Gsm-r intermodulation interference automatic positioning method and device

Abstract

The application provides a GSM-R intermodulation interference automatic positioning method and device, relates to the technical field of railway wireless communication interference dynamic detection, and the method comprises the following steps: receiving radio signals along a railway through a GSM-R antenna installed on a dynamic detection vehicle; performing spectrum analysis and sweep decoding on the radio signals to obtain spectrum analysis results, IQ data and decoding results; performing radio noise evaluation and signal detection based on the spectrum analysis results, performing correlation analysis on signal frequency, bandwidth, power and periodic relationship in combination with the IQ data, identifying intermodulation interference signals, and obtaining intermodulation interference identification result data; obtaining positioning information through an Ethernet, combining the intermodulation interference identification result data and the decoding results, querying intermodulation interference cell attribute information through a ledger, obtaining intermodulation interference information data, and performing real-time display on the current position of the dynamic detection vehicle and the intermodulation interference information data.

Description

Technical Field

[0001] This invention relates to the field of dynamic detection technology for railway wireless communication interference, and more particularly to an automatic location method and device for GSM-R intermodulation interference. Background Technology

[0002] This section is intended to provide background or context for embodiments of the present invention. The description herein is not intended to imply that it is prior art simply because it is included in this section.

[0003] The electromagnetic environment in which GSM-R networks operate is becoming increasingly complex, and the risk of electromagnetic interference is rising daily. With the expansion of high-speed rail networks, the number of crossings, intersections, and parallel runs between lines is constantly increasing. In hubs and intersection / parallel run areas, frequency reuse distances are further compressed, and frequency occupancy is significantly increased. Public network operators are deploying GSM systems in adjacent frequency bands along railway lines, generally using higher transmission power to improve passenger network service quality. Since 2016, public network operators have begun refarming their 900MHz band and deploying IoT systems in adjacent frequency bands of GSM-R systems. In summary, the risk of intermodulation interference to GSM-R networks has significantly increased. However, current railway wireless communication interference detection suffers from the following problems: insufficient intermodulation interference detection capabilities, low identification accuracy, and reliance on manual experience. Therefore, research on automatic GSM-R intermodulation interference localization methods is urgently needed.

[0004] Currently, research on existing intermodulation interference identification methods shows a trend of multi-technology integration: traditional methods mainly rely on spectrum analysis, which depends on human experience, has poor real-time performance, and low identification accuracy; signal processing-based methods (such as higher-order statistics and wavelet transform) enhance nonlinear feature extraction through time-frequency characteristics, but face limitations in computational complexity and environmental adaptability; machine learning and deep learning achieve automatic mining of high-dimensional features through data-driven approaches, which significantly improves the identification accuracy in complex scenarios, but require massive amounts of data and computing power.

[0005] In summary, there is an urgent need for a technical solution that can overcome the above-mentioned defects and improve the dynamic detection capability of GSM-R intermodulation interference. Summary of the Invention

[0006] To address the problems of existing technologies, this invention proposes an automatic GSM-R intermodulation interference localization method and device. In the dynamic detection process of railway wireless communication, the identification of GSM-R intermodulation interference only relies on the frequency relationship of the signal, resulting in low accuracy, dependence on manual experience, and a lack of automatic localization. To address this, the proposed automatic GSM-R intermodulation interference localization method and device uses a real-time spectrum analyzer and a frequency sweep analyzer to process the radio signal, acquiring spectrum, IQ, and decoding data. It employs rapid radio noise assessment and signal detection methods to obtain signal frequency, power, and bandwidth data, sequentially performing correlation analysis of signal frequency, power, bandwidth, and periodicity, and combining this with log data to accurately locate intermodulation interference, thus solving the problems of low accuracy and low efficiency in GSM-R intermodulation interference identification.

[0007] In a first aspect of the present invention, an automatic location method for GSM-R intermodulation interference is proposed, the method comprising:

[0008] Radio signals along the railway line are received by a GSM-R antenna installed on the dynamic inspection vehicle;

[0009] The radio signal is subjected to spectrum analysis and frequency sweep decoding to obtain spectrum analysis results, IQ data and decoding results;

[0010] Radio noise assessment and signal detection are performed based on spectrum analysis results. IQ data are combined to perform correlation analysis on the relationship between signal frequency, bandwidth, power and period, and intermodulation interference signals are identified to obtain intermodulation interference identification result data.

[0011] The location information is obtained through Ethernet, combined with the intermodulation interference identification results and decoding results, and the intermodulation interference cell attribute information is queried through the ledger to obtain intermodulation interference information data. The current location of the dynamic detection vehicle and the intermodulation interference information data are displayed in real time.

