Satellite communication inter-satellite transmission signal system, signal system and signal processing method

Abstract

This invention relates to the field of satellite communication technology, and provides an inter-satellite transmission signal system, a signal system, and a signal processing method. The inter-satellite transmission signal system includes M GEO satellites, M signal modulation units, and M signal demodulation units. Each GEO satellite includes one signal modulation unit and one signal demodulation unit. Two inter-satellite signal paths exist between any two adjacent GEO satellites; one path is used to transmit a first signal, and the other path is used to receive a second signal. The signal modulation units are used to perform orthogonal modulation on the communication signals and telemetry and control signals; the signal demodulation units are used to perform orthogonal demodulation on the modulated signals. The system described in this invention improves the versatility and interchangeability of the system structure, and the signal system can integrate communication and telemetry and control signals for information processing, improving the integration level of the signal system and thus improving the utilization rate of transmission channels and power resources.

Description

Technical Field

[0001] This invention relates to the field of satellite communication technology, and in particular to a satellite communication inter-satellite transmission signal system, signal system, and signal processing method. Background Technology

[0002] A satellite communication constellation system composed of multiple geostationary orbit (GEO) satellites has the characteristics of wide coverage area and support for inter-satellite communication. For example, a constellation composed of three GEO satellites has the ability to communicate between the three satellites (any two satellites), that is, it can support inter-satellite communication.

[0003] According to the different types of services and service types transmitted, the signals transmitted by inter-satellite communication systems can be broadly divided into two types: communication data signals from satellite payload transponders and telemetry and control operation signals from satellite platforms, referred to as communication signals and telemetry and control signals.

[0004] In related technologies, the inter-satellite communication information transmission field typically adopts a "separate and independent" transmission design signal system, that is, using two independent physical transmission channels to transmit communication signals and telemetry and control signals respectively. This system requires a wide variety of onboard communication equipment, which is heavy and consumes a lot of power, and cannot meet the development needs of miniaturization and integration of onboard equipment. In addition, the signal system lacks effective information processing and management methods when transmitting the above two types of signals, and does not meet the development concept of satellite electronic information fusion, resulting in poor coupling and low integration between onboard single-unit modules, which is not conducive to the effective utilization of transmission channels and power resources. Summary of the Invention

[0005] This invention provides a satellite communication inter-satellite transmission signal system, a signal system, and a signal processing method to solve the defects of existing inter-satellite communication signal systems, such as complex structure, large system weight and power consumption, poor coupling between onboard modules, low integration, and low utilization of transmission channels and power resources. It realizes the integrated processing of inter-satellite communication signals and telemetry and control signals of satellite constellations.

[0006] This invention provides an inter-satellite communication signal transmission system, comprising: M geostationary orbit GEO satellites, M signal modulation units, and M signal demodulation units; wherein each GEO satellite is provided with one signal modulation unit and one signal demodulation unit; M is a positive integer greater than 2;

[0007] Two inter-satellite signal paths exist between any two adjacent first and second GEO satellites among the M GEO satellites; one inter-satellite signal path is used for the first GEO satellite to transmit a first signal to the second GEO satellite, and the other inter-satellite signal path is used for the first GEO satellite to receive a second signal transmitted by the second GEO satellite; the first signal includes at least one of communication signals, telemetry and control signals, and modulation signals; the second signal includes at least one of communication signals, telemetry and control signals, and modulation signals; the first GEO satellite and the second GEO satellite are visible to each other.

[0008] Each signal modulation unit is used to perform quadrature modulation on the communication signal and the measurement and control signal when the first signal includes a communication signal and a measurement and control signal, to obtain the modulated signal;

[0009] Each signal demodulation unit is used to perform quadrature demodulation on the modulated signal when the second signal includes a modulated signal, to obtain a demodulated signal;

[0010] The in-phase quadrature modulation factor used in the quadrature modulation is the same as the in-phase quadrature demodulation factor used in the quadrature demodulation.

[0011] According to the present invention, an inter-satellite transmission signal system for satellite communication is provided, wherein the signal modulation unit modulates the communication signal in the in-phase branch using UQPSK to obtain the modulated communication signal, and modulates the telemetry and control signal in the quadrature branch to obtain the modulated telemetry and control signal; the average power of the modulated communication signal and the modulated telemetry and control signal is the same.

[0012] According to the present invention, an inter-satellite transmission signal system for satellite communication is provided, the system further includes:

[0013] There are M ground tracking and control stations; different GEO satellites are connected to different ground tracking and control stations.

[0014] The present invention also provides a signal system, comprising:

[0015] Multiple sets of the aforementioned inter-satellite communication signal transmission systems;

[0016] Each satellite communication inter-satellite transmission signal system includes one master GEO satellite and at least two slave GEO satellites;

[0017] Inter-satellite signaling pathways include intra-network inter-satellite signaling pathways and inter-network inter-satellite signaling pathways;

[0018] For the same group of satellite communication inter-satellite transmission signal systems, any two adjacent GEO satellites can transmit a first signal or a second signal through the intra-network inter-satellite signal path;

[0019] For any two adjacent sets of satellite communication inter-satellite transmission signal systems, the first signal or the second signal is transmitted through the inter-satellite signal path between two adjacent but different sets of GEO satellites.

[0020] The present invention also provides a signal processing method, comprising:

[0021] The type of signal to be processed from the target GEO satellite is identified; wherein the target GEO satellite is at least one of multiple geostationary orbit GEO satellites; there are two inter-satellite signal paths between any two adjacent first and second GEO satellites; one inter-satellite signal path is used for the first GEO satellite to send a first signal to the second GEO satellite, and the other inter-satellite signal path is used for the first GEO satellite to receive a second signal sent by the second GEO satellite; the first signal and the second signal are at least one of communication signal, telemetry and control signal, and modulation signal, respectively.

[0022] When the signal to be processed is the first signal, and the first signal includes a communication signal and a measurement and control signal, the communication signal and the measurement and control signal are quadrature modulated to obtain the modulated signal; when the signal to be processed is the second signal, and the second signal includes a modulated signal, the modulated signal is quadrature demodulated to obtain the demodulated signal; wherein, the in-phase quadrature modulation factor used in the quadrature modulation is the same as the in-phase quadrature demodulation factor used in the quadrature demodulation.

[0023] The modulated signal or the demodulated signal is forwarded to other GEO satellites according to the target mission requirements, wherein the other GEO satellites are at least one of multiple GEO satellites.

