CN110492952B - Signal shielding detection method and system - Google Patents
Signal shielding detection method and system Download PDFInfo
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- CN110492952B CN110492952B CN201910754646.1A CN201910754646A CN110492952B CN 110492952 B CN110492952 B CN 110492952B CN 201910754646 A CN201910754646 A CN 201910754646A CN 110492952 B CN110492952 B CN 110492952B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/15—Performance testing
- H04B17/18—Monitoring during normal operation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/60—Jamming involving special techniques
- H04K3/62—Jamming involving special techniques by exposing communication, processing or storing systems to electromagnetic wave radiation, e.g. causing disturbance, disruption or damage of electronic circuits, or causing external injection of faults in the information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/60—Jamming involving special techniques
- H04K3/68—Jamming involving special techniques using passive jamming, e.g. by shielding or reflection
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention relates to a signal shielding detection method and system, wherein a shielding system receives a base station signal first, generates and transmits a shielding signal according to the base station signal, the shielding signal can shield the base station signal from being received by a terminal device, a base station signal frequency spectrum can be obtained in a time slot of the shielding system receiving the base station signal, a shielding signal frequency spectrum can be obtained in a time slot of the shielding system transmitting the shielding signal, the shielding effect performance (depth of intensity difference) of the shielding system on the base station signal can be obtained by utilizing the relation between the two frequency spectrums, and because the time slot of the shielding system receiving the base station signal and the time slot of the shielding system transmitting the shielding signal are the time slot of the same shielding period of the shielding system in work, the detection can be realized when the shielding system normally works, the shielding system does not need to be closed to test the base station signal intensity, thereby simplifying the operation of the shielding system in detection, the process of detecting the shielding performance is more convenient and faster.
Description
Technical Field
The present invention relates to the field of signal processing technologies, and in particular, to a method and a system for signal mask detection.
Background
With the continuous development of communication technology, communication signals cover almost all areas of life. For some specific places, there is a need to shield communication signals, such as various examination rooms, courtrooms, hospitals, heavy military places, etc., and signal shielding devices are usually erected at the places where signal shielding is needed to block normal communication of the communication network in a specific area.
In order to detect the signal shielding performance of the signal shielding equipment, the signal strength of a communication base station is generally tested before shielding is not started; and then after the shielding is started, testing the relative relation between the signal of the communication base station and the strength of the shielding signal, and judging the shielding effect.
In the process of implementing the technical scheme of the invention, the inventor finds that the following problems exist in the traditional technology: in the process of verifying the shielding performance of the signal shielding device, the signal shielding device needs to be operated at least twice, the signal shielding device is closed and then opened, the signal intensity is tested twice, the operation is inconvenient, and the signal shielding is stopped when the shielding system is closed, which is not allowed in some signal shielding scenes.
Disclosure of Invention
Therefore, it is necessary to provide a signal shielding detection method and system for the conventional method that the signal shielding device needs to be turned off first and then turned on, and the signal strength is tested twice to detect the shielding performance, which is inconvenient to operate.
A signal mask detection method, comprising the steps of:
in the time slot of the shielding system for receiving the base station signal, acquiring a base station signal frequency spectrum; the shielding system is used for generating shielding signals according to base station signals and transmitting the shielding signals;
acquiring a shielding signal frequency spectrum in a time slot for transmitting a shielding signal by a shielding system; the time slot for receiving the base station signal by the shielding system and the time slot for transmitting the shielding signal by the shielding system are the time slots of the shielding system in a shielding period;
and detecting the shielding performance of the shielding system according to the base station signal spectrum and the shielding signal spectrum.
According to the signal shielding detection method, the shielding system receives the base station signal firstly, generates and transmits the shielding signal according to the base station signal, the shielding signal can shield the base station signal to be received by the terminal equipment, the base station signal frequency spectrum can be obtained in the time slot of the shielding system for receiving the base station signal, the shielding signal frequency spectrum can be obtained in the time slot of the shielding system for transmitting the shielding signal, the shielding effect performance (the depth of intensity difference) of the shielding system on the base station signal can be known by utilizing the relation between the two frequency spectrums, the shielding system can be detected when working normally, the strength of the base station signal is not required to be tested when the shielding system is closed (the shielding system is not allowed to be closed in some places), thereby the operation on the shielding system during detection is simplified, and the performance detection process of the shielding system is more convenient and faster.
In one embodiment, the time slot in which the masking system receives the base station signal and the time slot in which the masking system transmits the masking signal are time slots in a masking period of the masking system.
In one embodiment, the time slot for receiving the base station signal by the masking system and the time slot for transmitting the masking signal by the masking system are the time slots of the same masking period in one masking period by the masking system.
In one embodiment, the step of obtaining the spectrum of the mask signal in the time slot in which the mask system transmits the mask signal comprises the following steps:
acquiring a plurality of emission frame shielding signals in a time slot of a shielding system for emitting the shielding signals;
acquiring a shielding signal frequency spectrum according to a specified emission frame shielding signal in a plurality of emission frame shielding signals;
or acquiring a shielding signal frequency spectrum according to an average value of a plurality of emission frame shielding signals;
or acquiring the frequency spectrum of the shielding signal according to the extremum of the shielding signals of a plurality of transmitting frames.
In one embodiment, the step of detecting the masking capability of the masking system based on the base station signal spectrum and the masking signal spectrum comprises the steps of:
obtaining a shielding depth spectrogram according to the frequency spectrum difference between the base station signal frequency spectrum and the shielding signal frequency spectrum;
and judging the shielding performance of the shielding system according to the shielding depth frequency spectrogram.
In one embodiment, the step of obtaining the masked depth spectrogram according to the spectral difference between the base station signal spectrum and the mask signal spectrum comprises the following steps:
acquiring first power of each frequency bandwidth according to a base station signal spectrum, and acquiring second power corresponding to each frequency bandwidth according to a shielding signal spectrum;
and acquiring a power difference value of a corresponding frequency bandwidth according to each first power and each second power, and acquiring a shielded depth spectrum map according to the power difference value of each frequency bandwidth.
In one embodiment, the step of determining the shielding performance of the shielding system according to the shielding depth spectrogram comprises the following steps:
and aiming at any frequency bandwidth, comparing the power difference value corresponding to the frequency bandwidth with a reference value, and judging the shielding performance of the shielding system according to the comparison result of each frequency bandwidth.
