An electromagnetic environment spectrum monitoring system for a communication terminal area

Abstract

This invention relates to the field of electromagnetic environment spectrum monitoring, specifically to an electromagnetic environment spectrum monitoring system for a communication terminal area. It includes a remote monitoring device, a monitoring receiver, and an omnidirectional antenna. The monitoring receiver is connected to the communication terminal under test, and the omnidirectional antenna is connected to the hardware interface of the monitoring receiver to receive regional environmental electromagnetic wave signals. The remote monitoring device communicates with the monitoring receiver. The input signals are the uplink and downlink carrier signals of the communication terminal, and the regional environmental electromagnetic wave signals. The input signals undergo down-conversion and analog-to-digital conversion in a conditioning circuit before being input to the monitoring receiver. The radio frequency module uniformly traverses and collects the spectrum of the monitoring frequency band signal by setting a scanning bandwidth. The monitoring receiver converts the collected time-domain signals into spectrum data, splices multiple data segments into a complete frame according to a specified format, and uploads the spectrum data to the remote monitoring device for display. This invention is applicable to electromagnetic environment spectrum monitoring.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic environment spectrum monitoring, and more specifically to an electromagnetic environment spectrum monitoring system for a communication terminal area. Background Technology

[0002] With the rapid development of technologies such as wireless communication, 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, communication support, and radio management.

[0003] Currently, spectrum analyzers are commonly used for efficient and simple monitoring of the electromagnetic environment spectrum. However, spectrum analyzers are generally used for direct observation and processing of real-time spectrum data, and their functions are limited. They are not suitable for data processing, caching, and recording of status management information during long-term operation of communication terminals, and are not convenient for automated operation.

[0004] Existing technology, such as the electromagnetic environment monitoring system disclosed in CN220120896U, includes a monitoring antenna, a spectrum analyzer, a host computer, a control unit, and a rotating device. The host computer is connected to both the spectrum analyzer and the control unit. 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 commands issued by the host computer to control the rotation of the rotating device, thereby controlling the rotation of the monitoring antenna and achieving automatic adjustment of the monitoring antenna. This eliminates the need for manual replacement of the monitoring antenna or manual adjustment and arrangement of the monitoring environment due to different monitoring areas. The spectrum analyzer preprocesses the first electromagnetic signal collected by the monitoring antenna from the monitoring area to obtain a second electromagnetic signal. The host computer reads the second electromagnetic signal and outputs the corresponding electromagnetic environment data.

[0005] While the above solution enables automated and intelligent monitoring of the electromagnetic environment in the monitored area, simplifies the monitoring process, and improves monitoring efficiency, it still has the following drawbacks:

[0006] The above scheme cannot identify interference, that is, it cannot identify interference in the detected electromagnetic signals.

[0007] The above scheme cannot select a monitoring mode, meaning it cannot support setting the monitoring center frequency and monitoring bandwidth task parameters within the interference monitoring frequency band. Furthermore, it cannot perform specified monitoring under the task parameters, resulting in limited monitoring effectiveness. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide an electromagnetic environment spectrum monitoring system for communication terminal areas, which realizes multi-functional monitoring of the electromagnetic environment spectrum in communication terminal areas.

[0009] The present invention adopts the following technical solution to achieve the above objectives. The present invention provides an electromagnetic environment spectrum monitoring system for a communication terminal area, comprising a remote monitoring device, a monitoring receiver host and an omnidirectional antenna. The monitoring receiver host is connected to the communication terminal under test, and the omnidirectional antenna is connected to the hardware interface of the monitoring receiver host to receive regional environmental electromagnetic wave signals. The remote monitoring device communicates with the monitoring receiver host.

[0010] The radio frequency module of the monitoring receiver 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 then input to the monitoring receiver after analog-to-digital conversion in the conditioning circuit.

[0011] The regional environmental electromagnetic wave signal has an independent channel. After being conditioned, it is input to the monitoring receiver host. The uplink and downlink carrier signals are input to the monitoring receiver host through independent physical interfaces. During operation, the monitoring receiver host selects one of the uplink and downlink carrier signal inputs to the digital processing board of the monitoring receiver host by controlling two sets of switch matrices. The uplink and downlink carrier signals are monitored by time-division processing.

