CN-121985371-A - Iridium monitoring and early warning system and method

CN121985371ACN 121985371 ACN121985371 ACN 121985371ACN-121985371-A

Abstract

The embodiment of the invention provides an iridium monitoring and early warning system and method, and belongs to the wireless communication signal monitoring technology. The system comprises a signal acquisition subsystem, a signal processing subsystem, an information analysis subsystem and a monitoring and early warning subsystem, wherein the signal acquisition subsystem is used for acquiring wireless signals in an iridium communication frequency band, the signal processing subsystem is connected with the signal acquisition subsystem and used for performing iridium communication characteristic-oriented processing on the wireless signals to obtain resolvable effective signal data, the information analysis subsystem is connected with the signal processing subsystem and used for analyzing the effective signal data to generate communication information used for representing iridium communication activities, and the monitoring and early warning subsystem is connected with the information analysis subsystem and used for performing monitoring and analysis based on the communication information and outputting corresponding monitoring results or early warning information. According to the scheme, the collection, processing, analysis and monitoring early warning of the iridium communication signals are integrated in a unified system architecture, so that continuous monitoring, structural analysis and timely early warning output of iridium communication activities are realized.

Inventors

WEN RUNHUI
XIA YUHANG
ZHOU XIAOSONG
SUN LU
SHEN GUO
HAN FENG
ZHAO XIAOGANG
DENG LAN

Assignees

成都瀚德科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260204

Claims (10)

1. An iridium monitoring and early warning system, characterized in that the system comprises: the signal acquisition subsystem is used for acquiring wireless signals in the iridium communication frequency band; The signal processing subsystem is connected with the signal acquisition subsystem and is used for executing iridium-oriented communication characteristic processing on the wireless signal so as to obtain resolvable effective signal data; The information analysis subsystem is connected with the signal processing subsystem and is used for analyzing the effective signal data and generating communication information used for representing iridium communication activities; And the monitoring and early warning subsystem is connected with the information analysis subsystem and is used for executing monitoring analysis based on the communication information and outputting corresponding monitoring results or early warning information.
2. The iridium monitoring and early warning system of claim 1, wherein the signal processing subsystem is configured to perform digital channelization processing on wireless signals output by the signal acquisition subsystem, wherein the channelization processing comprises: performing band-pass filtering processing on the wireless signal based on a preset frequency division rule to suppress non-target frequency band signals and form an input signal meeting channel division conditions; Performing sampling rate conversion processing on the wireless signal subjected to the band-pass filtering processing so as to enable the signal sampling rate to be matched with the channel bandwidth and the frequency resolution corresponding to a preset frequency division rule; Frequency domain division is carried out on the basis of the wireless signals subjected to sampling rate conversion processing, and signal data corresponding to a plurality of frequency sub-bands are generated; respectively carrying out energy calculation or time-frequency characteristic extraction on the signal data of each frequency sub-band; and determining a target sub-band containing iridium communication signals based on energy distribution or time-frequency characteristics corresponding to each frequency sub-band, and taking signal data corresponding to the target sub-band as effective signal data.
3. The iridium monitoring and early warning system of claim 2, wherein the signal processing subsystem, after determining the target sub-band, is further configured to perform a burst signal detection process on signals within the target sub-band, wherein the burst signal detection process comprises: Performing a sliding window analysis on the target subband signal in a time dimension; Identifying a burst signal segment based on a signal energy variation, frequency offset, or duration parameter within a window; The identified burst signal segments are marked or screened to form a data set of valid signal data.
4. The iridium monitoring and early warning system according to claim 1, wherein the information analysis subsystem is configured to perform demodulation processing on the effective signal data, and perform framing and field analysis on the data according to an iridium communication protocol structure on the basis of the demodulation processing, wherein the field analysis includes: Determining the position of each data field in a time domain or a frequency domain according to a preset frame structure rule; Performing bit-level or symbol-level parsing processing on the corresponding field; and combining the data fields obtained by analysis to generate communication information for representing iridium communication activities.
5. The iridium monitoring and early warning system of claim 4, wherein the information analysis subsystem is further configured to perform association processing on the communication information analyzed in different time periods or different frequency subbands, wherein the association processing includes: Matching the communication information based on time features, frequency features or frame structure features in the communication information; merging the communication information corresponding to the matching result into the same communication activity record; and outputting associated communication information for representing continuous or related iridium communication behaviors.
6. The iridium monitoring and early-warning system of claim 1, wherein the monitoring and early-warning subsystem is configured to perform a statistical analysis process on the communication information or the associated communication information, wherein the statistical analysis process comprises: counting the distribution characteristics of the communication information in the time dimension or the frequency dimension; Generating corresponding communication activity characteristic parameters based on a preset statistical rule; And taking the communication activity characteristic parameters as input data of monitoring judgment.
7. The iridium monitoring and early-warning system of claim 6, wherein the monitoring and early-warning subsystem is further configured to perform a rule-decision process based on the communication activity characteristic parameters, wherein the rule-decision process comprises: comparing the communication activity characteristic parameters with preset monitoring rules; generating a corresponding monitoring event record when the comparison result meets the preset condition; and storing or outputting the monitoring event record to form the monitoring result or the early warning information.
8. An iridium monitoring and early warning method, which is characterized in that the method is realized based on the iridium monitoring and early warning system according to any one of claims 1 to 7, and comprises the following steps: Acquiring wireless signals in an iridium communication frequency band; performing iridium communication characteristic-oriented signal processing on the wireless signal to obtain resolvable effective signal data; Analyzing the effective signal data to generate communication information for representing iridium communication activities; And executing monitoring analysis based on the communication information, and outputting corresponding monitoring results or early warning information.
9. The iridium monitoring and early warning method according to claim 8, wherein performing signal processing for iridium-oriented communication characteristics on the wireless signal to obtain resolvable valid signal data comprises: Frequency domain division is carried out on the wireless signals based on a preset frequency division rule, and signal data corresponding to a plurality of frequency sub-bands are generated; respectively carrying out energy calculation or time-frequency characteristic extraction on the signal data of each frequency sub-band; determining a target sub-band containing iridium communication signals based on energy distribution or time-frequency characteristics corresponding to each frequency sub-band, and taking signal data corresponding to the target sub-band as effective signal data; Performing a sliding window analysis on the target subband signal in a time dimension; Identifying a burst signal segment based on a signal energy variation, frequency offset, or duration parameter within a window; The identified burst signal segments are marked or screened to form a data set of valid signal data.
10. A computer readable storage medium having instructions stored thereon, which when executed on a computer cause the computer to perform the iridium monitoring and early warning method of any one of claims 8 and 9.