In one embodiment, the step of detecting the masking capability of the masking system according to the base station signal spectrum and the masking signal spectrum further comprises the steps of:
and acquiring shielding situation information of a full spectrum according to the shielding depth requirement of the base station and the comparison result of each frequency bandwidth, and displaying the frequency data with insufficient shielding, wherein the frequency data with insufficient shielding comprises the frequency data with a power difference value smaller than a reference value.
In one embodiment, before the step of masking the time slot in which the system receives the base station signal and acquiring the spectrum of the base station signal, the method further comprises the following steps:
signal synchronization with the masking system is established.
In one embodiment, the step of establishing signal synchronization with the masking system comprises the steps of:
when the shielding system works, time domain sampling is carried out on the signal spectrum amplitude of the shielding system; the time slot for shielding system work comprises a time slot for shielding system receiving base station signals and a time slot for shielding system transmitting shielding signals;
and monitoring the time domain variation of the signal spectrum amplitude, and establishing signal synchronization with the shielding system according to the time domain variation.
In one embodiment, the step of monitoring the time-domain variations in the spectral amplitude of the signal and establishing signal synchronization with the masking system based on the time-domain variations comprises the steps of:
and monitoring the falling edge of the signal spectrum amplitude, and taking the moment of the falling edge as the starting moment of signal synchronization.
A signal mask detection system comprising:
the first acquisition unit is used for acquiring a base station signal frequency spectrum in a time slot of a shielding system for receiving a base station signal; the shielding system is used for generating shielding signals according to base station signals and transmitting the shielding signals;
the second acquisition unit is used for acquiring a shielding signal frequency spectrum in a time slot of a shielding system for transmitting a shielding signal;
and the shielding detection unit is used for detecting the shielding performance of the shielding system according to the base station signal frequency spectrum and the shielding signal frequency spectrum.
According to the signal shielding detection system, the shielding system receives the base station signal first, generates and transmits a shielding signal according to the base station signal, the shielding signal can shield the base station signal from being normally received by the terminal equipment, the first obtaining unit is used for shielding the time slot of the base station signal received by the system, can obtain the frequency spectrum of the base station signal, the second obtaining unit obtains the frequency spectrum of the shielding signal in the time slot of the shielding system for transmitting the shielding signal, the shielding detection unit can obtain the shielding (depth of intensity difference) effect performance of the shielding system to the base station signal by utilizing the relationship between the two frequency spectrums, the detection can be carried out when the shielding system works, the signal strength of a base station is not required to be tested when the shielding system is closed (the shielding system is not allowed to be closed in some places), therefore, the operation of the shielding system during detection is simplified, and the performance detection process of the shielding system is more convenient and faster.
In one embodiment, the time slot in which the masking system receives the base station signal and the time slot in which the masking system transmits the masking signal are time slots in a masking period of the masking system.
In one embodiment, the time slot for receiving the base station signal by the masking system and the time slot for transmitting the masking signal by the masking system are the time slots of the same masking period in one masking period by the masking system.
In one embodiment, the second obtaining unit is configured to obtain a plurality of transmission frame mask signals in a time slot in which the mask system transmits the mask signal; acquiring a shielding signal frequency spectrum according to a specified emission frame shielding signal in a plurality of emission frame shielding signals; or acquiring a shielding signal frequency spectrum according to an average value of a plurality of emission frame shielding signals; or acquiring the frequency spectrum of the shielding signal according to the extremum of the shielding signals of a plurality of transmitting frames.
In one embodiment, the mask detection unit is configured to obtain a mask depth spectrogram according to a spectrum difference between a base station signal spectrum and a mask signal spectrum; and judging the shielding performance of the shielding system according to the shielding depth frequency spectrum image.
In one embodiment, the shielding detection unit is configured to obtain a first power of each frequency bandwidth according to a base station signal spectrum, and obtain a second power corresponding to each frequency bandwidth according to the shielding signal spectrum; and acquiring a power difference value of a corresponding frequency bandwidth according to each first power and each second power, and acquiring a shielded depth spectrum map according to the power difference value of each frequency bandwidth.
In one embodiment, the shielding detection unit is configured to compare a power difference value corresponding to any frequency bandwidth with a reference value, and determine the shielding performance of the shielding system according to a comparison result of each frequency bandwidth.
In one embodiment, the shielding detection unit is configured to obtain shielding situation information of a full spectrum according to a shielding depth requirement of the base station and a comparison result of each frequency bandwidth, and display frequency data with insufficient shielding, where the frequency data with insufficient shielding includes frequency data with a power difference smaller than a reference value.
In one embodiment, the signal masking detection system further comprises a signal synchronization unit for establishing signal synchronization with the masking system.
In one embodiment, the signal synchronization unit is further configured to perform time-domain sampling on the signal spectrum amplitude of the masking system when the masking system is in operation; monitoring the time domain variation of the signal spectrum amplitude, and establishing signal synchronization with a shielding system according to the time domain variation; the time slot for shielding system operation includes the time slot for shielding system receiving base station signal and the time slot for shielding system transmitting shielding signal.
In one embodiment, the signal synchronization unit is further configured to monitor a falling edge of the signal spectrum amplitude, and use the time of the falling edge as the start time of the signal synchronization.
A signal masking system comprising a feedback regulation system, a signal masking detection system as described above and a masking system;
the feedback regulation system is used for acquiring frequency data with insufficient shielding according to the base station signal frequency spectrum and the shielding signal frequency spectrum and feeding the frequency data back to the shielding system; wherein the masking system adjusts the masking signal according to the frequency data.
According to the signal shielding system, the detection can be carried out when the shielding system works, and the shielding system does not need to be closed to test the signal intensity of the base station, so that the operation of the shielding system during the detection is simplified, and the performance detection process of the shielding system is more convenient and faster; and the frequency data with insufficient shielding can be fed back to the shielding system through the feedback adjusting system, and the shielding system adjusts the shielding signal according to the frequency data, so that the shielding performance of the shielding system is further optimized.
A readable storage medium having stored thereon an executable program which, when executed by a processor, performs the steps of the signal mask detection method described above.
The readable storage medium can realize that the shielding effect performance (the depth of the intensity difference) of the shielding system on the base station signal can be known by utilizing the relation between the two frequency spectrums through the stored executable program, and the detection can be carried out when the shielding system works without closing the shielding system to test the base station signal intensity (the shielding system is not allowed to be closed in some places), thereby simplifying the operation of the shielding system during the detection and enabling the performance detection process of the shielding system to be more convenient and faster.
