Terminal signal management and control method based on satellite beam communication

Abstract

The invention relates to the field of communication, in particular to a terminal signal management and control method based on satellite beam communication, which comprises the following steps: S1, a receiving antenna receives a satellite frequency band signal sent by satellite equipment in a target area, and performs power amplification on the received satellite frequency band signal through a signal amplifier; s2, filtering out intermediate frequency signals in a specific range through filtering, and then carrying out collection and sampling processing on satellite frequency band signals; s21, reducing the frequency of an intermediate frequency signal in the satellite frequency band signal to be lower than that of an original signal through frequency mixing processing, or completely removing the carrier frequency of the intermediate frequency signal to obtain an analog baseband signal; s3, outputting a digital signal from the analog baseband signal through baseband demodulation; and S4, performing physical decoding on the digital signal, and adding an interference signal field to obtain a useless digital signal. The method has the advantages that part of frequency bands are intelligently controlled to replace or increase interference frequency bands, and meanwhile, the frequency bands which do not need to be controlled can be accurately filtered to realize effective control.

Description

[Technical field]

[0001] The present invention relates to the field of communications, and in particular to a terminal signal control method based on satellite beam communications. [Background technology]

[0002] Satellite terminals are different from ground-based mobile phone communications. Satellite terminals are also a type of radio communication equipment that uses radio waves to communicate through ground base stations. Satellite communications apply satellite communication technology to the functions of mobile phone communications, thereby enabling end users to maintain seamless interconnection around the world.

[0003] The existing signaling control technology for mobile phone signals is mature and stable, and the shielding interference technology of satellite communication technology generally has the traditional white noise coverage mode. White noise coverage requires high-power interference signal output, and the interference frequency band has drift and inaccuracy. When interfering with the satellite frequency band, it is easy to affect the frequency of the neighboring area, affecting the normal communication of other non-satellite mobile terminals in the surrounding area. In addition, it is under high-power white noise interference for a long time, and the electromagnetic radiation is large, which will also cause harm to human health.

[0004] Therefore, a terminal signal control method based on satellite beam communication is proposed. The satellite signal is received and converted into a digital signal through data analysis. The interference frequency band is accurately controlled through filtering, and some frequency bands are replaced or interference frequency bands are added to avoid affecting the signals in neighboring areas. Intelligent control can also be used to accurately filter the frequency bands that do not need to be controlled to achieve effective control. [Summary of the invention]

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a terminal signal control method based on satellite beam communication, which receives satellite signals and converts them into digital signals through data analysis, accurately controls the interference frequency band through filtering, replaces or adds interference frequency bands to some frequency bands to avoid affecting the signals in neighboring areas, and realizes intelligent control. It can also accurately filter the frequency bands that do not need to be controlled to achieve effective control.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A terminal signal control method based on satellite beam communication comprises the following steps:

[0008] S1, the receiving antenna receives the satellite frequency band signal sent by the satellite equipment in the target area, and amplifies the power of the received satellite frequency band signal through the signal amplifier;

[0009] S2, filter out the intermediate frequency signal in a specific range through filtering, and then collect and sample the satellite frequency band signal;

[0010] S21, reducing the intermediate frequency signal in the satellite frequency band signal to a frequency lower than the original signal through mixing processing, or completely removing the carrier frequency of the intermediate frequency signal to obtain an analog baseband signal;

[0011] S3, outputting a digital signal from the analog baseband signal through baseband demodulation;

[0012] S4. Obtain a useless digital signal by physically decoding the digital signal and adding an interference signal field.

[0013] Preferably, S41, adding interference clutter to the decoded digital signal, or replacing one frequency band in the digital signal;

[0014] S42: Add a co-channel interference signal to the decoded digital signal.

[0015] Preferably, S43, use an omnidirectional antenna to interfere with the signal covering the target area, form a shielding magnetic field in the target area, so that the user terminal cannot normally receive useless digital signals, thereby disconnecting the user terminal from the outside world.

[0016] Preferably, S5, a transmitter is provided on the ground to transmit useless digital signals to the target area, and the user communication terminal receives the useless digital signal from the transmitter, so that the user communication terminal cannot receive the satellite signal.