[0024] According to a signal processing method provided by the present invention, the step of orthogonally modulating the communication signal and the measurement and control signal to obtain the modulated signal includes:

[0025] The communication signal is modulated in the in-phase branch using UQPSK to obtain the modulated communication signal, and the measurement and control signal is modulated in the quadrature branch to obtain the modulated measurement and control signal; the average power of the modulated communication signal and the modulated measurement and control signal is the same.

[0026] According to a signal processing method provided by the present invention, the inter-satellite signal path includes an intra-network inter-satellite signal path and an inter-network inter-satellite signal path; multiple GEO satellites include multiple satellite groups, each satellite group including one master GEO satellite and at least two slave GEO satellites;

[0027] For the same group of satellites, any two adjacent GEO satellites can transmit a first signal or a second signal through the inter-satellite signal path within the network;

[0028] For any two adjacent groups of satellites, the first or second signal is transmitted through the inter-satellite signal path between two adjacent but different groups of GEO satellites.

[0029] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the signal processing method described above.

[0030] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the signal processing method as described above.

[0031] The present invention also provides a computer program product, including a computer program that, when executed by a processor, implements the signal processing method as described above.

[0032] The satellite communication inter-satellite transmission signal system, signal system, and signal processing method provided by this invention establish two inter-satellite signal paths between any two adjacent GEO satellites. One inter-satellite signal path is used to transmit a first signal, and the other inter-satellite signal path is used to receive a second signal transmitted by a second GEO satellite. By setting a signal modulation unit on each GEO satellite to perform orthogonal modulation on the communication signal and the telemetry and control signal when the first signal includes communication signal and telemetry and control signal, and setting a signal demodulation unit to perform orthogonal demodulation on the modulated signal when the second signal includes modulated signal, the system structure has a high degree of modularity, which improves the versatility and interchangeability of the system structure. Moreover, this signal system can integrate communication and telemetry and control signals for information processing, which improves the integration of the signal system and thus improves the utilization rate of transmission channels and power resources. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0034] Figure 1 This is one of the structural schematic diagrams of the inter-satellite transmission signal system for satellite communication provided by the present invention.

[0035] Figure 2 This is the second schematic diagram of the inter-satellite transmission signal system for satellite communication provided by the present invention.

[0036] Figure 3 This is the third schematic diagram of the inter-satellite transmission signal system for satellite communication provided by the present invention.

[0037] Figure 4 This is one of the flowcharts of the signal processing method provided by the present invention.

[0038] Figure 5 This is the second flowchart of the signal processing method provided by the present invention.

[0039] Figure 6 This is the fourth schematic diagram of the inter-satellite transmission signal system for satellite communication provided by the present invention.

[0040] Figure 7 This is one of the structural schematic diagrams of the signal system provided by the present invention.

[0041] Figure 8 This is the second schematic diagram of the signal system provided by the present invention.

[0042] Figure 9 This is the third flowchart of the signal processing method provided by the present invention.

[0043] Figure 10 This is the fourth flowchart of the signal processing method provided by the present invention.

[0044] Figure 11 This is a schematic diagram of the structure of the electronic device provided by the present invention.

[0045] Figure label:

[0046] 100: Inter-satellite transmission signal system for satellite communication; 110: GEO satellite;

[0047] 111: Signal modulation unit; 112: Signal demodulation unit; 120: Ground telemetry and control station. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0049] The following is combined Figures 1-10 This invention describes the satellite communication inter-satellite transmission signal system, signal system, and signal processing method.

[0050] Figure 1 This is one of the structural schematic diagrams of the inter-satellite transmission signal system for satellite communication provided by the present invention, such as... Figure 1 As shown, the inter-satellite communication signal transmission system 100 includes: M geostationary orbit GEO satellites 110, M signal modulation units 111 and M signal demodulation units 112.

[0051] Each GEO satellite 110 is equipped with a signal modulation unit 111 and a signal demodulation unit 112; M is a positive integer greater than 2.

[0052] In this embodiment, a satellite communication inter-satellite transmission signal system 100 may include three GEO satellites 110 (GEO-1, GEO-2, and GEO-3), specifically including one master GEO satellite 110 and two slave GEO satellites 110. Among them, GEO-1 satellite is the master satellite of the constellation system, referred to as the master satellite. GEO-2 and GEO-3 satellites are two adjacent satellites of GEO-1 satellite, located to the west and east of GEO-1 satellite, respectively. They are slave satellites of the constellation system, referred to as slave satellites. The constellation configuration adopts a typical three-satellite equally spaced arrangement design, that is, any two satellites are spaced 120 degrees apart.

[0053] In some embodiments, the inter-satellite communication signal transmission system 100 may further include a master GEO satellite 110 and multiple slave GEO satellites 110.

[0054] In this embodiment, each GEO satellite 110 is equipped with at least one signal modulation unit 111. When transmitting the signal to be modulated, the signal is modulated according to the target modulation type to obtain the modulated signal.

[0055] In this embodiment, the target modulation type includes unbalanced quadrature phase keying amplitude modulation (UQPSK), quadrature phase shift keying (QPSK), modulation AM, frequency modulation FM, phase modulation PM, or other modulation methods.

[0056] In this embodiment, each GEO satellite 110 is equipped with at least one signal demodulation unit 112, which demodulates the signal according to the target modulation type when receiving the modulated signal to obtain the demodulated signal.

[0057] Among the M GEO satellites 110, there are two inter-satellite signal paths between any two adjacent first and second GEO satellites; one inter-satellite signal path is used for the first GEO satellite to send a first signal to the second GEO satellite, and the other inter-satellite signal path is used for the first GEO satellite to receive a second signal sent by the second GEO satellite; the first signal includes at least one of communication signal, telemetry and control signal, and modulation signal; the second signal includes at least one of communication signal, telemetry and control signal, and modulation signal; the field of view between the first and second GEO satellites is visible.

[0058] Taking a satellite communication inter-satellite transmission signal system 100 comprising 3 GEO satellites 110 (i.e., M=3) as an example, GEO-1 is the master satellite, and GEO-2 and GEO-3 are two slave satellites. The number of inter-satellite signal paths between any two GEO satellites 110 in this constellation is N=6, including one inter-satellite communication link between GEO-1 and GEO-2 (two bidirectional transmission signal paths), one inter-satellite communication link between GEO-1 and GEO-3, and one inter-satellite communication link between GEO-2 and GEO-3.

[0059] Figure 2 This is the second schematic diagram of the inter-satellite transmission signal system for satellite communication provided by the present invention. Figure 2 In the embodiment shown, the inter-satellite communication signal transmission system 100 further includes: M ground tracking and control stations 120; different GEO satellites 110 are connected to different ground tracking and control stations 120.