[0012] In a second aspect of the present invention, an automatic location device for GSM-R intermodulation interference is provided, the device comprising:

[0013] The GSM-R antenna is mounted on the roof of the dynamic inspection vehicle to receive radio signals along the railway line.

[0014] The signal analysis module is used to perform spectrum analysis and frequency sweep decoding on the radio signal to obtain spectrum analysis results, IQ data and decoding results;

[0015] The control and operation module is used to perform radio noise assessment and signal detection based on spectrum analysis results, and to perform correlation analysis on the relationship between signal frequency, bandwidth, power and period by combining IQ data and to identify intermodulation interference signals, thereby obtaining intermodulation interference identification result data.

[0016] Location information is obtained via Ethernet, combined with intermodulation interference identification and decoding results, and intermodulation interference cell attribute information is queried through the ledger to obtain intermodulation interference information data;

[0017] The display module is used to display the current position of the dynamic detection vehicle and intermodulation interference information data in real time.

[0018] In a third aspect of the present invention, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement an automatic localization method for GSM-R intermodulation interference.

[0019] In a fourth aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium storing a computer program that, when executed by a processor, implements a method for automatic location of GSM-R intermodulation interference.

[0020] In a fifth aspect of the present invention, a computer program product is provided, the computer program product comprising a computer program that, when executed by a processor, implements a method for automatic location of GSM-R intermodulation interference.

[0021] This invention proposes an automatic GSM-R intermodulation interference localization method and device. Based on a dynamic detection vehicle platform, it employs a dedicated GSM-R antenna, a real-time spectrum analyzer, and a frequency sweeper to acquire radio signals, perform spectrum analysis, decode cell information, and obtain IQ data. Based on this data, it analyzes the correlation between signal frequency, power, bandwidth, and periodicity to identify intermodulation interference, thus achieving automatic localization of GSM-R intermodulation interference. The analysis of signal bandwidth, power, and periodicity based on signal frequency relationship determination significantly improves the accuracy of intermodulation interference identification and reduces the probability of false alarms. The introduction of IQ data acquisition and analysis capabilities addresses the lack of signal time-domain feature analysis capabilities in traditional intermodulation interference identification methods, providing strong support for accurate intermodulation interference localization. The use of a real-time spectrum analyzer for radio signal acquisition ensures the integrity of the acquired signals and effectively avoids missed detection of intermodulation interference signals in dynamic detection scenarios. Considering the characteristics of railway dedicated frequency usage, a rapid radio noise assessment method is proposed, enabling rapid measurement of radio noise in dynamic detection scenarios for railway wireless communication, assisting in signal detection and intermodulation interference identification. Empirical Mode Decomposition (EMD) algorithms are employed to preprocess spectral data, reducing the impact of non-stationarity caused by radio signal propagation and reception in high-speed mobile scenarios and improving the robustness of characteristic parameter extraction such as bandwidth during signal detection. Based on IQ data, the time-domain waveform data of the analyzed signal is accurately extracted, and signal power estimation is performed on data during signal transmission. This enables precise signal power estimation, effectively avoiding the risk of power correlation analysis failure, and providing strong technical support for dynamic detection of interference in railway wireless communication. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic flowchart of an embodiment of the GSM-R intermodulation interference automatic location method according to the present invention.

[0024] Figure 2 This is a schematic diagram of the architecture of an automatic location device for GSM-R intermodulation interference according to an embodiment of the present invention.

[0025] Figure 3 This is a schematic diagram of the actual scenario architecture relationship of a specific embodiment of the present invention.

[0026] Figure 4 This is a schematic flowchart of an automatic location method for GSM-R intermodulation interference according to a specific embodiment of the present invention.

[0027] Figure 5 This is a schematic diagram of a computer device structure according to an embodiment of the present invention. Detailed Implementation

[0028] The principles and spirit of the invention will now be described with reference to several exemplary embodiments. It should be understood that these embodiments are given merely to enable those skilled in the art to better understand and implement the invention, and are not intended to limit the scope of the invention in any way. Rather, these embodiments are provided to make this disclosure more thorough and complete, and to fully convey the scope of this disclosure to those skilled in the art.

[0029] Those skilled in the art will recognize that embodiments of the present invention can be implemented as a system, apparatus, device, method, or computer program product. Therefore, this disclosure can be specifically implemented in the following forms: entirely hardware, entirely software (including firmware, resident software, microcode, etc.), or a combination of hardware and software.

