184] By using the off-frequency acquisition method proposed in this application, the two targets are respectively combined with the signals of neighboring satellite 1 and neighboring satellite 2 to form signal groups, which can avoid the influence of interference signals and achieve effective data acquisition, as shown in Figure 11 and Figure 12 shown.

[0185] In the satellite passive positioning scenario, in order to improve the positioning accuracy, reference stations with known coordinates are usually introduced, and the TDOA and FDOA of the target signal are calibrated by calculating the TDOA and FDOA of the reference signal. As shown in Figure 13 shown.

[0186] In the scenario containing reference stations, the extraction method of the reference signal is exactly the same as that of the target signal. Therefore, the off-frequency signal acquisition method proposed in this application is also applicable to the acquisition and processing of reference signals. The data acquisition and processing method at this time is as shown in Figure 14 shown.

[0187] In addition, this application can also effectively suppress the influence of interference signals on the extraction of target signals through neighboring satellite interference signal suppression, and improve the success rate of target positioning.

[0188] The neighboring satellite interference signal suppression method proposed in this application is as shown in Figure 15 shown. In the figure, the number of neighboring satellite signals is 2. In actual applications, the number of neighboring satellites will vary depending on the application scenario, but the processing method is the same.

[0189] The main and neighboring satellite signals are received by the receiving antenna, and after a series of radio frequency receiving processes such as low-noise amplification and down-conversion, channelized synchronous acquisition is then performed. Channelized synchronous acquisition can be processed by the same device or by different devices separately. After channelized synchronous acquisition, the main satellite signal and the neighboring satellite signal are obtained, where corresponds to different neighboring satellites; the sampling rates of the main and neighboring satellite signals are the same, and the signal start times are the same (or very close).

[0190] The neighboring satellite interference signal suppression is realized by three steps: Fast Fourier Transform (FFT), frequency domain filtering, and Inverse Fast Fourier Transform (IFFT), which are described as follows.

[0191] FFT transform:

[0192] For the signals of neighboring satellites, first perform FFT transform to change the signals from the time domain to the frequency domain:

[0193]

[0194] Here represents the number of signals of neighboring satellites.

[0195] Frequency domain filtering:

[0196] For each signal of neighboring satellites, construct a frequency domain filter, and the stopband of the filter corresponds to the spectrum of the interference signal. Assume there are interference signals on the neighboring satellite , and the start and end frequencies of each interference signal are and , respectively. Then the frequency domain filter coefficients are:

[0197]

[0198] The operation corresponding to frequency domain filtering is the dot product of the frequency domain signals:

[0199]

[0200] Here represents the signal length.

[0201] IFFT transform:

[0202] After the signals of neighboring satellites are filtered in the frequency domain, they need to be transformed back to the time domain for subsequent TDOA / FDOA parameter estimation. The transformation from the frequency domain to the time domain is achieved through IFFT:

[0203]

[0204] Example:

[0205] Assume that the signal spectra of the main satellite, neighboring satellite 1, and neighboring satellite 2 are as shown in the following figure. It can be seen from Figure 16 that there are interference signals in the frequency bands of the main satellite signals for both neighboring satellite 1 and neighboring satellite 2.

[0206] Receive and synchronously collect the main and neighboring satellite signals, with the acquisition duration set to 1 second and the sampling rate , corresponding to the length of the main and neighboring satellite signals being sample points.

[0207] The frequency domain filter coefficients of neighboring satellite 1 and neighboring satellite 2 are set as shown in Figure 17 and Figure 18 , respectively, and the filter coefficients corresponding to the interference signal spectra are 0.

[0208] Set the signal-to-noise ratio (SNR) of the target signal on the main satellite to 10 dB, and the SNR of the target signal on neighboring satellite 1 and neighboring satellite 2 to -40 dB. The Cross Ambiguity Function (CAF) method is used to detect the target signal, and the results are as Figure 19 and Figure 20 shown.

