Electromagnetic environment frequency spectrum monitoring system of communication terminal area

Abstract

The invention relates to the field of electromagnetic environment frequency spectrum monitoring, in particular to an electromagnetic environment frequency spectrum monitoring system of a communication terminal area. The system comprises a remote monitoring device, a monitoring receiving host and an omnidirectional antenna, the monitoring receiving host is connected with a tested communication terminal, the omnidirectional antenna is connected to a hardware interface of the monitoring receiving host to receive regional environment electromagnetic wave signals, and the remote monitoring device communicates with the monitoring receiving host; input signals are uplink and downlink carrier signals of a communication terminal and regional environment electromagnetic wave signals, and the input signals are subjected to down-conversion, subjected to analog-to-digital conversion in a conditioning circuit and then input into a monitoring receiving host; the radio frequency module performs uniform-speed traversal acquisition on a monitoring frequency band signal frequency spectrum by setting a scanning bandwidth, the monitoring receiving host converts an acquired time domain signal into frequency spectrum data, and after multiple sections of data are spliced into a complete frame according to a specified format, the frequency spectrum data are uploaded to remote monitoring equipment to be displayed. The method is suitable for electromagnetic environment spectrum monitoring.

Description

Technical Field

[0001] The present invention relates to the field of electromagnetic environment spectrum monitoring, and in particular to an electromagnetic environment spectrum monitoring system for a communication terminal area. Background Art

[0002] With the rapid development of technologies such as wireless communications, radar, satellite navigation, the Internet of Things, and 5G / 6G, the electromagnetic environment is becoming increasingly complex, and spectrum resources are becoming increasingly scarce. As a national strategic resource, the efficient management and secure monitoring of the electromagnetic spectrum are crucial for military defense, public safety, communications support, and radio management.

[0003] Currently, spectrum analyzers are commonly used to efficiently and simply monitor the electromagnetic environment spectrum. However, spectrum analyzers are generally used to directly observe and process real-time spectrum data, and their functions are limited. They are not suitable for data processing, caching, and recording status management information during long-term operation of communication terminals, and are not convenient for automated operation.

[0004] Prior art, such as CN220120896U, discloses an electromagnetic environment monitoring system comprising a monitoring antenna, a spectrum analyzer, a host computer, a control unit, and a rotating device. The host computer is connected to the spectrum analyzer and the control unit, respectively. The spectrum analyzer is connected to the monitoring antenna, the control unit is connected to the rotating device, and the rotating device is connected to the monitoring antenna. The control unit responds to monitoring instructions issued by the host computer to control the rotation of the rotating device to drive the rotation control operation of the monitoring antenna, thereby achieving automatic adjustment of the monitoring antenna, eliminating the need for manual replacement of the monitoring antenna and manual adjustment and arrangement of the monitoring environment due to different monitored areas. The spectrum analyzer preprocesses the first electromagnetic signal of the monitored area collected by the monitoring antenna to obtain a second electromagnetic signal. The host computer reads the second electromagnetic signal and outputs the corresponding electromagnetic environment data.

[0005] Although the above solution can realize automatic and intelligent monitoring of the electromagnetic environment in the monitored area, simplify the monitoring process and improve monitoring efficiency, it still has the following shortcomings: The above solution cannot perform interference identification, that is, it cannot perform interference identification on the detected electromagnetic signal.

[0006] The above solution cannot select the monitoring mode, that is, it cannot support setting the monitoring center frequency and monitoring bandwidth task parameters within the interference monitoring frequency band. Further, it cannot perform specified monitoring under the task parameters, and the monitoring effect achieved is limited. Summary of the Invention

[0007] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an electromagnetic environment spectrum monitoring system for a communication terminal area, thereby realizing multifunctional monitoring of the electromagnetic environment spectrum of the communication terminal area.

[0008] The present invention adopts the following technical solutions to achieve the above-mentioned purpose. The present invention provides an electromagnetic environment spectrum monitoring system for a communication terminal area, comprising a remote monitoring device, a monitoring receiving host, and an omnidirectional antenna. The monitoring receiving host is connected to the communication terminal under test. The omnidirectional antenna is connected to the hardware interface of the monitoring receiving host to receive electromagnetic wave signals in the regional environment. The remote monitoring device communicates with the monitoring receiving host. The RF module of the monitoring and receiving host includes three conditioning circuits. The input signals are the uplink and downlink carrier signals of the communication terminal and the regional environmental electromagnetic wave signal. The input signals are down-converted and converted into digital signals in the conditioning circuit before being input into the monitoring and receiving host. The regional environmental electromagnetic wave signal has an independent channel and is input into the monitoring and receiving host through the conditioning circuit. The uplink and downlink carrier signals are input into the monitoring and receiving host through independent physical interfaces. During the operation of the monitoring and receiving host, the two sets of switch matrices are controlled to select one of the uplink and downlink carrier signal inputs to input into the digital processing board of the monitoring and receiving host. The uplink and downlink carrier signals are monitored using time-sharing processing. The RF module sets the scanning bandwidth to uniformly traverse and collect the signal spectrum of the monitoring frequency band. The FPGA inside the monitoring receiving host converts the collected time domain signal into spectrum data. After splicing multiple segments of data into a complete frame according to the specified format, the spectrum data is uploaded to the remote monitoring device through UDP communication for display.

