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

Abstract

The invention relates to the technical field of satellite communication, and provides a satellite communication inter-satellite signal transmission system, a signal system and a signal processing method, the satellite communication inter-satellite signal transmission system comprises M GEO satellites, M signal modulation units and M signal demodulation units; each GEO satellite comprises a signal modulation unit and a signal demodulation unit; two inter-satellite signal channels exist between any two adjacent satellites in the M GEO satellites; one path is used for sending a first signal, and the other path is used for receiving a second signal; the signal modulation unit is used for carrying out orthogonal modulation on the communication signal and the measurement and control signal; and the signal demodulation unit is used for carrying out orthogonal demodulation on the modulation signal. According to the system, the universality and interchangeability of the system structure are improved, the signal system can carry out integrated information processing on communication and measurement and control signals, the integration degree of the signal system is improved, and the utilization rate of transmission channels and power resources is further improved.

Description

Technical Field

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

[0002] The satellite communication constellation system composed of multiple synchronous orbit communication satellites (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 with each other (between any two satellites), that is, it can support inter-satellite communication.

[0003] The signals transmitted by the intersatellite communication system can be roughly divided into two types according to the types of business and services transmitted: communication data signals of satellite payload transponders and measurement and control operation signals of satellite platforms, referred to as communication signals and measurement and control signals.

[0004] In the related technologies, in the field of inter-satellite communication information transmission, a "split and independent" transmission design signal system is usually adopted, that is, two independent physical transmission channels are used to transmit communication signals and measurement and control signals respectively. This system sets up a wide variety of on-board communication equipment, which is heavy and consumes a lot of power, and cannot meet the development needs of miniaturization and integration of on-board 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 between single-machine modules on the satellite and low integration, which is not conducive to the effective utilization of transmission channels and power resources. Summary of the invention

[0005] The present invention provides a satellite communication inter-satellite transmission signal system, a signal system and a signal processing method, so as to solve the defects of the inter-satellite communication signal system designed in the prior art, such as complex structure, large system weight and power consumption, poor coupling between on-board single-machine modules, low integration, and low utilization of transmission channels and power resources, and realize the integrated processing of inter-satellite communication signals and measurement and control signals of satellite constellations.

[0006] The present invention provides a satellite communication inter-satellite transmission signal system, comprising: M geostationary orbit (GEO) satellites, M signal modulation units and M signal demodulation units; wherein each GEO satellite is provided with a signal modulation unit and a 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 among 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 includes at least one of a communication signal, a measurement and control signal, and a modulation signal; the second signal includes 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 visible in the field of view; Each signal modulation unit is used for performing orthogonal modulation on the communication signal and the measurement and control signal to obtain the modulated signal when the first signal includes the communication signal and the measurement and control signal; Each signal demodulation unit is used for performing orthogonal demodulation on the modulated signal to obtain a demodulated signal when the second signal includes a modulated 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.

[0007] According to a satellite communication inter-satellite transmission signal system provided by the present invention, the signal modulation unit adopts UQPSK method 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 orthogonal 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.

[0008] According to a satellite communication inter-satellite transmission signal system provided by the present invention, the system further includes: M ground tracking and control stations; different GEO satellites are connected to different ground tracking and control stations.

[0009] The present invention also provides a signal system, comprising: A plurality of groups of said satellite communication inter-satellite transmission signal systems; Each satellite communication inter-satellite transmission signal system includes one master GEO satellite and at least two slave GEO satellites; The inter-satellite signal pathway includes the intra-network inter-satellite signal pathway and the inter-network inter-satellite signal pathway; For the same group of satellite communication inter-satellite transmission signal systems, any two adjacent GEO satellites transmit the first signal or the second signal through the inter-satellite signal path within the network; For any two adjacent groups of satellite communication inter-satellite transmission signal systems, the first signal or the second signal is transmitted through the inter-network inter-satellite signal path between two adjacent and different groups of slave GEO satellites.

[0010] The present invention also provides a signal processing method, comprising: Confirm the type of the signal to be processed of the 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 adjacent first GEO satellite and second GEO satellite among the plurality of GEO satellites; wherein 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 respectively at least one of a communication signal, a measurement and control signal, and a modulation signal; 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 orthogonally 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 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 target mission requirements, and the other GEO satellite is at least one of the multiple GEO satellites.

[0011] According to a signal processing method provided by the present invention, performing orthogonal modulation on the communication signal and the measurement and control signal to obtain the modulated signal comprises: The communication signal is modulated in the in-phase branch using the UQPSK method to obtain a modulated communication signal, and the measurement and control signal is modulated in the orthogonal branch to obtain a modulated measurement and control signal; the modulated communication signal and the modulated measurement and control signal have the same average power.