[0209] In the above figure, the point with the x-coordinate of 100 is the effective CAF value when the target signal is aligned with the neighboring satellite signal in time. It can be seen from the figure that if the direct correlation calculation is performed on the main neighboring satellite, the obtained CAF value does not have a correct peak, so the target signal cannot be extracted; after suppressing the neighboring satellite interference signal using the solution of this application, the obtained CAF peak is 4 - 5 dB higher than the direct cross-correlation, and an obvious and effective CAF peak can be seen. Thus, it can be seen that the method for suppressing neighboring satellite interference signals proposed in this application can effectively improve the detection rate of the target signal, thereby improving the success rate of target positioning in the radiation source satellite positioning scenario.

[0210] It should be noted that the method of the embodiments of this application can be executed by a single device, such as a computer or a server, etc. The method of this embodiment can also be applied to a distributed scenario and completed by multiple devices cooperating with each other. In this case of a distributed scenario, one of the multiple devices can only execute one or more steps of the method of the embodiments of this application, and these multiple devices will interact with each other to complete the method.

[0211] It should be noted that some embodiments of this application have been described above. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be executed in a different order from that in the above embodiments and still achieve the desired result. Additionally, the processes depicted in the drawings do not necessarily require the specific order or sequential order shown to achieve the desired result. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0212] Based on the same inventive concept, corresponding to the method of any of the above embodiments, this application also provides a positioning device for a radiation source.

[0213] Referring to Figure 21 , for the positioning device of the radiation source, the device is arranged in a positioning system of the radiation source, the system includes a radiation source device, a main satellite, a neighboring satellite module, and a receiving station module, and the device includes:

[0214] A radiation source device 2101, configured to send a radio frequency signal to the main satellite and send a radio frequency signal to the neighboring satellite module;

[0215] The main satellite 2102 is configured to perform channel processing on the received radio frequency signal to obtain a first channelized signal, and transmit the first channelized signal to the receiving station module;

[0216] The adjacent satellite module 2103 is configured to perform channel processing on the received radio frequency signal to obtain a second channelized signal, and transmit the second channelized signal to the receiving station module;

[0217] The receiving station module 2104 is configured to perform interference suppression processing on the received first channelized signal and the received second channelized signal through an adjacent satellite interference suppression algorithm to obtain an interference suppression processed signal, and perform positioning processing on the received first channelized signal and the interference suppression processed signal through a passive positioning algorithm to obtain the position of the radiation source device.

[0218] For the convenience of description, when describing the above device, various modules are described separately according to their functions. Of course, when implementing the present application, the functions of each module can be implemented in one or more software and / or hardware.

[0219] The device in the above embodiment is used to implement the corresponding radiation source positioning device method in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiments, which will not be elaborated here.

[0220] Based on the same inventive concept, corresponding to the method in any of the above embodiments, the present application further provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements the radiation source positioning device method in any of the above embodiments.

[0221] Figure 22 FIG. shows a more specific schematic diagram of the hardware structure of the electronic device provided in this embodiment. The device may include: a processor 1010, a memory 1020, an input / output interface 1030, a communication interface 1040, and a bus 1050. Among them, the processor 1010, the memory 1020, the input / output interface 1030, and the communication interface 1040 are communicatively connected to each other inside the device through the bus 1050.

[0222] The processor 1010 can be implemented in a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, etc., and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0223] The memory 1020 can be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage devices, dynamic storage devices, etc. The memory 1020 can store an operating system and other application programs. When implementing the technical solutions provided in the embodiments of this specification through software or firmware, the relevant program codes are stored in the memory 1020 and called and executed by the processor 1010.

[0224] The input / output interface 1030 is used to connect to the input / output module to achieve information input and output. The input / output module can be configured as a component in the device (not shown in the figure) or externally connected to the device to provide corresponding functions. Among them, the input devices can include keyboards, mice, touchscreens, microphones, various sensors, etc., and the output devices can include displays, speakers, vibrators, indicator lights, etc.