[0012] The radio frequency module collects the spectrum of the monitored frequency band signal at a constant speed by setting the scanning bandwidth. The FPGA inside the monitoring receiver converts the collected time-domain signal into spectrum data, splices multiple data segments into a complete frame according to the specified format, and then uploads the spectrum data to the remote monitoring device for display via UDP communication.

[0013] Furthermore, the remote monitoring equipment supports two modes: designated monitoring and full-frequency monitoring. 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 TCP protocol. After parsing, the monitoring receiving host configures the radio frequency center frequency according to the parameters.

[0014] In the specified monitoring mode, it is possible to 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 of occurrence and actual parameter status of the interference signal will be listed in the interference signal display area.

[0015] In full-frequency monitoring mode, the device will traverse and query within the 1GHz to 6GHz frequency band at a specified speed, and all interference signals that appear during the monitoring period will be recorded in the interference signal display column according to the discovery time.

[0016] Furthermore, the interference identification module of the remote monitoring equipment receives spectrum data, first detects the signal by comparing the difference between the signal and noise in the spectrum, filters out the signal part in the spectrum for the next step of processing, analyzes the signal characteristics, compares the captured signal characteristics with the characteristics of the preset normal operating signal, and identifies and filters out the interference signals within the frequency band.

[0017] The interference identification module has a learning mechanism. When it is first started, it needs to input a table of normal signal characteristic parameters for calibration. The normal signal characteristic parameters are stored in the remote monitoring device for interference identification to call. During the operation of the monitoring function, it selects to mark the captured signal as a normal signal or an abnormal signal and feeds the marking result back to the interference identification module.

[0018] Furthermore, the RF module performs a traversal scan of the signal spectrum in the specified frequency band by setting the scanning bandwidth. The monitoring host's internal FPGA performs channelization processing on the received signal, dividing the wideband channel into multiple narrowband channels, reducing the sampling rate, enhancing the signal resolution, and finally converting the acquired digital signal into spectrum data through FFT.

[0019] The monitoring module inside the monitoring receiver identifies the actual signal characteristics based on the spectrum data and compares them with the pre-loaded standard signal characteristics to generate carrier spectrum monitoring results. Based on the spectrum monitoring results, it identifies whether the power, bandwidth, and frequency signal characteristics of the working signal inside the carrier are normal and reports any abnormalities to the remote monitoring equipment.

[0020] Furthermore, the monitoring system supports alarm triggering functions. Alarm threshold parameters can be set according to signal characteristics. If alarm thresholds are set 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, the corresponding alarm function will be triggered when the measurement result exceeds the threshold. The remote monitoring device will prompt the alarm by flashing indicator lights or flashing interface icons, and will automatically store the alarm frequency band signal.

[0021] Furthermore, the monitoring system supports three acquisition modes: manual acquisition, periodic acquisition, and triggered acquisition. The remote monitoring device automatically and periodically executes acquisition tasks according to the configured parameters. In periodic acquisition mode, the acquisition task can be interrupted by manually clicking the acquisition switch. In triggered acquisition mode, the monitoring frequency band and trigger threshold can be set. When a signal that meets the trigger threshold is detected within the monitoring frequency band during device operation, a single acquisition automatically begins, and the acquisition task continues until the trigger signal disappears.

[0022] 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 control commands. After receiving the command, the monitoring receiving host uploads the stored file to the remote monitoring device via UDP.

[0023] Furthermore, the monitoring receiver receives monitoring tasks from the remote monitoring device, including setting the specified monitoring frequency band, interference trigger threshold, and frequency band range. The monitoring receiver parses the configuration parameters according to the monitoring task, sets the FPGA acquisition parameters, and sends control commands to the radio frequency module to realize the remote control function.

[0024] The spectrum data collected by the monitoring receiver is stored on the solid-state drive of the monitoring receiver by default. Alternatively, the collected spectrum data can be stored on a remote monitoring device. File names are automatically created based on the collection time and parameters. The data can be stored as a single file or automatically split into multiple files according to the set file size limit. The storage space can be divided into important data storage areas and general data storage areas. When the space in 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. When the space in the important data storage area is exhausted, it will not be automatically cleaned up, and new data will be directly discarded. Users can choose whether to delete the data to free up space.