[0012] 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; the multiple GEO satellites include multiple groups of satellite clusters, each group of satellite clusters includes one master GEO satellite and at least two slave GEO satellites; For the same group of satellites, any two adjacent GEO satellites transmit the first signal or the second signal through the inter-satellite signal path within the network; For any two adjacent groups of satellite groups, the first signal or the second signal is transmitted through an inter-network inter-satellite signal path between two adjacent and different groups of slave GEO satellites.

[0013] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements any of the above-mentioned signal processing methods when executing the computer program.

[0014] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, and the computer program, when executed by a processor, implements any of the signal processing methods described above.

[0015] The present invention also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the signal processing method described above is implemented.

[0016] The satellite communication inter-satellite transmission signal system, signal system and signal processing method provided by the present invention have two inter-satellite signal paths between any two adjacent GEO satellites among multiple GEO satellites, wherein one inter-satellite signal path is used to send a first signal, and the other inter-satellite signal path is used to receive a second signal sent by a second GEO satellite. A signal modulation unit is set on each GEO satellite for orthogonally modulating the communication signal and the measurement and control signal when the first signal includes the communication signal and the measurement and control signal, and a signal demodulation unit is set for orthogonally demodulating the modulated signal when the second signal includes the modulated signal. The system structure has a high degree of modularization, which improves the versatility and interchangeability of the system structure. The signal system can perform integrated information processing on the communication and measurement and control signals, thereby improving the integration of the signal system and thereby improving the utilization rate of the transmission channel and power resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is one of the structural schematic diagrams of the satellite communication inter-satellite transmission signal system provided by the present invention.

[0019] Figure 2 This is the second structural schematic diagram of the satellite communication inter-satellite transmission signal system provided by the present invention.

[0020] Figure 3 This is the third structural schematic diagram of the satellite communication inter-satellite transmission signal system provided by the present invention.

[0021] Figure 4 It is one of the flow charts of the signal processing method provided by the present invention.

[0022] Figure 5 This is the second flowchart of the signal processing method provided by the present invention.

[0023] Figure 6This is the fourth structural schematic diagram of the satellite communication inter-satellite transmission signal system provided by the present invention.

[0024] Figure 7 It is one of the structural schematic diagrams of the signal system provided by the present invention.

[0025] Figure 8 This is the second structural schematic diagram of the signal system provided by the present invention.

[0026] Fig. 9 This is the third flowchart of the signal processing method provided by the present invention.

[0027] Fig.10 This is the fourth flowchart of the signal processing method provided by the present invention.

[0028] Fig.11 It is a structural schematic diagram of the electronic device provided by the present invention.

[0029] Reference numerals: 100: Satellite communication intersatellite transmission signal system; 110: GEO satellite; 111: signal modulation unit; 112: signal demodulation unit; 120: ground measurement and control station. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Combine the following Figure 1-Figure 10 The present invention describes the satellite communication inter-satellite transmission signal system, signal system and signal processing method.

[0032] Figure 1 FIG. 1 is one of the structural schematic diagrams of the satellite communication intersatellite transmission signal system provided by the present invention, such as Figure 1 As shown, the satellite communication inter-satellite transmission signal system 100 includes: M geostationary orbit GEO satellites 110, M signal modulation units 111 and M signal demodulation units 112.

[0033] Each GEO satellite 110 is provided with a signal modulation unit 111 and a signal demodulation unit 112 ; M is a positive integer greater than 2.

[0034] 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; wherein the GEO-1 satellite is the master satellite of the constellation system, referred to as the master satellite, and the GEO-2 and GEO-3 satellites are two adjacent satellites of the GEO-1 satellite, located on the west and east sides of the GEO-1 satellite respectively, and are slave satellites of the constellation system, referred to as slave satellites. The constellation configuration adopts a typical three-star equally spaced arrangement design, that is, any two stars are 120 degrees apart.

[0035] In some embodiments, the satellite communication inter-satellite transmission signal system 100 may further include a master GEO satellite 110 and a plurality of slave GEO satellites 110 .

[0036] In this embodiment, each GEO satellite 110 is equipped with at least one signal modulation unit 111. When transmitting a signal to be modulated, the signal is modulated according to a target modulation type to obtain a modulated signal.

[0037] In this embodiment, the target modulation type includes unbalanced quadrature phase keying (UQPSK), quadrature phase shift keying (QPSK), modulation AM, frequency modulation FM, phase modulation PM or other modulation modes.

[0038] 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 a demodulated signal.

[0039] There are two inter-satellite signal paths between any adjacent first GEO satellite and second GEO satellite among the M GEO satellites 110; 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 includes at least one of a communication signal, a measurement and control signal, and a modulation signal; the second signal includes at least one of a communication signal, a measurement and control signal, and a modulation signal; and the first GEO satellite and the second GEO satellite are visible in the field of view.

[0040] Take a satellite communication inter-satellite transmission signal system 100 including three GEO satellites 110 (i.e., M=3) as an example, where GEO-1 is a 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 the 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.