[0009] Furthermore, the remote monitoring device supports both specified monitoring and full-frequency monitoring modes. It supports setting the monitoring center frequency and monitoring bandwidth task parameters within the interference monitoring frequency band. The parameter configuration is sent to the monitoring receiving host via the TCP protocol. The monitoring receiving host parses and configures the RF center frequency according to the parameters. In the specified monitoring mode, the monitoring frequency band and interference signal characteristic indicators can be set. When an interference signal that meets the characteristic indicators appears in the monitoring frequency band, the time when the interference signal appears and the actual parameter status will be listed in the interference signal display area; In full-frequency monitoring mode, the device will traverse the 1GHz to 6GHz frequency band at a specified speed. All interference signals that appear during the monitoring period are recorded in the interference signal display column according to the time of discovery.

[0010] Furthermore, the interference identification module of the remote monitoring device receives spectrum data and first detects the signal by comparing the difference between the signal and noise in the spectrum, filters out the signal part of the spectrum for the next step of processing, analyzes the signal characteristics, compares the captured signal characteristics with the characteristics of the preset normal working signal, and identifies and filters out the interference signal within the frequency band; The interference identification module has an internal learning mechanism. When it is first started, it is necessary to input a normal signal characteristic parameter table for calibration. The normal signal characteristic parameters are stored inside the remote monitoring device for interference identification to call. During the operation of the monitoring function, the captured signal is selected to be marked as a normal signal or an abnormal signal, and the marking result is fed back to the interference identification module.

[0011] Furthermore, the RF module traverses and scans the signal spectrum of the specified frequency band by setting the scanning bandwidth. The FPGA inside the monitoring receiving host will channelize the received signal, split the broadband channel into multiple narrowband channels, reduce the sampling rate, enhance the signal resolution, and finally convert the collected digital signal into spectrum data through FFT. The monitoring module inside the monitoring receiving host identifies the actual signal characteristics based on the spectrum data and compares them with the pre-loaded standard signal characteristics to generate the carrier spectrum monitoring results. Based on the spectrum monitoring results, it identifies whether the working signal power, bandwidth and frequency signal characteristics inside the carrier are normal, and reports any abnormal conditions to the remote monitoring device.

[0012] Furthermore, the monitoring system supports triggering an alarm function and setting alarm threshold parameters according to signal characteristics. For example, if the alarm threshold is set as to whether a signal should appear in a certain frequency band, whether the real-time signal is lower or higher than the normal signal power threshold, or whether the real-time signal is lower or higher than the normal signal bandwidth threshold, when the measurement result exceeds the threshold, the corresponding alarm function is triggered, and the remote monitoring device prompts an alarm by flashing the indicator light or the interface icon, and automatically stores the alarm frequency band signal.

[0013] Furthermore, the monitoring system supports the configuration of three acquisition modes: manual acquisition, periodic acquisition, and triggered acquisition. The remote monitoring device automatically and periodically performs the acquisition task according to the configured parameters. The periodic acquisition mode supports manually clicking the acquisition switch to interrupt the task. The triggered acquisition supports setting the monitoring frequency band and trigger feature threshold. When a signal that meets the trigger threshold appears in the monitoring frequency band during device operation, a single acquisition is automatically started, and the acquisition task continues until the trigger signal disappears. The remote monitoring device supports querying the file list stored in the monitoring receiving host, selecting the file to be downloaded, and informing the monitoring receiving host through a control instruction. After receiving the instruction, the monitoring receiving host uploads the stored file to the remote monitoring device through UDP.