[0025] The remote monitoring equipment and the monitoring receiver host acquire internal temperature, hard disk space usage, and internal chip lock status information in real time, and send the acquired information to the operation and control center. The monitoring receiver host supports receiving and parsing Beidou / GPS signals, acquiring current latitude, longitude, and time information and reporting it. It also supports time synchronization through the remote monitoring equipment in scenarios with weak Beidou / GPS signals.

[0026] Furthermore, the power management module of the monitoring receiver supports the PoE standard, using a network cable to power the device, while also reserving a power adapter interface. When the device is connected to a power adapter, it automatically switches to power supply. When the device is off, pressing the on or off button sends a power management request from the power management board of the power management module to the digital board. The power management chip inside the digital board turns on the power switch, and after ZYNQ starts up, 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 on, pressing the on or off button sends a power off request from the power management board to the digital board. The power chip inside the digital board transmits the power off request to ZYNQ, and after ZYNQ normally finishes the software function to be shut down, it pulls the status signal low to notify the power management board to power off.

[0027] The beneficial effects of this invention are as follows:

[0028] This invention supports core functions such as real-time spectrum monitoring, data acquisition and analysis, interference identification and alarm triggering, and features high portability, ease of operation, and excellent anti-interference capabilities.

[0029] This invention determines whether there are any anomalies in the received carrier signal during the terminal's transmission and reception phase by receiving, identifying, and comparing it in real time with a normal carrier signal standard. When an anomaly occurs in the carrier signal, abnormal spectrum data is collected and stored locally to support users in identifying and confirming the terminal's operating status and analyzing and locating the cause of the fault.

[0030] This invention utilizes an omnidirectional antenna ranging from 1GHz to 6GHz to receive and identify regional interference signals. It captures and stores interference signals within the 1GHz to 6GHz frequency band surrounding the terminal, measures, alarms, and displays the characteristic parameters of the interference signals, providing support for users to detect the electromagnetic environment around the terminal, identify whether BeiDou signals are affected by interference, and optimize the terminal's operating environment.

[0031] This invention features local storage and remote control with automatic monitoring capabilities. The device has built-in storage space to store data collected during operation and work logs. It supports remote configuration of operating parameters via software, automatic execution according to task instructions, and remote retrieval of results, ensuring accurate and efficient use by operators. Attached Figure Description

[0032] 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;

[0033] Figure 2 This is a schematic diagram of the data processing process of the monitoring system of the present invention;

[0034] Figure 3 This is a functional structure block diagram of the remote monitoring equipment and monitoring receiving host of the monitoring system of the present invention;

[0035] Figure 4 This is a flowchart of the interference identification function of the monitoring system of the present invention;

[0036] Figure 5 This is a flowchart of the carrier spectrum monitoring function of the monitoring system of the present invention;

[0037] Figure 6 This is a flowchart of the data acquisition function of the monitoring system of the present invention;

[0038] Figure 7 This is a flowchart of the remote feedback function of the monitoring system of the present invention;

[0039] Figure 8 This is a flowchart of the remote control function of the monitoring system of the present invention. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0041] This 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 receiver host, and an omnidirectional receiving antenna. The monitoring receiver host is connected to the communication terminal under test, and the omnidirectional receiving antenna is connected to the hardware interface of the monitoring receiver host to receive electromagnetic wave signals from the regional environment. The remote monitoring device communicates with the monitoring receiver host.

[0042] The radio frequency module of the monitoring receiver host has three conditioning circuits. The input signals are the uplink carrier, downlink carrier and regional environmental electromagnetic wave signal of the communication terminal. After the input signal is down-converted, it is converted from analog to digital in the conditioning circuit and then input to the digital acquisition board of the monitoring receiver host.

[0043] One 1-6GHz signal has an independent channel, which is input to the digital processing board of the monitoring receiver after passing through the conditioning circuit; multiple uplink and downlink carrier signals with customizable operating frequency bands are input to the device through independent physical interfaces. During device operation, the digital processing board is selected from the multiple carrier inputs by controlling two sets of switch matrices, so the multiple carrier signals will be monitored using time-division processing.

