CN110995374B - Black broadcast signal monitoring system - Google Patents
Black broadcast signal monitoring system Download PDFInfo
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- CN110995374B CN110995374B CN201910253230.1A CN201910253230A CN110995374B CN 110995374 B CN110995374 B CN 110995374B CN 201910253230 A CN201910253230 A CN 201910253230A CN 110995374 B CN110995374 B CN 110995374B
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- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
Abstract
The invention provides a black broadcast signal monitoring system, comprising: a black broadcast signal recognition device configured to detect a power attenuation pattern of a broadcast signal within a target area, compare the power attenuation pattern of the broadcast signal with a power attenuation pattern of a normal broadcast signal, and determine the broadcast signal as a black broadcast signal when a difference between the power attenuation pattern of the broadcast signal and the power attenuation pattern of the normal broadcast signal exceeds a preset threshold; the black broadcast signal positioning device is configured to determine the direction of the black broadcast signal in the target area according to the power attenuation mode of the black broadcast signal, perform signal positioning on the black broadcast signal based on the path loss value in the power attenuation mode of the black broadcast signal, and determine the sector and the location of the black broadcast signal; and the mobile monitoring device is configured to detect the determined location of the black broadcast signal and determine the position of the black broadcast signal. The scheme provided by the invention improves the accuracy and speed of positioning the black broadcast signal.
Description
Technical Field
The invention relates to the field of wireless communication, in particular to a black broadcast signal monitoring system.
Background
Radio monitoring is an important means of radio order management, and by utilizing monitoring equipment and technical means of a monitoring network and monitoring and direction-finding software, radio signals are measured, scanned, positioned, monitored and recorded, and the radio signals and characteristics thereof are collected, stored and analyzed, so that the management of radio frequency spectrum order is realized. Among them, black broadcast monitoring is a difficult and important aspect in radio monitoring.
According to the new edition radio management regulation of the people's republic of China, which is implemented in 2016, 12, 1, the method strengthens the special frequency protective monitoring of important industries, plays the role of a long-acting mechanism, and is matched with related departments to seriously strike illegal station setting behaviors of ' pseudo base stations ', ' black broadcasting ', and the like, which relate to novel crimes of telecommunication networks. Meanwhile, the explanation of the problems of the highest people's court and the highest people's inspection hospital about the handling of law applicable to criminal cases such as the disturbed radio communication management order is already carried out in the 17 th meeting of the highest people's court in 2017 at the 1715 th meeting of the highest people's court trial committee, in the 64 th meeting of the twelfth inspection committee in the 5 th month in 2017 at the 25 th meeting of the highest people's inspection hospital in 2017 at the 1 st month in 2017. Therefore, fast and accurate monitoring and finding of black broadcasting is of great significance to radio spectrum order management.
Because the black broadcast using frequency, signal power and modulation mode may be the same as normal broadcast, the traditional black broadcast monitoring method mainly monitors and finds the black broadcast in forms of manual discrimination, one-way monitoring or mass reporting, and the like, and then finds the black broadcast in a field detection mode.
The black broadcasting is characterized by low cost, flexible concealment, uncertain use time along with starting and the like, and the existing manual discrimination method is difficult to intercept and monitor due to limited equipment and high cost of equipment, interception and mobile monitoring personnel; meanwhile, the black broadcast is often hidden in position, the time cost required for accurate positioning is high, the black broadcast is often shut down and the position is shifted in the positioning process, and the monitoring of the black broadcast is very difficult. Therefore, the existing method for monitoring and monitoring the black broadcasting content in cooperation with manual mobile monitoring has poor timeliness and high cost, and is difficult to effectively capture the black broadcasting station.
Disclosure of Invention
The present invention provides a black broadcast signal monitoring system to overcome the above problems or at least partially solve the above problems.
According to an aspect of the present invention, there is provided a black broadcasting signal monitoring system including:
the black broadcast signal identification device is configured to detect a power attenuation mode of a broadcast signal in a target area, compare the detected power attenuation mode of the broadcast signal with a power attenuation mode of a normal broadcast signal stored in a radio frequency gene library corresponding to the target area, and determine the broadcast signal as a black broadcast signal when a difference between the power attenuation mode of the broadcast signal and the power attenuation mode of the normal broadcast signal exceeds a preset threshold;
the black broadcast signal positioning device is configured to determine the azimuth of the black broadcast signal in the target area according to the detected power attenuation mode of the black broadcast signal, perform signal positioning on the black broadcast signal based on a path loss value in the power attenuation mode of the black broadcast signal, and determine a sector and a location of the black broadcast signal;
and the mobile monitoring device is configured to detect the determined location of the black broadcast signal and determine the position of the black broadcast signal.
Optionally, the black broadcast signal identification device includes: at least two broadcast signal detection stations are provided within the target area.