[0014] Furthermore, the monitoring receiving host receives the monitoring task issued by the remote monitoring device, including setting the monitoring specified frequency band, interference trigger threshold and setting the frequency band range. The monitoring receiving host parses the configuration parameters according to the monitoring task, sets the FPGA acquisition parameters and issues the RF module control instructions to realize the remote control function; The spectrum data collected by the monitoring receiving host is stored in the solid-state hard disk of the monitoring receiving host by default, or you can choose to store the collected spectrum data on the remote monitoring device. The file name is automatically created according to the collection time and collection parameters. It can be set to be stored as a single file or automatically split and stored in multiple files according to the set file size limit. It supports the division of important data storage areas and general data storage areas within the storage space. When the internal space of the general data storage area is exhausted, it will be automatically cleaned up, and old data will be automatically deleted according to the file creation time to store new data. When the space in the important data storage area is used up, it will not be automatically cleaned up, and new data will be directly discarded. The user can actively choose whether to delete it to free up space. The remote monitoring device and the monitoring receiving host obtain real-time information on internal temperature, hard disk space usage, and hardware internal chip lock status, and send the obtained information to the operation control center. The monitoring receiving host supports receiving and parsing Beidou / GPS signals, and obtains and reports the current latitude and longitude and time information. It supports time synchronization through remote monitoring equipment in scenarios where the Beidou / GPS signal is weak.

[0015] Furthermore, the power management module of the monitoring receiving host supports the PoE standard, uses a network cable to power the device, and reserves a power adapter power supply interface. When the device is connected to the power adapter, it automatically switches to power supply. When the device is turned off, press the on or off button, and the power management board of the power management module sends a power-on request to the digital board. The power management chip inside the digital board turns on the power switch. After ZYNQ starts, it transmits a high status signal to the power management module to inform the power module that the device has started; when the device is turned on, press the on or off button, and the power management board sends a shutdown request to the digital board. The power chip inside the digital board transmits the shutdown request to ZYNQ, waits for ZYNQ to normally complete the software function to be closed, and then pulls down the status signal to notify the power management board to cut off the power.

[0016] The beneficial effects of the present invention are: The present invention supports core functions such as real-time spectrum monitoring, data acquisition and analysis, interference identification and triggering alarms, and has product characteristics such as strong portability, easy operation, and excellent anti-interference ability.

[0017] This invention receives, identifies, and compares the normal carrier signal to real-time standards to determine whether the received carrier signal is abnormal during the terminal's transmission and reception phase. When an abnormality occurs in the carrier signal, the abnormal spectrum data is collected and locally stored, providing support for users to identify and confirm the terminal's operating status and analyze and locate the cause of the fault.

[0018] This invention uses a 1GHz to 6GHz omnidirectional antenna to receive and identify regional interference signals. It captures and stores interference signals in the 1GHz to 6GHz frequency band surrounding the terminal, measures, issues alarms, and displays characteristic parameters of the interference signals. This supports users in detecting the electromagnetic environment around the terminal, identifying whether Beidou signals are affected by interference, and optimizing the terminal's operating environment.

[0019] This device features local storage and remote control for automated on-call monitoring. The device has built-in storage for collected data and work logs during operation. It supports remote software configuration of operating parameters, automatic operation according to task instructions, and remote access to operating results, ensuring accurate and efficient use by operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural block diagram of an electromagnetic environment spectrum monitoring system for a communication terminal area provided by the present invention; Figure 2 It is a schematic diagram of the data processing process of the monitoring system of the present invention; Figure 3 It is a functional structure diagram of the remote monitoring device and the monitoring receiving host of the monitoring system of the present invention; Figure 4 is a flow chart of the interference identification function of the monitoring system of the present invention; Figure 5 This is a flow chart of the carrier spectrum monitoring function of the monitoring system of the present invention; Figure 6 It is a flow chart of the data acquisition function of the monitoring system of the present invention; Figure 7 This is a flow chart of the remote return function of the monitoring system of the present invention; Figure 8 It is a flow chart of the remote control function of the monitoring system of the present invention. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0022] The present invention provides an electromagnetic environment spectrum monitoring system for a communication terminal area, such as Figure 1 As shown, it includes a remote monitoring device, a monitoring receiving host and an omnidirectional receiving antenna. The monitoring receiving host is connected to the communication terminal under test. The omnidirectional receiving antenna is connected to the hardware interface of the monitoring receiving host to receive regional environmental electromagnetic wave signals. The remote monitoring device communicates with the monitoring receiving host.

[0023] The RF module of the monitoring and receiving host is equipped with three conditioning circuits. The input signals are the uplink carrier, downlink carrier and regional environmental electromagnetic wave signal of the communication terminal. The input signals are down-converted and the analog-to-digital conversion is completed in the conditioning circuit before being input into the digital acquisition board of the monitoring and receiving host.