The signal shielding detection device comprises a memory and a processor, wherein the memory stores an executable program, and the processor executes the executable program to realize the steps of the signal shielding detection method.
According to the signal shielding detection equipment, the shielding effect performance (the depth of the intensity difference) of the shielding system on the base station signal can be known by utilizing the relation between the two frequency spectrums by running the executable program on the processor, the detection can be carried out when the shielding system works, the base station signal intensity is not required to be tested when the shielding system is closed (the shielding system is not allowed to be closed in some places), the operation on the shielding system during detection is simplified, and the performance detection process of the shielding system is more convenient and faster.
Drawings
FIG. 1 is a schematic flow chart diagram of a signal mask detection method in one embodiment;
FIG. 2 is a diagram of a masked depth spectrum in one embodiment;
FIG. 3 is a schematic diagram of a shielding system in one embodiment;
FIG. 4 is a diagram of FDD system frame synchronization in one embodiment;
FIG. 5 is a diagram illustrating TDD system frame synchronization according to an embodiment;
FIG. 6 is a schematic diagram of air RF strength trigger synchronization in one embodiment;
FIG. 7 is a graph of a spectrum before a mask is turned on in one embodiment;
FIG. 8 is a graph of a spectrum after masking is turned on in one embodiment;
FIG. 9 is a schematic diagram of a signal shield detection system in one embodiment;
FIG. 10 is a schematic diagram of a signal mask detection system in another embodiment;
fig. 11 is a schematic structural diagram of a signal shielding system in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
It should be noted that the term "first \ second" referred to in the embodiments of the present invention only distinguishes similar objects, and does not represent a specific ordering for the objects, and it should be understood that "first \ second" may exchange a specific order or sequence when allowed. It should be understood that "first \ second" distinct objects may be interchanged under appropriate circumstances such that embodiments of the invention described herein may be practiced in sequences other than those illustrated or described herein.
The described embodiments are only a part of the embodiments of the present invention, not all embodiments, and all other embodiments obtained by those skilled in the art without inventive efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The signal shielding detection method provided by the application can be applied to various application environments of signal shielding equipment capable of receiving base station signals.
Fig. 1 is a schematic flow chart of a signal mask detection method according to an embodiment of the present invention. The signal mask detection method in this embodiment includes the steps of:
step S110: in the time slot of the shielding system for receiving the base station signal, acquiring a base station signal frequency spectrum; the shielding system is used for generating a shielding signal according to a base station signal and transmitting the shielding signal;
in this step, the shielding system may be a system that uses a store-and-forward manner to shield the communication signal, and during the working process, the shielding system first receives the base station signal, generates a shielding signal according to the base station signal, and transmits the shielding signal for shielding the base station signal; detecting the shielding performance of the shielding system, and acquiring a base station signal frequency spectrum at the time slot when the shielding system receives the base station signal;
step S120: acquiring a shielding signal frequency spectrum in a time slot for transmitting a shielding signal by a shielding system;
in the step, the shielding system receives the base station signal when working, and obtains the shielding signal based on the base station signal, and the receiving of the base station signal and the transmitting of the shielding signal are both carried out when the shielding system works normally, so that the shielding system does not need to be closed in the process; in addition, a shielding signal can be obtained from the space environment where the shielding system is located, and a corresponding shielding signal spectrum can be obtained; or, the shielding system may detect the shielding signal (mixed base station signal), analyze and obtain the base station signal spectrum and store it, and retrieve the shielding signal spectrum from the storage medium of the shielding system;
step S130: detecting the shielding performance of the shielding system according to the base station signal frequency spectrum and the shielding signal frequency spectrum;
in this step, the spectrum of the base station signal is the spectrum when the signal is in normal communication, the spectrum of the mask signal is the spectrum when the mask signal is transmitted and mixed with the normal base station signal, and by comparing the two spectrums, the signal communication state under the transmission mask signal can be determined, so as to detect the mask performance of the mask system.
In this embodiment, the above process can be implemented in the present muting detection system, which receives the base station signal first, generating and transmitting a masking signal based on the base station signal, the masking signal being capable of masking the base station signal for reception by the terminal device, in the time slot of the shielding system for receiving the base station signal, the shielding detection system can acquire the frequency spectrum of the base station signal, in the time slot of the shielding system for transmitting the shielding signal, the shielding detection system obtains the frequency spectrum of the shielding signal, the shielding effect performance (the depth of the intensity difference) of the shielding system to the base station signal can be obtained by utilizing the relationship between the two frequency spectrums, the detection can be carried out when the shielding system works normally, the signal strength of a base station is not required to be tested when the shielding system is closed (the shielding system is not allowed to be closed in some places), therefore, the operation of the shielding system during detection is simplified, and the performance detection process of the shielding system is more convenient and faster.
Further, the time slot in which the masking system receives the base station signal and the time slot in which the masking system transmits the masking signal may be the time slot of the masking system within a masking period.
Further, the time slot for receiving the base station signal by the masking system and the time slot for transmitting the masking signal by the masking system may be the time slot of the same masking period in one masking period by the masking system.
It should be noted that the time slot for receiving the base station signal by the shielding system and the time slot for transmitting the shielding signal by the shielding system may not be limited to the same shielding period, and the shielding system in a general fixed location may also receive the base station signal substantially stably, and the shielding signal is also substantially stable, considering that the transmission power of the base station fluctuates with time, the comparability in the same shielding period is better. A shielding period, that is, the number of frame cycles of receiving and forwarding, where the frame duration of LTE is 10 milliseconds, for example, when the number of forwarding frames is 99 times, the shielding period is 1 second; a masking period may be understood as a greater number of masking cycles.
In one embodiment, the step of obtaining the spectrum of the mask signal in the time slot in which the mask system transmits the mask signal comprises the following steps:
acquiring a plurality of emission frame shielding signals in a time slot of a shielding system for emitting the shielding signals;
acquiring a shielding signal frequency spectrum according to a specified emission frame shielding signal in a plurality of emission frame shielding signals;
or acquiring a shielding signal frequency spectrum according to an average value of a plurality of emission frame shielding signals;
or acquiring the frequency spectrum of the shielding signal according to the extremum of the shielding signals of a plurality of transmitting frames.
