CN116683939A - High-reliability anti-interference broadband data transmission system of space-earth cooperative satellite - Google Patents
High-reliability anti-interference broadband data transmission system of space-earth cooperative satellite Download PDFInfo
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- CN116683939A CN116683939A CN202310697317.4A CN202310697317A CN116683939A CN 116683939 A CN116683939 A CN 116683939A CN 202310697317 A CN202310697317 A CN 202310697317A CN 116683939 A CN116683939 A CN 116683939A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
- H04B1/715—Interference-related aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18519—Operations control, administration or maintenance
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
- H04B1/715—Interference-related aspects
- H04B2001/7154—Interference-related aspects with means for preventing interference
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- 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 discloses a high-reliability anti-interference broadband data transmission system of a space-earth cooperative satellite, belonging to the technical field of information transmission; the method relates to the technologies of ultrahigh variable spread spectrum ratio signal generation, frequency hopping, intelligent interference identification, interference damage prediction, variable code modulation and the like. The invention distinguishes the interference signal types through the interference intelligent recognition technology, realizes the high-reliability interaction of the interference information through the ultra-high variable spread spectrum ratio spread spectrum technology of the space-earth cooperation, and realizes the reliable transmission of the broadband data by cooperatively selecting the optimal interference avoidance method aiming at different interference types and interference damage prediction conditions.
Description
Technical Field
The invention relates to the technical field of information transmission, in particular to a high-reliability anti-interference broadband data transmission system of a space-earth cooperative satellite.
Background
The satellite broadband communication system is gradually applied in a large scale under the promotion of the demands of high-definition television, high-speed internet access and the like. For a satellite broadband communication system, spectrum resource allocation mainly comprises two modes of pre-planning and on-demand application, wherein the two modes of allocation are to assign working frequency points, bandwidths and time slots for users to use. When the spectrum used by the user is disturbed maliciously or not with sufficient intensity, the data transmission is interrupted and difficult to recover.
At present, aiming at the problem that the frequency spectrum of a user is interfered, the system mainly determines the interference condition in a manual identification mode, and resumes data transmission by reallocating new resources to the user to avoid interference. Under the working mode, the system has the problems that the interference is difficult to discover in time, the communication recovery time is long, the time-varying interference cannot be resisted, and the like.
Disclosure of Invention
The invention aims to provide a high-reliability anti-interference broadband data transmission system of a space-earth cooperative satellite. The method and the device enable the user signal to automatically avoid interference, acquire full-band frequency spectrum information through a broadband signal receiving module on a satellite, track interference signal changes in real time by utilizing an interference intelligent identification and interference damage prediction module, acquire interference patterns, parameters and time-varying models, and finally determine broadband signal frequency points, bandwidths, modulation and coding modes and whether to start frequency hopping output by ground equipment by an anti-interference measure decision module. The decision information is transmitted through the ultra-high spread spectrum ratio signal, so that various unsaturated interference attacks can be resisted, and the decision information is ensured to be correctly transmitted. And the frequency hopping parameter control and modulation coding parameter control module is used for automatically adjusting the parameters of the transmitting signal according to the decision information so as to avoid interference.