Optionally, the power attenuation mode of the broadcast signal includes: the power value of the broadcast signal detected by each broadcast signal detection station and the path loss value of the broadcast signal between any two broadcast signal detection stations;
the power attenuation pattern of the normal broadcast signal includes: the power value of the normal broadcast signal propagating to each of the broadcast signal detection stations and the path loss value of the normal broadcast signal between any two of the broadcast signal detection stations.
Optionally, the black broadcast signal identifying device is further configured to;
and when the difference value between the path loss value of the normal broadcast signal between two broadcast signal detection stations and the path loss value of the broadcast signal between the same two broadcast signal detection stations is greater than the preset threshold value, determining the broadcast signal as the black broadcast signal.
Optionally, the location of the black broadcasting signal includes: the building where the black broadcast signal is located.
The technical scheme provided by the invention realizes automatic monitoring of the black broadcast signals to a great extent based on the radio frequency gene library, greatly improves the positioning precision and speed of the black broadcast signals, and reduces the workload of detection personnel.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic configuration diagram of a black broadcast signal monitoring system according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a difference between power attenuation patterns of a normal broadcast signal and a black broadcast signal according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It should be noted that the technical features of the embodiments and the preferred embodiments of the present invention can be combined with each other without conflict.
Fig. 1 is a schematic diagram of a black broadcast signal monitoring system according to an embodiment of the present invention. As shown in fig. 1, a black broadcast signal monitoring system 10 according to an embodiment of the present invention includes:
a black broadcast signal recognition device 12 configured to detect a power attenuation pattern of a broadcast signal within a target area, compare the detected power attenuation pattern of the broadcast signal with a power attenuation pattern of a normal broadcast signal stored in a radio frequency gene library corresponding to the target area, and determine the broadcast signal as a black broadcast signal when a difference between the power attenuation pattern of the broadcast signal and the power attenuation pattern of the normal broadcast signal exceeds a preset threshold;
a black broadcasting signal locating device 14 configured to determine the azimuth of the black broadcasting signal in the target area based on the detected power attenuation pattern of the black broadcasting signal, perform signal locating on the black broadcasting signal based on the path loss value in the power attenuation pattern of the black broadcasting signal, and determine the sector and the location of the black broadcasting signal;
and the mobile monitoring device 16 is configured to detect the determined location of the black broadcast signal and determine the position of the black broadcast signal.
The present embodiment provides a black broadcast signal monitoring system 10 that finds black broadcast signals using coarse, medium, and fine third order positioning. The black broadcast signal identification device 12, the black broadcast signal positioning device 14, and the mobile monitoring device 16 may be connected to each other in a wired or wireless manner, and the present invention is not limited in particular.
First, it is necessary to pre-establish a radio frequency gene library of radio broadcasting in a target area, where the radio frequency gene library includes standard a priori information of radio broadcasting signals in the area, such as a power attenuation pattern of a normal broadcasting signal in the area.
On the basis, the black broadcast signal identification device 12 can quickly identify the black broadcast signal by a quick coarse scanning method according to the characteristics that the black broadcast signal is lower in antenna position, small in transmission power and fast in attenuation compared with the normal broadcast signal, and then the black broadcast signal positioning device 14 determines the direction of the black broadcast signal, namely the general direction and the region of the black broadcast signal in the target region.
The black broadcast signal locating device 14 can further determine the sector and the location of the black broadcast signal, such as the building where the black broadcast signal is located, according to the specific signal attenuation degree of the black broadcast signal, in a medium-scanning manner and by referring to the radio frequency gene library.
Finally, the mobile monitoring device 16, in combination with the rf gene library, can quickly find the specific location of the black broadcast signal.
As can be seen from the above description, the black broadcast signal monitoring system 10 provided in this embodiment realizes automatic monitoring of black broadcast signals to a great extent based on the radio frequency gene library, greatly improves the accuracy and speed of positioning of black broadcast signals, and reduces the workload of detection personnel.
In the above embodiment, the black broadcast signal identifying apparatus 12 may include at least two broadcast signal detecting stations provided in the target area, and the black broadcast signal identifying apparatus 12 functions may be implemented based on these broadcast signal detecting stations. In the course of a specific embodiment, the black broadcast signal locating device 14 may also be implemented based on a broadcast signal detecting station, and of course, it may be implemented as a stand-alone device, according to different needs.
At this time, the power attenuation pattern of the broadcast signal can be characterized as: the power value of the broadcast signal detected by each broadcast signal detection station and the path loss value of the broadcast signal between any two broadcast signal detection stations. Accordingly, the power attenuation pattern of a normal broadcast signal can then be characterized as: the power value of the normal broadcast signal propagating to each broadcast signal detection station and the path loss value of the normal broadcast signal between any two broadcast signal detection stations.