In this embodiment, there may be a plurality of transmission frames in the time slot of the shielding system for transmitting the shielding signal, and the signal of each transmission frame may be affected by various factors during the transmission process, so that there is a difference, and in addition, the transmission power of the signal transmitted by the base station also changes over time due to the change of the user service; therefore, when acquiring the mask signal spectrum, a specified number of the transmission frame mask signals may be selected from the plurality of transmission frame mask signals, or an average value of the plurality of transmission frame mask signals may be selected, or an extreme value of the plurality of transmission frame mask signals may be selected, so as to acquire the mask signal spectrum.
Specifically, for example, in a mask period (including a receiving base station signal time slot plus a transmitting mask signal time slot), the transmitting frame has 20, 30, 40, or 50 frames, etc., taking 30 frames as an example, any transmitting frame signal may be specified in advance to perform calculation and acquisition of a mask signal spectrum; or appointing any plurality of (needing smoothing processing) emission frame signals in advance to carry out calculation acquisition of the shielding signal spectrum; or odd frame or even frame (needing smoothing) appointed frame) signals are selected to calculate and obtain the frequency spectrum of the shielding signals; the average value or the extreme value of the mask signal of the 30 frames of transmission frames can also be selected for the calculation of the spectrum of the mask signal, where the extreme value can be a maximum value, a minimum value, etc., and the scheme adopting the minimum value is preferable.
In one embodiment, the step of detecting the muting performance of the muting system based on the base station signal spectrum and the muting signal spectrum comprises the steps of:
obtaining a shielding depth spectrogram according to the frequency spectrum difference between the base station signal frequency spectrum and the shielding signal frequency spectrum;
and judging the shielding performance of the shielding system according to the shielding depth frequency spectrum image.
In this embodiment, the shielding signal transmitted by the shielding system is larger than the base station signal, so as to effectively shield the base station signal, and the corresponding signal spectrum may change, which is specifically shown that the amplitude of the shielding signal spectrum may be different from the amplitude of the base station signal spectrum, that is, the spectrum amplitude in the time slot of receiving the base station signal may be smaller than the spectrum amplitude in the time slot of transmitting the shielding signal, and the spectrum difference between the two may reflect the shielding depth, so as to obtain the shielding depth spectrogram, as shown in fig. 2, the dotted line is the spectrogram after mixing the shielding signal with the base station signal, the solid line is the spectrogram of the base station signal, and the shielding depth spectrogram may be used to determine the shielding performance of the shielding system.
In one embodiment, the step of obtaining the masked depth spectrogram from the spectral difference between the base station signal spectrum and the masked signal spectrum comprises the steps of:
acquiring first power of each frequency bandwidth according to a base station signal spectrum, and acquiring second power corresponding to each frequency bandwidth according to a shielding signal spectrum;
acquiring a power difference value of a corresponding frequency bandwidth according to each first power and each second power, and acquiring a shielded depth spectrogram according to the power difference value of each frequency bandwidth;
the step of judging the shielding performance of the shielding system according to the shielding depth spectrogram comprises the following steps:
and aiming at any frequency bandwidth, comparing the power difference value corresponding to the frequency bandwidth with a reference value, and judging the shielding performance of the shielding system according to the comparison result of each frequency bandwidth.
In this embodiment, the base station signal spectrum and the shielding signal spectrum both record powers of a plurality of spectrum bandwidths, which represent the strengths of signals with corresponding frequencies, the shielding signal transmitted by the shielding system is greater than the base station signal, the corresponding signal spectrum changes, the power of the spectrum bandwidth in the shielding signal spectrum is greater than the power of the spectrum bandwidth in the base station signal spectrum, and a shielding depth spectrogram can be obtained by using the difference between the two powers; and comparing the power difference value of each frequency bandwidth in the shielding depth frequency spectrum diagram with a preset reference value so as to judge the shielding performance of the shielding system.
In one embodiment, the step of detecting the masking capability of the masking system based on the base station signal spectrum and the masking signal spectrum further comprises the steps of:
and acquiring shielding situation information of a full spectrum according to the shielding depth requirement of the base station and the comparison result of each frequency bandwidth, and displaying the frequency data with insufficient shielding, wherein the frequency data with insufficient shielding comprises the frequency data with a power difference value smaller than a reference value.
In this embodiment, a base station signal can be effectively shielded only by a proper shielding depth, the shielding depth requirement includes that a power difference value of each frequency bandwidth is greater than or equal to a reference value, a comparison result of each frequency bandwidth in a shielding depth spectrogram is compared with the shielding depth requirement of the base station, shielding situation information of a full spectrum can be obtained and reflected in a shielding state of each frequency bandwidth of the full spectrum, and frequency data with insufficient shielding can be highlighted to provide a basis for adjustment of the shielding signal; in addition, it should be noted that the reference value corresponding to each frequency bandwidth may be different.
In one embodiment, before the step of masking the time slot in which the system receives the base station signal and acquiring the spectrum of the base station signal, the method further comprises the following steps:
signal synchronization with the masking system is established.
In this embodiment, before obtaining the spectrum of the base station signal, it is necessary to establish signal synchronization with the masking system to know the time slots for the masking system to receive the base station signal and transmit the masking signal, so as to accurately obtain the spectrum of the base station signal and the spectrum of the masking signal.
Further, the shielding System itself has a synchronization mechanism, and generally adopts free synchronization, GPS (Global Positioning System) synchronization, LTE (Long Term Evolution) System frame signal synchronization, or the like, and when establishing signal synchronization with the shielding System, a synchronization method the same as that of the shielding System, such as GPS signal synchronization or LTE System frame signal synchronization, or the like, may be adopted.
In one embodiment, the step of establishing signal synchronization with the masking system comprises the steps of:
when the shielding system works, time domain sampling is carried out on the signal spectrum amplitude of the shielding system; the time slot for shielding system work comprises a time slot for shielding system receiving base station signals and a time slot for shielding system transmitting shielding signals;
and monitoring the time domain variation of the signal spectrum amplitude, and establishing signal synchronization with the shielding system according to the time domain variation.
In this embodiment, when the shielding system works normally, receiving a base station signal and transmitting a shielding signal are performed alternately, and the two time slots are in one shielding period, and the lengths of the time slots may be different, for example, the time slot for transmitting the shielding signal is longer than the time slot for receiving the base station signal; the time domain sampling is carried out on the signal spectrum amplitude of the shielding system, the time domain change of the signal spectrum amplitude is monitored, the signal synchronization with the shielding system can be established, the receiving frame and the transmitting frame of the shielding system are distinguished, the base station signal spectrum can be accurately obtained when the shielding system receives a base station signal, and the shielding signal spectrum can be accurately obtained when the shielding system transmits a shielding signal.
