Slave satellite signal processing device and inter-satellite communication system

Abstract

The invention provides a slave satellite signal processing device and an inter-satellite communication system, the slave satellite signal processing device is deployed on a first slave satellite of the inter-satellite communication system, and the slave satellite signal processing device comprises a channel power distribution module, a signal modulation module, a signal demodulation module and a channel demultiplexing module; the channel power distribution module performs power distribution on the transponder signal and sends an obtained power distribution signal to the signal modulation module; the signal modulation module performs unbalanced four-phase keying modulation on the power distribution signal and the composite signal, and sends a radio frequency signal based on the obtained modulation signal; the signal demodulation module performs unbalanced four-phase keying demodulation on radio frequency signals from other satellites, sends an obtained I-path signal to a ground station, and sends an obtained Q-path signal to the channel demultiplexing module; and the channel demultiplexing module decomposes the Q paths of signals and processes the decomposed signals. Therefore, integrated transmission of inter-satellite communication and measurement and control signals is achieved, the module integration degree is high, the flexibility is high, and the cost is low.

Description

Technical Field

[0001] The present invention relates to the technical field of satellite communications, and in particular to a slave satellite signal processing device and an inter-satellite communication system. Background Art

[0002] The satellite communication constellation system, composed of multiple geostationary Earth Orbit Satellite (GEO) communication satellites, has the characteristics of wide coverage area and support for inter-satellite communication.

[0003] Signals transmitted in intersatellite communications can be broadly divided into two types, depending on the type of service being transmitted: communication data signals and measurement and control signals. Currently, most intersatellite communication information transmission systems, both domestically and internationally, employ a discrete transmission design, using two independent physical transmission channels to transmit communication data signals and measurement and control signals. This design results in a wide variety of onboard communication equipment, heavy weight, and high power consumption, which does not meet the development goals of miniaturized and integrated onboard equipment. Furthermore, the separation of communication and measurement and control signals, lacking a unified processing method, also violates the development goals of satellite electronic information fusion. This results in poor coupling between onboard modules, low integration, and inflexible information distribution.

[0004] Therefore, there is an urgent need for an advanced system with high integration and strong flexibility that can meet the needs of integrated development of satellite electronic information. Summary of the Invention

[0005] The present invention provides a satellite signal processing device and an inter-satellite communication system, which are used to solve the defects of poor coupling between on-board modules, low integration, and inflexible information distribution in the prior art of inter-satellite communication, and realize the integrated transmission of inter-satellite communication and measurement and control signals, with high module integration, strong flexibility and low cost.

[0006] The present invention provides a slave satellite signal processing device, which is deployed on a first slave satellite of an inter-satellite communication system and includes the following modules: Channel power allocation module, signal modulation module, signal demodulation module and channel demultiplexing module; The channel power allocation module is configured to perform power allocation on the transponder signal of the first slave satellite to obtain a power allocation signal, and send the power allocation signal to the signal modulation module; The signal modulation module is configured to perform unbalanced quadrature phase keying modulation on the power allocation signal and the composite signal to obtain a modulated signal, and transmit a radio frequency signal to a master satellite or a second slave satellite of the intersatellite communication system based on the modulated signal; wherein the composite signal is multiplexed by a telemetry data packet of the first slave satellite and a remote control data packet of the master satellite or the second slave satellite; The signal demodulation module is used to perform unbalanced quadrature phase keying demodulation on the radio frequency signal from the master satellite or the second slave satellite to obtain an I-channel signal and a Q-channel signal, send the I-channel signal to the ground station, and send the Q-channel signal to the channel demultiplexing module; The channel demultiplexing module is used to decompose the Q-channel signal and process the decomposed signal.

[0007] According to a slave satellite signal processing device provided by the present invention, the slave satellite signal processing device further includes a channel switching switch; The signal modulation module is further configured to send a radio frequency signal to the channel switch based on the modulation signal; The channel switching switch is used to determine whether to send the radio frequency signal to the second slave satellite or to discard the radio frequency signal according to a control instruction of the ground station.

