A high-reliability, anti-interference, broadband data transmission system for space-ground collaborative satellites

Abstract

The present invention discloses a high-reliability, anti-interference broadband data transmission system for space-ground collaborative satellites, belonging to the field of information transmission technology. The system involves technologies such as ultra-high variable spreading ratio signal generation, frequency hopping, intelligent interference identification, interference damage prediction, and variable coding modulation. The system uses intelligent interference identification technology to distinguish interference signal types, and achieves highly reliable interaction of interference information through space-ground collaborative ultra-high variable spreading ratio spread spectrum technology. The system collaboratively selects the optimal interference avoidance method for different interference types and interference damage prediction scenarios, thereby achieving reliable broadband data transmission.

Description

Technical Field

[0001] The present invention relates to the field of information transmission technology, and in particular to a high-reliability, anti-interference, broadband data transmission system for a space-ground collaborative satellite. Background Art

[0002] Driven by demand for high-definition television and high-speed internet access, satellite broadband communication systems are gaining widespread adoption. Spectrum resource allocation for satellite broadband communication systems primarily involves pre-planning and on-demand applications. Both methods assign operating frequencies, bandwidths, and time slots to users. If the spectrum used by a user is subject to sufficiently strong interference, whether malicious or non-malicious, data transmission is interrupted and difficult to recover.

[0003] Currently, systems primarily rely on manual identification to address spectrum interference, reassigning new resources to users to mitigate interference and restore data transmission. This approach can lead to difficulties in detecting interference, long communication recovery times, and inability to combat time-varying interference. Summary of the Invention

[0004] The present invention aims to provide a highly reliable, anti-interference broadband data transmission system for space-ground collaborative satellites. This system enables user signals to automatically avoid interference. The satellite's broadband signal receiving module acquires full-band spectrum information. Intelligent interference identification and interference damage prediction modules track interference signal changes in real time, capturing interference patterns, parameters, and time-varying models. Ultimately, an anti-interference decision module determines the broadband signal frequency, bandwidth, modulation, and coding schemes output by ground equipment, as well as whether to enable frequency hopping. This decision information is transmitted via an ultra-high spread spectrum ratio signal, capable of resisting various non-saturation interference attacks and ensuring accurate communication. Frequency hopping parameter control and modulation and coding parameter control modules automatically adjust transmit signal parameters based on this decision information to avoid interference.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A high-reliability, anti-interference, broadband data transmission system for a space-ground collaborative satellite includes a broadband signal receiving module, an intelligent interference recognition module, an interference damage prediction module, an anti-interference measure decision module, and an ultra-high spreading ratio signal generation module on satellite equipment, as well as ground equipment;

[0007] The broadband signal receiving module has the ability to collect and process full-band signals, extracting and processing legitimate broadband signals to achieve high-speed data transmission between satellites and the ground, or transmitting pre-processed data to the interference intelligent identification module;

[0008] The intelligent interference recognition module can find abnormal signals by automatically excluding legitimate signals. For fixed interference signals, it can obtain information about the frequency, bandwidth, and amplitude of the interference signal. For time-varying interference signals, it can continuously track their characteristic changes and obtain the time-varying patterns of the interference signal through autonomous learning.

[0009] The interference damage prediction module is used to determine whether the interference signal will affect the legitimate signal based on the characteristic parameters of the interference and legitimate signals;

[0010] The anti-interference measure decision module selects anti-interference measures including frequency hopping avoidance, no avoidance, changing modulation and coding methods, and speed reduction based on the information from the interference intelligent identification module and the results of the interference damage prediction module, and provides corresponding configuration parameters for the ground equipment;

[0011] During broadband signal reception, the intelligent interference recognition module continuously scans the spectrum of pre-processed data to locate and extract relevant parameters of the interference signal and complete interference classification. For time-varying interference signals, the intelligent interference recognition module obtains the time-varying patterns of the interference signal through model comparison and autonomous learning.

[0012] The interference damage prediction module compares the interference signal characteristic parameters with the legitimate signal parameters in the data sent by the broadband signal receiving module. It uses the interference parameters of the interference intelligent identification module to assess the degree of damage to the legitimate signal from the interference signal in multiple dimensions, including frequency overlap, power impact, and time-varying effects. The anti-interference measure decision module decides whether to take anti-interference measures based on the interference damage prediction results. After deciding to take anti-interference measures, the anti-interference measure decision module generates corresponding configuration parameters based on the pre-implanted frequency, rate, modulation code, and frequency hopping interference avoidance strategy, as well as the interference parameters of the interference intelligent identification module and the legitimate signal parameters of the broadband signal receiving module. These parameters are then composed into a control signal frame. After the control signal frame enters the ultra-high spreading ratio signal generation module, it is XORed with the synchronization spreading sequence and the information spreading sequence to generate an ultra-high spreading ratio signal. The synchronization spreading sequence is used to distinguish different station addresses, and the information spreading sequence is used to provide an ultra-long spreading code. After completing spread spectrum reception, the ground equipment sends the control parameters to the modulator to control the legitimate signal to slow down or change the modulation code to improve the signal's anti-interference capability, or to control the frequency point to avoid interference or to perform frequency hopping to avoid time-varying interference.