The aim of the invention is achieved by the following technical scheme:
a high-reliability anti-interference broadband data transmission system of a space-earth cooperative satellite comprises a broadband signal receiving module, an interference intelligent identification module, an interference damage prediction module, an anti-interference measure decision module, an ultra-high spread spectrum ratio signal generation module and ground equipment on satellite equipment;
the broadband signal receiving module has full-band signal acquisition and processing capability, extracts and processes legal broadband signals, realizes high-speed data transmission between satellites and the ground, or transmits preprocessed data to the interference intelligent recognition module;
the interference intelligent recognition module can find abnormal signals on the basis of automatically eliminating legal signals; for a fixed interference signal, acquiring interference signal frequency, bandwidth and amplitude information; continuously tracking the characteristic change of the time-varying interference signal, and acquiring the time-varying rule of the interference signal through autonomous learning;
the interference damage prediction module is used for judging whether the interference signal can influence the legal signal according to the characteristic parameters of the interference and the legal signal;
the anti-interference measure decision module selects anti-interference measures including frequency hopping avoidance, modulation and coding mode change and speed reduction according to the information of the intelligent interference identification module and the result of the interference damage prediction module, and provides corresponding configuration parameters for ground equipment;
in the broadband signal receiving process, the interference intelligent recognition module locates and extracts relevant parameters of interference signals and completes interference classification through uninterrupted spectrum scanning of the preprocessed data; aiming at a time-varying interference signal, an interference intelligent recognition module obtains a time-varying rule of the interference signal through model comparison and autonomous learning;
the interference damage prediction module compares the characteristic parameters of the interference signals with the legal signal parameters of the data sent by the broadband signal receiving module, and evaluates the damage degree of the interference signals to the legal signals through the interference parameters of the interference intelligent identification module in a plurality of dimensions including frequency overlapping, power influence and time-varying influence; the anti-interference measure decision module decides whether to take anti-interference measures according to the result of interference damage prediction, and after deciding to take the anti-interference measures, the anti-interference measure decision module generates corresponding configuration parameters according to the pre-implanted frequency, speed, modulation code and frequency hopping interference avoidance strategy, the interference parameters of the interference intelligent identification module and the legal signal parameters of the broadband signal receiving module, and forms a control signal frame; after the control signal frame enters the ultra-high spread spectrum ratio signal generating module, performing exclusive OR operation with a synchronous spread spectrum sequence and an information spread spectrum sequence to generate an ultra-high spread spectrum ratio signal, wherein the synchronous spread spectrum sequence is used for distinguishing different station addresses, and the information spread spectrum sequence is used for providing an ultra-long spread spectrum code; after the ground equipment completes spread spectrum reception, control parameters are sent to a modulator, legal signals are controlled to slow down or modulation codes are changed to improve the anti-interference capability of the signals, or frequency point changes are controlled to avoid interference, or frequency hopping is carried out to avoid time-varying interference.
Further, the full-band bandwidth of the broadband satellite signal is 1.6GHz, and the legal signal bandwidth is 300MHz at the maximum; the broadband signal receiving module is used for realizing sampling processing of the 1.6GHz broadband signal, and transmitting sampling data to the interference intelligent identification module after extracting legal signals.
Further, the interference damage prediction module is automatically matched with the simulation model library according to the interference type, the characteristics and the parameters, and the influence degree of the interference signal on the legal signal is estimated.
Further, the anti-interference decision module decides whether to adopt anti-interference measures and what anti-interference measures are adopted for broadband signals sent by the ground equipment according to the result of interference damage prediction and the interference parameters of interference intelligent identification, and generates corresponding anti-interference parameters.
Furthermore, the ground equipment is provided with a spread spectrum signal receiving module, a frequency hopping parameter control module and a modulation coding parameter control module, according to configuration parameters, aiming interference and frequency sweep interference can be avoided in a frequency hopping mode, and the anti-interference capability of a broadband signal is improved and broadband power interference is resisted by changing the modulation coding mode and the rate.
Compared with the prior art, the invention has the advantages that:
1. the invention realizes the intelligent identification of the interference signal characteristics, can track the time-varying interference signal, and acquires the time-varying rule of the interference signal through autonomous learning.
2. According to the method, the influence of interference on the synthetic signal can be estimated through interference damage prediction, avoidance measures are not taken on the interference signal with low damage, and the stability of the system is improved.
3. Aiming at the time-varying interference signals, the method controls legal signals to carry out frequency hopping to avoid interference according to the time-varying rule.
4. In the invention, the transmission of the inter-satellite configuration parameters is protected by adopting the ultra-high frequency spread spectrum ratio of 1-10 ten thousand hops, and the interference is resisted by the spread spectrum gain of 50dB at most, so that the reliability of the system is improved.
Drawings
Fig. 1 is a block diagram of a data transmission implementation of an embodiment of the present invention.
Fig. 2 is a diagram of an interference intelligent recognition module according to an embodiment of the present invention.
Fig. 3 is a block diagram of interference damage prediction according to an embodiment of the present invention.
FIG. 4 is a block diagram of an anti-tamper measure decision module according to an embodiment of the present invention.
Fig. 5 is a block diagram of ultra-high spread spectrum signal generation according to an embodiment of the present invention.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples.