[0060] In this embodiment, the ground control station 120 can directly track, measure, telemetry and remote control the spacecraft; specifically, the functions of the ground control station 120 include the following aspects: (1) Tracking and measurement: through the transmitter and antenna feeder and other equipment, the ground control station 120 accurately tracks and measures the spacecraft and obtains key parameters such as the spacecraft's position and speed; (2) Telemetry: collects various data of the spacecraft's operation in orbit, such as temperature, pressure and power, and transmits these data back to the ground control center; (3) Remote control: controls the spacecraft according to the instructions of the ground control center, such as adjusting attitude and performing specific tasks; (4) Communication: maintains uninterrupted communication between the spacecraft and the ground control center to ensure that instructions and data can be transmitted in real time.

[0061] Figure 3 This is the third schematic diagram of the inter-satellite transmission signal system for satellite communication provided by the present invention. Figure 3 In the illustrated embodiment, the interfaces for each signal (including communication signals and measurement and control signals, hereinafter the same) are designed as follows:

[0062] (01) The signal from the main satellite GEO-1 is sent to the corresponding ground station.

[0063] (02) Signals from the slave satellite GEO-2 are transmitted to the master satellite GEO-1 for reception via the inter-satellite signal path [S21].

[0064] (03) The signal from the primary satellite GEO-1 is forwarded to the secondary satellite GEO-2 through the inter-satellite signal path [S12].

[0065] (04) The signal from the primary satellite GEO-1 is forwarded (distributed) to the secondary satellite GEO-3 through the inter-satellite signal path [S13].

[0066] (05) Signals from the slave satellite GEO-3 are transmitted to the master satellite GEO-1 for reception via the inter-satellite signal path [S31].

[0067] (06) The signal from the GEO-2 satellite is forwarded to the main satellite GEO-1 through the inter-satellite signal path [S21].

[0068] (07) Signals from the primary satellite GEO-1 are transmitted to the secondary satellite GEO-2 via the inter-satellite signal path [S12].

[0069] (08) Signals from satellite GEO-3 are transmitted to satellite GEO-2 via inter-satellite signal path [S32].

[0070] (09) The signal from satellite GEO-2 is forwarded (distributed) to satellite GEO-3 via the inter-satellite signal path [S23].

[0071] (10) The signal from the GEO-2 satellite is sent to the corresponding ground station.

[0072] (11) The signal from the GEO-3 satellite is forwarded to the main satellite GEO-1 through the inter-satellite signal path [S31].

[0073] (12) Signals from the primary satellite GEO-1 are transmitted to the secondary satellite GEO-3 via the inter-satellite signal path [S13].

[0074] (13) The signal from satellite GEO-3 is forwarded (distributed) to satellite GEO-2 via the inter-satellite signal path [S32].

[0075] (14) Signals from the slave satellite GEO-2 are transmitted to the slave satellite GEO-3 for reception via the inter-satellite signal path [S23].

[0076] (15) The signal from the GEO-3 satellite is sent to the corresponding ground station.

[0077] exist Figure 1 In the illustrated embodiment, each signal modulation unit 111 is used to perform quadrature modulation on the communication signal and the measurement and control signal to obtain a modulated signal when the first signal includes a communication signal and a measurement and control signal.

[0078] In this embodiment, the first signal may include one or more of a communication signal, a telemetry and control signal, or a modulation signal. When the first signal includes a communication signal and a telemetry and control signal, the communication signal and the telemetry and control signal are orthogonally modulated according to a specified modulation format by the signal modulation unit 111 set on the current GEO satellite 110 to obtain a modulation signal, thereby realizing the transmission of the communication signal and the telemetry and control signal modulated together.

[0079] exist Figure 1 In the illustrated embodiment, each signal demodulation unit 112 is used to perform quadrature demodulation on the modulated signal to obtain a demodulated signal when the second signal includes the modulated signal.

[0080] In this embodiment, the second signal may also include one or more of communication signals, telemetry and control signals, or modulation signals. When the second signal includes a modulation signal, the communication signal and the telemetry and control signal are orthogonally modulated according to a specified modulation format by the signal demodulation unit 112 set on the current GEO satellite 110 to obtain a modulation signal, thereby realizing the transmission of the communication signal and the telemetry and control signal modulated together.

[0081] In this embodiment, the in-phase quadrature modulation factor used in quadrature modulation is the same as the in-phase quadrature demodulation factor used in quadrature demodulation, and the average power (root mean square value) of the two types of signals after quadrature modulation is the same.

[0082] The inter-satellite transmission signal system for satellite communication provided in this invention has two inter-satellite signal paths between any two adjacent GEO satellites. One inter-satellite signal path is used to transmit a first signal, and the other inter-satellite signal path is used to receive a second signal transmitted by a second GEO satellite. By setting a signal modulation unit on each GEO satellite to perform orthogonal modulation on the communication signal and the telemetry and control signal when the first signal includes communication signal and telemetry and control signal, and setting a signal demodulation unit to perform orthogonal demodulation on the modulated signal when the second signal includes modulated signal, the system has a high degree of modularity, which improves the versatility and interchangeability of the system structure. Moreover, this signal system can perform integrated information processing of communication and telemetry and control signals, which improves the integration of the signal system and thus improves the utilization rate of transmission channels and power resources.

[0083] In some embodiments, the signal modulation unit uses UQPSK to modulate the communication signal in the in-phase branch to obtain the modulated communication signal, and modulates the measurement and control signal in the quadrature branch to obtain the modulated measurement and control signal; the average power of the modulated communication signal and the modulated measurement and control signal is the same.

[0084] Figure 4 This is one of the flowcharts of the signal processing method provided by the present invention. Figure 4In the embodiment shown, the communication signal and the measurement and control signal are modulated together and transmitted using the UQPSK method (corresponding to [3]), and up-conversion amplification and transmission processing is performed; the specific modulation parameters are designed as follows:

[0085] (a) Design in phase ( I Modulated signals on branch lines, such as modulating communication signals on in-phase (in-phase) signals. I On the branch of the path, the modulation rate (corresponding to the modulation code rate) can be designed as R. I =20Mbps, corresponding to [1];

[0086] (b) Design orthogonal ( Q Modulated signals on branch lines, such as modulation of measurement and control signals onto orthogonal (path) branches. Q On the branch of the path, the modulation rate (corresponding to the modulation code rate) can be designed as R. Q =1Mbps, corresponding to [2];

[0087] (c) The information rate of the measurement and control signal is designed to be 1~4kbps, which is adjusted to a modulation rate of 1Mbps after the code rate is adjusted.