[0041] Figure 2 This is the second structural diagram of the satellite communication intersatellite transmission signal system provided by the present invention. Figure 2 In the illustrated embodiment, the satellite communication inter-satellite transmission signal system 100 further includes: M ground measurement and control stations 120 ; different GEO satellites 110 are connected to different ground measurement and control stations 120 .

[0042] In this embodiment, the ground tracking and control station 120 can directly track, measure, telemeter and remotely control the spacecraft. Specifically, the functions of the ground tracking and control station 120 include the following aspects: (1) Tracking and measurement: Through equipment such as transmitters and antenna feeders, the ground tracking and control station 120 accurately tracks and measures the spacecraft to obtain key parameters such as the spacecraft's position and speed; (2) Telemetry: Collect various data of the spacecraft's in-orbit operation, such as temperature, pressure, and power, and transmit these data back to the ground control center; (3) Remote control: Control the spacecraft according to the instructions of the ground control center, such as adjusting its attitude and performing specific tasks; (4) Communication: Maintain uninterrupted communication between the spacecraft and the ground control center to ensure that instructions and data can be transmitted in real time.

[0043] Figure 3 This is the third structural diagram of the satellite communication intersatellite transmission signal system provided by the present invention. Figure 3 In the embodiment shown, the design of the interfaces of various signals (including communication signals and measurement and control signals, the same below) is as follows: (01) The signal from the main GEO-1 satellite is sent to the corresponding ground station.

[0044] (02) The signal from the slave GEO-2 satellite is sent to the master GEO-1 satellite for reception via the inter-satellite signal path [S21].

[0045] (03) The signal from the master GEO-1 satellite is forwarded to the slave GEO-2 satellite through the inter-satellite signal path [S12].

[0046] (04) The signal from the master GEO-1 satellite is forwarded (distributed) to the slave GEO-3 satellite through the inter-satellite signal path [S13].

[0047] (05) The signal from the slave GEO-3 satellite is sent to the master GEO-1 satellite for reception via the inter-satellite signal path [S31].

[0048] (06) The signal from the GEO-2 satellite is forwarded to the main satellite GEO-1 through the inter-satellite signal path [S21].

[0049] (07) The signal from the master GEO-1 satellite is sent to the slave GEO-2 satellite via the inter-satellite signal path [S12].

[0050] (08) The signal from the slave GEO-3 satellite is sent to the slave GEO-2 satellite via the inter-satellite signal path [S32].

[0051] (09) The signal from the GEO-2 satellite is forwarded (distributed) to the GEO-3 satellite via the inter-satellite signal path [S23].

[0052] (10) The signal from the GEO-2 satellite is sent to the corresponding ground station.

[0053] (11) The signal from the GEO-3 satellite is forwarded to the main satellite GEO-1 through the inter-satellite signal path [S31].

[0054] (12) The signal from the master GEO-1 satellite is sent to the slave GEO-3 satellite via the inter-satellite signal path [S13].

[0055] (13) The signal from the GEO-3 satellite is forwarded (distributed) to the GEO-2 satellite via the inter-satellite signal path [S32].

[0056] (14) The signal from the slave GEO-2 satellite is sent to the slave GEO-3 satellite via the inter-satellite signal path [S23].

[0057] (15) The signal from the GEO-3 satellite is sent to the corresponding ground station.

[0058] exist Figure 1 In the illustrated embodiment, each signal modulation unit 111 is used to perform orthogonal modulation on the communication signal and the measurement and control signal to obtain a modulated signal when the first signal includes the communication signal and the measurement and control signal.

[0059] In this embodiment, the first signal may include one or more of a communication signal, a measurement and control signal, or a modulation signal. When the first signal includes a communication signal and a measurement and control signal, the communication signal and the measurement and control signal are orthogonally modulated according to a specified modulation format by a signal modulation unit 111 set on the current GEO satellite 110 to obtain a modulated signal, thereby realizing the modulation of the communication signal and the measurement and control signal together for transmission.

[0060] exist Figure 1 In the illustrated embodiment, each signal demodulation unit 112 is configured to perform orthogonal demodulation on the modulated signal to obtain a demodulated signal when the second signal includes a modulated signal.

[0061] In this embodiment, the second signal may also include one or more of a communication signal, a measurement and control signal, or a modulation signal. When the second signal includes a modulation signal, the communication signal and the measurement 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 modulated signal, thereby realizing the modulation of the communication signal and the measurement and control signal together for transmission.

[0062] In this embodiment, 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, and the average powers (root mean square values) of the two types of signals after the orthogonal modulation are the same.