[0225] The communication interface 1040 is used to connect to a communication module (not shown in the figure) to achieve communication and interaction between this device and other devices. Among them, the communication module can achieve communication through wired means (such as USB, network cable, etc.) or through wireless means (such as mobile network, WIFI, Bluetooth, etc.).

[0226] The bus 1050 includes a path for transmitting information between various components of the device (such as the processor 1010, the memory 1020, the input / output interface 1030, and the communication interface 1040).

[0227] It should be noted that although the above device only shows the processor 1010, the memory 1020, the input / output interface 1030, the communication interface 1040, and the bus 1050, in the specific implementation process, the device may also include other components necessary for normal operation. In addition, those skilled in the art can understand that the above device may also only include the components necessary to implement the solution of the embodiments of this specification, and do not have to include all the components shown in the figure.

[0228] The electronic device of the above embodiment is used to implement the corresponding radiation source positioning device method in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiments, which will not be elaborated here.

[0229] Based on the same inventive concept, corresponding to the method of any of the above embodiments, the present application also provides a non-transitory computer-readable storage medium. The non-transitory computer-readable storage medium stores computer instructions, and the computer instructions are used to cause a computer to execute the radiation source positioning device method of any of the above embodiments.

[0230] The computer-readable medium of this embodiment includes permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. The information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassette tapes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information accessible by a computing device.

[0231] The computer instructions stored in the storage medium of the above embodiment are used to cause a computer to execute the method of the positioning device of the radiation source in any of the above embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be elaborated here.

[0232] Those of ordinary skill in the art should understand that: the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the present application is limited to these examples; under the concept of the present application, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the embodiments of the present application as above, which are not provided in detail for the sake of brevity.

[0233] In addition, for simplicity of explanation and discussion, and in order not to make the embodiments of the present application difficult to understand, the well-known power / ground connections to integrated circuit (IC) chips and other components may or may not be shown in the provided drawings. In addition, the device may be shown in block diagram form to avoid making the embodiments of the present application difficult to understand, and this also takes into account the fact that the details of the implementation of these block diagram devices are highly dependent on the platform on which the embodiments of the present application are to be implemented (i.e., these details should be completely within the understanding of those skilled in the art). In the case where specific details (such as circuits) are set forth to describe the exemplary embodiments of the present application, it will be apparent to those skilled in the art that the embodiments of the present application can be implemented without these specific details or with variations of these specific details. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0234] Although the present application has been described in connection with specific embodiments thereof, many alternatives, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art in light of the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may be used with the embodiments discussed.

[0235] Embodiments of the present application are intended to cover all such alternatives, modifications, and variations that fall within the broad scope of the present application. Accordingly, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the embodiments of the present application shall be included within the protection scope of the present application.

Claims

1. A method for locating a radiation source, characterized in that: A positioning system applied to a radiation source, the system comprising a radiation source device, a main satellite, an adjacent satellite module and a receiving station module, the method comprising: The radiation source device sends a radio frequency signal to the main satellite and sends a radio frequency signal to the adjacent satellite module; The main satellite performs channel processing on the received radio frequency signal to obtain a first channelized signal, and transmits the first channelized signal to the receiving station module; the main satellite performs channel processing on the received radio frequency signal to obtain a first channelized signal, and transmits the first channelized signal to the receiving station module, including: The main satellite performs channel processing on the received radio frequency signal using a preset first channelized channel to obtain a first sub-channelized processed signal; The main satellite performs channel processing on the received radio frequency signal using a preset second channelized channel to obtain a second sub-channelized processed signal, and sends the first sub-channelized processed signal and the second sub-channelized processed signal to the receiving station module, wherein the first channelized signal includes the first sub-channelized processed signal and the second sub-channelized processed signal; The adjacent satellite module performs channel processing on the received radio frequency signal to obtain a second channelized signal, and transmits the second channelized signal to the receiving station module; the adjacent satellite module includes at least a first adjacent satellite and a second adjacent satellite; The adjacent satellite module performs channel processing on the received radio frequency signal to obtain a second channelized signal, and transmits the second channelized signal to the receiving station module, including: The first adjacent satellite performs channel processing on the received radio frequency signal using a preset third channelized channel to obtain a third sub-channelized processed signal, and sends the third sub-channelized processed signal to the receiving station module; The second adjacent satellite performs channel processing on the received radio frequency signal using a preset fourth channelized processing signal to obtain a fourth sub-channelized processing signal, and sends the fourth sub-channelized processing signal to the receiving station module, wherein the second channelized signal includes the third sub-channelized processing signal and the fourth sub-channelized processing signal; The receiving station module performs interference suppression processing through a neighboring satellite interference suppression algorithm based on the received first channelized signal and the received second channelized signal to obtain an interference suppression processing signal, and performs positioning processing through a passive positioning algorithm based on the received first channelized signal and the interference suppression processing signal to obtain the position of the radiation source device.