[0088] (d) The two rates satisfy the following relationship: R I = 20×R Q ;

[0089] (e) I Luhe Q The average power (root mean square value) of the modulated signals is the same.

[0090] (f) Use the same set of in-phase quadrature modulation factors (corresponding in-phase quadrature function modulation factors) and demodulation factors in modulation and demodulation.

[0091] It should be noted that the parameters selected in (a), (b), and (c) above are typical values ​​for reference only. Actual designs may also use... I On-road modulation and control signals, Q Modulated communication signals on the road; in addition, the communication signal rate R I Relatively high, generally not exceeding 100Mbps, measurement and control signal rate R Q The speed is relatively low, generally not exceeding 10 Mbps; the ratio of the two speeds described in (d) can be determined according to the actual design.

[0092] In this embodiment, the communication and telemetry signals in each GEO satellite use the same UQPSK modulation and demodulation methods.

[0093] exist Figure 4In the illustrated embodiment, the signals transmitted from the first GEO satellite to the second GEO satellite include communication signals and telemetry and control signals; wherein, the communication signals... This can be expressed by the following formula:

[0094] ;

[0095] Measurement and control signals This can be expressed by the following formula:

[0096] ;

[0097] in, and Belongs to NRZ-S code, symbol period , ; k Multiples, High level It is a negative voltage level.

[0098] The second GEO satellite (receiving front end) receives the signal and combines it with the low-frequency signal determined by frequency synthesis to perform down-conversion processing (corresponding to [4]). The down-converted signal is then modulated by UQPSK to obtain the modulated signal. It can be expressed by the following formula:

[0099]

[0100] in, For carrier frequency, The in-phase modulation factor, It is an orthogonal modulation factor. It is a complex unit.

[0101] The second signal received by the second GEO satellite Including the above-mentioned modulated signal, it is represented as:

[0102] ;

[0103] in, and Multiplicative noise interference on the transmission channel, acting on... Q Luhe I On the road; It is the equivalent additive noise interference on the transmission channel, which acts on the entire received signal.

[0104] The signal demodulation unit on the second GEO satellite demodulates the received modulated signal to obtain the demodulated communication signal. (corresponding to [5]) and the demodulated measurement and control signal (corresponding to [6]), represented as:

[0105] ;

[0106] ;

[0107] in, The in-phase demodulation factor has the same frequency as the in-phase modulation factor, and the phase difference between the modulation and demodulation carriers is constant. , It is the quadrature demodulation factor, with the same frequency as the quadrature modulation factor, but with a constant phase difference. , and The constant value of the demodulated signal power coefficient is determined by the residual noise (multiplicative noise, additive noise) of various transmission channels and the constant phase difference. These factors contribute to the formation of the signal; after demodulation by UQPSK, the original communication signal can be restored without distortion. and measurement and control signals .

[0108] Figure 5 This is the second flowchart of the signal processing method provided by the present invention. Figure 5 In the illustrated embodiment, taking the primary satellite GEO-1 as an example, the communication and telemetry signals from this satellite are modulated using UQPSK and then transmitted to GEO-2 and distributed to GEO-3 respectively through the inter-satellite signal path; for the secondary satellites GEO-2 or GEO-3, then... Figure 5 The corresponding signal will be transmitted to GEO-1 via the inter-satellite signal path, and then distributed to GEO-3 or GEO-2.

[0109] Because the signal system of the present invention has good versatility and interchangeability in transmitting and receiving inter-satellite signals, it is not only convenient for system integration, but also helpful for the future expansion and development of the system. The number of GEO satellites applicable to this embodiment is not limited to 3. If it is increased to 6, the satellites in the constellation are spaced 60 degrees apart, and the field of view between two adjacent satellites is still visible, but the field of view between two or more satellites will not be visible.

[0110] Figure 6 This is the fourth schematic diagram of the inter-satellite transmission signal system for satellite communication provided by the present invention. Figure 6In the illustrated embodiment, the six satellites are divided into two groups of three, forming a small network for inter-satellite signal communication. GEO-1, GEO-2, and GEO-3 form one network, with GEO-1 as the master satellite and the other two as slave satellites. GEO-4, GEO-5, and GEO-6 form another network, with GEO-6 as the master satellite and the other two as slave satellites. The two networks can operate independently, or they can transmit communication and telemetry signals between all six satellites in the two networks through the inter-network and inter-satellite signal path between GEO-2 and GEO-4, or between GEO-3 and GEO-5.

[0111] The inter-satellite communication signal transmission system provided in this embodiment of the invention modulates the communication signal in the in-phase branch using UQPSK mode to obtain the modulated communication signal, and modulates the telemetry and control signal in the quadrature branch to obtain the modulated telemetry and control signal. The modulated communication signal and the modulated telemetry and control signal have the same average power, which expands the inter-satellite signal transmission scenarios and further improves the transmission channel and power resources.

[0112] It should be noted that for more complex application scenarios, the number of satellites may be as many as dozens. In this case, the dozens of satellites can be divided into 3 to 5 satellite groups according to the constellation configuration and orbital position. Each group consists of a primary satellite and several secondary satellites.

[0113] The signal system provided by the present invention is described below. The signal system described below can be referred to in correspondence with the satellite communication inter-satellite transmission signal system described above.

[0114] Figure 7 This is one of the structural schematic diagrams of the signal system provided by the present invention, such as... Figure 7 As shown, the signal system includes: multiple sets of inter-satellite communication signal transmission systems 100; wherein each set of inter-satellite communication signal transmission systems 100 includes one master GEO satellite and at least two slave GEO satellites; the inter-satellite signal paths include intra-network inter-satellite signal paths and inter-network inter-satellite signal paths; for the same set of inter-satellite communication signal transmission systems, any two adjacent GEO satellites transmit a first signal or a second signal through the intra-network inter-satellite signal path; for any two adjacent sets of inter-satellite communication signal transmission systems, the first signal or the second signal is transmitted through the inter-network inter-satellite signal path between two adjacent but different sets of slave GEO satellites.

[0115] In this example, the number of GEO satellites in each group of satellite communication inter-satellite transmission signal systems 100, the intra-network inter-satellite signal paths between adjacent satellites, and the types of signals to be transmitted and the signal modulation and demodulation methods corresponding to the intra-network inter-satellite signal paths and inter-network inter-satellite signal paths are as follows: Figures 1 to 5 As shown in the corresponding embodiment, this embodiment will not be described again.