[0024] A signal in the 1-6 GHz range has an independent channel and is fed through conditioning circuits into the digital processing board of the monitoring and receiving host. Multiple uplink and downlink carrier signals in customizable operating frequency bands are fed into the device through independent physical interfaces. During operation, the device controls two switch matrices to select one of the multiple carrier inputs for input to the digital processing board. This allows for time-sharing monitoring of these multiple carrier signals.

[0025] The digital processing board for the monitoring and receiving host primarily utilizes the Xilinx XCZU15EG programmable processor chip and the Analog Devices ADRV9009 RF transceiver. The board's main components include an FPGA (Field-Programmable Gate Array) chip, RF transceiver module, power module, clock module, and peripheral interfaces, meeting electromagnetic compatibility requirements.

[0026] The signal processing module of the monitoring receiver supports receiving IF signals from 75MHz to 6000MHz, with a maximum receive bandwidth of 200MHz. The received signal is converted into I / Q signals and then processed through zero-IF. The internal ADC samples the I / Q signals, and the collected data is sent to the XCZU15EG via the JESD204B interface for processing. The XCZU15EG's PL (Programmable Logic) includes 4GB of 64-bit DDR4 memory for data caching.

[0027] The PS (Processing System) side has an external 2TB NVME for storing collected data; the 4G / 5G module supports 4G / 5G communication functions; the Beidou / GPS module can provide accurate positioning and timing information for the device.

[0028] The power management module of the monitoring receiving host supports the PoE standard, uses the network cable to power the device, and reserves a power adapter power supply interface. When the device is connected to the power adapter, it automatically switches to power supply. When the device is turned off, press the on or off button. The power management board of the power management module sends a power-on request to the digital board. The power management chip inside the digital board turns on the power switch. After ZYNQ starts, it transmits a high status signal to the power management module to inform the power module that the device has started; when the device is turned on, press the on or off button. The power management board sends a shutdown request to the digital board. The power chip inside the digital board transmits the shutdown request to ZYNQ, waits for ZYNQ to normally complete the software function to be closed, and then pulls down the status signal to notify the power management board to cut off the power.

[0029] The software of the communication terminal spectrum monitoring system consists of embedded software inside the monitoring receiving host and remote monitoring device software. It uses a client / server software architecture. The embedded software runs as a server on the ARM operating system customized for the Zynq chip. It has a transport layer encryption protocol SSH to ensure data and information security. The remote monitoring device software is a client running in the Windows environment on the remote monitoring device. Control and query commands between software are transmitted via TCP, and data is transmitted via UDP (User Datagram Protocol). Its functions include: Figure 3 As shown in the figure, the embedded software inside the monitoring and receiving host can realize status query, GPS analysis, signal acquisition and FFT (Fast Fourier Transform) transformation on FPGA, and can realize spectrum splicing, data forwarding, acquisition storage, interference identification and automatic monitoring functions on ARM. The remote monitoring equipment software can realize interference information acquisition, interference information display, interference alarm function, historical information download, monitoring parameter control, control query, acquisition parameter control, remote file list acquisition, acquisition file download, real-time spectrum data reception and spectrum display.

[0030] The data process of the entire monitoring system is as follows Figure 2 As shown, the frequency conversion module of the monitoring receiving host receives the environmental electromagnetic wave signal in the 1-6GHz area, the uplink carrier signal of the communication terminal, and the downlink carrier signal of the communication terminal, and converts the received signal into an intermediate frequency signal. After receiving the digital signal after the AD conversion of the RF chip, the FPGA of the signal processing module packages the spectrum data after FFT spectrum conversion, and puts the data of the 4G / 5G module and the location and timestamp information of the GPS module into the data packet, and sends it to the ARM of the signal processing module for processing. The data and status information are sent to the remote monitoring device, and the control instructions sent by the remote monitoring device are received, and the corresponding control instructions are sent to the FPGA.

[0031] The following is a detailed description of the various functions implemented by the monitoring system.

[0032] a) Real-time spectrum display function The RF module uses a 200MHz scanning bandwidth to uniformly traverse and collect the signal spectrum of the monitoring frequency band.

[0033] The FPGA inside the monitoring receiving host converts the collected time domain signal into spectrum data. The ARM software splices multiple segments of data into a complete frame according to the specified format, and then uploads the spectrum data to the remote monitoring device through UDP communication for display.

[0034] Remote monitoring devices feature spectrum and waterfall chart displays. The software on the remote monitoring device interface receives real-time spectrum data and displays the spectrum and corresponding spectrum parameters on the interface, allowing users to directly observe whether a live signal exists within the frequency band.

[0035] b) Interference signal capture and alarm function The present invention has the function of searching and capturing interference signals in the entire frequency band of 1GHz to 6GHz.