In one embodiment, the step of monitoring the time domain variations in the spectral amplitude of the signal and establishing signal synchronization with the masking system based on the time domain variations comprises the steps of:
and monitoring the falling edge of the signal spectrum amplitude, and taking the starting moment of the falling edge as the starting moment of signal synchronization.
In this embodiment, when the shielding system is in normal operation, receiving a base station signal and transmitting a shielding signal are performed alternately, and the two time slots are in a shielding period, where the length of the time slot may be different, for example, the time slot for transmitting the shielding signal is longer than the time slot for receiving the base station signal, in order to effectively achieve the purpose of shielding the base station signal, the transmitted shielding signal is greater than the base station signal, and the corresponding frequency spectrum may change, that is, the frequency spectrum amplitude in the time slot for receiving the base station signal may be smaller than the frequency spectrum amplitude in the time slot for transmitting the shielding signal, so that a falling edge may occur between the time slot for transmitting the shielding signal and the time slot for receiving the base station signal, and a rising edge may occur between the time slot for receiving the base station signal and the time slot for transmitting the shielding signal; the signal spectrum amplitude of the shielding system is subjected to time domain sampling, the falling edge of the signal spectrum amplitude is monitored, the falling edge time is used as the starting time of signal synchronization, signal synchronization with the shielding system can be realized, the receiving frame and the transmitting frame of the shielding system are distinguished, when the shielding system receives a base station signal, the base station signal spectrum can be accurately acquired, and when the shielding system transmits a shielding signal, the shielding signal spectrum can be accurately acquired.
Specifically, the start time of the falling edge of the signal spectrum amplitude may be used as the start time of the signal synchronization.
In one embodiment, the coverage frequency band of the base station signal is 450MHz-52600 MHz. The coverage frequency band comprises 2G, 3G, 4G and even 5G frequency bands, and signal shielding can be realized for frequency bands of various systems.
In one embodiment, the masking system may be a system that implements signal masking using store-and-forward.
As shown in fig. 3, the shielding system mainly comprises a transceiver antenna, a transceiver switch, a power amplifier, a low-noise amplifier module, a mixing module, an analog-to-digital conversion module (ADC), a digital-to-analog conversion module (DAC), and a Field Programmable Gate Array (FPGA).
Receiving a link: the antenna receives mobile communication wireless signals in the air, the signals are amplified through low-noise amplification and then are converted into analog intermediate-frequency signals through the frequency mixing module, the analog intermediate-frequency signals are converted into digital intermediate-frequency signals through AD sampling and then are sent to the FPGA, the DDC module in the FPGA carries out digital frequency mixing and extraction on the signals and then the digital intermediate-frequency signals are converted into low-rate digital signals of zero intermediate frequency, and then the low-rate digital signals are sent to the RAM storage unit in the FPGA to be stored.
And a sending link: signals of an RAM storage unit in the FPGA are output to a DUC module for signal interpolation and digital mixing, then are sent to a DA (digital-to-analog) module to be converted into analog intermediate frequency signals, and the analog intermediate frequency signals are converted into radio frequency signals through the mixing module, amplified by a power amplifier and transmitted in the air through an antenna.
The FPGA has the main functions of carrying out signal sampling rate conversion, signal storage and periodic transmission, receiving and storing a frame or N frames of downlink air signals by a local transceiving antenna, repeatedly transmitting the frame or N frames of signals, retransmitting for a period of time, re-receiving and storing, and retransmitting for a period. The frame time lengths of the communication systems of different standards are different, and the receiving and storing time is also changed correspondingly.
The shielding system adopts a store-and-forward mode, a local transceiving antenna receives and stores a downlink air signal of one frame or N frames, then repeatedly sends the signal of the frame or N frames, re-receives and stores the signal after retransmitting the signal for a period of time, and then performs repeated periodic operation; the retransmitted signal is frame aligned, identical in frequency, and identical in modulation technique to the normal coverage signal. Because the signals received by the receiving and transmitting antenna are basically the signals which can be received by the nearby terminal, the signals in the air of all the systems can be shielded and the method is applicable to various systems (GSM, CDMA, WCDMA, TD-SCDMA, TD-LTE and FDD-LTE).
When the shielding system is synchronized, free synchronization, GPS signal synchronization or LTE system frame signal synchronization and the like can be adopted; during signal shielding detection, the method can be consistent with the synchronization of a shielding system, namely, after field spectrum amplitude sampling (time period synchronization after triggering, and period is consistent with the period setting of a shielding device), synchronization is performed, namely, in a strong signal shielding region, a frequency spectrograph is turned on to find a shielding carrier, the frequency spectrograph performs time domain scanning, the signal spectrum amplitude of a base station under a frequency band can be obtained, an amplitude groove (namely shielding closing time (one frame duration)) can appear in a shielding period, the boundary (falling edge of the amplitude) of the groove is captured as synchronization starting time, and an FDD (frequency division duplex) system transmits in full time in frame time, so that the obtained frame length is accurate, as shown in FIG. 4; if the frame synchronization of a TDD (time division duplex) system is selected, the last falling edge is monitored, and the uplink time slot time is the beginning of a base station signal frame, wherein the falling edge exists in each frame of a TDD mode, namely the falling edge exists in a shielding signal of the system; that is, (the mark on fig. 5), the start of the downlink slot of the base station signal is defined as the start of the base station frame, which is obtained by adding the length time of the uplink slot (i.e., the time occupied by the diagonal line in fig. 5). The shielding requirement is to shield the downlink signal, only the part of the downlink time slot corresponding to the periodic time slot has the transmitted shielding signal, and the periodic time slot corresponding to the uplink time slot has no shielding signal, i.e. the shielding signal is also the same as the shielding signal of the base station corresponding to the downlink time slot and has no shielding signal corresponding to the uplink time slot.
The other is to use the same external synchronization technique as the masking system. The GPS synchronization module and the technology as the shielding system are used for obtaining GPS synchronization, so that the GPS synchronization is finally synchronized with the shielding system; or the same module and technology as the shielding device are adopted to obtain the system frame number of the LTE base station and establish the synchronization consistent with the shielding system.
The shielding (depth of intensity difference) effect detection system and the storage forwarding type shielding system run synchronously, respectively receive base station signals during the receiving period of the shielding system, receive the signals transmitted by the shielding system and the base station signals (mixture) during the transmitting period of the shielding system, and calculate the shielding depth according to the effect detection principle.