A high-reliability anti-interference broadband data transmission system of a space-earth cooperative satellite comprises a broadband signal receiving module, an interference intelligent identification module, an interference damage prediction module, an anti-interference measure decision module, an ultra-high spread spectrum ratio signal generation module and ground equipment on satellite equipment;
the broadband signal receiving module has full-band signal acquisition and processing capability, extracts and processes legal broadband signals, realizes high-speed data transmission between satellites and the ground, or transmits preprocessed data to the interference intelligent recognition module;
the interference intelligent recognition module can find abnormal signals on the basis of automatically eliminating legal signals; for a fixed interference signal, acquiring interference signal frequency, bandwidth and amplitude information; continuously tracking the characteristic change of the time-varying interference signal, and acquiring the time-varying rule of the interference signal through autonomous learning;
the interference damage prediction module is used for judging whether the interference signal can influence the legal signal according to the characteristic parameters of the interference and the legal signal;
the anti-interference measure decision module selects anti-interference measures including frequency hopping avoidance, modulation and coding mode change and speed reduction according to the information of the intelligent interference identification module and the result of the interference damage prediction module, and provides corresponding configuration parameters for ground equipment;
in the broadband signal receiving process, the interference intelligent recognition module locates and extracts relevant parameters of interference signals and completes interference classification through uninterrupted spectrum scanning of the preprocessed data; aiming at a time-varying interference signal, an interference intelligent recognition module obtains a time-varying rule of the interference signal through model comparison and autonomous learning;
the interference damage prediction module compares the characteristic parameters of the interference signals with the legal signal parameters of the data sent by the broadband signal receiving module, and evaluates the damage degree of the interference signals to the legal signals through the interference parameters of the interference intelligent identification module in a plurality of dimensions including frequency overlapping, power influence and time-varying influence; the anti-interference measure decision module decides whether to take anti-interference measures according to the result of interference damage prediction, and after deciding to take the anti-interference measures, the anti-interference measure decision module generates corresponding configuration parameters according to the pre-implanted frequency, speed, modulation code and frequency hopping interference avoidance strategy, the interference parameters of the interference intelligent identification module and the legal signal parameters of the broadband signal receiving module, and forms a control signal frame; after the control signal frame enters the ultra-high spread spectrum ratio signal generating module, performing exclusive OR operation with a synchronous spread spectrum sequence and an information spread spectrum sequence to generate an ultra-high spread spectrum ratio signal, wherein the synchronous spread spectrum sequence is used for distinguishing different station addresses, and the information spread spectrum sequence is used for providing an ultra-long spread spectrum code; after the ground equipment completes spread spectrum reception, control parameters are sent to a modulator, legal signals are controlled to slow down or modulation codes are changed to improve the anti-interference capability of the signals, or frequency point changes are controlled to avoid interference, or frequency hopping is carried out to avoid time-varying interference.
Further, the full-band bandwidth of the broadband satellite signal is 1.6GHz, and the legal signal bandwidth is 300MHz at the maximum; the broadband signal receiving module is used for realizing sampling processing of the 1.6GHz broadband signal, and transmitting sampling data to the interference intelligent identification module after extracting legal signals.
Further, the interference damage prediction module is automatically matched with the simulation model library according to the interference type, the characteristics and the parameters, and the influence degree of the interference signal on the legal signal is estimated.
Further, the anti-interference decision module decides whether to adopt anti-interference measures and what anti-interference measures are adopted for broadband signals sent by the ground equipment according to the result of interference damage prediction and the interference parameters of interference intelligent identification, and generates corresponding anti-interference parameters.
Furthermore, the ground equipment is provided with a spread spectrum signal receiving module, a frequency hopping parameter control module and a modulation coding parameter control module, according to configuration parameters, aiming interference and frequency sweep interference can be avoided in a frequency hopping mode, and the anti-interference capability of a broadband signal is improved and broadband power interference is resisted by changing the modulation coding mode and the rate.
The following is a more specific description:
the broadband signal receiving module adopts high-speed A/D to sample the full-band signal, and the acquired full-band signal sampling data is transmitted to the interference intelligent recognition module after preprocessing and segmenting while legal signals are received.