[0036] The software on the remote monitoring device supports both "specified monitoring" and "full-frequency monitoring" modes, allowing you to set task parameters such as the monitoring center frequency and monitoring bandwidth within the interference monitoring band. The parameter configuration is transmitted via TCP to the embedded software on the monitoring receiver host. The software then interprets the parameters and configures the RF center frequency accordingly.

[0037] In the "Specified Monitoring" mode, you can set the monitoring frequency band and interference signal characteristic indicators. When an interference signal that meets the characteristic indicators appears in the monitoring frequency band, the time when the interference signal appears and the actual parameter status will be listed in the interference signal display area; In the "full-frequency monitoring" mode, the remote monitoring device will traverse and query within the 1GHz to 6GHz frequency band at a specified speed. All interference signals that appear during the monitoring period are recorded in the interference signal display column according to the time of discovery.

[0038] like Figure 4 As shown, the interference identification module inside the remote monitoring device receives spectrum data, first detects the signal by comparing the difference between the signal and noise in the spectrum, and filters out the signal part in the spectrum for the next step of processing to analyze the signal characteristics.

[0039] Compare the captured signal characteristics with the characteristics of the preset normal working signal, identify and filter out the interference signal within the frequency band, upload the interference signal spectrum characteristics, and finally display them on the interface.

[0040] First, the interference identification range is set through the software interface of the remote monitoring device. Then, the parameter configuration monitoring and receiving host's ARM is used to perform parameter analysis and configuration verification. The configuration parameters are sent to the FPGA program to trigger acquisition at regular intervals. The monitoring and receiving host's ARM is also responsible for regularly updating the inverter parameters, setting the RF center frequency, and performing data processing, namely FFT conversion. The converted spectrum data is sent to the remote monitoring device for display. At the same time, the monitoring and receiving host performs interference identification based on the converted spectrum data and reports the interference information to the remote monitoring device.

[0041] To improve interference signal identification efficiency, the interference identification module incorporates a learning mechanism. Upon initial device startup, a table of normal signal characteristic parameters must be entered for calibration. These parameters are stored internally and then used by interference identification. During monitoring, users can manually select "normal" or "abnormal" signals on the remote monitoring device. The results are fed back to the interference identification module, which then updates its recognition algorithm based on these markings, further improving identification efficiency.

[0042] The interference identification results will be recorded on the memory card inside the device and can be continuously called up in subsequent runs, without worrying about losing training data after the device is powered off.

[0043] c) Carrier spectrum monitoring function The monitoring system of the present invention has a customizable function of monitoring the working status of multiple uplink and downlink carrier signals.

[0044] like Figure 5 As shown in the figure, the RF link uses a 200MHz scanning bandwidth to traverse the signal spectrum of the specified frequency band. The FPGA program inside the monitoring device will channelize the received signal, split the broadband channel into multiple narrowband channels to reduce the sampling rate and enhance the signal resolution. Finally, the collected digital signal is converted into spectrum data through FFT.

[0045] The ARM internal monitoring module identifies actual signal characteristics and compares them with pre-loaded standard signal characteristics to generate carrier spectrum monitoring results. It can determine whether the carrier's internal operating signal power, bandwidth, frequency, and other signal characteristics are normal, and report any abnormalities to the remote interface for logging and prompting.

[0046] Supports manual setting of the currently queried frequency band to switch between the uplink and downlink carrier frequency bands of the terminal under test; supports setting the frequency band search list and automatically switching the search band at a scheduled time.

[0047] Interference signals detected during device operation will be divided according to signal channels and displayed independently in the interface list for easy query.

[0048] d) Triggering alarm function Set alarm threshold parameters based on signal characteristics, such as whether a signal should appear in a certain frequency band, whether the real-time signal is lower or higher than the normal signal power threshold, or whether the real-time signal is lower or higher than the normal signal bandwidth threshold. When the measurement result exceeds the threshold, the corresponding alarm will be triggered.

[0049] The remote monitoring device will prompt an alarm by flashing indicator lights, flashing software interface icons, etc. When an alarm is triggered, the alarm frequency band signal can be automatically stored.

[0050] You can set an alarm for extended periods of no valid signal detection within a specified frequency band to monitor for receive link failures. You can set parameters such as the monitoring frequency band, valid signal interval threshold, and valid signal level threshold as comprehensive trigger conditions. If the alarm is triggered when no valid signal is detected for an extended period within a specified frequency band, check the connection of the omnidirectional antenna or carrier feeder.

[0051] e) Data collection function The present invention supports configuration of three acquisition modes: "manual acquisition", "periodic acquisition" and "trigger acquisition". It stores real-time baseband IQ or spectrum data for subsequent analysis and use by other devices.