[0044] The digital processing board of the monitoring receiver is designed primarily using Xilinx's XCZU15EG programmable processor chip and ADI's ADRV9009 RF transceiver chip. The main components of the board include an FPGA (Field-Programmable Gate Array) chip, an RF transceiver module, a power supply module, a clock module, and peripheral interfaces, meeting electromagnetic compatibility requirements.

[0045] The signal processing module of the monitoring receiver supports receiving intermediate frequency (IF) signals from 75MHz to 6000MHz, with a maximum receiving bandwidth of 200MHz. After receiving the signal, it is converted into I / Q signals and then processed by zero IF. The internal ADC samples the I / Q signals, and the collected data is sent to the XCZU15EG for processing via the JESD204B interface. The XCZU15EG's PL (Programmable Logic) terminal has an external 4GB-64bit DDR4 memory for data buffering.

[0046] The PS (Processing System) terminal has an external 2TB NVME for storing the collected data; the 4G / 5G module supports 4G / 5G communication; and the Beidou / GPS module can provide the device with accurate positioning and timing information.

[0047] The power management module of the monitoring receiver supports the PoE standard and uses a network cable to power the device. It also has a reserved power adapter interface. When the device is connected to a power adapter, it automatically switches to power supply. When the device is off, pressing the on or off button sends a power management request from the power management board to the digital board. The power management chip inside the digital board turns on the power switch. After ZYNQ starts up, it transmits a high status signal to the power management module, informing the power module that the device has started. When the device is on, pressing the on or off button sends a power off request from the power management board to the digital board. The power chip inside the digital board transmits the power off request to ZYNQ. After ZYNQ successfully completes the software function to be shut down, it pulls the status signal low, notifying the power management board to power off.

[0048] The communication terminal spectrum monitoring system's software consists of embedded software within the monitoring receiver host and software on the remote monitoring device. It uses a client / server architecture, with the embedded software acting as the server running on a customized ARM operating system based on the Zynq chip. It features SSH (Hyper-Security Streaming Protocol) to ensure data and information security. The remote monitoring device software is a client running on the remote monitoring device under a Windows environment. Control and query commands between the software are transmitted via TCP, while data is transmitted via UDP (User Datagram Protocol). Its functions include... Figure 3 As shown, the embedded software inside the monitoring receiver host can perform status query, GPS parsing, signal acquisition, and FFT (Fast Fourier Transform) transformation on the FPGA, and spectrum stitching, data forwarding, acquisition and storage, interference identification, and automatic monitoring functions on the ARM. The software of the remote monitoring device can perform 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.

[0049] The data process of the entire monitoring system is as follows Figure 2 As shown, the frequency conversion module of the monitoring receiver receives environmental electromagnetic wave signals in the 1-6GHz range, uplink carrier signals and downlink carrier signals from the communication terminal, and converts the received signals into intermediate frequency signals. After receiving the digital signals after AD conversion by the RF chip, the FPGA of the signal processing module packages the spectrum data after FFT spectrum conversion. At the same time, the data from the 4G / 5G module and the location and timestamp information of the GPS module are also put into the data packet and sent to the ARM of the signal processing module for processing. The data and status information are processed and sent to the remote monitoring device, and the control commands sent by the remote monitoring device are received. At the same time, the corresponding control commands are sent to the FPGA.

[0050] The following is a detailed explanation of each function implemented by the monitoring system.

[0051] a) Real-time spectrum display function

[0052] The radio frequency module performs uniform traversal acquisition of the signal spectrum in the monitoring frequency band through a 200MHz scanning bandwidth.

[0053] The FPGA inside the monitoring receiver converts the acquired time-domain signal into spectrum data. The ARM software then stitches multiple data segments into a complete frame according to a specified format and uploads the spectrum data to the remote monitoring device for display via UDP communication.

[0054] The remote monitoring equipment features spectrum display and waterfall chart display capabilities. The software interface of the remote monitoring equipment receives real-time spectrum data and displays the spectrum and corresponding spectrum parameters on the interface, allowing direct observation of the presence of real-time signals within the frequency band.