[0030] According to embodiments of the present invention, an automatic location method and apparatus for GSM-R intermodulation interference are proposed, relating to the field of dynamic detection technology for railway wireless communication interference. To improve the dynamic detection capability of GSM-R intermodulation interference, this invention proposes a GSM-R intermodulation interference identification method for dynamic detection scenarios in railway wireless communication, achieving accurate location of GSM-R intermodulation interference.

[0031] The principles and spirit of the present invention will be explained in detail below with reference to several representative embodiments.

[0032] Figure 1 This is a schematic flowchart of an embodiment of the GSM-R intermodulation interference automatic location method according to the present invention. Figure 1 As shown, the method includes:

[0033] S101 receives radio signals along the railway line via a GSM-R antenna installed on the dynamic inspection vehicle;

[0034] S102, Perform spectrum analysis and frequency sweep decoding on the radio signal to obtain spectrum analysis results, IQ data and decoding results;

[0035] S103 performs radio noise assessment and signal detection based on spectrum analysis results, and combines IQ data to perform correlation analysis on the relationship between signal frequency, bandwidth, power and period, and identify intermodulation interference signals to obtain intermodulation interference identification result data.

[0036] S104 obtains positioning information via Ethernet, combines intermodulation interference identification results and decoding results, and queries intermodulation interference cell attribute information through the ledger to obtain intermodulation interference information data, and displays the current location of the dynamic detection vehicle and intermodulation interference information data in real time.

[0037] To provide a clearer explanation of the above-mentioned automatic location method for GSM-R intermodulation interference, each step will be described in detail below.

[0038] In one embodiment, for S101, receiving radio signals along the railway line via a GSM-R antenna installed on the dynamic inspection vehicle includes:

[0039] The GSM-R antenna installed on the roof of the dynamic inspection vehicle is used to receive radio signals along the railway line and radio signals in adjacent frequency bands; wherein, the GSM-R antenna operates in the GSM-R frequency band.

[0040] In one embodiment, for S102, spectrum analysis and frequency sweep decoding are performed on the radio signal to obtain spectrum analysis results, IQ data, and decoding results, including:

[0041] The radio signals received by the GSM-R antenna are input to the real-time spectrum analyzer and the frequency sweeper via a feeder.

[0042] A real-time spectrum analyzer was used to perform spectrum analysis on radio signals in the GSM-R band and adjacent bands to obtain spectrum analysis results and IQ data.

[0043] The GSM-R and GSM cell information in the received signals of the GSM-R band and adjacent frequency bands are decoded using a frequency sweeper, and the decoding parameters are extracted to obtain the decoding results.

[0044] In one embodiment, for S103, radio noise assessment and signal detection are performed based on the spectrum analysis results. IQ data is used to perform correlation analysis on the signal frequency, bandwidth, power, and periodicity to identify intermodulation interference signals, resulting in intermodulation interference identification result data, including:

[0045] Radio noise assessment of the GSM-R band was conducted based on the spectrum analysis results, and radio noise assessment data was obtained.

[0046] Based on the spectrum analysis results, the empirical mode decomposition algorithm is used to process and reconstruct the spectrum data, and combined with the radio noise assessment results, signal detection is performed to obtain the signal center frequency, signal power, and bandwidth data.

[0047] Based on the center frequency of the signal, frequency relationship identification is performed to obtain frequency intermodulation data;

[0048] Intermodulation signal identification is performed based on the frequency intermodulation data and signal power and bandwidth data to obtain suspected intermodulation signal data.

[0049] Based on the suspected intermodulation signal data, IQ data of the intermodulation signal is extracted by combining IQ monitoring data, and intermodulation interference is identified to obtain intermodulation interference identification result data.

[0050] In one embodiment, for S104, location information is obtained via Ethernet, combined with intermodulation interference identification result data and decoding result, and intermodulation interference cell attribute information is queried through the ledger to obtain intermodulation interference information data. The current location of the dynamic detection vehicle and the intermodulation interference information data are displayed in real time, including:

[0051] Location information is obtained via Ethernet, and intermodulation interference identification results are combined with key parameters and the intermodulation interference cell line, name, and location information are queried through the ledger to obtain intermodulation interference information data. The intermodulation interference information data is then output to the system controller via Ethernet.

[0052] The system controller displays the current location of the dynamic detection vehicle and intermodulation interference information in real time on the GIS via a monitor.

[0053] After introducing the method of exemplary embodiments of the present invention, the following references are made. Figure 2 An exemplary embodiment of the GSM-R intermodulation interference automatic location device of the present invention will be described.