[0008] According to a slave satellite signal processing device provided by the present invention, the channel demultiplexing module is specifically configured to: Decomposing the Q-channel signal to extract a remote control data packet of the first slave satellite, a remote control data packet of the second slave satellite, and a telemetry data packet of the master satellite; The remote control data packet of the first slave satellite is sent to the first slave satellite for remote control information processing; the remote control data packet of the second slave satellite is discarded; and the telemetry data packet of the master satellite is sent to the channel switching switch.

[0009] According to a slave satellite signal processing device provided by the present invention, the channel demultiplexing module is specifically configured to: Decomposing the Q-channel signal to extract a remote control data packet of the first slave satellite, a remote control data packet of the master satellite, and a telemetry data packet of the second slave satellite; The remote control data packet of the first slave satellite is sent to the first slave satellite for remote control information processing; the remote control data packet of the master satellite is discarded; and the telemetry data packet of the second slave satellite is sent to the channel switching switch.

[0010] According to a slave satellite signal processing device provided by the present invention, the channel switching switch is further used to: According to a control instruction of the ground station, it is determined whether to send the telemetry data packet of the master satellite or the telemetry data packet of the second slave satellite to the ground station, or to discard the telemetry data packet of the master satellite or the telemetry data packet of the second slave satellite.

[0011] According to a slave satellite signal processing device provided by the present invention, the transponder signal is a communication broadcast data service signal with a code rate of 20 Mbps.

[0012] According to a slave satellite signal processing device provided by the present invention, the composite signal is a signal that complies with the 1553B standard serial port transmission rate of 1 Mbps.

[0013] According to a slave satellite signal processing device provided by the present invention, the telemetry data packet of the first slave satellite is a measurement and control system signal with a code rate of 4kbps.

[0014] According to a slave satellite signal processing device provided by the present invention, the remote control data packet of the master satellite or the second slave satellite is a measurement and control system signal with a code rate of 1 kbps.

[0015] The present invention also provides an inter-satellite communication system, comprising a master satellite and a plurality of slave satellites adjacent to the master satellite; at least one of the plurality of slave satellites is deployed with any of the above-described slave satellite signal processing devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to 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 any creative work.

[0017] Figure 1 This is one of the structural diagrams of the slave satellite signal processing device provided by the present invention.

[0018] Figure 2 This is the second structural diagram of the slave satellite signal processing device provided by the present invention.

[0019] Figure 3 This is the third structural diagram of the slave satellite signal processing device provided by the present invention.

[0020] Figure 4 It is a structural diagram of the intersatellite communication system provided by the present invention.

[0021] Figure 5 The diagram is a structural diagram of a slave satellite signal processing module of the inter-satellite communication system provided by the present invention. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0023] Figure 1 This is one of the structural diagrams of the slave satellite signal processing device provided by the present invention, such as Figure 1 As shown, the slave satellite signal processing device 100 is deployed on the first slave satellite of the inter-satellite communication system and includes the following modules: Channel power allocation module 110, signal modulation module 120, signal demodulation module 130 and channel demultiplexing module 140; The channel power allocation module 110 is configured to allocate power to the transponder signal of the first slave satellite to obtain a power allocation signal, and send the power allocation signal to the signal modulation module 120; The signal modulation module 120 is configured to perform unbalanced quadrature phase keying modulation on the power allocation signal and the composite signal to obtain a modulated signal, and transmit a radio frequency signal to a master satellite or a second slave satellite of the intersatellite communication system based on the modulated signal; wherein the composite signal is multiplexed by a telemetry data packet of the first slave satellite and a remote control data packet of the master satellite or the second slave satellite; The signal demodulation module 130 is configured to perform unbalanced quadrature phase keying (UBP) demodulation on the radio frequency signal from the master satellite or the second slave satellite to obtain an I-channel signal and a Q-channel signal, and send the I-channel signal to the ground station and the Q-channel signal to the channel demultiplexing module 140; The channel demultiplexing module 140 is used to decompose the Q-channel signal and process the decomposed signal.

[0024] Specifically, the inter-satellite communication system provided by an embodiment of the present invention includes a master satellite and multiple slave satellites, wherein the first slave satellite refers to any one of the multiple slave satellites, and the second slave satellite refers to any one of the multiple slave satellites except the first slave satellite.

[0025] The inter-satellite signal processing device 100 provided in an embodiment of the present invention is deployed on the first slave satellite of the inter-satellite communication system. Its core functional modules include a channel power allocation module 110 , a signal modulation module 120 , a signal demodulation module 130 and a channel demultiplexing module 140 .