[0052] Manual collection mode supports setting the collection time. Click the switch to start the collection, and it will automatically end after the collection time is up. You can also click the switch again to actively end the collection. The periodic collection mode supports setting the collection duration, collection interval and number of collections. The software on the remote monitoring device automatically and periodically executes the collection task according to the configured parameters. The periodic collection mode also supports manually clicking the collection switch to interrupt the task. Triggered acquisition supports setting the monitoring frequency band and trigger feature threshold. When a signal meeting the trigger threshold appears in the monitoring frequency band during device operation, a single acquisition starts automatically and the acquisition task continues until the trigger signal disappears.

[0053] Data collection functions such as Figure 6 As shown, the acquisition parameters are set on the interface of the remote monitoring device, and then the parameter configuration is sent to the monitoring receiving host. The ARM of the monitoring receiving host performs parameter analysis and configuration verification, and sends the configuration parameters to the FPGA program to trigger acquisition at regular intervals. The ARM of the monitoring receiving host is also responsible for regularly updating the inverter parameters, switching channels and setting the RF center frequency, performing FFT conversion on the digital signal in the specified frequency band, and storing the converted spectrum data and reporting it to the remote monitoring device.

[0054] f) Local data storage function The monitoring receiver provides NVMe M.2 2TB SSD storage, allowing local storage of collected spectrum data. This ensures stable data storage and prevents power outages. Software on the remote monitoring device can connect to the device to query, download, or delete stored files.

[0055] The collected spectrum data is stored in the solid-state drive of the monitoring receiving host by default. You can also choose to store the collected spectrum data on the remote monitoring device.

[0056] At the same time, the file name can be automatically created according to the acquisition time and acquisition parameters. It can be set to be stored as a single file or automatically split and stored in multiple files according to the set file size limit.

[0057] It also supports dividing the storage space into "important data storage area" and "general data storage area".

[0058] When the internal space of the "general data storage area" is exhausted, it will be automatically cleaned up, and old data will be automatically deleted and new data will be stored according to the file creation time; the space in the "important data storage area" will not be automatically cleaned up after it is used up, and new data will be directly discarded. The user can actively choose whether to delete it to free up space.

[0059] Supports remote query of storage space usage, and can query the remaining space capacity in real time by reporting the status. When the storage space utilization rate reaches 90% or above, a continuous alarm will be sent to the software on the remote monitoring device.

[0060] g) Remote return function like Figure 7 As shown, the monitoring system of the present invention supports remote backhaul, and can upload the monitoring data and interference identification record files stored locally in the device to the operation control center via the network.

[0061] The software on the remote monitoring device supports querying the file list stored in the monitoring device, selecting the file to be downloaded, and informing the monitoring receiving host through control instructions. The monitoring receiving host will upload the stored file to the remote monitoring device through UDP.

[0062] The monitoring system of the present invention has the functions of "manual return" and "automatic return": The manual upload function supports selecting local files through the software on the remote monitoring device and downloading them one by one or in batches. The automatic upload function supports remote configuration of upload parameters and selection of local file paths. It automatically uploads files continuously when the network is stable. After the connection is disconnected or timed out, it is necessary to reconfigure the file acquisition.

[0063] h) Remote control function The monitoring receiving host can receive monitoring tasks sent by remote monitoring equipment, such as setting monitoring of designated frequency bands, interference triggering thresholds, setting frequency band ranges, etc. The embedded software on the monitoring receiving host analyzes configuration parameters according to task monitoring, sets FPGA acquisition parameters and sends RF module control instructions to realize remote control function. The remote control function processing flow is as follows: Figure 8 As shown: First, set the monitoring center frequency, monitoring frequency band width, and monitoring period on the interface of the remote monitoring device, and then send the parameter configuration to the monitoring receiving host. The ARM of the monitoring receiving host performs parameter analysis and configuration verification, and sends the parameter configuration to the switching RF input channel. The ARM of the monitoring receiving host is also responsible for regularly updating the inverter parameters, switching channels and setting the RF center frequency, performing FFT conversion on the digital signal of the specified frequency band, storing the converted spectrum data, and uploading the spectrum data and real-time parameters to the remote monitoring device.

[0064] i) Work status reporting and time synchronization function The present invention has the ability to perform self-inspection on the working status of the equipment, obtain the internal temperature of the equipment, hard disk space usage and hardware internal chip locking status in real time, and its monitoring results can be uploaded to the operation control center.

[0065] The device has the ability to receive and analyze Beidou / GPS signals, obtain the device's current latitude, longitude and time information and report it.