[0013] Furthermore, the full-band bandwidth of the broadband satellite signal is 1.6 GHz, and the maximum bandwidth of the legal signal is 300 MHz; the broadband signal receiving module implements sampling and processing of the 1.6 GHz broadband signal, extracts the legal signal, and transmits the sampled data to the interference intelligent identification module.

[0014] Furthermore, the interference damage prediction module automatically matches the simulation model library according to the interference type, characteristics and parameters to evaluate the impact of the interference signal on the legitimate signal.

[0015] Furthermore, the anti-interference decision module determines whether to adopt anti-interference measures for the broadband signal sent by the ground equipment and what anti-interference measures to adopt based on the results of the interference damage prediction and the interference parameters of the intelligent interference identification, and generates corresponding anti-interference parameters.

[0016] Furthermore, the ground equipment is provided with a spread spectrum signal receiving module, a frequency hopping parameter control module and a modulation and coding parameter control module. According to the configuration parameters, it can avoid aiming interference and sweep frequency interference by frequency hopping, and it can also improve the anti-interference ability of the broadband signal itself and resist broadband power interference by changing the modulation and coding method and rate.

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] 1. The present invention realizes the intelligent recognition of interference signal characteristics, can track time-varying interference signals, and obtain the time-varying laws of interference signals through autonomous learning.

[0019] 2. The present invention can evaluate the impact of interference on legitimate signals through interference damage prediction, and does not take avoidance measures for interference signals with low damage, thereby improving the stability of the system.

[0020] 3. The present invention targets time-varying interference signals and controls legitimate signals to perform frequency hopping to avoid interference according to their time-varying laws.

[0021] 4. In the present invention, the transmission of configuration parameters between the satellite and the ground is protected by an ultra-high spreading ratio of 10,000 to 100,000 hops, and interference is resisted by a spreading gain of up to 50 dB, thereby improving the reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of data transmission implementation in an embodiment of the present invention.

[0023] Figure 2 This is a diagram of an interference intelligent identification module according to an embodiment of the present invention.

[0024] Figure 3 This is a diagram of an interference damage prediction module according to an embodiment of the present invention.

[0025] Figure 4 This is a diagram of an anti-interference measure decision module according to an embodiment of the present invention.

[0026] Figure 5 2 is a diagram of an ultra-high spreading ratio signal generating module according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] The specific implementation of the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0028] A high-reliability, anti-interference, broadband data transmission system for a space-ground collaborative satellite includes a broadband signal receiving module, an intelligent interference recognition module, an interference damage prediction module, an anti-interference measure decision module, and an ultra-high spreading ratio signal generation module on satellite equipment, as well as ground equipment;

[0029] The broadband signal receiving module has the ability to collect and process full-band signals, extracting and processing legitimate broadband signals to achieve high-speed data transmission between satellites and the ground, or transmitting pre-processed data to the interference intelligent identification module;

[0030] The intelligent interference recognition module can find abnormal signals by automatically excluding legitimate signals. For fixed interference signals, it can obtain information about the frequency, bandwidth, and amplitude of the interference signal. For time-varying interference signals, it can continuously track their characteristic changes and obtain the time-varying patterns of the interference signal through autonomous learning.

[0031] The interference damage prediction module is used to determine whether the interference signal will affect the legitimate signal based on the characteristic parameters of the interference and legitimate signals;

[0032] The anti-interference measure decision module selects anti-interference measures including frequency hopping avoidance, no avoidance, changing modulation and coding methods, and speed reduction based on the information from the interference intelligent identification module and the results of the interference damage prediction module, and provides corresponding configuration parameters for the ground equipment;

[0033] During broadband signal reception, the intelligent interference recognition module continuously scans the spectrum of pre-processed data to locate and extract relevant parameters of the interference signal and complete interference classification. For time-varying interference signals, the intelligent interference recognition module obtains the time-varying patterns of the interference signal through model comparison and autonomous learning.