[0116] Figure 8 This is the second schematic diagram of the signal system provided by the present invention. Figure 8 In the illustrated embodiment, GROUP-1 contains 3 satellites, and GROUP-5 contains a maximum of 7 satellites. When the number of satellites in a group exceeds 3, the signal system architecture can remain unchanged. It is only necessary to expand the number of branching paths in the inter-satellite signal processing method to correspond to the number of slave satellites in the group, and expand the "whether to forward to other satellites" branch in the inter-satellite signal processing method to cover all slave satellites in the corresponding group. In addition, communication signals and telemetry and control signals of all satellites in the two groups can be transmitted between each adjacent group through the inter-network inter-satellite signal path, thereby realizing inter-satellite communication data transmission between all dozens of satellites in the entire network.

[0117] The signal system provided in this invention establishes communication links between different groups of satellite communication inter-satellite transmission signal systems through inter-network and inter-satellite signal paths, and realizes full-chain communication for satellite communication inter-satellite transmission signal systems in the same or different groups, thereby improving the integration and scalability of the signal system and thus improving the efficiency and flexibility of satellite communication inter-satellite transmission signals.

[0118] The signal processing method provided by the present invention is described below. The signal processing method described below can be referred to in correspondence with the satellite communication inter-satellite transmission signal system described above.

[0119] Figure 9 This is the third flowchart of the signal processing method provided by the present invention, as shown below. Figure 9 As shown, the signal processing method includes the following steps:

[0120] Step 910: Confirm the type of signal to be processed from the target GEO satellite; wherein, the target GEO satellite is at least one of multiple geostationary orbit GEO satellites; there are two inter-satellite signal paths between any two adjacent first and second GEO satellites among the multiple GEO satellites; one inter-satellite signal path is used for the first GEO satellite to send a first signal to the second GEO satellite, and the other inter-satellite signal path is used for the first GEO satellite to receive a second signal sent by the second GEO satellite; the first signal and the second signal are at least one of communication signal, telemetry and control signal, and modulation signal, respectively.

[0121] In this embodiment, the inter-satellite transmission signal system for satellite communication may further include a master GEO satellite and multiple slave GEO satellites, wherein the target GEO satellite belongs to either the master GEO satellite or the slave GEO satellite.

[0122] In this embodiment, the field of view is visible between the first GEO satellite and the second GEO satellite.

[0123] Step 920: When the signal to be processed is a first signal, and the first signal includes a communication signal and a measurement and control signal, the communication signal and the measurement and control signal are quadrature modulated to obtain a modulated signal; when the signal to be processed is a second signal, and the second signal includes a modulated signal, the modulated signal is quadrature demodulated to obtain a demodulated signal; wherein, the in-phase quadrature modulation factor used in quadrature modulation is the same as the in-phase quadrature demodulation factor used in quadrature demodulation.

[0124] In this embodiment, each GEO satellite is equipped with at least one signal modulation unit. When transmitting the signal to be modulated, the signal is modulated according to the target modulation type to obtain the modulated signal.

[0125] In this embodiment, the modulation type can be unbalanced quadrature phase keying amplitude modulation (UQPSK), quadrature phase shift keying (QPSK), or other modulation methods.

[0126] In this embodiment, each GEO satellite is equipped with at least one signal demodulation unit. When receiving a modulated signal, the signal is demodulated according to the target modulation type to obtain a demodulated signal.

[0127] Taking a satellite communication inter-satellite transmission signal system consisting of 3 GEO satellites (i.e., M=3) as an example, GEO-1 is the master satellite, and GEO-2 and GEO-3 are two slave satellites. The number of inter-satellite signal paths between any two GEO satellites in this constellation is N=6, including one inter-satellite communication link between GEO-1 and GEO-2 (two bidirectional transmission signal paths), one inter-satellite communication link between GEO-1 and GEO-3, and one inter-satellite communication link between GEO-2 and GEO-3.

[0128] In this embodiment, the signal modulation unit uses UQPSK to modulate the communication signal in the in-phase branch to obtain the modulated communication signal, and modulates the measurement and control signal in the quadrature branch to obtain the modulated measurement and control signal; the average power of the modulated communication signal and the modulated measurement and control signal is the same.

[0129] In this embodiment, the inter-satellite communication signal transmission system further includes: M ground tracking and control stations; different GEO satellites are connected to different ground tracking and control stations.

[0130] Step 930: Forward the modulated or demodulated signal to other GEO satellites according to the target mission requirements. The other GEO satellites are at least one of multiple GEO satellites.

[0131] Figure 10 This is the fourth flowchart of the signal processing method provided by the present invention. Figure 10In the illustrated embodiment, taking the primary satellite GEO-1 receiving inter-satellite signals from the adjacent secondary satellite GEO-2 as an example, the signal is first demodulated using UQPSK to recover the communication and telemetry / control (TT&C) signals. Then, based on the specific mission requirements for transmitting communication signals during satellite operation, generally categorized into "satellite-to-ground transmission mission requirements" and "inter-satellite transmission mission requirements," it is determined whether the communication signal needs to be transmitted to the GEO-3 satellite via the inter-satellite signal path. If so, it is transmitted to the secondary satellite GEO-3; otherwise, it is transmitted to the ground station. The TT&C signals require analysis and identification to determine if they contain TT&C signals from the primary satellite GEO-1. If so, they are sent to the primary satellite's TT&C signal processing unit for further identification and processing. If not, based on the specific mission requirements for transmitting TT&C signals during satellite operation, it is determined whether the TT&C signals need to be forwarded to the GEO-3 satellite via the inter-satellite signal path. If so, they are transmitted to the secondary satellite GEO-3; otherwise, the TT&C signal data is discarded.

[0132] In this embodiment, the inter-satellite communication scenario can be divided into the following cases:

[0133] (1) For the application scenario where the primary satellite GEO-1 receives inter-satellite signals from the neighboring satellite GEO-3, the inter-satellite signals from GEO-3 are first demodulated using UQPSK, and then the signals are correspondingly... Figure 10 The conditional branch "whether to forward to GEO-3 satellite" is changed to "whether to forward to GEO-2 satellite", and the corresponding processing operation is performed.

[0134] (2) For the application scenario of receiving inter-satellite signals from the neighboring primary satellite GEO-1 from satellite GEO-2, the inter-satellite signals of GEO-1 are demodulated using UQPSK, and then the signals are converted accordingly. Figure 10 The conditional statement branch "Is there a GEO-1 satellite telemetry and control signal?" is changed to "Is there a GEO-2 satellite telemetry and control signal?", and the corresponding processing operation is performed. Other conditional statements and processing methods are the same. Figure 10 .