As for the characteristics that the antenna position of the transmitting tower of the black broadcast signal is lower and the attenuation is faster than that of the normal broadcast signal, referring to fig. 2, if the monitoring station is located at the same position, the attenuation of the black broadcast signal in a certain distance is larger than that of the normal broadcast signal due to the factors of low antenna position, more obstacles (fast attenuation) in the city, small transmitting power and the like, that is: ls is P1-P2 < Ls ' is P1 ' -P2 '.
At this time, the difference between the power attenuation pattern of the broadcast signal and the power attenuation pattern of the normal broadcast signal exceeds the preset threshold, that is, the difference between the path loss value of the normal broadcast signal between two broadcast signal detection stations and the path loss value of the broadcast signal between the same two broadcast signal detection stations is greater than the preset threshold. The black broadcast signal recognition device 12 can quickly recognize the black broadcast signal in the target area by detecting the above-described situation.
In the above embodiments of the present invention, the rf gene is based on the concept of rf fingerprint. Radio Frequency Fingerprint (RFF) of Radio equipment is the essential characteristics of the physical layer of the equipment extracted by analyzing the output signal of the Radio equipment, including the information of the operating Frequency, signal power, modulation mode, etc. of the Radio equipment. The radio frequency gene of the radio communication environment refers to the basic characteristics of the radio communication environment in a certain geographic area range, and comprises information of longitude and latitude coordinates, a coverage area range, a radio monitoring frequency band, the total power of a monitoring receiving signal, a modulation mode of the monitoring receiving signal, a frequency spectrum schematic diagram of the monitoring receiving signal, a power attenuation mode of the radio signal and the like of the radio communication environment, wherein the radio frequency gene library is a set of all radio frequency genes in the certain geographic area range, the radio frequency gene library containing the coverage radio monitoring frequency band is constructed, standard prior information of the radio communication environment in the certain geographic area can be provided, and the efficiency and accuracy of radio management work are improved. The establishment of the radio frequency gene library is a progressive and long process, a radio management mechanism is required to store monitoring data with a certain magnitude in the initial construction, and the radio frequency gene library data is continuously updated in the later period according to the radio monitoring data.
The embodiment of the invention provides a black broadcast signal monitoring system capable of rapidly and intelligently finding black broadcast signals in a coarse, medium and fine three-order positioning mode. The black broadcast signal monitoring system provided by the embodiment of the invention realizes automatic monitoring of black broadcast signals to a great extent based on a radio frequency gene library in a certain environment, greatly improves the positioning precision and speed of the black broadcast signals, and reduces the workload of detection personnel.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments can be modified or some or all of the technical features can be equivalently replaced within the spirit and principle of the present invention; such modifications or substitutions do not depart from the scope of the present invention.
Claims (2)
1. A black broadcast signal monitoring system, comprising:
the black broadcast signal identification device is configured to detect a power attenuation mode of a broadcast signal in a target area, compare the detected power attenuation mode of the broadcast signal with a power attenuation mode of a normal broadcast signal stored in a radio frequency gene library corresponding to the target area, and determine the broadcast signal as a black broadcast signal when a difference between the power attenuation mode of the broadcast signal and the power attenuation mode of the normal broadcast signal exceeds a preset threshold;
the black broadcast signal positioning device is configured to determine the azimuth of the black broadcast signal in the target area according to the detected power attenuation mode of the black broadcast signal, perform signal positioning on the black broadcast signal based on a path loss value in the power attenuation mode of the black broadcast signal, and determine a sector and a location of the black broadcast signal;
the mobile monitoring device is configured to detect the determined location of the black broadcast signal and determine the position of the black broadcast signal;
the black broadcast signal recognition apparatus includes: at least two broadcast signal detection stations arranged in the target area;
the power attenuation pattern of the broadcast signal includes: the power value of the broadcast signal detected by each broadcast signal detection station and the path loss value of the broadcast signal between any two broadcast signal detection stations;
the power attenuation pattern of the normal broadcast signal includes: a power value of the normal broadcast signal propagating to each of the broadcast signal detection stations and a path loss value of the normal broadcast signal between any two of the broadcast signal detection stations;
the black broadcast signal recognition device is further configured to: and when the difference value between the path loss value of the normal broadcast signal between two broadcast signal detection stations and the path loss value of the broadcast signal between the same two broadcast signal detection stations is greater than the preset threshold value, determining the broadcast signal as the black broadcast signal.
2. The system of claim 1, the location of the black broadcast signal comprising: the building where the black broadcast signal is located.
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| CN111917494B (en) * | 2020-08-25 | 2022-05-06 | 成都华乾科技有限公司 | Black broadcast signal monitoring and positioning method and system |
| CN112929103A (en) * | 2021-01-26 | 2021-06-08 | 赵炳健 | Illegal broadcasting station detection method and system |
| CN113572555B (en) * | 2021-08-17 | 2023-11-17 | 张立嘉 | Black broadcast monitoring method based on zero sample learning |
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