Description

Iridium monitoring and early warning system and method Technical Field The invention relates to the technical field of wireless communication signal monitoring, in particular to an iridium monitoring and early warning system and method. Background In the prior art, a traditional wideband signal searching and recording system is adopted for monitoring iridium satellites, a wideband receiver is generally used for the system, the iridium satellite frequency band is scanned and monitored, and the signals are recorded and data are acquired after the signals are found. This approach has major drawbacks: 1) The broadband receiver has low pertinence to the iridium frequency band, data is collected by the receiver and then transmitted to the terminal for decoding, the data processing pressure is high, the efficiency is low, the receiving sensitivity is low, and the sensitivity is lower along with the larger bandwidth. 2) The uplink signal and the downlink signal can only be monitored and received, and the uplink (user terminal to satellite) signal and the downlink (satellite to user terminal or gateway station) signal can not be associated and matched in real time, so that the signals are isolated, a complete communication link and service logic are difficult to restore, and real-time association mapping of identity information (IMEI (International Mobile Equipment Identity, international mobile equipment identity), IMSI (International Mobile Subscriber Identity ), TMIS (Temporary Mobile Identity, temporary mobile identity), opposite terminal number and the like based on the identity carried by the actual signal in the air), position information, service information (voice, short message, SBD (Short Burst Data), ACARS (Aircraft Communications ADDRESSING AND Reporting System, aviation communication addressing and Reporting System) and mail) can not be realized. 3) Multiple iridium users can have multiple frequencies in broadband at the same time, and continuous and stable acquisition and analysis are difficult to realize. 4) Each unit (receiving, processing and storing) of the system is discretized, the real-time performance is poor, and the rapid response and early warning of the instant communication event cannot be met. In view of the foregoing, there is a need for an integrated monitoring and early warning scheme capable of performing signal acquisition, processing and analysis for iridium communication characteristics, so as to realize effective monitoring and early warning of iridium communication activities while ensuring system integration level and real-time performance. Disclosure of Invention The embodiment of the invention aims to provide an iridium monitoring and early warning system and method, which at least solve the problem that iridium communication signals are difficult to effectively process, analyze and associate in the prior art. In order to achieve the above object, a first aspect of the present invention provides an iridium monitoring and early warning system, the system comprising: the signal acquisition subsystem is used for acquiring wireless signals in the iridium communication frequency band; The signal processing subsystem is connected with the signal acquisition subsystem and is used for executing iridium-oriented communication characteristic processing on the wireless signal so as to obtain resolvable effective signal data; The information analysis subsystem is connected with the signal processing subsystem and is used for analyzing the effective signal data and generating communication information used for representing iridium communication activities; And the monitoring and early warning subsystem is connected with the information analysis subsystem and is used for executing monitoring analysis based on the communication information and outputting corresponding monitoring results or early warning information. Optionally, the signal processing subsystem is configured to perform digital channelization processing on the wireless signal output by the signal acquisition subsystem, where the channelization processing includes: performing band-pass filtering processing on the wireless signal based on a preset frequency division rule to suppress non-target frequency band signals and form an input signal meeting channel division conditions; Performing sampling rate conversion processing on the wireless signal subjected to the band-pass filtering processing so as to enable the signal sampling rate to be matched with the channel bandwidth and the frequency resolution corresponding to a preset frequency division rule; Frequency domain division is carried out on the basis of the wireless signals subjected to sampling rate conversion processing, and signal data corresponding to a plurality of frequency sub-bands are generated; respectively carrying out energy calculation or time-frequency characteristic extraction on the signal data of each frequency sub-band; and determining a target sub-band con