The intelligent interference recognition module scans the segmented signals, and starts real-time processing after finding abnormal signals and estimating basic parameters. For a fixed interference signal, obtaining the frequency, bandwidth and amplitude information of the interference signal through FFT; and tracking the characteristic change of the time-varying interference signal by combining the time-varying interference signal scanning with the real-time processing, and acquiring the time-varying rule of the interference signal through autonomous learning.
The interference damage prediction module judges whether the interference signal has influence on the legal signal according to the characteristic parameters of the interference and the legal signal, and judges the damage degree of the influence on the legal signal.
The anti-interference measure decision module carries out automatic decision according to the results of intelligent interference identification and interference damage prediction, and can avoid the interference signal with low damage or improve the anti-interference capability of legal signals by changing modulation codes and speed reduction; for a fixed interference signal with high damage, a new frequency point can be automatically allocated to avoid the interference signal; for time-varying interference signals with high damage, according to the parameter time-varying rule, starting the frequency hopping function of legal signals to avoid interference.
The configuration parameters generated by the anti-interference measure decision part protect the transmission signals through 1-10 thousands of ultra-high spread spectrum ratios, provide the maximum 50dB spread spectrum gain anti-interference, and ensure that the configuration parameters can be correctly issued to ground equipment.
The ground equipment controls parameters such as frequency hopping, modulation coding, transmission rate and the like of the broadband signal according to the received configuration parameters, so as to achieve the purpose of avoiding interference.
In the embodiment, the time-varying characteristics of the full-band channel are monitored while the broadband signal is received, and once the interference signal is found to influence the legal broadband signal quality, the legal signal is controlled to be effectively avoided by adopting methods of changing frequency points, reducing speed and changing modulation codes or frequency hopping. See fig. 1.
The parameters of the legal control signals are protected and transmitted in a superhigh spread spectrum ratio mode, the maximum 50dB spread spectrum gain can be provided for resisting interference, and the correct transmission of the control parameters is ensured. See fig. 1.
According to the invention, the interference intelligent identification module locates and extracts relevant parameters of interference signals through uninterrupted frequency spectrum scanning, and interference classification is completed. Aiming at the time-varying interference signals, the interference intelligent recognition module obtains the time-varying rule of the interference signals through model comparison and autonomous learning. See fig. 2.
The interference damage prediction module evaluates the damage degree of the interference signal to the legal signal in a plurality of dimensions such as frequency overlapping, power influence, time-varying influence and the like by comparing the characteristic parameters of the interference signal with the legal signal parameters. See fig. 3.
The anti-interference measure decision module decides whether to take anti-interference measures or not according to the result of interference damage prediction. After the anti-interference measures are determined, an anti-interference measure decision module generates corresponding configuration parameters according to pre-implanted frequency, speed, modulation code, frequency hopping and other interference avoidance strategies, and forms a control signal frame. See fig. 4.
After the control signal frame enters the ultra-high spread spectrum ratio signal generating module, exclusive OR operation is carried out on the control signal frame and the synchronous spread spectrum sequence and the information spread spectrum sequence, so as to generate the ultra-high spread spectrum ratio signal, wherein the synchronous spread spectrum sequence is used for distinguishing different station addresses, and the information spread spectrum sequence is used for providing ultra-long spread spectrum codes. See fig. 5.
After the ground equipment completes spread spectrum reception, control parameters are sent to a modulator, legal signals are controlled to slow down or modulation codes are changed to improve the anti-interference capability of the signals, or frequency point changes are controlled to avoid interference, or frequency hopping is carried out to avoid time-varying interference. See fig. 1.
What is not described in detail in this embodiment is what is known in the art.
The above description is only one embodiment of the present invention, but the scope of the present invention is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art according to the technical scheme and the inventive concept of the present invention should be included in the scope of the present invention.