[0055] b) Interference signal capture and alarm function

[0056] This invention has the function of searching for and capturing interference signals in the full frequency band from 1GHz to 6GHz.

[0057] The software on the remote monitoring device supports two modes: "specified monitoring" and "full-frequency monitoring." It allows setting task parameters such as the monitoring center frequency and monitoring bandwidth within the interference monitoring frequency band. The parameter configuration is sent to the embedded software on the monitoring receiving host via the TCP protocol, and the software parses the parameters and configures the radio frequency center frequency accordingly.

[0058] In the "Designated Monitoring" mode, it is supported to set the monitoring frequency band and interference signal characteristic indicators. When an interference signal that meets the characteristic indicators appears within the monitoring frequency band, the time of occurrence and actual parameter status of the interference signal will be listed in the interference signal display area.

[0059] In the "full-frequency monitoring" mode, the remote monitoring equipment will traverse and query within the 1GHz to 6GHz frequency band at a specified speed, and all interference signals that appear during the monitoring period will be recorded in the interference signal display column according to the discovery time.

[0060] like Figure 4 As shown, the interference identification module inside the remote monitoring device receives spectrum data. First, it detects the signal by comparing the difference between the signal and noise in the spectrum, and then filters out the signal part in the spectrum to enter the next step of processing and analyze the signal characteristics.

[0061] The captured signal characteristics are compared with the characteristics of preset normal operating signals to identify and filter out interference signals within the frequency band. The spectral characteristics of the interference signals are then uploaded and finally displayed on the interface.

[0062] First, the interference identification range is set through the software interface of the remote monitoring device. Then, the ARM of the monitoring receiver host is configured to parse and verify the parameters and send the configuration parameters to the FPGA program to trigger the acquisition at regular intervals. The ARM of the monitoring receiver host is also responsible for updating the inverter parameters at regular intervals, 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 receiver host identifies interference based on the converted spectrum data and reports the interference information to the remote monitoring device.

[0063] To improve the efficiency of interference signal identification, the interference identification module has an internal learning mechanism. Upon initial device startup, a table of normal signal characteristic parameters for calibration needs to be input. These parameters are stored internally for use in interference identification. During monitoring operation, users can manually select whether to label captured signals as "normal signals" or "abnormal signals" on the remote monitoring device. The results are fed back to the interference identification module, which updates its identification algorithm based on the labeling results, further improving identification efficiency.

[0064] The interference identification results will be recorded on the device's internal storage card and can be continuously accessed in subsequent operations. There is no need to worry about losing training data after the device is powered off.

[0065] c) Carrier spectrum monitoring function

[0066] The monitoring system of the present invention has a customizable monitoring function for the working status of multiple uplink and downlink carrier signals.

[0067] like Figure 5 As shown, the RF link uses a 200MHz scanning bandwidth to traverse the spectrum of the signal in the specified frequency band. The FPGA program inside the monitoring device will perform channelization processing on the received signal, dividing the broadband channel into multiple narrowband channels to reduce the sampling rate and enhance the signal resolution. Finally, the acquired digital signal is converted into spectrum data through FFT.

[0068] After identifying the actual signal characteristics, the ARM internal monitoring module compares them with the pre-loaded standard signal characteristics to generate carrier spectrum monitoring results. It can identify whether signal characteristics such as the power, bandwidth, and frequency of the carrier's internal operating signal are normal, and report any abnormalities to the remote interface for recording and notification.

[0069] It supports manually setting the frequency band currently being queried to switch between the uplink and downlink carrier frequency bands of each terminal under test; it also supports setting a frequency band search list and automatically switching the search frequency band at regular intervals.

[0070] Interference signals detected during equipment operation will be categorized by signal channel and displayed independently in the interface list for easy reference.

[0071] d) Trigger alarm function

[0072] Alarm threshold parameters can be set based on signal characteristics, such as setting 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, and 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.

[0073] The remote monitoring device will alert users through flashing indicator lights and flashing icons on the software interface. It can be configured to automatically store alarm frequency signals when an alarm is triggered.