[0135] (3) For the application scenario of receiving inter-satellite signals from the neighboring satellite GEO-3 from satellite GEO-2, UQPSK demodulation is performed on the inter-satellite signals of GEO-3. In addition to changing the conditional judgment branch to "whether there are telemetry and control signals from GEO-2 satellite", it is also necessary to... Figure 10 The conditional branch "whether to forward to GEO-3 satellite" is changed to "whether to forward to GEO-1 satellite", and the corresponding processing operation is performed.

[0136] In this embodiment, for the application scenario where satellite GEO-3 receives inter-satellite signals from neighboring satellite GEO-2 or primary satellite GEO-1, the processing method is similar to that described above, and will not be repeated in this embodiment.

[0137] The signal processing method provided in this invention first identifies the type of signal to be processed from the target GEO satellite. Then, if the signal to be processed is a first signal, and the first signal includes communication signals and telemetry and control signals, the communication signals and telemetry and control signals are orthogonally modulated to obtain a modulated signal. If the signal to be processed is a second signal, and the second signal includes a modulated signal, the modulated signal is orthogonally demodulated. Finally, the modulated signal or demodulated signal is forwarded to other GEO satellites according to the target mission requirements. This method can integrate communication and telemetry and control signals for information processing, improves the signal system integration, and thus improves the utilization rate of transmission channels and power resources.

[0138] In some embodiments, quadrature modulation of the communication signal and the measurement and control signal to obtain the modulated signal includes: modulating the communication signal in the in-phase branch using UQPSK to obtain the modulated communication signal, and modulating the measurement and control signal in the quadrature branch to obtain the modulated measurement and control signal; the average power of the modulated communication signal and the modulated measurement and control signal is the same.

[0139] In this embodiment, the communication signal and the measurement and control signal are modulated together and transmitted using the UQPSK method; the specific modulation parameters are designed as shown in the parameter designs (a) to (f) above, and will not be repeated in this embodiment.

[0140] In this embodiment, the signals transmitted from the first GEO satellite to the second GEO satellite include communication signals and telemetry and control signals; wherein, the communication signals This can be expressed by the following formula:

[0141] ;

[0142] Measurement and control signals This can be expressed by the following formula:

[0143]

[0144] in, and Belongs to NRZ-S code, symbol period , ; k Multiples, High level It is a negative voltage level.

[0145] Modulated signal after UQPSK modulation This can be expressed by the following formula:

[0146] ;

[0147] in, For carrier frequency, The in-phase modulation factor, It is an orthogonal modulation factor. It is a complex unit.

[0148] The second signal received by the second GEO satellite Including the above-mentioned modulated signal, it is represented as:

[0149] ;

[0150] in, and Multiplicative noise interference on the transmission channel, acting on... Q Luhe I On the road; It is the equivalent additive noise interference on the transmission channel, which acts on the entire received signal.

[0151] The signal demodulation unit on the second GEO satellite demodulates the received modulated signal to obtain the demodulated communication signal. Demodulated measurement and control signals , is represented as:

[0152] ;

[0153] ;

[0154] in, The in-phase demodulation factor has the same frequency as the in-phase modulation factor, and the phase difference between the modulation and demodulation carriers is constant. , It is the quadrature demodulation factor, with the same frequency as the quadrature modulation factor, but with a constant phase difference. , and The constant value of the demodulated signal power coefficient is determined by the residual noise (multiplicative noise, additive noise) of various transmission channels and the constant phase difference. These factors contribute to the formation of the signal; after demodulation by UQPSK, the original communication signal can be restored without distortion. and measurement and control signals .

[0155] Taking a satellite communication inter-satellite transmission signal system including GEO-1 as the master satellite and GEO-2 and GEO-3 as an example, GEO-1 is the master satellite, and GEO-2 and GEO-3 are two slave satellites. The communication signals and telemetry and control signals of GEO-1 are modulated by UQPSK and then sent to GEO-2 and distributed to GEO-3 through the inter-satellite signal path, respectively. For slave satellites GEO-2 or GEO-3, they can also be sent to GEO-1 and distributed to GEO-3 or GEO-2 through the inter-satellite signal path.

[0156] The signal processing method provided in this embodiment of the invention modulates the communication signal in the in-phase branch using UQPSK mode to obtain the modulated communication signal, and modulates the telemetry and control signal in the quadrature branch to obtain the modulated telemetry and control signal. The modulated communication signal and the modulated telemetry and control signal have the same average power, which expands the inter-satellite signal transmission scenario and further improves the transmission channel and power resources.

[0157] In some embodiments, the inter-satellite signal path includes an intra-network inter-satellite signal path and an inter-network inter-satellite signal path; the multiple GEO satellites include multiple satellite constellations, each constellation including one master GEO satellite and at least two slave GEO satellites; for the same satellite constellation, any two adjacent GEO satellites transmit a first signal or a second signal through an intra-network inter-satellite signal path; for any two adjacent satellite constellations, the first signal or the second signal is transmitted through an inter-network inter-satellite signal path between two adjacent but different slave GEO satellites.

[0158] In this example, the number of GEO satellites in each group of satellite communication inter-satellite transmission signal systems, the intra-network inter-satellite signal paths between adjacent satellites, and the types of signals to be transmitted and the signal modulation and demodulation methods corresponding to the intra-network inter-satellite signal paths and inter-network inter-satellite signal paths are as follows: Figures 1 to 5 As shown in the corresponding embodiment, this embodiment will not be described again.

[0159] In one specific embodiment, multiple GEO satellites are grouped. For example, GROUP-1 may contain 3 satellites, and GROUP-5 may contain a maximum of 7 satellites. When the number of satellites in a group exceeds 3, the signal system architecture can remain unchanged. This can be achieved by expanding the number of branching paths in the inter-satellite signal processing method to correspond to the number of satellites in the group, and expanding the "whether to forward to other satellites" branch in the inter-satellite signal processing method to cover all satellites in the corresponding group. Furthermore, communication signals and telemetry and control signals of all satellites in both groups can be transmitted through inter-network inter-satellite signal paths, thereby realizing inter-satellite communication data transmission between all dozens of satellites in the entire network.