[0063] The satellite communication inter-satellite transmission signal system provided by the embodiment of the present invention has two inter-satellite signal paths between any two adjacent GEO satellites among multiple GEO satellites, wherein one inter-satellite signal path is used to send a first signal, and the other inter-satellite signal path is used to receive a second signal sent by a second GEO satellite. A signal modulation unit is set on each GEO satellite for orthogonally modulating the communication signal and the measurement and control signal when the first signal includes the communication signal and the measurement and control signal, and a signal demodulation unit is set for orthogonally demodulating the modulated signal when the second signal includes the modulated signal. The system structure has a high degree of modularization, which improves the versatility and interchangeability of the system structure. The signal system can perform integrated information processing on the communication and measurement and control signals, thereby improving the integration of the signal system and thereby improving the utilization rate of the transmission channel and power resources.

[0064] In some embodiments, the signal modulation unit uses UQPSK to modulate the communication signal in the in-phase branch to obtain a modulated communication signal, and modulates the measurement and control signal in the orthogonal branch to obtain a modulated measurement and control signal; the average power of the modulated communication signal and the modulated measurement and control signal is the same.

[0065] Figure 4 is one of the flow charts of the signal processing method provided by the present invention. Figure 4 In the embodiment shown, the communication signal and the measurement and control signal are modulated together for transmission using the UQPSK method (corresponding to [3]), and then up-converted, amplified and transmitted. The specific modulation parameters are designed as follows: (a) Design the same phase ( The modulation signal on the branch (for example, the communication signal is modulated on the same phase ( On the branch, the modulation rate (corresponding to the modulation code rate) can be designed as =20Mbps, corresponding to [1]; (b) Design orthogonal ( Q For example, the measurement and control signal is modulated on the orthogonal ( QOn the branch, the modulation rate (corresponding to the modulation code rate) can be designed as R Q =1Mbps, corresponding to [2]; (c) Design the measurement and control signal information rate, which is generally 1~4kbps. This rate is adjusted to a modulation rate of 1Mbps through the code rate; (d) The two rates satisfy the relationship: ; (e) Luhe Q The average power (RMS value) of the signal after modulation is the same; (f) The same set of in-phase and quadrature modulation factors (corresponding to in-phase and quadrature function modulation factors) and demodulation factors are used in modulation and demodulation.

[0066] It should be noted that the parameters selected in (a), (b) and (c) above are typical values ​​for reference only. Modulate the measurement and control signal on the road Q modulate the communication signal on the road; in addition, the communication signal rate Relatively high, generally no more than 100Mbps, the measurement and control signal rate R Q Relatively low, generally not exceeding 10Mbps; the multiple relationship between the two rates mentioned in (d) can be determined based on the actual design situation.

[0067] In this embodiment, the communication signal and the measurement and control signal in each GEO satellite adopt the same UQPSK modulation and demodulation mode.

[0068] exist Figure 4 In the embodiment shown, the signal sent by the first GEO satellite to the second GEO satellite includes a communication signal and a tracking and control signal; wherein the communication signal It is expressed by the following formula: ; Measurement and control signal It is expressed by the following formula:

[0069] in, and Belongs to NRZ-S code, code element period , ; is a multiple, is high level, It is a negative level.

[0070] The second GEO satellite (receiving front end) receives the signal and combines the low-frequency signal determined by frequency synthesis with the received signal for down-conversion processing (corresponding to [4]), and then performs UQPSK modulation on the down-converted signal to obtain the modulated signal , expressed by the following formula: ; in, is the carrier frequency, is the in-phase modulation factor, is the quadrature modulation factor, A plural unit.

[0071] Second signal received by second GEO satellite Including the above modulation signal, it is expressed as: ; in, and is the multiplicative noise interference on the transmission channel, acting on Q Luhe On the road; It is the equivalent additive noise interference on the transmission channel, which acts on the received signal as a whole.

[0072] The signal demodulation unit on the second GEO satellite demodulates the received modulated signal to obtain a demodulated communication signal. (corresponding to [5]) and the demodulated measurement and control signal (corresponding to [6]), expressed as: ; ; in, is the in-phase demodulation factor, which has the same frequency as the in-phase modulation factor, and the phase difference between the modulation and demodulation carrier is constant. , is the orthogonal demodulation factor, which has the same frequency as the orthogonal modulation factor and a constant phase difference , and is the power coefficient constant of the demodulated signal, which is composed of the residual noise (multiplicative noise, additive noise) of various transmission channels and the phase difference constant After UQPSK demodulation, the original communication signal can be restored without distortion. and measurement and control signals .

[0073] Figure 5 This is the second flow chart of the signal processing method provided by the present invention. Figure 5In the embodiment shown, taking the master satellite GEO-1 as an example, the communication signal and the tracking and control signal in the satellite are modulated by UQPSK and sent to GEO-2 and distributed to GEO-3 through the inter-satellite signal path respectively; for the slave satellite GEO-2 or GEO-3, Figure 5 Correspondingly, it will be sent to GEO-1 through the inter-satellite signal path and distributed to GEO-3 or GEO-2.