[0017] Preferably, a terminal signal control system based on satellite beam communication adopts a terminal signal control method based on satellite beam communication, the system includes a receiving module, a receiving antenna receives a satellite frequency band signal sent by a satellite device in a target area, and amplifies the power of the received satellite frequency band signal through a signal amplifier;

[0018] The filtering module filters out the intermediate frequency signal in a specific range through filtering, and then collects and samples the satellite frequency band signals;

[0019] A mixing module, which reduces the intermediate frequency signal in the satellite frequency band signal to a frequency lower than the original signal through mixing processing, or completely removes the carrier frequency of the intermediate frequency signal to obtain an analog baseband signal;

[0020] A demodulation module outputs a digital signal from an analog baseband signal through baseband demodulation;

[0021] The decoding and disassembly module obtains useless digital signals by physically decoding the digital signals and adding interference signal fields.

[0022] Preferably, a host device is further included, and the receiving antenna is arranged inside the host device.

[0023] Preferably, the host device comprises a down-converter, which reduces the intermediate frequency signal in the satellite frequency band signal from the high frequency carrier to obtain a baseband signal.

[0024] Preferably, the host device comprises an intermediate frequency filter, and the intermediate frequency filter filters the satellite frequency band signal output by the signal amplifier.

[0025] Preferably, the co-channel interference signal strength is 5-10 dB higher than the satellite signal.

[0026] Preferably, the co-channel interference signal strength is 5-10 dB lower than the satellite signal.

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

[0028] 1. The receiving antenna receives the satellite frequency band signal emitted by the satellite equipment in the target area, and amplifies the power of the received satellite frequency band signal through the signal amplifier, so that the signal amplification makes it easier to intercept and improves the integrity of the recording and interception.

[0029] 2. Through mixing processing, the intermediate frequency signal in the satellite frequency band signal is reduced to a frequency lower than the original signal. The original signal is the satellite frequency band signal originally recorded, or the intermediate frequency signal carrier frequency is completely removed to obtain the analog baseband signal, reduce the impact of the intermediate frequency signal, and reduce the probability of subsequent decoding errors. In addition, the strength of the satellite beam signal can be analyzed in real time. The satellite signal is affected by external environments such as weather, and the intensity changes in real time. When the satellite signal is enhanced, the interference signal can be analyzed in real time and enhanced with the same intensity to ensure the shielding of the satellite frequency band signaling. When the satellite signal is weakened, the output power is also reduced to avoid power waste and reduce energy consumption.

[0030] 3. Add interference noise to the decoded digital signal, such as adding interference noise to the front end of the signal, adding interference noise to the middle end of the signal, adding interference noise to the back end of the signal, or replacing one of the frequency bands in the digital signal to increase information anti-theft security and prevent security information leakage caused by decryption. In addition, precise filtering methods can be used to effectively control frequency bands and terminals that do not need to be controlled.

[0031] A co-frequency interference signal is added to the decoded digital signal. The co-frequency interference signal intercepts the signal as a whole to prevent eavesdropping and improve information security.

[0032] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings.

Brief Description of the Drawings

[0033] The present invention will be further described below in conjunction with the accompanying drawings:

[0034] Figure 1 It is a schematic diagram of the communication principle;

[0035] Figure 2 This is a schematic diagram of satellite communication interception;

[0036] Figure 3 It is a schematic diagram of some signals;

[0037] Figure 4 It is a filtering schematic diagram;

[0038] Figure 5 This is a schematic diagram of filter extraction;

[0039] Figure 6 To modify the field diagram;

[0040] Figure 7 This is a schematic diagram of the frequency band after modification;

[0041] Figure 8 This is a schematic diagram of signal frequency band reorganization;

[0042] Fig. 9 This is a schematic diagram of signal coverage;

[0043] Fig.10 Schematic diagram of the co-frequency interference signal strength. [Specific implementation method]

[0044] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0045] The following first describes the concepts involved in this application in conjunction with the accompanying drawings. It should be noted that the following description of each concept is only to make the content of this application easier to understand and does not limit the scope of protection of this application.

[0046] Embodiment 1:

[0047] The integration of satellite communication and ground mobile communication is an irresistible trend. At present, some models of mobile phone terminals have satellite communication functions. Due to the gradual maturity and improvement of the current technologies such as security control and signal shielding for mobile phone signals, there is no effective control technology for the security control of signals in satellite and other special network frequency bands. As a result, there are great satellite signal security risks in special places during special periods. Special places are not limited to confidential parks, military camps, armed police camps, judicial prisons, special detention points under public security supervision, important examination entrance areas, etc. Once special areas of special industries transmit important information to the outside through satellite frequency band signals, it will bring huge communication security risks to security control work.