[0160] The signal processing method provided in this invention establishes communication links between different groups of satellite communication inter-satellite transmission signal systems through inter-network and inter-satellite signal paths, and realizes full-chain communication for satellite communication inter-satellite transmission signal systems in the same or different groups, thereby improving the integration and scalability of the signal system and thus improving the efficiency and flexibility of satellite communication inter-satellite transmission signals.

[0161] Figure 11 This is a schematic diagram of the structure of the electronic device provided by the present invention, such as... Figure 11 As shown, the electronic device may include: a processor 1110, a communications interface 1120, a memory 1130, and a communication bus 1140, wherein the processor 1110, the communications interface 1120, and the memory 1130 communicate with each other through the communication bus 1140. The processor 1110 can call logical instructions in the memory 1130 to execute a signal processing method, which includes: confirming the type of signal to be processed from the target GEO satellite; wherein the target GEO satellite is at least one of multiple geostationary orbit GEO satellites; there are two inter-satellite signal paths between any two adjacent first and second GEO satellites among the multiple GEO satellites; one inter-satellite signal path is used for the first GEO satellite to send a first signal to the second GEO satellite, and the other inter-satellite signal path is used for the first GEO satellite to receive a second signal sent by the second GEO satellite; the first signal and the second signal are communication signals, respectively. The signal to be processed is at least one of a communication signal, a telemetry and control signal, and a modulation signal; if the signal to be processed is a first signal, and the first signal includes a communication signal and a telemetry and control signal, the communication signal and the telemetry and control signal are orthogonally modulated to obtain a modulated signal; if the signal to be processed is a second signal, and the second signal includes a modulated signal, the modulated signal is orthogonally demodulated to obtain a demodulated signal; wherein the in-phase orthogonal modulation factor used in the orthogonal modulation is the same as the in-phase orthogonal demodulation factor used in the orthogonal demodulation; the modulated signal or the demodulated signal is forwarded to other GEO satellites according to the target mission requirements, and the other GEO satellites are at least one of M geostationary orbit GEO satellites.

[0162] Furthermore, the logical instructions in the aforementioned memory 1130 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, essentially, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0163] On the other hand, the present invention also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer is able to execute the signal processing method provided by the above-described methods. The method includes: confirming the type of signal to be processed from a target GEO satellite; wherein the target GEO satellite is at least one of a plurality of geostationary orbit GEO satellites; there are two inter-satellite signal paths between any two adjacent first and second GEO satellites among the plurality of GEO satellites; one inter-satellite signal path is used for the first GEO satellite to send a first signal to the second GEO satellite, and the other inter-satellite signal path is used for the first GEO satellite... The system receives a second signal transmitted by a second GEO satellite; the first signal and the second signal are at least one of a communication signal, a telemetry and control signal, and a modulation signal, respectively; when the signal to be processed is the first signal, and the first signal includes both a communication signal and a telemetry and control signal, the communication signal and the telemetry and control signal are orthogonally modulated to obtain a modulated signal; when the signal to be processed is the second signal, and the second signal includes a modulated signal, the modulated signal is orthogonally demodulated to obtain a demodulated signal; wherein the in-phase orthogonal modulation factor used in the orthogonal modulation is the same as the in-phase orthogonal demodulation factor used in the orthogonal demodulation; the modulated signal or the demodulated signal is forwarded to other GEO satellites according to the target mission requirements, and the other GEO satellites are at least one of M geostationary orbit GEO satellites.

[0164] In another aspect, the present invention also provides a non-transitory computer-readable storage medium storing a computer program thereon, which, when executed by a processor, is implemented to perform the signal processing methods provided by the above methods. The method includes: identifying the type of signal to be processed from a target GEO satellite; wherein the target GEO satellite is at least one of a plurality of geostationary orbit GEO satellites; two inter-satellite signal paths exist between any two adjacent first and second GEO satellites among the plurality of GEO satellites; one inter-satellite signal path is used for the first GEO satellite to transmit a first signal to the second GEO satellite, and the other inter-satellite signal path is used for the first GEO satellite to receive a second signal transmitted by the second GEO satellite. The first signal and the second signal are at least one of a communication signal, a telemetry and control signal, and a modulation signal, respectively. When the signal to be processed is the first signal, and the first signal includes both a communication signal and a telemetry and control signal, the communication signal and the telemetry and control signal are orthogonally modulated to obtain a modulated signal. When the signal to be processed is the second signal, and the second signal includes a modulated signal, the modulated signal is orthogonally demodulated to obtain a demodulated signal. The in-phase orthogonal modulation factor used in the orthogonal modulation is the same as the in-phase orthogonal demodulation factor used in the orthogonal demodulation. The modulated signal or the demodulated signal is forwarded to other GEO satellites according to the target mission requirements. The other GEO satellites are at least one of M geostationary orbit GEO satellites.

[0165] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0166] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0167] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A system for inter-satellite transmission of signals in a satellite communication system, characterized by The system comprises: M geostationary earth orbit (GEO) satellites, M signal modulation units and M signal demodulation units; each GEO satellite is respectively provided with one signal modulation unit and one signal demodulation unit; M is a positive integer greater than 2; There are two inter-satellite signal paths between any adjacent first GEO satellite and second GEO satellite in the M GEO satellites; one of the inter-satellite signal paths is used for the first GEO satellite to send a first signal to the second GEO satellite, and the other inter-satellite signal path is used for the first GEO satellite to receive a second signal sent by the second GEO satellite; the first signal comprises at least one of a communication signal, a measurement and control signal and a modulation signal; the second signal comprises at least one of a communication signal, a measurement and control signal and a modulation signal; the first GEO satellite and the second GEO satellite are in field of view; Each signal modulation unit is configured to perform quadrature modulation on the communication signal and the measurement and control signal to obtain the modulation signal when the first signal comprises the communication signal and the measurement and control signal; The communication signal is represented by the following equation: ； The measurement and control signal is represented by the following formula: ； The communication signal The measurement and control signal Belongs to NRZ-S code, symbol period , ; k is a multiple, High level, Negative level; The orthogonal modulation is UQPSK modulation, and the modulated signal after UQPSK modulation is represented by the following formula: ； wherein is the carrier frequency, is the in-phase modulation factor, is the quadrature modulation factor, is the complex unit; Each signal demodulation unit is configured to perform quadrature demodulation on the modulation signal to obtain a demodulation signal when the second signal comprises the modulation signal; wherein the second signal including the modulated signal, denoted as: ； wherein, and is a multiplicative noise interference on the transmission channel, acting on the Q and I paths, respectively; is an equivalent additive noise interference on the transmission channel, acting on the whole received signal; The demodulated signal includes a demodulated communication signal and a demodulated TT&C signal and is expressed as: ； ； wherein, is an in-phase demodulation factor, and has the same frequency as the in-phase modulation factor, the phase of the modulation and demodulation carrier differing by a constant , is a quadrature demodulation factor, and has the same frequency as the quadrature modulation factor, the phase of the modulation and demodulation carrier differing by a constant , and is a constant signal power coefficient after demodulation; The in-phase quadrature modulation factor used in the quadrature modulation is the same as the in-phase quadrature demodulation factor used in the quadrature demodulation; The system further comprises: M ground measurement and control stations; different GEO satellites are connected to different ground measurement and control stations; Each ground measurement and control station is configured to transmit the measurement and control signal to the GEO satellite through a transmitter and an antenna feeder to realize tracking measurement, telemetry and remote control on a spacecraft; The signal modulation unit modulates the communication signal on the in-phase branch to obtain a modulated communication signal and modulates the measurement and control signal on the quadrature branch to obtain a modulated measurement and control signal in a UQPSK manner; the average power of the modulated communication signal and the modulated measurement and control signal is the same; The communication signal and the measurement and control signal of the first GEO satellite and the communication signal and the measurement and control signal of the second GEO satellite all adopt the same UQPSK modulation manner and demodulation manner.