The system for detecting the shielding (depth of intensity difference) effect should be synchronous with the shielding system and operate in the same period, that is, the time slot for receiving the base station signal by the shielding system is also the time slot for receiving the base station signal by the shielding (depth of intensity difference) effect detection system, and the time slot for transmitting the shielding system corresponds to the time slot for receiving the shielding signal (plus the base station signal) by the shielding (depth of intensity difference) effect detection system.
After synchronization, correspondingly shielding a system receiving time slot, and using a detection system to receive an air signal as a base station signal frequency spectrum; in the transmission time slot of the shielding system, the detection system receives the air signal as a shielding signal (mixed base station signal) frequency spectrum.
The strength of the air radio frequency signal in the shielded area corresponding to the shielding period and the trigger synchronization process of the strength of the air radio frequency are shown in fig. 4, only the reference signal of the base station exists at the stage of receiving the signal frame, and no shielding signal exists at this time; as shown in fig. 6, when the transmit-receive switch is set to the transmit state, the level trip points of the radio frequency signals are synchronized, and the shielding starts; in the shielding emission stage, a base station signal is added with a shielding signal, and the signal intensity is higher at the moment; after 30 times of continuous transmission, only the reference signal of the base station is available at the moment, and no shielding signal exists; the above processes are circulated to realize signal shielding.
The spectrum processing can be performed according to the difference of the base station system, such as a carrier power spectrum (the carrier width is used as the RBW of the spectrum, or the RBW is lower than the carrier width and is used as the RBW, and the RBW is the lowest bandwidth difference that two signals with different frequencies can be clearly distinguished), and a spectrum contrast graph (a mask depth spectrum graph, which frequency mask depth is insufficient can be seen by subtracting the spectrum power of the base station signal from the spectrum power of the mask signal). And comparing the spectrum amplitude difference between the base station signal spectrum and the shielding signal spectrum (the shielding transmission frame time is more, and the comparison can be carried out respectively (the sequence frame number is appointed), or the average value of the transmission frame signals is taken, or the extreme value of the transmission frame is taken, etc.).
According to the shielding depth requirement (or quantization, statistical analysis is performed according to the shielding effect of the shielding depth comparison terminal) of each base station system, a shielding potential state of a full spectrum is obtained, or a data graph of data frequency (difference value of insufficient shielding) of an insufficient shielding region and the like are displayed by identification, and frequency spectrogram before and after shielding is started is shown in fig. 7 and 8.
According to the signal shielding detection method, an embodiment of the present invention further provides a signal shielding detection system, and the following describes an embodiment of the signal shielding detection system in detail.
Fig. 9 is a schematic structural diagram of a signal shielding detection system according to an embodiment. The signal mask detection system in this embodiment includes:
a first obtaining unit 210, configured to obtain a base station signal spectrum in a time slot when the shielding system receives a base station signal; the shielding system is used for generating shielding signals according to base station signals and transmitting the shielding signals;
a second obtaining unit 220, configured to obtain a frequency spectrum of the mask signal in a time slot in which the mask system transmits the mask signal; the time slot for receiving the base station signal by the shielding system and the time slot for transmitting the shielding signal by the shielding system are the time slots of the same shielding period when the shielding system works;
and a mask detecting unit 230 for detecting a mask performance of the mask system according to the base station signal spectrum and the mask signal spectrum.
In this embodiment, the masking system receives the base station signal first, generates and transmits a masking signal according to the base station signal, the masking signal can mask the base station signal from being normally received by the terminal device, the first obtaining unit 210 is in a time slot of the masking system receiving the base station signal, the spectrum of the base station signal can be obtained, the second obtaining unit 220 obtains the spectrum of the shielding signal in the time slot of the shielding system transmitting the shielding signal, the shielding detecting unit 230 can obtain the shielding (depth of intensity difference) effect performance of the shielding system to the base station signal by using the relationship between the two spectrums, the detection can be carried out when the shielding system works, the signal strength of a base station is not required to be tested when the shielding system is closed (the shielding system is not allowed to be closed in some places), therefore, the operation of the shielding system during detection is simplified, and the performance detection process of the shielding system is more convenient and faster.
In one embodiment, the time slot in which the masking system receives the base station signal and the time slot in which the masking system transmits the masking signal are time slots in a masking period of the masking system.
In one embodiment, the time slot for receiving the base station signal by the masking system and the time slot for transmitting the masking signal by the masking system are the time slots of the same masking period in one masking period by the masking system.
In one embodiment, the second obtaining unit 220 is configured to obtain a plurality of transmission frame mask signals in a time slot of the mask system for transmitting the mask signals; acquiring a shielding signal frequency spectrum according to a specified emission frame shielding signal in a plurality of emission frame shielding signals; or acquiring a shielding signal frequency spectrum according to an average value of a plurality of emission frame shielding signals; or acquiring the frequency spectrum of the shielding signal according to the extremum of the shielding signals of a plurality of transmitting frames.
In one embodiment, the mask detecting unit 230 is configured to obtain a mask depth spectrogram according to a spectrum difference between a base station signal spectrum and a mask signal spectrum; and judging the shielding performance of the shielding system according to the shielding depth frequency spectrum image.
In one embodiment, the mask detection unit 230 is configured to obtain a first power of each frequency bandwidth according to a base station signal spectrum, and obtain a second power corresponding to each frequency bandwidth according to a mask signal spectrum; and acquiring a power difference value of a corresponding frequency bandwidth according to each first power and each second power, and acquiring a shielded depth spectrum map according to the power difference value of each frequency bandwidth.
In one embodiment, the masking detection unit 230 is configured to compare a power difference corresponding to any frequency bandwidth with a reference value, and determine the masking performance of the masking system according to a comparison result of each frequency bandwidth.
In an embodiment, the shielding detection unit 230 is configured to obtain shielding situation information of a full spectrum according to the shielding depth requirement of the base station and the comparison result of each frequency bandwidth, and display the frequency data with insufficient shielding, where the frequency data with insufficient shielding includes frequency data with a power difference smaller than a reference value.
In one embodiment, as shown in fig. 10, the signal masking detection system further comprises a signal synchronization unit 240 for establishing signal synchronization with the masking system.
In one embodiment, the signal synchronization unit 240 is further configured to perform time-domain sampling on the signal spectrum amplitude of the masking system when the masking system is in operation; monitoring the time domain variation of the signal spectrum amplitude, and establishing signal synchronization with a shielding system according to the time domain variation; the time slot for shielding system operation includes the time slot for shielding system receiving base station signal and the time slot for shielding system transmitting shielding signal.