[0048] Satellite communication uses artificial satellites as relay stations to forward radio waves. The satellite communication system consists of two parts: the space part - the communication satellite and the ground part - the communication ground station. A communication satellite is actually a communication relay station suspended in the air. It is high above the ground with a wide field of vision. As long as it is within its coverage area, wireless communication can be carried out regardless of the distance.

[0049] A satellite phone is a communication device that uses satellite frequency band communication technology to transmit voice, text messages, and data. It is the main practical product of satellite communications. It connects with ground stations and communication satellites to transmit voice, text messages, and data to anywhere on the earth.

[0050] like Figure 1 As shown in the figure, the basic working principle of communication satellite is: a radio signal is sent from the ground station. After the weak signal is received by the satellite communication intelligent antenna, it is first amplified, frequency-converted and power-amplified in the communication repeater. Finally, the satellite's communication antenna re-sends the amplified radio wave to another ground station receiving end, thereby realizing long-distance communication among multiple ground stations or user ends.

[0051] It combines the advantages of microwave communication and aerospace technology, and has many advantages such as long communication distance, wide coverage, large communication capacity, good call quality, and flexibility.

[0052] A terminal signal control method based on satellite beam communication includes the following steps: Figure 2 As shown:

[0053] S1. The receiving antenna receives the satellite frequency band signal sent by the satellite equipment in the target area, and amplifies the power of the received satellite frequency band signal through the signal amplifier, so that the amplified signal is easier to intercept and the integrity of the recording and interception is improved.

[0054] S2, filter out the intermediate frequency signal in a specific range through filtering, and then collect and sample the satellite frequency band signal;

[0055] S21. Through mixing processing, the intermediate frequency signal in the satellite frequency band signal is reduced to a frequency lower than the original signal. The original signal is the satellite frequency band signal originally recorded, or the intermediate frequency signal carrier frequency is completely removed to obtain the analog baseband signal, reduce the impact of the intermediate frequency signal, and reduce the probability of subsequent decoding errors. In addition, the strength of the satellite beam signal can be analyzed in real time. The satellite signal is affected by external environments such as weather, and the intensity changes in real time. When the satellite signal is enhanced, the interference signal can be analyzed in real time and enhanced with the same intensity to ensure the shielding of the satellite frequency band signaling. When the satellite signal is weakened, the output power is also reduced to avoid power waste and reduce energy consumption.

[0056] S3, outputting a digital signal from the analog baseband signal through baseband demodulation;

[0057] S4. Obtain a useless digital signal by physically decoding the digital signal and adding an interference signal field.

[0058] S41, adding interference noise to the decoded digital signal, such as adding interference noise to the front end of the signal, adding interference noise to the middle end of the signal, adding interference noise to the back end of the signal, or Figures 3 to 8 As shown, by replacing one of the frequency bands in the digital signal, the security of information theft is increased, and the leakage of security information caused by decryption is prevented. In addition, precise filtering methods can be used to effectively control the frequency bands and terminals that do not need to be controlled.

[0059] S42. Add a co-frequency interference signal to the decoded digital signal. The co-frequency interference signal intercepts the signal as a whole to prevent eavesdropping and improve information security.

[0060] S43. Use an omnidirectional antenna to interfere with the signal in the target area, and form a shielding magnetic field in the target area, so that the user terminal cannot normally receive useless digital signals, thereby disconnecting the user terminal from the outside world.

[0061] S5. A transmitter is set up on the ground to transmit useless digital signals to the target area. The user communication terminal receives the useless digital signals from the transmitter, making it impossible for the user communication terminal to receive satellite signals. An omnidirectional antenna is used to release the interference signal to cover the target area. The satellite terminal forms a shielding magnetic field around the area covered by the interference signal, making it impossible for the satellite terminal to receive the synchronization signal normally. The received signal is a co-frequency interference signal or interference clutter, that is, it is impossible to correctly demodulate the networkable signal or steal information, thereby disconnecting the mobile satellite terminal from the outside world and forming a signal shielding magnetic field around the satellite terminal.