[0054] The implementation of the GSM-R intermodulation interference automatic location device can refer to the implementation of the above method, and repeated details will not be elaborated further. The terms "module" or "unit" used below can refer to a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0055] Based on the same inventive concept, this invention also proposes an automatic location device for GSM-R intermodulation interference, such as... Figure 2 As shown, the device includes:

[0056] GSM-R antenna 210, mounted on the roof of the dynamic inspection vehicle, is used to receive radio signals along the railway line;

[0057] Signal analysis module 220 is used to perform spectrum analysis and frequency sweep decoding on the radio signal to obtain spectrum analysis results, IQ data and decoding results;

[0058] The control and operation module 230 is used to perform radio noise assessment and signal detection based on spectrum analysis results, and to perform correlation analysis on the relationship between signal frequency, bandwidth, power and period by combining IQ data and to identify intermodulation interference signals, thereby obtaining intermodulation interference identification result data.

[0059] Location information is obtained via Ethernet, combined with intermodulation interference identification and decoding results, and intermodulation interference cell attribute information is queried through the ledger to obtain intermodulation interference information data;

[0060] Display module 240 is used to display the current position of the dynamic detection vehicle and intermodulation interference information data in real time.

[0061] In one embodiment, the GSM-R antenna 210 is specifically used to: receive radio signals along the railway line and radio signals in adjacent frequency bands; wherein the GSM-R antenna operates in the GSM-R frequency band.

[0062] In one embodiment, the signal analysis module 220 includes at least: a real-time spectrum analyzer and a frequency sweep analyzer;

[0063] The radio signals received by the GSM-R antenna are input to a real-time spectrum analyzer and a frequency sweeper via a feeder.

[0064] A real-time spectrum analyzer was used to perform spectrum analysis on radio signals in the GSM-R band and adjacent bands to obtain spectrum analysis results and IQ data.

[0065] The GSM-R and GSM cell information in the received signals of the GSM-R band and adjacent frequency bands are decoded using a frequency sweeper, and the decoding parameters are extracted to obtain the decoding results.

[0066] In one embodiment, the control calculation module 230 is specifically used for:

[0067] Radio noise assessment of the GSM-R band was conducted based on the spectrum analysis results, and radio noise assessment data was obtained.

[0068] Based on the spectrum analysis results, the empirical mode decomposition algorithm is used to process and reconstruct the spectrum data, and combined with the radio noise assessment results, signal detection is performed to obtain the signal center frequency, signal power, and bandwidth data.

[0069] Based on the center frequency of the signal, frequency relationship identification is performed to obtain frequency intermodulation data;

[0070] Intermodulation signal identification is performed based on the frequency intermodulation data and signal power and bandwidth data to obtain suspected intermodulation signal data.

[0071] Based on the suspected intermodulation signal data, IQ data of the intermodulation signal is extracted by combining IQ monitoring data, and intermodulation interference is identified to obtain intermodulation interference identification result data.

[0072] In one embodiment, the control calculation module 230 is further specifically used for:

[0073] Location information is obtained via Ethernet. Combined with intermodulation interference identification results data, key parameters are decoded and the intermodulation interference cell line, name, and location information are queried through the ledger to obtain intermodulation interference information data. The intermodulation interference information data is then output to the system controller via Ethernet.

[0074] In one embodiment, the display module 240 is specifically used for:

[0075] The current location of the dynamic detection vehicle and intermodulation interference information data are displayed in real time on the GIS via a monitor.

[0076] It should be noted that although several modules of the GSM-R intermodulation interference automatic location device are mentioned in the detailed description above, this division is merely exemplary and not mandatory. In fact, according to embodiments of the present invention, the features and functions of two or more modules described above can be embodied in one module. Conversely, the features and functions of one module described above can be further divided and embodied by multiple modules.

[0077] refer to Figure 3 This is a schematic diagram of the actual scenario architecture relationship of a specific embodiment of the present invention. Figure 3 As shown, the present invention receives GSM-R band and adjacent frequency band radio signals along the railway line through a GSM-R antenna 310 installed on the roof of the dynamic inspection vehicle.

[0078] The received signal is scanned by a 2G frequency sweeper 320, and the received signal is analyzed by a real-time spectrum analyzer 330. The GSM-R and GSM cell information is decoded, and the spectrum, IQ and decoding results are sent to the real-time processing unit 340 via Ethernet.