2. The method according to claim 1, characterized in that The receiving station module performs interference suppression processing based on the received first channelized signal and the received second channelized signal through a neighboring satellite interference suppression algorithm to obtain an interference suppression processing signal, including: The receiving station module forms a first signal group with the received first sub-channelized processed signal and the received third sub-channelized processed signal, and forms a second signal group with the received second sub-channelized processed signal and the received fourth sub-channelized processed signal; The receiving station module determines the amplitude parameters of the first signal group at different signal frequencies, determines the first target signal frequency range based on the amplitude parameters of the first signal group at different signal frequencies, and performs signal extraction on the first signal group according to the first target signal frequency range to obtain a first interference suppression processing signal; The receiving station module determines the amplitude parameters of the second signal group at different signal frequencies, determines the second target signal frequency range based on the amplitude parameters of the second signal group at different signal frequencies, and extracts the second signal group according to the second target signal frequency range to obtain a second interference suppression processing signal, wherein the interference suppression processing signal includes a first interference suppression processing signal and a second interference suppression processing signal.

3. The method according to claim 1, characterized in that The neighboring satellite module includes at least a first neighboring satellite and a second neighboring satellite, and the second channelized signal includes at least a third sub-channelized processed signal corresponding to the first neighboring satellite and a fourth sub-channelized processed signal corresponding to the second neighboring satellite; The receiving station module performs interference suppression processing based on the received first channelized signal and the received second channelized signal through a neighboring satellite interference suppression algorithm to obtain an interference suppression processing signal, including: The receiving station module performs signal domain conversion processing on the received third sub-channelized processed signal through a fast Fourier transform algorithm to obtain the third sub-channelized processed signal in the frequency domain; The receiving station module determines the frequency of the interference signal on the first adjacent satellite, determines a first frequency domain filter coefficient based on the frequency of the interference signal on the first adjacent satellite, and performs a point multiplication process based on the first frequency domain filter coefficient and the third sub-channelized processed signal in the frequency domain to obtain a first point multiplication processed signal; The receiving station module performs signal domain conversion processing based on the first point product processing signal through an inverse fast Fourier transform algorithm to obtain a first point product processing signal in the time domain; The receiving station module performs signal domain conversion processing on the received fourth sub-channelized processed signal through a fast Fourier transform algorithm to obtain a fourth sub-channelized processed signal in the frequency domain; The receiving station module determines the frequency of the interference signal on the second adjacent satellite, determines a second frequency domain filter coefficient based on the frequency of the interference signal on the second adjacent satellite, and performs a point multiplication process based on the second frequency domain filter coefficient and the fourth sub-channelized processed signal in the frequency domain to obtain a second point multiplication processed signal; The receiving station module performs signal domain conversion processing based on the second point product processed signal through the inverse fast Fourier transform algorithm to obtain a second point product processed signal in the time domain, wherein the interference suppression processed signal includes the first point product processed signal in the time domain and the second point product processed signal in the time domain.