[0074] Since the processing method for sending and receiving inter-satellite signals by the signal system of the present invention has good versatility and interchangeability, it is not only convenient for system integration, but also conducive to 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.

[0075] Figure 6 This is a fourth structural diagram of the satellite communication intersatellite transmission signal system provided by the present invention. Figure 6 In the illustrated embodiment, six satellites are divided into two groups, with three satellites in each group forming a small network for inter-satellite signal communication. GEO-1, GEO-2 and GEO-3 form one network, with GEO-1 being the master satellite and the other two being slave satellites; GEO-4, GEO-5 and GEO-6 form another network, with GEO-6 being the master satellite and the other two being slave satellites; the two networks can be operated independently of each other, and the communication and measurement and control signals of all six satellites between the two networks can be transmitted through the inter-network and inter-satellite signal path between GEO-2 and GEO-4, or between GEO-3 and GEO-5.

[0076] The satellite communication inter-satellite transmission signal system provided by the embodiment of the present invention adopts the UQPSK method to modulate the communication signal in the in-phase branch through the signal modulation unit to obtain a modulated communication signal, and modulates the measurement and control signal in the orthogonal branch to obtain a modulated measurement and control signal; the average power of the modulated communication signal and the modulated measurement and control signal are the same, which expands the satellite inter-satellite signal transmission scenario and further improves the transmission channel and power resources.

[0077] It should be noted that for more complex application scenarios, the number of satellites may be as many as dozens. At this time, dozens of satellites can be divided into 3 to 5 satellite groups based on the constellation configuration and orbital position. Each group consists of a main satellite and several slave satellites.

[0078] The signal system provided by the present invention is described below. The signal system described below and the satellite communication inter-satellite transmission signal system described above can be referenced to each other.

[0079] Figure 7It is one of the structural diagrams of the signal system provided by the present invention, such as Figure 7 As shown, the signal system includes: multiple groups of satellite communication inter-satellite transmission signal systems 100; wherein each group of satellite communication inter-satellite transmission signal systems 100 includes one master GEO satellite and at least two slave GEO satellites; the inter-satellite signal path includes an intra-network inter-satellite signal path and an inter-network inter-satellite signal path; for the same group of satellite communication inter-satellite transmission signal systems, any two adjacent GEO satellites transmit the first signal or the second signal through the intra-network inter-satellite signal path; for any two adjacent groups of satellite communication inter-satellite transmission signal systems, the first signal or the second signal is transmitted through the inter-network inter-satellite signal path between two adjacent and different groups of slave GEO satellites.

[0080] 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 the 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 in detail.

[0081] Figure 8 This is the second structural diagram of the signal system provided by the present invention. Figure 8 In the illustrated embodiment, the number of satellites in the GROUP-1 group is 3, and the number of satellites in the GROUP-5 group is at most 7; when the number of satellites in a group exceeds 3, the signal system architecture can remain unchanged, and it is only necessary to expand the number of branches in the signal system's inter-satellite signal processing method to the number of slave satellites in the corresponding 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, the communication signals and measurement and control signals of all satellites in the two groups can be transmitted between each adjacent two groups through the inter-network inter-satellite signal path, thereby realizing inter-satellite communication data transmission between all dozens of satellites in the entire network.

[0082] The signal system provided by the embodiment of the present invention establishes communication links for different groups of satellite communication inter-satellite transmission signal systems through inter-network inter-satellite signal paths, and realizes full-link communication for the same group or different groups of satellite communication inter-satellite transmission signal systems, thereby further improving the integration and scalability of the signal system, and further improving the efficiency and flexibility of satellite communication inter-satellite transmission signals.

[0083] The signal processing method provided by the present invention is described below. The signal processing method described below and the satellite communication inter-satellite transmission signal system described above can be referred to each other.

[0084] Fig. 9 FIG. 3 is a flow chart of the signal processing method provided by the present invention. Fig. 9As shown, the signal processing method comprises the following steps: Step 910: confirm the type of the signal to be processed of the 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 adjacent first GEO satellite and second GEO satellite among 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 a communication signal, a measurement and control signal, and a modulation signal, respectively.

[0085] In this embodiment, the satellite communication inter-satellite transmission signal system may further include a master GEO satellite and a plurality of slave GEO satellites, wherein the target GEO satellite belongs to the master GEO satellite or the slave GEO satellite.

[0086] In this embodiment, the first GEO satellite and the second GEO satellite are visible in the field of view.

[0087] 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, perform orthogonal modulation on the communication signal and the measurement and control signal to obtain a modulated signal; when the signal to be processed is a second signal, and the second signal includes a modulated signal, perform orthogonal demodulation on the modulated signal 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.

[0088] In this embodiment, each GEO satellite is equipped with at least one signal modulation unit. When transmitting a signal to be modulated, the signal is modulated according to a target modulation type to obtain a modulated signal.