[0079] Secondly, the real-time processing unit 340 performs radio noise assessment and signal detection based on spectrum data, and combines IQ data to perform correlation analysis on the signal frequency, bandwidth, power, and periodicity relationships to identify intermodulation interference signals. Next, the real-time processing unit 340 receives location information via Ethernet and obtains GSM-R intermodulation interference cell attribute information from a ledger. The location information can be obtained through a location information interface.

[0080] Finally, the system controller 350 receives intermodulation interference information via Ethernet and displays the intermodulation interference-related information on a map in real time via the system display 360.

[0081] In practical applications, the system power supply 370 is connected via the AC220 interface to provide power to the GSM-R intermodulation interference device.

[0082] The automatic location of GSM-R intermodulation interference is described in detail below with reference to a specific embodiment. Figure 4 This is a schematic diagram of the automatic location method for GSM-R intermodulation interference according to a specific embodiment of the present invention.

[0083] The working principle and steps of the GSM-R intermodulation interference method and device are as follows:

[0084] Step S1: Receive radio signals along the railway line using a dedicated GSM-R antenna installed on the roof of the dynamic inspection vehicle, and transmit the radio signals to the interior of the dynamic inspection vehicle via a feeder.

[0085] Among them, "dynamic inspection vehicle" refers to railway-specific inspection vehicles, mainly including high-speed comprehensive inspection trains and electrical inspection vehicles, which are used to inspect the status of communication infrastructure along high-speed railways and conventional railways, respectively.

[0086] Among them, the GSM-R dedicated antenna is an antenna that operates in the GSM-R frequency band, has a special structure, is adapted to the high-speed operation environment of trains, and is installed on the top of the train. The operating frequency range of this antenna is 870MHz-960MHz.

[0087] Step S2: The signal received by the GSM-R dedicated antenna is input to the real-time spectrum analyzer and frequency sweeper via the feeder;

[0088] Among them, a real-time spectrum analyzer refers to a high-performance spectrum analyzer. Because this type of instrument has powerful spectrum analysis capabilities, and the spectrum analysis time is shorter than the radio signal acquisition time, it can intercept radio signals with a 100% probability. This method effectively guarantees the ability to capture intermodulation interference. It also has IQ data output functionality.

[0089] Among them, the frequency sweeper is a special instrument with the ability to decode wireless communication cell information broadcast information, and supports communication standards such as GSM-R and GSM.

[0090] Step S3: The real-time spectrum analyzer performs spectrum analysis on the radio signals in the GSM-R band and adjacent bands, and outputs the spectrum measurement data and IQ data to the real-time processing unit via Gigabit Ethernet; the frequency sweeper decodes the GSM-R and GSM cell information in the received signals in the GSM-R band and adjacent bands, and extracts the key decoding parameters and outputs them to the real-time processing unit via Gigabit Ethernet.

[0091] The key parameters of the cell information include: MCC, MNC, LAC, CI, ARFCN, RxLev, and CA list.

[0092] Step S4: The real-time processing unit performs a rapid assessment of radio noise in the GSM-R band based on the spectrum measurement data, and obtains the radio noise assessment result data.

[0093] Among them, rapid radio noise assessment refers to estimating the noise in the radio environment. The specific process is as follows:

[0094] First, data from the 930MHz and 934MHz frequencies in the GSM-R band are acquired over a period of time based on spectrum measurement data. Then, all measurement data from the two frequencies are sorted from largest to smallest. Next, the location with the smallest slope and a nearby segment of data are selected as the original evaluation data. Finally, the effective value of the original evaluation data is calculated to obtain the radio noise assessment data.

[0095] Step S5: The real-time processing unit processes and reconstructs the spectrum data based on the spectrum measurement data using the empirical mode decomposition algorithm, and performs signal detection in combination with the radio noise assessment results to obtain the signal center frequency, power, and bandwidth data.

[0096] Signal detection refers to identifying signals with received power greater than the radio noise assessment data within the spectrum monitoring range based on radio noise assessment data, and calculating the signal bandwidth to obtain the signal's center frequency, power, and bandwidth data.

[0097] Step S6: Based on the signal center frequency, frequency relationship identification is performed to obtain frequency intermodulation data;

[0098] Among them, "intermodulation relationship identification" refers to determining the frequency relationship between signals based on the signal center frequency. The specific logic is as follows: If Then f3, f1, and f2 constitute an (m+n) order frequency intermodulation relationship.