In one embodiment, the signal synchronization unit 240 is further configured to monitor a falling edge of the signal spectrum amplitude, and use the time of the falling edge as the start time of the signal synchronization.
The signal shielding detection system of the embodiment of the invention corresponds to the signal shielding detection method one by one, and the technical characteristics and the beneficial effects described in the embodiment of the signal shielding detection method are all suitable for the embodiment of the signal shielding detection system.
Referring to fig. 11, a signal masking system includes a feedback conditioning system 310, a signal masking detection system 320 as described above, and a masking system 330;
the feedback adjusting system 310 is configured to obtain frequency data with insufficient shielding according to the base station signal spectrum and the shielding signal spectrum, and feed back the frequency data to the shielding system 330; wherein the masking system adjusts the masking signal according to the frequency data.
According to the signal shielding system, the detection can be carried out when the shielding system works, and the shielding system does not need to be closed to test the signal intensity of the base station, so that the operation of the shielding system during the detection is simplified, and the performance detection process of the shielding system is more convenient and faster; moreover, the feedback adjusting system 310 can also feed back the frequency data with insufficient shielding to the shielding system 330, and the shielding system 330 adjusts the shielding signal according to the frequency data, so as to further optimize the shielding performance of the shielding system 330.
A readable storage medium having stored thereon an executable program which, when executed by a processor, performs the steps of the signal mask detection method described above.
The readable storage medium can realize that the shielding effect performance (the depth of the intensity difference) of the shielding system on the base station signal can be known by utilizing the relation between the two frequency spectrums through the stored executable program, and the detection can be carried out when the shielding system works without closing the shielding system to test the base station signal intensity (the shielding system is not allowed to be closed in some places), thereby simplifying the operation of the shielding system during the detection and enabling the performance detection process of the shielding system to be more convenient and faster.
The signal shielding detection device comprises a memory and a processor, wherein the memory stores an executable program, and the processor executes the executable program to realize the steps of the signal shielding detection method.
According to the signal shielding detection equipment, the shielding effect performance (the depth of the intensity difference) of the shielding system on the base station signal can be known by utilizing the relation between the two frequency spectrums by running the executable program on the processor, the detection can be carried out when the shielding system works, the base station signal intensity is not required to be tested when the shielding system is closed (the shielding system is not allowed to be closed in some places), the operation on the shielding system during detection is simplified, and the performance detection process of the shielding system is more convenient and faster.
It should be noted that the readable storage medium and the signal shielding detection device may be independent of the shielding system or may be integrated in the shielding system.
It will be understood by those skilled in the art that all or part of the processes for implementing the signal mask detection method according to the above embodiments may be implemented by a computer program, which is stored in a non-volatile computer-readable storage medium, and in the embodiments, the program may be stored in the storage medium of a computer system and executed by at least one processor in the computer system to implement the processes including the embodiments of the signal mask detection method according to the above embodiments. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
Those skilled in the art will appreciate that all or part of the steps in the method for implementing the above embodiments may be implemented by a program instructing the relevant hardware. The program may be stored in a readable storage medium. Which when executed comprises the steps of the method described above. The storage medium includes: ROM/RAM, magnetic disk, optical disk, etc.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (12)
1. A method of signal mask detection, comprising the steps of:
in the time slot of the shielding system for receiving the base station signal, acquiring a base station signal frequency spectrum; the shielding system is used for generating a shielding signal according to the base station signal and transmitting the shielding signal;
acquiring a shielding signal frequency spectrum in a time slot for transmitting a shielding signal by the shielding system;
detecting the shielding performance of the shielding system according to the base station signal frequency spectrum and the shielding signal frequency spectrum;
the time slot of the shielding system for receiving the base station signal and the time slot of the shielding system for transmitting the shielding signal are the time slots of the shielding system in the same shielding period in a shielding period; the receiving of the base station signal and the transmitting of the shielding signal are both performed when the shielding system is in operation.
2. The signal mask detection method of claim 1, wherein the step of obtaining the spectrum of the mask signal in the time slot in which the mask system transmits the mask signal comprises the steps of:
acquiring a plurality of emission frame shielding signals in a time slot of the shielding system for emitting the shielding signals;
acquiring a shielding signal frequency spectrum according to a specified emission frame shielding signal in the plurality of emission frame shielding signals;
or acquiring a shielding signal frequency spectrum according to the average value of the shielding signals of the plurality of emission frames;
or acquiring the frequency spectrum of the shielding signal according to the extremum of the shielding signals of the plurality of transmission frames.
3. The signal mask detection method of claim 1, wherein the step of detecting the masking performance of the masking system based on the base station signal spectrum and the masking signal spectrum comprises the steps of:
obtaining a shielding depth spectrogram according to the frequency spectrum difference between the base station signal frequency spectrum and the shielding signal frequency spectrum;
and judging the shielding performance of the shielding system according to the shielding depth frequency spectrum image.
4. The signal mask detection method of claim 3, wherein the step of obtaining a mask depth spectrogram according to the spectral difference between the base station signal spectrum and the mask signal spectrum comprises the steps of:
acquiring first power of each frequency bandwidth according to the base station signal frequency spectrum, and acquiring second power corresponding to each frequency bandwidth according to the shielding signal frequency spectrum;
and acquiring a power difference value of a corresponding frequency bandwidth according to each first power and each second power, and acquiring the shielded depth spectrogram according to the power difference value of each frequency bandwidth.
5. The signal masking detection method of claim 3, wherein the step of determining the masking performance of the masking system according to the masking depth spectrogram comprises the steps of:
and aiming at any frequency bandwidth, comparing the power difference value corresponding to the frequency bandwidth with a reference value, and judging the shielding performance of the shielding system according to the comparison result of each frequency bandwidth.
6. The signal mask detection method of claim 3, wherein the step of detecting the masking performance of the masking system based on the base station signal spectrum and the masking signal spectrum further comprises the steps of:
and acquiring shielding situation information of a full spectrum according to the shielding depth requirement of the base station and the comparison result of each frequency bandwidth, and displaying the frequency data with insufficient shielding, wherein the frequency data with insufficient shielding comprises the frequency data with a power difference value smaller than a reference value.