[0089] In this embodiment, the modulation type may be unbalanced quadrature phase keying (UQPSK), quadrature phase shift keying (QPSK), or other modulation modes.

[0090] In this embodiment, each GEO satellite is equipped with at least one signal demodulation unit, which demodulates the signal according to the target modulation type when receiving a modulated signal to obtain a demodulated signal.

[0091] Take a satellite communication inter-satellite transmission signal system including three GEO satellites (i.e. M=3) as an example, where GEO-1 is the master satellite, GEO-2 and GEO-3 are two slave satellites, and the number of inter-satellite signal paths between any two GEO satellites in the 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.

[0092] In this embodiment, the signal modulation unit uses UQPSK to modulate the communication signal in the in-phase branch to obtain a modulated communication signal, and modulates the measurement and control signal in the orthogonal branch to obtain a modulated measurement and control signal; the average power of the modulated communication signal and the modulated measurement and control signal is the same.

[0093] In this embodiment, the satellite communication inter-satellite transmission signal system further includes: M ground measurement and control stations; different GEO satellites are connected to different ground measurement and control stations.

[0094] Step 930: forward the modulated signal or the demodulated signal to other GEO satellites according to target mission requirements, where the other GEO satellite is at least one of the multiple GEO satellites.

[0095] Fig.10 FIG. 4 is a flow chart of the signal processing method provided by the present invention. Fig.10 In the embodiment shown, taking the example of the master satellite GEO-1 receiving the inter-satellite signal from the adjacent slave satellite GEO-2, the signal is first demodulated by UQPSK to restore the communication signal and the measurement and control signal; then, according to the specific task requirements of the satellite in-orbit operation to transmit the communication signal, which are generally divided into two categories: "satellite-to-ground transmission task requirements" and "inter-satellite transmission task requirements", it is determined whether the communication signal needs to be sent to the GEO-3 satellite through the inter-satellite signal path. If necessary, it is sent to the slave satellite GEO-3 satellite; if not, it is sent to the ground station. The measurement and control signal needs to be analyzed and identified to determine whether it contains the measurement and control signal of the local satellite GEO-1 satellite. If so, it is sent to the measurement and control signal processing unit of the local satellite for further identification and processing; if not, according to the specific task requirements of the satellite in-orbit operation to transmit the measurement and control signal, it is determined whether the measurement and control signal needs to be forwarded to the GEO-3 satellite through the inter-satellite signal path. If necessary, it is sent to the slave satellite GEO-3 satellite; if not, the measurement and control signal data is directly discarded.

[0096] In this embodiment, the intersatellite communication scenarios can be divided into the following situations: (1) For the application scenario where the master satellite GEO-1 receives the inter-satellite signal from the adjacent slave satellite GEO-3, the inter-satellite signal of GEO-3 is first demodulated by UQPSK, and then Fig.10 The conditional judgment 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.

[0097] (2) For the application scenario where the slave satellite GEO-2 receives the inter-satellite signal from the adjacent master satellite GEO-1, the inter-satellite signal of GEO-1 is demodulated by UQPSK, and then the Fig.10 The conditional judgment branch "whether there is a GEO-1 satellite tracking signal" is changed to "whether there is a GEO-2 satellite tracking signal", and the corresponding processing operation is performed. The other conditional judgment branches and processing methods are the same Fig.10 .

[0098] (3) For the application scenario where the slave satellite GEO-2 receives the inter-satellite signal from the adjacent slave satellite GEO-3, UQPSK demodulation of the inter-satellite signal of GEO-3 is performed. In addition to changing the conditional judgment branch to "whether there is a tracking and control signal from the GEO-2 satellite", Fig.10 The conditional judgment 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.

[0099] In this embodiment, for the application scenario where the slave satellite GEO-3 receives the inter-satellite signal from the adjacent slave satellite GEO-2 or the master satellite GEO-1, the processing method is similar to the above, and this embodiment will not be repeated.

[0100] The signal processing method provided by the embodiment of the present invention first confirms the type of the signal to be processed of the target GEO satellite, and then, when the signal to be processed is the first signal and the first signal includes the communication signal and the measurement and control signal, orthogonally modulates the communication signal and the measurement and control signal to obtain a modulated signal; when the signal to be processed is the second signal and the second signal includes the modulated signal, orthogonally demodulates the modulated signal, and finally forwards the modulated signal or the demodulated signal to other GEO satellites according to the target mission requirements. The communication and measurement and control signals can be integrated for information processing, thereby improving the integration of the signal system and further improving the utilization rate of the transmission channel and power resources.

[0101] In some embodiments, orthogonal modulation is performed on the communication signal and the measurement and control signal to obtain the modulated signal, including: using UQPSK to modulate the communication signal in the in-phase branch to obtain a modulated communication signal, and modulating the measurement and control signal in the orthogonal branch to obtain a modulated measurement and control signal; the average power of the modulated communication signal and the modulated measurement and control signal are the same.