[0099] Step S7: Based on frequency intermodulation data and signal power and bandwidth data, intermodulation signal identification is performed to obtain suspected intermodulation signal data;

[0100] Intermodulation signal identification refers to identifying a suspected intermodulation signal of f1 and f2 based on frequency intermodulation relationship data. If f3, f1, and f2 form an (m+n) order frequency intermodulation relationship, the signal power and bandwidth of f1 and f2 are equal, and the signal power of f3 is less than that of f1 and f2, and the bandwidth of f3 is (m+n) times the bandwidth of f1, then f3 is a suspected intermodulation signal of f1 and f2.

[0101] Step S8: Based on the suspected intermodulation signal data, IQ data of the intermodulation signal is extracted by combining IQ monitoring data, and intermodulation interference is identified to obtain intermodulation interference identification result data.

[0102] Extracting signal IQ data refers to the process of obtaining the corresponding signal's IQ data from the IQ data acquired by the real-time spectrum analyzer. The IQ data output by the real-time spectrum analyzer includes IQ data from the entire GSM-R band and adjacent bands, i.e., broadband IQ data. "Signal IQ data" specifically refers to the IQ data corresponding to the signal obtained in step 5, signal detection. Extracting IQ data requires operations such as sampling rate conversion and polyphase filtering.

[0103] Intermodulation interference identification refers to the process of locating intermodulation interference based on correlation analysis of signal IQ data. The specific principle is as follows: First, the periodicity of the signal is analyzed. The period of the suspected intermodulation signal f3 should be strongly correlated with that of signals f1 and f2. That is, the suspected intermodulation signal f3 only exists when signals f1 and f2 are both being transmitted; otherwise, there is no suspected intermodulation signal f3. Then, based on the signal periodicity analysis results, data for f1, f2, and f3 during the transmission period of the suspected intermodulation signal are extracted, and the changes in signal power are analyzed to determine whether the changes in signal power conform to the generation mechanism of intermodulation interference. That is, if the power of signals f1 and f2 decreases, the power of the suspected intermodulation signal f3 also decreases; if the power of signals f1 and f2 increases, the power of the intermodulation signal f3 also increases. If both the signal periodicity and the power relationship are strongly correlated, then signal f3 is determined to be intermodulation interference from signals f1 and f2.

[0104] Step S9: The real-time processing unit obtains the location information via Ethernet, combines the intermodulation interference identification results, decodes the key parameter data, and queries the intermodulation interference cell line, name, location and other information through the ledger to obtain the intermodulation interference information data, and outputs the intermodulation interference information data to the system controller via Ethernet.

[0105] The location information comes from the dynamic testing vehicle's spatiotemporal positioning system, which includes the current railway line, class, mileage, and latitude and longitude information of the dynamic testing vehicle.

[0106] For example, “K363+102232.87654123565.88888888” means that the inspection vehicle is currently located at 363.102 km on a certain high-speed railway, with latitude and longitude of 232.87654123 565.88888888.

[0107] The ledger refers to an electronic spreadsheet containing information on GSM-R base stations along railway lines. This includes information such as base station name, location (mileage, latitude and longitude), frequency (BCCH, TCH), cell number, and jurisdiction boundary. The GSM-R intermodulation interference system can obtain relevant information about GSM-R base stations from the ledger to assist in interference location and information display.

[0108] In step S10, the system controller will dynamically detect the vehicle's current position, intermodulation interference position, and other information and display it in real time on the GIS through the system display.

[0109] Real-time display refers to drawing the train's trajectory and marking intermodulation interference information in real time based on the latitude and longitude data received by the dynamically detected train. The displayed information includes the current train position, intermodulation interference position, and interference list (including interfering cell MCC, MNC, LAC, CI, operator, railway bureau, line, and mileage).

[0110] It should be noted that although the operation of the method of the present invention has been described in a specific order in the above embodiments and figures, this does not require or imply that the operations must be performed in that specific order, or that all the operations shown must be performed to achieve the desired result. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step, and / or one step may be broken down into multiple steps.

[0111] Based on the aforementioned inventive concept, such as Figure 5 As shown, the present invention also proposes a computer device 500, including a memory 510, a processor 520, and a computer program 530 stored in the memory 510 and executable on the processor 520. When the processor 520 executes the computer program 530, it implements the aforementioned automatic location method for GSM-R intermodulation interference.

[0112] Based on the aforementioned inventive concept, the present invention proposes a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the aforementioned automatic location method for GSM-R intermodulation interference.

[0113] Based on the aforementioned inventive concept, this invention proposes a computer program product, which includes a computer program that, when executed by a processor, implements an automatic location method for GSM-R intermodulation interference.