[0074] It supports setting an alarm function when no valid signal is detected within a specified frequency band for an extended period, in order to monitor for faults in the receiving link. Parameters such as the monitoring frequency band, valid signal interval threshold, and valid signal level threshold can be set as comprehensive triggering conditions. When an alarm occurs due to an extended period of no valid signal detected in the specified frequency band, the connection status of the omnidirectional antenna or carrier feeder should be checked.

[0075] e) Data acquisition function

[0076] This invention supports configuring three acquisition modes: "manual acquisition," "periodic acquisition," and "triggered acquisition." It stores real-time baseband IQ or spectrum data for subsequent analysis using other devices.

[0077] The manual data collection mode supports setting the data collection duration. After clicking the switch, data collection will begin and automatically end after the data collection time is up. You can also click the switch again to manually end the data collection.

[0078] The periodic acquisition mode supports setting the acquisition duration, acquisition interval, and number of acquisitions. The software on the remote monitoring device automatically and periodically executes the acquisition task according to the configured parameters. The periodic acquisition mode also supports manually clicking the acquisition switch to interrupt the task.

[0079] Triggered acquisition supports setting monitoring frequency bands and trigger feature thresholds. When a signal that meets the trigger threshold appears in the monitoring frequency band during device operation, a single acquisition will automatically begin, and the acquisition task will continue until the trigger signal disappears.

[0080] Data acquisition 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 parsing 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 updating the inverter parameters at regular intervals, switching channels and setting the RF center frequency, performing FFT conversion on the digital signal of the specified frequency band, and storing and reporting the converted spectrum data to the remote monitoring device.

[0081] f) Local data storage function

[0082] The monitoring receiver provides NVMe M.2 2TB SSD storage, supporting local storage of collected spectrum data, offering advantages such as stability and no data loss even when power is off. Software on the remote monitoring device allows users to query, download, or delete stored files after connecting to the device.

[0083] The collected spectrum data is stored on the solid-state drive of the monitoring receiver by default, but you can also choose to store the collected spectrum data on a remote monitoring device.

[0084] It can also automatically create filenames based on the collection time and collection parameters, and can be set to store as a single file or automatically split and store in multiple files according to the set file size limit.

[0085] It also supports dividing the storage space into "important data storage area" and "general data storage area".

[0086] Once the space in the "General Data Storage Area" is exhausted, it will be automatically cleaned up, deleting old data and storing new data based on the file creation time. Once 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. Users can choose whether to delete the data to free up space.

[0087] It supports remote querying of storage space usage and allows real-time checking of remaining space capacity by reporting status. When storage space usage reaches 90% or higher, it will send continuous alarms to the software on the remote monitoring device.

[0088] g) Remote return function

[0089] like Figure 7 As shown, the monitoring system of the present invention supports remote transmission, and can upload the monitoring data and interference identification record files stored locally on the device to the operation and control center via the network.

[0090] The software on the remote monitoring device supports querying the list of files stored on the monitoring device, selecting the file to be downloaded, and informing the monitoring receiving host through control commands. The monitoring receiving host will then upload the stored file to the remote monitoring device via UDP.

[0091] The monitoring system of this invention has both "manual transmission" and "automatic transmission" functions:

[0092] The manual upload function allows users to select local files via software on a remote monitoring device and download them one by one or in batches. The automatic upload function allows users to configure upload parameters remotely, select local file paths, and continuously upload files automatically when the network is stable. If the connection is lost or the timeout occurs, the file retrieval needs to be reconfigured.

[0093] h) Remote control function

[0094] The monitoring receiver host can receive monitoring tasks from remote monitoring devices, such as setting a specified monitoring frequency band, interference trigger threshold, and frequency band range. The embedded software on the monitoring receiver host parses the configuration parameters according to the task, sets the FPGA acquisition parameters, and sends control commands to the radio frequency module to achieve remote control functionality. The remote control function processing flow is as follows: Figure 8 As shown:

[0095] First, the monitoring center frequency, monitoring band width, and monitoring period are set on the interface of the remote monitoring device. Then, the parameter configuration is sent to the monitoring receiver host. The ARM of the monitoring receiver host parses and verifies the parameters and sends the parameter configuration to switch the RF input channel. The ARM of the monitoring receiver host is also responsible for updating the inverter parameters at regular intervals, 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.