4. The method according to claim 3, characterized in that The determining of the first frequency domain filter coefficient based on the frequency of the interference signal on the first adjacent satellite comprises: The receiving station module determines the first frequency domain filter coefficient based on the frequency of the interference signal on the first adjacent satellite by the following formula: in, represents the first frequency domain filter coefficient, represents the frequency of the interfering signal on the first adjacent satellite, a first frequency in a range of frequencies representing an interfering signal on a first neighboring satellite, a second frequency in the frequency range representing an interfering signal on a first neighboring satellite, represents the number of interfering signals on the first adjacent satellite, represents the order of the interfering signal on the first adjacent satellite, Indicates the order of neighboring satellites.

5. The method according to claim 3, characterized in that: The determining of the second frequency domain filter coefficient based on the frequency of the interference signal on the second adjacent satellite comprises: The receiving station module determines the second frequency domain filter coefficient based on the frequency of the interference signal on the second adjacent satellite by the following formula: in, represents the second frequency domain filter coefficient, represents the frequency of the interfering signal on the second adjacent satellite, a first frequency in a range of frequencies representing an interfering signal on a second neighboring satellite, a second frequency in the frequency range representing an interfering signal on a second neighboring satellite, represents the number of interfering signals on the second adjacent satellite, represents the order of the interfering signal on the second adjacent satellite, Indicates the order of neighboring satellites.

6. A radiation source positioning device, characterized in that: The device is arranged in a positioning system of a radiation source, the system comprising a radiation source device, a main satellite, an adjacent satellite module and a receiving station module, and the device comprises: A radiation source device configured to send a radio frequency signal to a primary satellite and to send a radio frequency signal to an adjacent satellite module; A main satellite is configured to perform channel processing on a received radio frequency signal to obtain a first channelized signal, and transmit the first channelized signal to a receiving station module; the main satellite performs channel processing on the received radio frequency signal to obtain a first channelized signal, and transmits the first channelized signal to the receiving station module, for the main satellite to perform channel processing on the received radio frequency signal using a preset first channelized channel to obtain a first sub-channelized processed signal; the main satellite performs channel processing on the received radio frequency signal using a preset second channelized channel to obtain a second sub-channelized processed signal, and sends the first sub-channelized processed signal and the second sub-channelized processed signal to the receiving station module, wherein the first channelized signal includes the first sub-channelized processed signal and the second sub-channelized processed signal; The adjacent satellite module is configured to perform channel processing on the received radio frequency signal to obtain a second channelized signal, and transmit the second channelized signal to the receiving station module; the adjacent satellite module includes at least a first adjacent satellite and a second adjacent satellite; the adjacent satellite module performs channel processing on the received radio frequency signal to obtain a second channelized signal, and transmits the second channelized signal to the receiving station module, and is used for: the first adjacent satellite performs channel processing on the received radio frequency signal using a preset third channelized channel to obtain a third sub-channelized processed signal, and sends the third sub-channelized processed signal to the receiving station module; the second adjacent satellite performs channel processing on the received radio frequency signal using a preset fourth channelized processed signal to obtain a fourth sub-channelized processed signal, and sends the fourth sub-channelized processed signal to the receiving station module, wherein the second channelized signal includes the third sub-channelized processed signal and the fourth sub-channelized processed signal; The receiving station module is configured to perform interference suppression processing through a neighboring satellite interference suppression algorithm based on the received first channelized signal and the received second channelized signal to obtain an interference suppression processing signal, and perform positioning processing through a passive positioning algorithm based on the received first channelized signal and the interference suppression processing signal to obtain the position of the radiation source device.

7. An electronic device comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that: When the processor executes the program, the method according to any one of claims 1 to 5 is implemented.

8. A non-transitory computer-readable storage medium storing computer instructions, characterized in that: The computer instructions are used to enable a computer to execute the method according to any one of claims 1 to 5.

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