[0026] The channel power allocation module 110 may perform power management on the transponder signal of the first slave satellite to achieve reasonable power allocation.

[0027] According to a slave satellite signal processing device provided by the present invention, the transponder signal is a communication broadcast data service signal with a code rate of 20 Mbps.

[0028] After generating a power allocation signal according to the transponder signal of the first slave satellite, the channel power allocation module 110 may transmit the power allocation signal to the signal modulation module 120 .

[0029] It can be understood that the power allocation signal includes at least two signals, which, after being transmitted to the signal modulation module 120 , can be used for signal modulation of the relevant signals of the master satellite and the second slave satellite respectively.

[0030] The signal modulation module 120 can perform unbalanced quadrature phase shift keying (DBPSK) modulation on the received power allocation signal and the composite signal, and then transmit the radio frequency signal to the primary satellite or the second slave satellite in the intersatellite communication system based on the modulated signal to achieve efficient data transmission across the satellite communication link.

[0031] The composite signal is formed by multiplexing the telemetry data packet of the first slave satellite and the remote control data packet of the master satellite; or, the composite signal is formed by multiplexing the telemetry data packet of the first slave satellite and the remote control data packet of the second slave satellite.

[0032] According to a slave satellite signal processing device provided by the present invention, the composite signal is a signal that complies with the 1553B standard serial port transmission rate of 1 Mbps.

[0033] According to a slave satellite signal processing device provided by the present invention, the telemetry data packet of the first slave satellite is a measurement and control system signal with a code rate of 4kbps.

[0034] According to a slave satellite signal processing device provided by the present invention, the remote control data packet of the master satellite or the second slave satellite is a measurement and control system signal with a code rate of 1 kbps.

[0035] It can be understood that, when the composite signal is multiplexed by the telemetry data packet of the first slave satellite and the remote control data packet of the master satellite, the signal modulation module 120 can send the modulated signal as a radio frequency (RF) signal to the RF receiving front end of the master satellite in the inter-satellite communication system; when the composite signal is multiplexed by the telemetry data packet of the first slave satellite and the remote control data packet of the second slave satellite, the signal modulation module 120 can recombine the modulated signal into the RF signal of the first slave satellite and send it to the RF receiving front end of the second slave satellite in the inter-satellite communication system.

[0036] The first slave satellite can receive radio frequency signals from the master satellite or the second slave satellite, and the signal demodulation module 130 in the slave satellite signal processing device can demodulate the radio frequency signals from the master satellite or the second slave satellite, using unbalanced quadrature phase keying (UQ) demodulation to obtain an I-channel signal and a Q-channel signal, respectively. The signal demodulation module 130 can send the I-channel signal to a ground station (GS) and transmit the Q-channel signal to the channel demultiplexing module 140 for further signal processing.

[0037] When the signal demodulation module 130 demodulates the RF signal from the main satellite, the I-channel signal obtained by the unbalanced quadrature phase keying demodulation of the signal demodulation module 130 is the transponder signal of the main satellite, and the Q-channel signal is the composite data packet signal sent by the main satellite.

[0038] When the signal demodulation module 130 demodulates the RF signal from the second slave satellite, the I-channel signal obtained by the unbalanced quadrature phase keying demodulation of the signal demodulation module 130 is the transponder signal of the second slave satellite, and the Q-channel signal is the composite data packet signal sent by the second slave satellite.

[0039] The main function of the channel demultiplexing module 140 is to decompose the Q-channel signal sent by the signal demodulation module 130 and then process the decomposed signal, for example, sending the required signal and discarding the unnecessary signal.

[0040] The slave satellite signal processing device provided by the present invention is deployed on the first slave satellite of an inter-satellite communication system. The channel power distribution module of the slave satellite signal processing device distributes power to the transponder signal of the first slave satellite and sends the obtained power distribution signal to the signal modulation module; the signal modulation module performs unbalanced four-phase keying modulation on the power distribution signal and the composite signal, and sends a radio frequency signal based on the obtained modulated signal; the signal demodulation module performs unbalanced four-phase keying demodulation on the radio frequency signals from other satellites, sends the obtained I-channel signal to the ground station, and sends the obtained Q-channel signal to the channel demultiplexing module; the channel demultiplexing module decomposes the Q-channel signal and processes the decomposed signals. In this way, the integrated transmission of inter-satellite communication and measurement and control signals is realized, and the module has high module integration, strong flexibility, and low cost.