[0066] The device supports timing via a network cable using remote monitoring software when the Beidou / GPS signal is weak.

[0067] j) Software Updates The device's internal logic software and embedded software support remote updates via the network.

[0068] The update program will be packaged into a file and can be remotely transferred to the device via the network in a stable network environment. After loading, restart the device to complete the update.

[0069] The current running version will be automatically backed up before the update. After the device restarts, if the software cannot be started due to update failure or other reasons, the backup program will be automatically loaded to ensure that the device will not crash due to software updates.

[0070] In summary, the radio frequency module of the present invention supports customized design according to the operating frequency of the terminal to be tested, realizes the effect of multi-channel input parallel monitoring function, and solves the problem that traditional spectrum analyzers cannot handle multi-band terminal carriers; the external interface only retains the radio frequency input, network port and other necessary information and debugging interface, can be waterproof and dustproof reinforced, supports power supply through the network port, increases transportation portability and simplicity of long-term outdoor deployment; provides a replaceable universal solid-state hard drive, supports automatic operation after connecting to the communication terminal, and can achieve 24-hour automatic duty. During operation, abnormal status detection records, interference signal identification status and health management information can be stored locally, and data will not be lost due to abnormal power outages, which is convenient for subsequent retrieval and tracing; 4. The interference identification module and carrier detection module have data learning functions, and use the internal solid-state hard drive of the device to store historical identification data, thereby improving the efficiency and accuracy of interference identification and carrier anomaly detection.

[0071] The foregoing description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Rather, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the concept described herein through the above teachings or techniques or knowledge in the relevant field. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention are intended to be protected by the appended claims.

Claims

1. A system for monitoring the electromagnetic environment spectrum of a communication terminal area, characterized in that: It includes a remote monitoring device, a monitoring receiving host and an omnidirectional antenna. The monitoring receiving host is connected to the communication terminal under test. The omnidirectional antenna is connected to the hardware interface of the monitoring receiving host to receive regional environmental electromagnetic wave signals. The remote monitoring device communicates with the monitoring receiving host. The RF module of the monitoring and receiving host includes three conditioning circuits. The input signals are the uplink and downlink carrier signals of the communication terminal and the regional environmental electromagnetic wave signal. The input signals are down-converted and converted into digital signals in the conditioning circuit before being input into the monitoring and receiving host. The regional environmental electromagnetic wave signal has an independent channel and is input into the monitoring and receiving host through the conditioning circuit. The uplink and downlink carrier signals are input into the monitoring and receiving host through independent physical interfaces. During the operation of the monitoring and receiving host, the two sets of switch matrices are controlled to select one of the uplink and downlink carrier signal inputs to input into the digital processing board of the monitoring and receiving host. The uplink and downlink carrier signals are monitored using time-sharing processing. The RF module sets the scanning bandwidth to uniformly traverse and collect the signal spectrum of the monitoring frequency band. The FPGA inside the monitoring receiving host converts the collected time domain signal into spectrum data. After splicing multiple segments of data into a complete frame according to the specified format, the spectrum data is uploaded to the remote monitoring device for display.

2. The electromagnetic environment spectrum monitoring system for a communication terminal area according to claim 1, characterized in that: The remote monitoring device supports both specified monitoring and full-frequency monitoring modes. It supports setting the monitoring center frequency and monitoring bandwidth task parameters within the interference monitoring frequency band. The parameter configuration is sent to the monitoring receiving host via the TCP protocol. The monitoring receiving host parses and configures the RF center frequency according to the parameters. In the specified monitoring mode, the monitoring frequency band and interference signal characteristic indicators can be set. When an interference signal that meets the characteristic indicators appears in the monitoring frequency band, the time when the interference signal appears and the actual parameter status will be listed in the interference signal display area; In full-frequency monitoring mode, the device will traverse the 1GHz to 6GHz frequency band at a specified speed. All interference signals that appear during the monitoring period are recorded in the interference signal display column according to the time of discovery.

3. The electromagnetic environment spectrum monitoring system for a communication terminal area according to claim 1, characterized in that: The interference identification module of the remote monitoring device receives spectrum data and first detects the signal by comparing the difference between the signal and noise in the spectrum. It then filters out the signal portion of the spectrum for further processing. It analyzes the signal characteristics and compares them with the characteristics of the preset normal working signal to identify and filter out the interference signal within the frequency band. The interference identification module has an internal learning mechanism. When it is first started, it is necessary to input a normal signal characteristic parameter table for calibration. The normal signal characteristic parameters are stored inside the remote monitoring device for interference identification to call. During the operation of the monitoring function, the captured signal is selected to be marked as a normal signal or an abnormal signal, and the marking result is fed back to the interference identification module.