[0096] i) Work status reporting and time tracking functions

[0097] This invention has the ability to self-check the working status of the device, and can acquire the internal temperature of the device, the hard disk space usage, and the lock status of the internal hardware chips in real time. The monitoring results can be uploaded to the operation and control center.

[0098] The device is capable of receiving and parsing BeiDou / GPS signals, obtaining and reporting the device's current latitude, longitude, and time information.

[0099] The device supports time synchronization via network cable using remote monitoring software in scenarios with weak BeiDou / GPS signals.

[0100] j) Software update

[0101] The device's internal logic software and embedded software support remote updates via network.

[0102] The update program will be packaged into a file, which can be remotely transmitted to the device via the network in a stable network environment. After loading, the device will be restarted to complete the update.

[0103] Before updating, the current running version will be automatically backed up. If the software fails to start due to update failure or other reasons after the device restarts, the backup program will be automatically loaded to ensure that the device does not crash due to software updates.

[0104] In summary, the RF module of this invention supports customized design based on the operating frequency of the terminal under test, achieving the effect of multi-input parallel monitoring and solving the problem that traditional spectrum analyzers cannot handle multi-band terminal carriers. The external interface retains only RF input, network port, and other necessary information and debugging interfaces, and can be waterproofed and dustproofed. It supports power supply via the network port, increasing portability and simplifying long-term outdoor deployment. A replaceable universal solid-state drive is provided, supporting automatic operation after connecting to a communication terminal, enabling 24-hour automatic monitoring. During operation, abnormal status detection records, interference signal identification, and health management information are stored locally, preventing data loss due to abnormal power outages and facilitating subsequent retrieval and tracing. The interference identification module and carrier detection module have data learning capabilities, using the device's internal solid-state drive to store historical identification data, improving the efficiency and accuracy of interference identification and carrier anomaly detection.

[0105] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. An electromagnetic environment spectrum monitoring system for a communication terminal area, characterized in that, It includes a remote monitoring device, a monitoring receiver host, and an omnidirectional antenna. The monitoring receiver host is connected to the communication terminal under test, and the omnidirectional antenna is connected to the hardware interface of the monitoring receiver host to receive electromagnetic wave signals from the regional environment. The remote monitoring device communicates with the monitoring receiver host. The radio frequency module of the monitoring receiver 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 then input to the monitoring receiver after analog-to-digital conversion in the conditioning circuit. The regional environmental electromagnetic wave signal has an independent channel. After being conditioned, it is input to the monitoring receiver host. The uplink and downlink carrier signals are input to the monitoring receiver host through independent physical interfaces. During operation, the monitoring receiver host selects one of the uplink and downlink carrier signal inputs to the digital processing board of the monitoring receiver host by controlling two sets of switch matrices. The uplink and downlink carrier signals are monitored by time-division processing. The radio frequency module collects the spectrum of the monitored frequency band signal at a constant speed by setting the scanning bandwidth. The FPGA inside the monitoring receiver converts the collected time-domain signal into spectrum data, splices multiple data segments into a complete frame according to the specified format, and then uploads the spectrum data to the remote monitoring device for display. The remote monitoring equipment supports two modes: designated monitoring and full-frequency monitoring. 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 TCP protocol. After parsing, the monitoring receiving host configures the radio frequency center frequency according to the parameters. In the specified monitoring mode, it is possible to 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 of occurrence and actual parameter status of the interference signal will be listed in the interference signal display area. In full-frequency monitoring mode, the device will traverse and query within the 1GHz to 6GHz frequency band at a specified speed, and all interference signals that appear during the monitoring period will be recorded in the interference signal display column according to the discovery time. The interference identification module of the remote monitoring equipment receives spectrum data. First, it detects the signal by comparing the difference between the signal and noise in the spectrum, and then filters out the signal part in the spectrum to enter the next step of processing. It analyzes the signal characteristics and compares the captured signal characteristics with the characteristics of the preset normal operating signal to identify and filter out the interference signals within the frequency band. The interference identification module has a learning mechanism. When it is first started, it needs to input a table of normal signal characteristic parameters for calibration. The normal signal characteristic parameters are stored in the remote monitoring device for interference identification to call. During the operation of the monitoring function, it selects to mark the captured signal as a normal signal or an abnormal signal and feeds the marking result back to the interference identification module. The radio frequency module scans the spectrum of a specified frequency band signal by setting the scanning bandwidth. The FPGA inside the monitoring host performs channelization processing on the received signal, dividing the broadband channel into multiple narrowband channels, reducing the sampling rate and enhancing the signal resolution. Finally, the acquired digital signal is converted into spectrum data through FFT. The monitoring module inside the monitoring receiver identifies the actual signal characteristics based on the spectrum data and compares them with the pre-loaded standard signal characteristics to generate carrier spectrum monitoring results. Based on the spectrum monitoring results, it identifies whether the power, bandwidth, and frequency signal characteristics of the working signal inside the carrier are normal and reports any abnormalities to the remote monitoring equipment.