[0041] Figure 2 This is the second structural diagram of the satellite signal processing device provided by the present invention, as shown in FIG. Figure 2 As shown, according to a slave satellite signal processing device provided by the present invention, the slave satellite signal processing device further includes a channel switching switch 150; The signal modulation module 120 is further configured to send a radio frequency signal to the channel switch 150 based on the modulation signal; The channel switching switch 150 is used to determine whether to send the radio frequency signal to the second slave satellite or to discard the radio frequency signal according to a control instruction of the ground station.

[0042] Specifically, the slave satellite signal processing device according to the embodiment of the present invention may further include a channel switching switch 150 .

[0043] When the composite signal is multiplexed by the telemetry data packet of the first slave satellite and the remote control data packet of the second slave satellite, the signal modulation module 120 can transmit the generated RF signal to the channel switching switch 150 after completing the modulation, so as to prepare for the subsequent signal routing selection.

[0044] The channel switch 150 can determine the signal transmission path according to the control instructions issued by the ground station. The control instructions of the ground station can adjust the operation of the channel switch in real time to respond to dynamic communication needs or changes in network status.

[0045] After receiving the control instruction from the ground station, the channel switching switch 150 can choose to forward the RF signal to the second slave satellite to ensure signal transmission within the inter-satellite communication system; or in specific circumstances, discard the signal according to the control strategy, thereby avoiding unnecessary interference or network load and improving the communication efficiency of the system.

[0046] Figure 3 This is the third structural diagram of the satellite signal processing device provided by the present invention, as shown in FIG. Figure 3 As shown, according to a satellite signal processing device provided by the present invention, the channel demultiplexing module 140 is specifically used to: Decomposing the Q-channel signal to extract a remote control data packet of the first slave satellite, a remote control data packet of the second slave satellite, and a telemetry data packet of the master satellite; The remote control data packet of the first slave satellite is sent to the first slave satellite for remote control information processing; the remote control data packet of the second slave satellite is discarded; and the telemetry data packet of the master satellite is sent to the channel switching switch 150.

[0047] Specifically, the channel demultiplexing module 140 can extract and distinguish various types of data packets during the process of decomposing the Q-channel signal.

[0048] When the signal demodulation module 130 demodulates the RF signal from the main satellite, the I-channel signal obtained by the unbalanced quadrature phase keying demodulation of the signal demodulation module 130 is the transponder signal of the main satellite, and the Q-channel signal is the composite data packet signal sent by the main satellite.

[0049] The channel demultiplexing module 140 decomposes the Q-channel signal to obtain a remote control data packet of the first slave satellite, a remote control data packet of the second slave satellite, and a telemetry data packet of the master satellite, thereby providing support for subsequent signal processing.

[0050] Then, the signal demultiplexing module 140 may process the remote control data packet.

[0051] For the remote control data packet of the first slave satellite, the signal demultiplexing module 140 can forward the remote control data packet of the first slave satellite to the first slave satellite for further remote control information processing to ensure that the first slave satellite effectively responds to the ground command.

[0052] For the remote control data packet of the second slave satellite, since the master satellite can directly distribute the remote control data packet to the second slave satellite through the inter-satellite link, for the purpose of system resource optimization, the signal demultiplexing module 140 can discard the remote control data packet of the second slave satellite to avoid unnecessary channel occupancy and interference.

[0053] For the telemetry data packets of the primary satellite, the signal demultiplexing module 140 can send the extracted telemetry data packets of the primary satellite to the channel switch 150. The channel switch processes and routes the telemetry data packets of the primary satellite according to the instructions of the ground station to ensure that the status information of the primary satellite can be effectively transmitted.

[0054] like Figure 3 As shown, according to a satellite signal processing device provided by the present invention, the channel demultiplexing module 140 is specifically used to: Decomposing the Q-channel signal to extract a remote control data packet of the first slave satellite, a remote control data packet of the master satellite, and a telemetry data packet of the second slave satellite; The remote control data packet of the first slave satellite is sent to the first slave satellite for remote control information processing; the remote control data packet of the master satellite is discarded; and the telemetry data packet of the second slave satellite is sent to the channel switching switch 150.