[0034] The interference damage prediction module compares the interference signal characteristic parameters with the legitimate signal parameters in the data sent by the broadband signal receiving module. It uses the interference parameters of the interference intelligent identification module to assess the degree of damage to the legitimate signal from the interference signal in multiple dimensions, including frequency overlap, power impact, and time-varying effects. The anti-interference measure decision module decides whether to take anti-interference measures based on the interference damage prediction results. After deciding to take anti-interference measures, the anti-interference measure decision module generates corresponding configuration parameters based on the pre-implanted frequency, rate, modulation code, and frequency hopping interference avoidance strategy, as well as the interference parameters of the interference intelligent identification module and the legitimate signal parameters of the broadband signal receiving module. These parameters are then composed into a control signal frame. After the control signal frame enters the ultra-high spreading ratio signal generation module, it is XORed with the synchronization spreading sequence and the information spreading sequence to generate an ultra-high spreading ratio signal. The synchronization spreading sequence is used to distinguish different station addresses, and the information spreading sequence is used to provide an ultra-long spreading code. After completing spread spectrum reception, the ground equipment sends the control parameters to the modulator to control the legitimate signal to slow down or change the modulation code to improve the signal's anti-interference capability, or to control the frequency point to avoid interference or to perform frequency hopping to avoid time-varying interference.

[0035] Furthermore, the full-band bandwidth of the broadband satellite signal is 1.6 GHz, and the maximum bandwidth of the legal signal is 300 MHz; the broadband signal receiving module implements sampling and processing of the 1.6 GHz broadband signal, extracts the legal signal, and transmits the sampled data to the interference intelligent identification module.

[0036] Furthermore, the interference damage prediction module automatically matches the simulation model library according to the interference type, characteristics and parameters to evaluate the impact of the interference signal on the legitimate signal.

[0037] Furthermore, the anti-interference decision module determines whether to adopt anti-interference measures for the broadband signal sent by the ground equipment and what anti-interference measures to adopt based on the results of the interference damage prediction and the interference parameters of the intelligent interference identification, and generates corresponding anti-interference parameters.

[0038] Furthermore, the ground equipment is provided with a spread spectrum signal receiving module, a frequency hopping parameter control module and a modulation and coding parameter control module. According to the configuration parameters, it can avoid aiming interference and sweep frequency interference by frequency hopping, and it can also improve the anti-interference ability of the broadband signal itself and resist broadband power interference by changing the modulation and coding method and rate.

[0039] Here is a more specific description:

[0040] The broadband signal receiving module uses high-speed A / D to sample the full-band signal. While receiving the legal signal, the acquired full-band signal sampling data is pre-processed and segmented before being transmitted to the interference intelligent identification module.

[0041] The intelligent interference identification module scans the segmented signal, identifies anomalies, estimates basic parameters, and then initiates real-time processing. For fixed interference signals, it uses FFT to obtain information about the frequency, bandwidth, and amplitude of the interference signal. For time-varying interference signals, it combines scanning with real-time processing to track changes in their characteristics and, through autonomous learning, identifies the time-varying patterns of the interference signal.

[0042] The interference damage prediction module determines whether the interference signal affects the legitimate signal and the degree of damage to the legitimate signal based on the characteristic parameters of the interference and legitimate signals.

[0043] The anti-interference measure decision module makes automatic decisions based on the results of intelligent interference identification and interference damage prediction. For interference signals with low damage, it may not be avoided or the anti-interference ability of the legitimate signal may be improved by changing the modulation coding and reducing the speed; for fixed interference signals with high damage, new frequency points can be automatically allocated to avoid the interference signal; for time-varying interference signals with high damage, the frequency hopping function of the legitimate signal is activated to avoid interference according to the time-varying law of the parameters.

[0044] The configuration parameters generated by the anti-interference measure decision-making part protect the transmission signal through an ultra-high spreading ratio of 10,000 to 100,000, providing a spreading gain of up to 50dB to resist interference and ensure that the configuration parameters can be correctly sent to the ground equipment.

[0045] The ground equipment controls the frequency hopping, modulation coding, and transmission rate of the broadband signal based on the received configuration parameters to avoid interference.

[0046] This embodiment monitors the time-varying characteristics of the full-band channel while completing broadband signal reception. Once an interference signal is found to affect the quality of the legitimate broadband signal, the legitimate signal will be controlled to effectively circumvent it by changing the frequency, reducing the speed, changing the modulation code, or frequency hopping. Figure 1 .

[0047] The parameters of the control legal signal are protected by ultra-high spread spectrum ratio, which can provide a spread spectrum gain of up to 50dB to resist interference and ensure the correct transmission of the control parameters. Figure 1 .

[0048] The intelligent interference recognition module in the present invention locates and extracts interference signal related parameters and completes interference classification through uninterrupted spectrum scanning. For time-varying interference signals, the intelligent interference recognition module obtains the time-varying law of interference signals through model comparison and autonomous learning. Figure 2 .

[0049] The interference damage prediction module of the present invention compares the interference signal characteristic parameters with the legitimate signal parameters to evaluate the degree of damage caused by the interference signal to the legitimate signal in multiple dimensions such as frequency overlap, power impact and time-varying impact. Figure 3 .