[0062] A terminal signal control system based on satellite beam communication adopts a terminal signal control method based on satellite beam communication. The system includes a receiving module, a receiving antenna receives a satellite frequency band signal sent by a satellite device in a target area, and amplifies the power of the received satellite frequency band signal through a signal amplifier;

[0063] The filtering module filters out the intermediate frequency signal in a specific range through filtering, and then collects and samples the satellite frequency band signals;

[0064] A mixing module, which reduces the intermediate frequency signal in the satellite frequency band signal to a frequency lower than the original signal through mixing processing, or completely removes the carrier frequency of the intermediate frequency signal to obtain an analog baseband signal;

[0065] A demodulation module outputs a digital signal from an analog baseband signal through baseband demodulation;

[0066] The decoding and disassembly module obtains useless digital signals by physically decoding the digital signals and adding interference signal fields.

[0067] The invention also includes a host device, wherein the receiving antenna is arranged inside the host device.

[0068] The host device includes a downconverter, which reduces the intermediate frequency signal in the satellite frequency band signal from the high frequency carrier to obtain a baseband signal.

[0069] The host device includes an intermediate frequency filter, which filters the satellite frequency band signal output by the signal amplifier.

[0070] like Figures 9 and 10 As shown, the co-channel interference signal strength is 5-10dB lower than the satellite signal.

[0071] Embodiment 2:

[0072] The difference between this embodiment and the first embodiment is that the co-channel interference signal strength is 5-10 dB higher than the satellite signal.

[0073] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A terminal signal control method based on satellite beam communication, characterized in that: The following steps are involved: S1, the receiving antenna receives the satellite frequency band signal sent by the satellite equipment in the target area, and amplifies the power of the received satellite frequency band signal through the signal amplifier; S2, filter out the intermediate frequency signal in a specific range through filtering, and then collect and sample the satellite frequency band signal; S21, reducing the intermediate frequency signal in the satellite frequency band signal to a frequency lower than the original signal through mixing processing, or completely removing the carrier frequency of the intermediate frequency signal to obtain an analog baseband signal; S3, outputting a digital signal from the analog baseband signal through baseband demodulation; S4. Obtain a useless digital signal by physically decoding the digital signal and adding an interference signal field.

2. A terminal signal control method based on satellite beam communication according to claim 1, characterized in that: S41, adding interference clutter to the decoded digital signal, or replacing one frequency band in the digital signal; S42: Add a co-frequency interference signal to the decoded digital signal.

3. A terminal signal control method based on satellite beam communication as claimed in claim 2, characterized in that: S43. Use an omnidirectional antenna to interfere with the signal in the target area, and form a shielding magnetic field in the target area, so that the user terminal cannot normally receive useless digital signals, thereby disconnecting the user terminal from the outside world.

4. A terminal signal control method based on satellite beam communication according to any one of claims 1 to 3, characterized in that: S5. A transmitter is provided on the ground to transmit useless digital signals to the target area. The user communication terminal receives the useless digital signal from the transmitter, so that the user communication terminal cannot receive the satellite signal.

5. A terminal signal control system based on satellite beam communication, the system is a terminal signal control method based on satellite beam communication, characterized in that: The system includes a receiving module, a receiving antenna receives satellite frequency band signals sent by satellite equipment in the target area, and amplifies the power of the received satellite frequency band signals through a signal amplifier; The filtering module filters out the intermediate frequency signal in a specific range through filtering, and then collects and samples the satellite frequency band signals; A mixing module, which reduces the intermediate frequency signal in the satellite frequency band signal to a frequency lower than the original signal through mixing processing, or completely removes the carrier frequency of the intermediate frequency signal to obtain an analog baseband signal; A demodulation module outputs a digital signal from an analog baseband signal through baseband demodulation; The decoding and disassembly module obtains useless digital signals by physically decoding the digital signals and adding interference signal fields.

6. A terminal signal control method based on satellite beam communication as claimed in claim 1, characterized in that: The device also includes a host device, wherein the receiving antenna is arranged inside the host device.

7. A terminal signal control method based on satellite beam communication as claimed in claim 6, characterized in that: The host device includes a down-converter, which reduces the intermediate frequency signal in the satellite frequency band signal from the high frequency carrier to obtain a baseband signal.

8. A terminal signal control method based on satellite beam communication as claimed in claim 6, characterized in that: The host device comprises an intermediate frequency filter, and the intermediate frequency filter filters the satellite frequency band signal output by the signal amplifier.

9. The terminal signal control method based on satellite beam communication according to claim 1, characterized in that: The co-channel interference signal strength is 5-10 dB higher than the satellite signal.

10. A terminal signal control method based on satellite beam communication according to claim 1, characterized in that: The co-channel interference signal strength is 5-10 dB lower than the satellite signal.

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