[0114] Compared with existing technologies, the GSM-R intermodulation interference automatic location method and device proposed in this invention have at least the following technical advantages:

[0115] 1. Based on the dynamic detection vehicle platform, a dedicated GSM-R antenna, real-time spectrum analyzer, and frequency sweeper are used to collect radio signals, perform spectrum analysis, decode cell information, and acquire IQ data. Based on the above data, the correlation analysis of signal frequency, power, bandwidth, and period is performed, and intermodulation interference is identified, thereby realizing the automatic location of GSM-R intermodulation interference.

[0116] 2. Based on the determination of signal frequency relationship, the analysis of signal bandwidth, power and period relationship was carried out, which significantly improved the accuracy of intermodulation interference identification and reduced the probability of false alarm.

[0117] 3. The introduction of IQ data acquisition and analysis function solves the problem of signal time domain feature analysis capability that traditional intermodulation interference identification methods do not have, providing strong support for accurate intermodulation interference location.

[0118] 4. Using a real-time spectrum analyzer to acquire radio signals can ensure the integrity of the acquired signals and effectively avoid missing intermodulation interference signals in dynamic detection scenarios.

[0119] 5. Based on the characteristics of railway dedicated frequency usage, a rapid radio noise assessment method is proposed, which can realize rapid measurement of radio noise in dynamic detection scenarios of railway wireless communication, and assist in signal detection and intermodulation interference identification.

[0120] 6. The empirical mode decomposition algorithm is used to preprocess the spectrum data, which reduces the impact of non-stationarity caused by the propagation and reception of radio signals in high-speed mobile scenarios and improves the robustness of characteristic parameter extraction such as bandwidth during signal detection.

[0121] 7. Based on IQ data, the time-domain waveform data of the analyzed signal is accurately extracted, and the signal power is estimated based on the data during signal transmission. This enables accurate estimation of signal power, effectively avoids the risk of failure in power correlation analysis, and provides strong technical support for dynamic detection of interference in railway wireless communication.

[0122] The acquisition, storage, use, and processing of data in this application comply with relevant laws and regulations.

[0123] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, apparatus, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0124] This invention is described with reference to flowchart illustrations and / or block diagrams of methods and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0125] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0126] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0127] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for automatic location of GSM-R intermodulation interference, characterized in that, The method includes: Radio signals along the railway line are received by a GSM-R antenna installed on the dynamic inspection vehicle; The radio signal is subjected to spectrum analysis and frequency sweep decoding to obtain spectrum analysis results, IQ data and decoding results; Radio noise assessment and signal detection are performed based on spectrum analysis results. Correlation analysis of signal frequency, bandwidth, and power is conducted, and intermodulation interference signals are identified by combining IQ data to obtain intermodulation interference identification results data. The location information is obtained through Ethernet, combined with the intermodulation interference identification results and decoding results, and the intermodulation interference cell attribute information is queried through the ledger to obtain intermodulation interference information data. The current location of the dynamic detection vehicle and the intermodulation interference information data are displayed in real time.

2. The automatic location method for GSM-R intermodulation interference according to claim 1, characterized in that, Radio signals along the railway line are received via a GSM-R antenna installed on the dynamic inspection vehicle, including: The GSM-R antenna installed on the roof of the dynamic inspection vehicle is used to receive radio signals along the railway line and radio signals in adjacent frequency bands; wherein, the GSM-R antenna operates in the GSM-R frequency band.

3. The automatic location method for GSM-R intermodulation interference according to claim 1, characterized in that, The radio signal is subjected to spectrum analysis and frequency sweep decoding to obtain spectrum analysis results, IQ data, and decoding results, including: The radio signals received by the GSM-R antenna are input to the real-time spectrum analyzer and the frequency sweeper via a feeder. A real-time spectrum analyzer was used to perform spectrum analysis on radio signals in the GSM-R band and adjacent bands to obtain spectrum analysis results and IQ data. The GSM-R and GSM cell information in the received signals of the GSM-R band and adjacent frequency bands are decoded using a frequency sweeper, and the decoding parameters are extracted to obtain the decoding results.

4. The automatic location method for GSM-R intermodulation interference according to claim 1, characterized in that, Radio noise assessment and signal detection are performed based on spectrum analysis results. Correlation analysis is conducted on signal frequency, bandwidth, and power, and intermodulation interference signals are identified by combining IQ data. The resulting intermodulation interference identification data includes: Radio noise assessment of the GSM-R band was conducted based on the spectrum analysis results, and radio noise assessment data was obtained. Based on the spectrum analysis results, the empirical mode decomposition algorithm is used to process and reconstruct the spectrum data, and combined with the radio noise assessment results, signal detection is performed to obtain the signal center frequency, signal power, and bandwidth data. Based on the center frequency of the signal, frequency relationship identification is performed to obtain frequency intermodulation data; Intermodulation signal identification is performed based on the frequency intermodulation data and signal power and bandwidth data to obtain suspected intermodulation signal data. Based on the suspected intermodulation signal data, IQ data of the intermodulation signal is extracted by combining IQ monitoring data, and intermodulation interference is identified to obtain intermodulation interference identification result data.