2. A signal system, characterized by The system comprises: Multiple groups of the satellite communication inter-satellite transmission signal system according to claim 1; The satellite communication inter-satellite transmission signal system further comprises: M ground measurement and control stations; different GEO satellites are connected to different ground measurement and control stations; Each ground measurement and control station is configured to transmit the measurement and control signal to the GEO satellite through a transmitter and an antenna feeder to realize tracking measurement, telemetry and remote control on a spacecraft; The satellite communication inter-satellite transmission signal system modulates the communication signal on the in-phase branch to obtain a modulated communication signal and modulates the measurement and control signal on the quadrature branch to obtain a modulated measurement and control signal in a UQPSK manner; the average power of the modulated communication signal and the modulated measurement and control signal is the same; The communication signal and the measurement and control signal of the first GEO satellite and the communication signal and the measurement and control signal of the second GEO satellite all adopt the same UQPSK modulation manner and demodulation manner. Each of the inter-satellite transmission signal systems of the same group of satellites comprises one master GEO satellite and at least two slave GEO satellites; The inter-satellite signal paths comprise intra-network inter-satellite signal paths and inter-network inter-satellite signal paths; For the inter-satellite transmission signal systems of the same group of satellites, the first signal or the second signal is transmitted between any two adjacent GEO satellites through the intra-network inter-satellite signal path; For any two adjacent groups of satellite inter-satellite transmission signal systems, the first signal or the second signal is transmitted through the inter-network inter-satellite signal path between two slave GEO satellites of adjacent and different groups.

3. A signal processing method, characterized by, Comprise Confirm the type of the to-be-processed signal of a target GEO satellite; the target GEO satellite is at least one of a plurality of geostationary earth orbit GEO satellites; there are two inter-satellite signal paths between any two adjacent first GEO satellite and second GEO satellite of the plurality of GEO satellites; one of the inter-satellite signal paths is used for the first GEO satellite to send a first signal to the second GEO satellite, and the other inter-satellite signal path is used for the first GEO satellite to receive a second signal sent by the second GEO satellite; the first signal and the second signal are at least one of communication signals, measurement and control signals, and modulation signals; In the case that the to-be-processed signal is the first signal and the first signal comprises communication signals and measurement and control signals, the communication signals and the measurement and control signals are quadrature modulated to obtain the modulation signal; in the case that the to-be-processed signal is the second signal and the second signal comprises modulation signals, the modulation signals are quadrature demodulated to obtain demodulated signals; the in-phase quadrature modulation factor used in the quadrature modulation is the same as the in-phase quadrature demodulation factor used in the quadrature demodulation; the measurement and control signals are obtained by a plurality of ground measurement and control stations through a transmitter and an antenna feeder to a GEO satellite; different GEO satellites are connected to different ground measurement and control stations; The modulation signal or the demodulated signal is forwarded to other GEO satellites according to target task requirements; the other GEO satellites are at least one of the plurality of GEO satellites; The quadrature modulation of the communication signals and the measurement and control signals to obtain the modulation signal comprises: The communication signals are modulated in the in-phase branch in the UQPSK mode to obtain modulated communication signals, and the measurement and control signals are modulated in the quadrature branch to obtain modulated measurement and control signals; the average power of the modulated communication signals and the modulated measurement and control signals is the same; The communication signals and the measurement and control signals of the first GEO satellite and the communication signals and the measurement and control signals of the second GEO satellite adopt the same UQPSK modulation mode and demodulation mode; Among them, the communication signal is represented by the following formula: ； The measurement and control signal is represented by the following formula: ； Wherein, the communication signal , the measurement and control signal Belongs to NRZ-S code, symbol period , ; k is a multiple, High level, Negative level; modulated signal after uqpsk modulation is expressed by the following equation: ； wherein is the carrier frequency, is the in-phase modulation factor, is the quadrature modulation factor, is the complex unit; wherein the second signal comprising the modulated signal, denoted as: ； wherein, and is a multiplicative noise interference on the transmission channel, acting on the Q and I paths, respectively; is an equivalent additive noise interference on the transmission channel, acting on the whole received signal; The demodulated signal includes a demodulated communication signal and a demodulated TT&C signal is expressed as: ； ； wherein is the in-phase demodulation factor, and has the same frequency as the in-phase modulation factor, the phase of the modulation and demodulation carrier differing by a constant , is the quadrature demodulation factor, and has the same frequency as the quadrature modulation factor, the phase differing by a constant , and is the constant of the demodulated signal power coefficient.

4. The signal processing method of claim 3, wherein, The inter-satellite signal paths comprise intra-network inter-satellite signal paths and inter-network inter-satellite signal paths; the plurality of GEO satellites comprise a plurality of satellite groups, each satellite group comprising one master GEO satellite and at least two slave GEO satellites; For the same satellite group, the first signal or the second signal is transmitted between any two adjacent GEO satellites through the intra-network inter-satellite signal path; For any two adjacent groups of satellite constellations, a first signal or a second signal is transmitted through an inter-network inter-satellite signal path between two adjacent and different GEO satellites.

5. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, The computer program is executed by the processor to implement the signal processing method according to any one of claims 3-4.

6. A non-transitory computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to implement the signal processing method according to any one of claims 3-4.

Images