7. The signal shielding detection method according to claim 1, wherein before the step of obtaining the spectrum of the base station signal in the time slot in which the shielding system receives the base station signal, the method further comprises the steps of:
signal synchronization with the masking system is established.
8. The signal masking detection method of claim 7, wherein said step of establishing signal synchronization with said masking system comprises the steps of:
when the shielding system works, carrying out time domain sampling on the signal spectrum amplitude of the shielding system; the time slot of the shielding system comprises a time slot of a base station signal received by the shielding system and a time slot of a shielding signal transmitted by the shielding system;
and monitoring the time domain variation of the signal spectrum amplitude, and establishing signal synchronization with a shielding system according to the time domain variation.
9. The signal mask detection method of claim 8, wherein said step of monitoring the temporal variation of the spectral amplitude of said signal, and establishing signal synchronization with a masking system based on said temporal variation comprises the steps of:
and monitoring the falling edge of the signal spectrum amplitude, and taking the moment of the falling edge as the starting moment of signal synchronization.
10. A signal mask detection system, comprising:
the first acquisition unit is used for acquiring a base station signal frequency spectrum in a time slot of a shielding system for receiving a base station signal; the shielding system is used for generating a shielding signal according to the base station signal and transmitting the shielding signal;
a second obtaining unit, configured to obtain a frequency spectrum of a shielding signal in a time slot in which the shielding system transmits the shielding signal;
a shielding detection unit for detecting shielding performance of the shielding system according to the base station signal spectrum and the shielding signal spectrum;
the time slot of the shielding system for receiving the base station signal and the time slot of the shielding system for transmitting the shielding signal are the time slots of the shielding system in the same shielding period in a shielding period; the receiving of the base station signal and the transmitting of the shielding signal are both performed when the shielding system is in operation.
11. The signal masking detection system of claim 10, further comprising a signal synchronization unit for establishing signal synchronization with the masking system.
12. A signal masking system comprising a feedback regulation system, a signal masking detection system as claimed in claim 10 or 11 and the masking system;
the feedback adjusting system is used for acquiring frequency data with insufficient shielding according to the base station signal frequency spectrum and the shielding signal frequency spectrum and feeding the frequency data back to the shielding system; wherein the masking system adjusts the masking signal according to the frequency data.
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| PCT/CN2020/087958 WO2021027335A1 (en) | 2019-08-15 | 2020-04-30 | Signal shielding testing method and system |
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| CN110492952B (en) * | 2019-08-15 | 2022-07-08 | 浙江三维通信科技有限公司 | Signal shielding detection method and system |
| CN111147158A (en) * | 2019-12-04 | 2020-05-12 | 杭州恒生数字设备科技有限公司 | Method for shielding multi-frequency WIFI signal |
| CN111698054B (en) * | 2020-05-12 | 2023-08-04 | 南京亿杰明信息技术有限公司 | 5G mobile phone jammer based on synchronous signal coherent interference |
| CN111669249B (en) * | 2020-07-09 | 2021-02-02 | 北京中超伟业信息安全技术股份有限公司 | Cellular network electromagnetic interference method and system based on environment recognition |
| CN112511262B (en) * | 2020-11-23 | 2022-05-06 | 浙江三维通信科技有限公司 | Cooperative shielding method, shielding system, storage medium and electronic device |
| CN113132053B (en) * | 2021-04-19 | 2023-02-21 | 浙江三维通信科技有限公司 | Control system signal transmitting method and device, storage medium and electronic device |
| CN115276882B (en) * | 2022-07-18 | 2025-05-16 | 浙江三维通信科技有限公司 | Interference signal transmission method, device, storage medium and electronic device |
| CN115225170A (en) * | 2022-08-01 | 2022-10-21 | 广州市瀚云信息技术有限公司 | Method and device for testing shielding effect of shielding device |
| CN115314149B (en) * | 2022-10-08 | 2023-01-10 | 杭州恒生数字设备科技有限公司 | Method and system for adaptively shielding radio signals |
| CN117647695B (en) * | 2024-01-30 | 2024-04-16 | 深圳市思翰铭科技有限公司 | Shielding efficiency test system and method for cable connector |
| CN118101089B (en) * | 2024-04-29 | 2024-08-02 | 天津安力信通讯科技有限公司 | Mobile communication signal shielding effect evaluation method based on frequency spectrum detection |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107294639A (en) * | 2016-04-05 | 2017-10-24 | 上海无线通信研究中心 | A kind of signal of communication shielding device and its method towards LTE system |
| CN109890064A (en) * | 2019-02-11 | 2019-06-14 | 杭州乾博科技有限公司 | A kind of cdma mobile communication screen method and system based on Pilot Interference |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102739337B (en) * | 2012-06-06 | 2015-07-29 | 广州市瀚云信息技术有限公司 | A kind of time division synchronous controls cellular phone signal shielding device and screen method |
| CN105357751B (en) * | 2015-12-01 | 2018-12-04 | 浙江三维通信科技有限公司 | A kind of method and system of the more signal shielding equipment room synchronous sequences based on LTE network frame information |
| KR101881062B1 (en) * | 2016-12-29 | 2018-08-24 | 한국전자통신연구원 | Apparatus and method for preventing leaks of information |
| CN107425927A (en) * | 2017-03-30 | 2017-12-01 | 天津市德力电子仪器有限公司 | Method for rapidly detecting shielding effect of wireless signal shielding device |
| US10153830B2 (en) * | 2017-04-06 | 2018-12-11 | At&T Intellectual Propertyi, L.P. | Dynamic shielding system of cellular signals for an antenna of an unmanned aerial vehicle |
| CN109995460A (en) * | 2017-12-31 | 2019-07-09 | 中国移动通信集团湖北有限公司 | Shielder, signal shielding method, equipment and medium |
| CN109743132B (en) * | 2019-01-28 | 2022-09-30 | 福建福启网络科技有限公司 | Method for shielding mobile phone signals in whole network based on FPGA |
| CN110492952B (en) * | 2019-08-15 | 2022-07-08 | 浙江三维通信科技有限公司 | Signal shielding detection method and system |
-
2019
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-
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- 2020-04-30 WO PCT/CN2020/087958 patent/WO2021027335A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107294639A (en) * | 2016-04-05 | 2017-10-24 | 上海无线通信研究中心 | A kind of signal of communication shielding device and its method towards LTE system |
| CN109890064A (en) * | 2019-02-11 | 2019-06-14 | 杭州乾博科技有限公司 | A kind of cdma mobile communication screen method and system based on Pilot Interference |
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