[0055] Specifically, the channel demultiplexing module 140 can extract and distinguish various types of data packets during the process of decomposing the Q-channel signal.

[0056] When the signal demodulation module 130 demodulates the RF signal from the second slave satellite, the I-channel signal obtained by the unbalanced quadrature phase keying demodulation of the signal demodulation module 130 is the transponder signal of the second slave satellite, and the Q-channel signal is the composite data packet signal sent by the second slave satellite.

[0057] The channel demultiplexing module 140 decomposes the Q-channel signal to obtain the remote control data packet of the first slave satellite, the remote control data packet of the master satellite, and the telemetry data packet of the second slave satellite, thereby providing support for subsequent signal processing.

[0058] Then, the signal demultiplexing module 140 may process the remote control data packet.

[0059] For the remote control data packet of the first slave satellite, the signal demultiplexing module 140 can forward the remote control data packet of the first slave satellite to the first slave satellite for further remote control information processing to ensure that the first slave satellite effectively responds to the ground command.

[0060] For the remote control data packet of the master satellite, since the second slave satellite can directly distribute the remote control data packet to the master satellite through the inter-satellite link, for the purpose of system resource optimization, the signal demultiplexing module 140 can discard the remote control data packet of the master satellite to avoid unnecessary channel occupation and interference.

[0061] For the telemetry data packets of the second slave satellite, the signal demultiplexing module 140 can send the extracted telemetry data packets of the second slave satellite to the channel switch 150. The channel switch processes and routes the telemetry data packets of the second slave satellite according to the instructions of the ground station to ensure that the status information of the second slave satellite can be effectively transmitted.

[0062] According to a slave satellite signal processing device provided by the present invention, the channel switching switch 150 is further configured to: According to a control instruction of the ground station, it is determined whether to send the telemetry data packet of the master satellite or the telemetry data packet of the second slave satellite to the ground station, or to discard the telemetry data packet of the master satellite or the telemetry data packet of the second slave satellite.

[0063] Specifically, the channel switching switch 150 provided by the present invention may also have a function of making routing decisions for telemetry data packets.

[0064] When the signal demultiplexing module 140 sends the extracted telemetry data packet of the main satellite to the channel switching switch 150, the channel switching switch 150 can make a decision on the transmission path of the telemetry data packet of the main satellite based on the control instruction of the ground station; when the signal demultiplexing module 140 sends the extracted telemetry data packet of the second slave satellite to the channel switching switch 150, the channel switching switch 150 can make a decision on the transmission path of the telemetry data packet of the second slave satellite based on the control instruction of the ground station.

[0065] The channel switching switch 150 can send the received telemetry data packets to the ground station according to the control instructions of the ground station to ensure that the ground station receives the required satellite telemetry data and realizes system monitoring; or, in specific circumstances, according to the control strategy of the ground station, the channel switching switch 150 can also discard the received telemetry data packets. This function helps to avoid the transmission of redundant data and reduce the load of the communication link, thereby optimizing the communication resource configuration and transmission efficiency of the satellite system.

[0066] Through the above functions, the channel switching switch 150 can flexibly adjust the transmission or discard path of the telemetry data, providing the ground station with a more selective and targeted satellite data transmission solution.

[0067] Figure 4 FIG. 1 is a schematic diagram of the structure of the intersatellite communication system provided by the present invention. Figure 4 As shown, the intersatellite communication system includes a master satellite 400 and a plurality of slave satellites ( Figure 4 Two slave satellites are used as an example, namely 410 and 420); at least one of the plurality of slave satellites is deployed with a slave satellite signal processing device 100 (described in any one of the above device embodiments) Figure 4 In the figure, a slave satellite signal processing device is deployed on the slave satellite 410 for illustration.

[0068] The inter-satellite communication system provided by the present invention adopts the same technical means as the above-mentioned embodiment of the slave satellite signal processing device and has the same technical effects as the above-mentioned embodiment of the slave satellite signal processing device. Therefore, the technical means adopted by the inter-satellite communication system and the technical effects achieved will not be described in detail.