4. The electromagnetic environment spectrum monitoring system for a communication terminal area according to claim 1, characterized in that: The RF module traverses and scans the signal spectrum of the specified frequency band by setting the scanning bandwidth. The FPGA inside the monitoring receiving host will channelize the received signal, split the broadband channel into multiple narrowband channels, reduce the sampling rate, and enhance the signal resolution. Finally, the collected digital signal is converted into spectrum data through FFT. The monitoring module inside the monitoring receiving host identifies the actual signal characteristics based on the spectrum data and compares them with the pre-loaded standard signal characteristics to generate the carrier spectrum monitoring results. Based on the spectrum monitoring results, it identifies whether the working signal power, bandwidth and frequency signal characteristics inside the carrier are normal, and reports any abnormal conditions to the remote monitoring device.

5. The electromagnetic environment spectrum monitoring system for a communication terminal area according to claim 1, characterized in that: The monitoring system supports triggering alarm function and sets alarm threshold parameters according to signal characteristics. For example, if you set the alarm thresholds for whether a signal should appear in a certain frequency band, whether the real-time signal is lower or higher than the normal signal power threshold, or whether the real-time signal is lower or higher than the normal signal bandwidth threshold, when the measurement result exceeds the threshold, the corresponding alarm function is triggered. The remote monitoring device prompts the alarm by flashing the indicator light or the interface icon, and automatically stores the alarm frequency band signal.

6. The electromagnetic environment spectrum monitoring system for a communication terminal area according to claim 1, characterized in that: The monitoring system supports the configuration of three acquisition modes: manual acquisition, periodic acquisition, and triggered acquisition. The remote monitoring device automatically and periodically executes the acquisition task according to the configured parameters. The periodic acquisition mode supports manually clicking the acquisition switch to interrupt the task. The triggered acquisition supports setting the monitoring frequency band and trigger feature threshold. When a signal that meets the trigger threshold appears in the monitoring frequency band during device operation, a single acquisition is automatically started, and the acquisition task continues until the trigger signal disappears. The remote monitoring device supports querying the file list stored in the monitoring receiving host, selecting the file to be downloaded, and informing the monitoring receiving host through a control instruction. After receiving the instruction, the monitoring receiving host uploads the stored file to the remote monitoring device through UDP.

7. The electromagnetic environment spectrum monitoring system for a communication terminal area according to claim 1, characterized in that: The monitoring receiving host receives the monitoring tasks issued by the remote monitoring equipment, including setting the monitoring specified frequency band, interference trigger threshold and setting the frequency band range. The monitoring receiving host parses the configuration parameters according to the monitoring task, sets the FPGA acquisition parameters and issues the RF module control instructions to realize the remote control function; The spectrum data collected by the monitoring receiving host is stored in the solid-state hard disk of the monitoring receiving host by default, or you can choose to store the collected spectrum data on the remote monitoring device. The file name is automatically created according to the collection time and collection parameters. It can be set to be stored as a single file or automatically split and stored in multiple files according to the set file size limit. It supports the division of important data storage areas and general data storage areas within the storage space. When the internal space of the general data storage area is exhausted, it will be automatically cleaned up, and old data will be automatically deleted according to the file creation time to store new data. When the space in the important data storage area is used up, it will not be automatically cleaned up, and new data will be directly discarded. The user can actively choose whether to delete it to free up space. The remote monitoring device and the monitoring receiving host obtain real-time information on internal temperature, hard disk space usage, and hardware internal chip lock status, and send the obtained information to the operation control center. The monitoring receiving host supports receiving and parsing Beidou / GPS signals, and obtains and reports the current latitude and longitude and time information. It supports time synchronization through remote monitoring equipment in scenarios where the Beidou / GPS signal is weak.

8. The electromagnetic environment spectrum monitoring system for a communication terminal area according to claim 1, characterized in that: The power management module of the monitoring receiving host supports the PoE standard, uses the network cable to power the device, and reserves a power adapter power supply interface. When the device is connected to the power adapter, it automatically switches to power supply. When the device is turned off, press the on or off button. The power management board of the power management module sends a power-on request to the digital board. The power management chip inside the digital board turns on the power switch. After ZYNQ starts, it transmits a high status signal to the power management module to inform the power module that the device has started; when the device is turned on, press the on or off button. The power management board sends a shutdown request to the digital board. The power chip inside the digital board transmits the shutdown request to ZYNQ, waits for ZYNQ to normally complete the software function to be closed, and then pulls down the status signal to notify the power management board to cut off the power.

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