5. The automatic location method for GSM-R intermodulation interference according to claim 4, characterized in that, Location information is acquired via Ethernet, combined with intermodulation interference identification and decoding results, and intermodulation interference cell attribute information is queried from a ledger to obtain intermodulation interference information data. The current location of the dynamic detection vehicle and the intermodulation interference information data are then displayed in real time, including... Location information is obtained via Ethernet, and intermodulation interference identification results are combined with key parameters and the intermodulation interference cell line, name, and location information are queried through the ledger to obtain intermodulation interference information data. The intermodulation interference information data is then output to the system controller via Ethernet. The system controller displays the current location of the dynamic detection vehicle and intermodulation interference information in real time on the GIS via a monitor.

6. An automatic positioning device for GSM-R intermodulation interference, characterized in that, The device includes: The GSM-R antenna is mounted on the roof of the dynamic inspection vehicle to receive radio signals along the railway line. The signal analysis module is used to perform spectrum analysis and frequency sweep decoding on the radio signal to obtain spectrum analysis results, IQ data and decoding results; The control and operation module is used to perform radio noise assessment and signal detection based on spectrum analysis results, perform correlation analysis on signal frequency, bandwidth and power and identify intermodulation interference signals by combining IQ data, and obtain intermodulation interference identification result data. Location information is obtained via Ethernet, combined with intermodulation interference identification and decoding results, and intermodulation interference cell attribute information is queried through the ledger to obtain intermodulation interference information data; The display module is used to display the current position of the dynamic detection vehicle and intermodulation interference information data in real time.

7. The GSM-R intermodulation interference automatic positioning device according to claim 6, characterized in that, The GSM-R antenna is specifically used to receive radio signals along the railway line and radio signals in adjacent frequency bands; wherein, the GSM-R antenna operates in the GSM-R frequency band.

8. The GSM-R intermodulation interference automatic positioning device according to claim 6, characterized in that, The signal analysis module includes at least: a real-time spectrum analyzer and a frequency sweeper; The radio signals received by the GSM-R antenna are input to a real-time spectrum analyzer and a frequency sweeper via a feeder. A real-time spectrum analyzer was used to perform spectrum analysis on radio signals in the GSM-R band and adjacent bands to obtain spectrum analysis results and IQ data. The GSM-R and GSM cell information in the received signals of the GSM-R band and adjacent frequency bands are decoded using a frequency sweeper, and the decoding parameters are extracted to obtain the decoding results.

9. The GSM-R intermodulation interference automatic positioning device according to claim 6, characterized in that, The control and calculation module is specifically used for: Radio noise assessment of the GSM-R band was conducted based on the spectrum analysis results, and radio noise assessment data was obtained. Based on the spectrum analysis results, the empirical mode decomposition algorithm is used to process and reconstruct the spectrum data, and combined with the radio noise assessment results, signal detection is performed to obtain the signal center frequency, signal power, and bandwidth data. Based on the center frequency of the signal, frequency relationship identification is performed to obtain frequency intermodulation data; Intermodulation signal identification is performed based on the frequency intermodulation data and signal power and bandwidth data to obtain suspected intermodulation signal data. Based on the suspected intermodulation signal data, IQ data of the intermodulation signal is extracted by combining IQ monitoring data, and intermodulation interference is identified to obtain intermodulation interference identification result data.

10. The GSM-R intermodulation interference automatic positioning device according to claim 9, characterized in that, The control and calculation module is also specifically used for: Location information is obtained via Ethernet. Combined with intermodulation interference identification results data, key parameters are decoded and the intermodulation interference cell line, name, and location information are queried through the ledger to obtain intermodulation interference information data. The intermodulation interference information data is then output to the system controller via Ethernet.

11. The GSM-R intermodulation interference automatic location device according to claim 10, characterized in that, The display module is specifically used for: The current location of the dynamic detection vehicle and intermodulation interference information data are displayed in real time on the GIS via a monitor.

12. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the method of any one of claims 1 to 5.

13. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the method of any one of claims 1 to 5.

14. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the method of any one of claims 1 to 5.

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