[0102] In this embodiment, the communication signal and the measurement and control signal are modulated together and transmitted using the UQPSK method; the specific modulation parameter designs are shown in the above parameter designs (a) to (f), which will not be repeated in this embodiment.

[0103] In this embodiment, the signal sent by the first GEO satellite to the second GEO satellite includes a communication signal and a tracking and control signal; wherein the communication signal It is expressed by the following formula: ; Measurement and control signal It is expressed by the following formula:

[0104] in, and Belongs to NRZ-S code, code element period , ; is a multiple, is high level, It is a negative level.

[0105] The modulated signal after UQPSK modulation It is expressed by the following formula: ; in, is the carrier frequency, is the in-phase modulation factor, is the quadrature modulation factor, A plural unit.

[0106] Second signal received by second GEO satellite Including the above modulation signal, it is expressed as: ; in, and is the multiplicative noise interference on the transmission channel, acting on Q Luhe On the road; It is the equivalent additive noise interference on the transmission channel, which acts on the received signal as a whole.

[0107] The signal demodulation unit on the second GEO satellite demodulates the received modulated signal to obtain a demodulated communication signal. And the demodulated measurement and control signal , expressed as: ; ; in, is the in-phase demodulation factor, which has the same frequency as the in-phase modulation factor, and the phase difference between the modulation and demodulation carrier is constant. , is the orthogonal demodulation factor, which has the same frequency as the orthogonal modulation factor and a constant phase difference , and is the power coefficient constant of the demodulated signal, which is composed of the residual noise (multiplicative noise, additive noise) of various transmission channels and the phase difference constant After UQPSK demodulation, the original communication signal can be restored without distortion. and measurement and control signals .

[0108] Take a satellite communication inter-satellite transmission signal system as an example, including GEO-1 as the master satellite, GEO-2 and GEO-3, where GEO-1 is the master satellite, and GEO-2 and GEO-3 are two slave satellites. The communication signal and tracking and control signal 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 the slave satellites GEO-2 or GEO-3, they can also be sent to GEO-1 through the inter-satellite signal path and distributed to GEO-3 or GEO-2.

[0109] The signal processing method provided in the embodiment of the present invention adopts the UQPSK method to modulate the communication signal in the in-phase branch through the signal modulation unit to obtain a modulated communication signal, and modulates the measurement and control signal in the orthogonal branch to obtain a modulated measurement and control signal; the average power of the modulated communication signal and the modulated measurement and control signal are the same, which expands the inter-satellite signal transmission scenario and further improves the transmission channel and power resources.

[0110] 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 groups of satellite clusters, each group of satellite clusters includes 1 master GEO satellite and at least two slave GEO satellites; for the same group of satellite clusters, any two adjacent GEO satellites transmit the first signal or the second signal through the intra-network inter-satellite signal path; for any two adjacent groups of satellite clusters, the first signal or the second signal is transmitted through the inter-network inter-satellite signal path between two adjacent and different groups of slave GEO satellites.

[0111] 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 the 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 in detail.

[0112] In a specific embodiment, multiple GEO satellites are grouped. For example, the number of satellites in satellite group GROUP-1 is set to 3, and the number of satellites in GROUP-5 is set to a maximum of 7. 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 branches in the signal system's inter-satellite signal processing method to the number of slave satellites in the corresponding 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, the communication signals and measurement 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.

[0113] The signal processing method provided by the embodiment of the present invention establishes communication links of different groups of satellite communication inter-satellite transmission signal systems through inter-network inter-satellite signal paths, and realizes full-link communication for the same group or different groups of satellite communication inter-satellite transmission signal systems, thereby further improving the signal system integration and system scalability, and further improving the efficiency and flexibility of satellite communication inter-satellite transmission signals.

[0114] Fig.11 is a schematic diagram of the structure of the electronic device provided by the present invention, such as Fig.11As shown, the electronic device may include: a processor 1110, a communications interface 1120, a memory 1130 and a communications bus 1140, wherein the processor 1110, the communications interface 1120 and the memory 1130 communicate with each other through the communications bus 1140. The processor 1110 may call the logic instructions in the memory 1130 to execute a signal processing method, the method comprising: confirming the type of the signal to be processed of the 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 adjacent first GEO satellite and second GEO satellite among the plurality of GEO satellites; wherein 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. At least one of a communication signal, a measurement and control signal and a modulation signal; 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 orthogonally modulated to obtain a modulation signal; when the signal to be processed is a second signal, and the second signal includes a modulation signal, the modulation 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; and the modulated signal or the demodulated signal is forwarded to other GEO satellites according to target mission requirements, and the other GEO satellite is at least one of M geostationary orbit GEO satellites.