Claims (5)
1. The high-reliability anti-interference broadband data transmission system of the space-earth cooperative satellite is characterized by comprising a broadband signal receiving module, an interference intelligent identification module, an interference damage prediction module, an anti-interference measure decision module, an ultra-high spread spectrum ratio signal generation module and ground equipment on satellite equipment;
the broadband signal receiving module has full-band signal acquisition and processing capability, extracts and processes legal broadband signals, realizes high-speed data transmission between satellites and the ground, or transmits preprocessed data to the interference intelligent recognition module;
the interference intelligent recognition module can find abnormal signals on the basis of automatically eliminating legal signals; for a fixed interference signal, acquiring interference signal frequency, bandwidth and amplitude information; continuously tracking the characteristic change of the time-varying interference signal, and acquiring the time-varying rule of the interference signal through autonomous learning;
the interference damage prediction module is used for judging whether the interference signal can influence the legal signal according to the characteristic parameters of the interference and the legal signal;
the anti-interference measure decision module selects anti-interference measures including frequency hopping avoidance, modulation and coding mode change and speed reduction according to the information of the intelligent interference identification module and the result of the interference damage prediction module, and provides corresponding configuration parameters for ground equipment;
in the broadband signal receiving process, the interference intelligent recognition module locates and extracts relevant parameters of interference signals and completes interference classification through uninterrupted spectrum scanning of the preprocessed data; aiming at a time-varying interference signal, an interference intelligent recognition module obtains a time-varying rule of the interference signal through model comparison and autonomous learning;
the interference damage prediction module compares the characteristic parameters of the interference signals with the legal signal parameters of the data sent by the broadband signal receiving module, and evaluates the damage degree of the interference signals to the legal signals through the interference parameters of the interference intelligent identification module in a plurality of dimensions including frequency overlapping, power influence and time-varying influence; the anti-interference measure decision module decides whether to take anti-interference measures according to the result of interference damage prediction, and after deciding to take the anti-interference measures, the anti-interference measure decision module generates corresponding configuration parameters according to the pre-implanted frequency, speed, modulation code and frequency hopping interference avoidance strategy, the interference parameters of the interference intelligent identification module and the legal signal parameters of the broadband signal receiving module, and forms a control signal frame; after the control signal frame enters the ultra-high spread spectrum ratio signal generating module, performing exclusive OR operation with a synchronous spread spectrum sequence and an information spread spectrum sequence to generate an ultra-high spread spectrum ratio signal, wherein the synchronous spread spectrum sequence is used for distinguishing different station addresses, and the information spread spectrum sequence is used for providing an ultra-long spread spectrum code; after the ground equipment completes spread spectrum reception, control parameters are sent to a modulator, legal signals are controlled to slow down or modulation codes are changed to improve the anti-interference capability of the signals, or frequency point changes are controlled to avoid interference, or frequency hopping is carried out to avoid time-varying interference.
2. The high-reliability anti-interference broadband data transmission system of the heaven-earth cooperative satellite according to claim 1, wherein the full-band bandwidth of the broadband satellite signal is 1.6GHz, and the legal signal bandwidth is 300MHz at the most; the broadband signal receiving module is used for realizing sampling processing of the 1.6GHz broadband signal, and transmitting sampling data to the interference intelligent identification module after extracting legal signals.
3. The high-reliability anti-interference broadband data transmission system of the space-earth cooperative satellite according to claim 1, wherein the interference damage prediction module is automatically matched with a simulation model library according to interference types, characteristics and parameters to evaluate the influence degree of interference signals on legal signals.
4. The high-reliability anti-interference broadband data transmission system of the space-earth cooperative satellite according to claim 1, wherein the anti-interference decision module decides whether and what anti-interference measures are adopted for broadband signals sent by the ground equipment according to the result of interference damage prediction and interference parameters of interference intelligent identification, and generates corresponding anti-interference parameters.
5. The high-reliability anti-interference broadband data transmission system of the space-earth cooperative satellite according to claim 1, wherein the ground equipment is provided with a spread spectrum signal receiving module, a frequency hopping parameter control module and a modulation coding parameter control module, aiming interference and sweep interference can be avoided in a frequency hopping mode according to configuration parameters, and the anti-interference capability of a broadband signal is improved and broadband power interference is resisted by changing modulation coding modes and rates.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116886124A (en) * | 2023-09-05 | 2023-10-13 | 成都九华圆通科技发展有限公司 | Frequency hopping signal tracking and suppressing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116886124A (en) * | 2023-09-05 | 2023-10-13 | 成都九华圆通科技发展有限公司 | Frequency hopping signal tracking and suppressing method |
| CN116886124B (en) * | 2023-09-05 | 2023-11-14 | 成都九华圆通科技发展有限公司 | Frequency hopping signal tracking and suppressing method |
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