[0050] The anti-interference measure decision module in the present invention decides whether to take anti-interference measures based on the results of the interference damage prediction. After deciding to take anti-interference measures, the anti-interference measure decision module generates corresponding configuration parameters based on the pre-implanted frequency, rate, modulation coding and frequency hopping interference avoidance strategy, and composes the control signal frame. Figure 4 .

[0051] After the control signal frame enters the ultra-high spreading ratio signal generation module, it performs an XOR operation with the synchronous spreading sequence and the information spreading sequence to generate an ultra-high spreading ratio signal. The synchronous spreading sequence is used to distinguish different station addresses, and the information spreading sequence is used to provide an ultra-long spreading code. Figure 5 .

[0052] After the ground equipment completes the spread spectrum reception, it sends the control parameters to the modulator to control the legal signal to slow down or change the modulation code to improve the signal's anti-interference ability, or control the frequency point to avoid interference, or perform frequency hopping to avoid time-varying interference. Figure 1 .

[0053] The contents not described in detail in this embodiment are well known in the art.

[0054] The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent replacement or modification made by a person skilled in the art based on the technical solution and inventive concept of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A high-reliability, anti-interference, broadband data transmission system for space-ground collaborative satellites, characterized in that: It includes the broadband signal receiving module, interference intelligent identification module, interference damage prediction module, anti-interference measure decision module and ultra-high spread spectrum ratio signal generation module on the satellite equipment and ground equipment; The broadband signal receiving module has the ability to collect and process full-band signals, extracting and processing legitimate broadband signals to achieve high-speed data transmission between satellites and the ground, or transmitting pre-processed data to the interference intelligent identification module; The intelligent interference recognition module can find abnormal signals by automatically excluding legitimate signals. For fixed interference signals, it can obtain information about the frequency, bandwidth, and amplitude of the interference signal. For time-varying interference signals, it can continuously track their characteristic changes and obtain the time-varying patterns of the interference signal through autonomous learning. The interference damage prediction module is used to determine whether the interference signal will affect the legitimate signal based on the characteristic parameters of the interference and legitimate signals; The anti-interference measure decision module selects anti-interference measures including frequency hopping avoidance, no avoidance, changing modulation and coding methods, and speed reduction based on the information from the interference intelligent identification module and the results of the interference damage prediction module, and provides corresponding configuration parameters for the ground equipment; During broadband signal reception, the intelligent interference recognition module continuously scans the spectrum of pre-processed data to locate and extract relevant parameters of the interference signal and complete interference classification. For time-varying interference signals, the intelligent interference recognition module obtains the time-varying patterns of the interference signal through model comparison and autonomous learning. The interference damage prediction module compares the interference signal characteristic parameters and legal signal parameters of the data sent by the broadband signal receiving module, and evaluates the degree of damage of the interference signal to the legal signal in multiple dimensions including frequency overlap, power impact and time-varying impact through the interference parameters of the interference intelligent identification module; the anti-interference measure decision module decides whether to take anti-interference measures based on the results of the interference damage prediction module. After deciding to take anti-interference measures, the anti-interference measure decision module generates corresponding configuration parameters based on the pre-implanted frequency, rate, modulation coding and frequency hopping interference avoidance strategy, as well as 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 spreading ratio signal generation module, it performs an XOR operation with the synchronous spreading sequence and the information spreading sequence to generate an ultra-high spreading ratio signal, where the synchronous spreading sequence is used to distinguish different station addresses, and the information spreading sequence is used to provide an ultra-long spreading code; After the ground equipment completes the spread spectrum reception, it sends the configuration parameters to the frequency hopping parameter control module and the modulation and coding parameter control module to control the legal signal to slow down or change the modulation and coding to improve the signal's anti-interference ability, or control the frequency change to avoid interference, or perform frequency hopping to avoid time-varying interference; the configuration parameters sent to the frequency hopping parameter control module and the modulation and coding parameter control module include pre-implanted frequency, rate, modulation and coding, and spread spectrum ratio.

2. The high-reliability, anti-interference, broadband data transmission system for space-ground collaborative satellites according to claim 1, characterized in that: The full-band bandwidth of the broadband satellite signal is 1.6GHz, and the maximum bandwidth of the legal signal is 300MHz; the broadband signal receiving module implements sampling and processing of the 1.6GHz broadband signal, extracts the legal signal, and transmits the sampled data to the interference intelligent identification module.

3. The high-reliability, anti-interference, broadband data transmission system for space-ground collaborative satellites according to claim 1, characterized in that: The anti-interference measure decision module determines whether to adopt anti-interference measures for the broadband signal sent by the ground equipment and what anti-interference measures to adopt based on the results of interference damage prediction and interference parameters of intelligent interference identification, and generates corresponding anti-interference parameters.

Images