[0115] In addition, the logic instructions in the above-mentioned memory 1130 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0116] On the other hand, the present invention further provides a computer program product, the computer program product includes a computer program, the computer program can be stored on a non-transitory computer-readable storage medium, when the computer program is executed by a processor, the computer can execute the signal processing method provided by the above methods, the method comprising: confirming the type of the signal to be processed of the 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 adjacent first GEO satellite and second GEO satellite among the plurality of GEO satellites; wherein 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 send a first signal to the second GEO satellite Receive a second signal sent by a second GEO satellite; the first signal and the second signal are respectively at least one of a communication signal, a measurement and control signal, and a modulation signal; when the signal to be processed is the first signal, and the first signal includes the communication signal and the measurement and control signal, perform orthogonal modulation on the communication signal and the measurement and control signal to obtain a modulated signal; when the signal to be processed is the second signal, and the second signal includes the modulation signal, perform orthogonal demodulation on the modulated signal 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; forward the modulated signal or the demodulated signal to other GEO satellites according to the target mission requirements, and the other GEO satellite is at least one of the M geostationary orbit GEO satellites.

[0117] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which is implemented when the computer program is executed by a processor to execute the signal processing method provided by the above-mentioned methods, the method comprising: confirming the type of the signal to be processed by the 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 adjacent first GEO satellite and second GEO satellite among the plurality of GEO satellites; wherein 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 signal; the first signal and the second signal are at least one of a communication signal, a measurement and control signal and a modulation signal respectively; when the signal to be processed is the first signal, and the first signal includes the communication signal and the measurement and control signal, the communication signal and the measurement 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 the modulation 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 satellite is at least one of the M geostationary orbit GEO satellites.

[0118] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0119] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0120] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A satellite communication inter-satellite transmission signal system, characterized in that: include: M geostationary orbit GEO satellites, M signal modulation units and M signal demodulation units; wherein each GEO satellite is respectively provided with a signal modulation unit and a 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 among 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 includes at least one of a communication signal, a measurement and control signal, and a modulation signal; the second signal includes 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 visible in the field of view; Each signal modulation unit is used for performing orthogonal modulation on the communication signal and the measurement and control signal to obtain the modulated signal when the first signal includes the communication signal and the measurement and control signal; Each signal demodulation unit is used for performing orthogonal demodulation on the modulated signal to obtain a demodulated signal when the second signal includes a modulated 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.

2. The satellite communication inter-satellite transmission signal system according to claim 1, characterized in that: The signal modulation unit adopts UQPSK method 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 orthogonal 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.

3. The satellite communication inter-satellite transmission signal system according to claim 1, characterized in that: The system further comprises: M ground tracking and control stations; different GEO satellites are connected to different ground tracking and control stations.

4. A signal system, characterized in that: include: A plurality of satellite communication inter-satellite transmission signal systems as claimed in any one of claims 1 to 3; Each satellite communication inter-satellite transmission signal system includes one master GEO satellite and at least two slave GEO satellites; The inter-satellite signal pathway includes the intra-network inter-satellite signal pathway and the inter-network inter-satellite signal pathway; For the same group of satellite communication inter-satellite transmission signal systems, any two adjacent GEO satellites transmit the first signal or the second signal through the inter-satellite signal path within the network; For any two adjacent groups of satellite communication inter-satellite transmission signal systems, the first signal or the second signal is transmitted through the inter-network inter-satellite signal path between two adjacent and different groups of slave GEO satellites.

5. A signal processing method, characterized in that: include Confirm the type of the signal to be processed of the 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 adjacent first GEO satellite and second GEO satellite among the plurality of GEO satellites; wherein 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 respectively at least one of a communication signal, a measurement and control signal, and a modulation signal; 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 orthogonally 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 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 target mission requirements, and the other GEO satellite is at least one of the multiple GEO satellites.

6. The signal processing method according to claim 5, characterized in that: The performing orthogonal modulation on the communication signal and the measurement and control signal to obtain the modulated signal comprises: The communication signal is modulated in the in-phase branch using the UQPSK method to obtain a modulated communication signal, and the measurement and control signal is modulated in the orthogonal branch to obtain a modulated measurement and control signal; the modulated communication signal and the modulated measurement and control signal have the same average power.

7. The signal processing method according to claim 5, characterized in that: 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 groups of satellite clusters, each group of satellite clusters includes one master GEO satellite and at least two slave GEO satellites; For the same group of satellites, any two adjacent GEO satellites transmit the first signal or the second signal through the intra-network inter-satellite signal path; For any two adjacent groups of satellite groups, the first signal or the second signal is transmitted through an inter-network inter-satellite signal path between two adjacent and different groups of slave GEO satellites.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the signal processing method according to any one of claims 5 to 7 is implemented.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the signal processing method according to any one of claims 5 to 7 is implemented.

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