2. The electromagnetic environment spectrum monitoring system for the communication terminal area according to claim 1, characterized in that, The monitoring system supports alarm triggering function. Alarm threshold parameters can be set according to signal characteristics. If alarm thresholds are set 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, the corresponding alarm function will be triggered when the measurement result exceeds the threshold. The remote monitoring device will prompt the alarm by flashing indicator lights or flashing interface icons, and automatically store the alarm frequency band signal.

3. The electromagnetic environment spectrum monitoring system for the communication terminal area according to claim 1, characterized in that, The monitoring system supports three acquisition modes: manual acquisition, periodic acquisition, and triggered acquisition. The remote monitoring device automatically and periodically executes acquisition tasks according to the configured parameters. In periodic acquisition mode, the task can be interrupted manually by clicking the acquisition switch. Triggered acquisition allows setting the monitoring frequency band and trigger threshold. When a signal meeting the trigger threshold is detected within the monitoring frequency band during device operation, a single acquisition automatically begins, 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 control commands. After receiving the command, the monitoring receiving host uploads the stored file to the remote monitoring device via UDP.

4. The electromagnetic environment spectrum monitoring system for the communication terminal area according to claim 1, characterized in that, The monitoring receiver receives monitoring tasks from remote monitoring devices, including setting the specified monitoring frequency band, interference trigger threshold, and frequency band range. The monitoring receiver parses the configuration parameters according to the monitoring task, sets the FPGA acquisition parameters, and sends control commands to the radio frequency module to realize remote control functions. The spectrum data collected by the monitoring receiver is stored on the solid-state drive of the monitoring receiver by default. Alternatively, the collected spectrum data can be stored on a remote monitoring device. File names are automatically created based on the collection time and parameters. The data can be stored as a single file or automatically split into multiple files according to the set file size limit. The storage space can be divided into important data storage areas and general data storage areas. When the space in 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. When the space in the important data storage area is exhausted, it will not be automatically cleaned up, and new data will be directly discarded. Users can choose whether to delete the data to free up space. The remote monitoring equipment and the monitoring receiver host acquire internal temperature, hard disk space usage, and internal chip lock status information in real time, and send the acquired information to the operation and control center. The monitoring receiver host supports receiving and parsing Beidou / GPS signals, acquiring current latitude, longitude, and time information and reporting it. It also supports time synchronization through the remote monitoring equipment in scenarios with weak Beidou / GPS signals.

5. The electromagnetic environment spectrum monitoring system for the communication terminal area according to claim 1, characterized in that, The power management module of the monitoring receiver supports the PoE standard and uses a network cable to power the device. It also has a reserved power adapter interface. When the device is connected to a power adapter, it automatically switches to power supply. When the device is off, pressing the on or off button sends a power management request from the power management board to the digital board. The power management chip inside the digital board turns on the power switch. After ZYNQ starts up, it transmits a high status signal to the power management module, informing the power module that the device has started. When the device is on, pressing the on or off button sends a power off request from the power management board to the digital board. The power chip inside the digital board transmits the power off request to ZYNQ. After ZYNQ successfully completes the software function to be shut down, it pulls the status signal low, notifying the power management board to power off.

Images