[0069] The following further illustrates the slave satellite signal processing device provided by the present invention through embodiments in specific application scenarios. It should be noted that the slave satellite signal processing module of the inter-satellite communication system in the following embodiments can be understood as a more detailed embodiment of the slave satellite signal processing device provided by the present invention.

[0070] This embodiment integrates the communication and tracking signals of the three GEO satellites for signal processing and information transmission. The inter-satellite communication system on the GEO-2 satellite is used to implement unified management and real-time distribution processing of the communication and tracking signals of the three GEO satellites from the satellite signal processing module. By adopting standard communication interfaces, modulation, and demodulation specifications, the communication and tracking signal information is integrated, and information between the GEO-2 satellite and the GEO-1 and GEO-3 satellites is forwarded in an orderly manner, thereby improving the working efficiency of the signal processing module of the inter-satellite communication system.

[0071] Figure 5 FIG. 1 is a schematic diagram of the structure of the satellite signal processing module of the inter-satellite communication system provided by the present invention. Figure 5 As shown, the satellite signal processing module of the inter-satellite communication system described in this embodiment is composed of eight main functional modules and internal and external interfaces, including: Signal modulation module (UQPSK) - (7), (9); Signal demodulation module (DeUQPSK) - (14), (25); Channel demultiplexing module (DeMUX) - (16), (27); Channel power divider module (Power divider) - (4); Channel switching switches—(10), (20), (31); Internal interfaces—(5), (6), (15), (19), (26), (30); Input interfaces—(1), (2), (3), (13), (24); Output interfaces—(8), (11), (12), (17), (18), (21), (22), (23), (28), (29), (32), (33), (34).

[0072] The input signal of the input interface (1) comes from the transponder (PL) signal of the satellite (GEO-2), which is a communication broadcast data service signal with a code rate of 20Mbps. The channel power distribution module (4) is responsible for distributing the power of the signal of the input interface (1) and dividing it into two internal interfaces (5) and (6) for sending out respectively.

[0073] The input signal of the input interface (2) is a set of composite signals that conform to the 1553B standard serial port transmission rate of 1Mbps. The composite signal multiplexes the measurement and control system (TCR) signal from the satellite (GEO-2), including the telemetry data packet with a code rate of 4kbps; and the measurement and control system (TCR) signal from the main satellite (GEO-1), including the remote control data packet with a code rate of 1kbps.

[0074] The signal modulation module (7) is responsible for performing unbalanced four-phase keying modulation on the signal of the input interface (2) and the signal of the internal interface (5), and sending the modulated signal to the RF receiving front end RF of the main satellite (GEO-1) through the output interface (8) of the inter-satellite communication system signal processing module via the inter-satellite communication link.

[0075] The input signal of the input interface (3) is a set of composite signals that conform to the 1553B standard serial port transmission rate of 1Mbps. The composite signal multiplexes the measurement and control system (TCR) signal from the satellite (GEO-2), including the telemetry data packet with a code rate of 4kbps; and the measurement and control system (TCR) signal from the adjacent satellite (GEO-3), including the remote control data packet with a code rate of 1kbps.

[0076] The signal modulation module (9) is responsible for performing unbalanced quadrature keying modulation on the signal from the input interface (3) and the signal from the internal interface (6). The modulated signal is reassembled into the radio frequency signal GEO-2 RF of the current satellite (GEO-2), and sent to the channel switch (10) for selection: Option 1 - the signal is sent to the radio frequency receiving front end RF of the adjacent satellite (GEO-3) via the intersatellite communication link through the output interface (11) of the intersatellite communication system signal processing module; Option 2 - the signal is directly discarded (12). The channel switch's selection of the signal is determined by the ground station sending corresponding control instructions based on real-time conditions (the same below).

[0077] The input signal of the input interface (13) is a composite radio frequency signal from the main satellite (GEO-1). The signal is sent to the signal demodulation module (14) for unbalanced four-phase keying demodulation. The I-channel source data packet is demodulated, that is, the communication broadcast data service signal of the transponder of the GEO-1 satellite with a code rate of 20Mbps, and is forwarded to the ground station GS through the output interface (23) via this satellite; the Q-channel source data packet is demodulated, that is, the 1553B standard serial port transmission measurement and control composite data packet signal with a code rate of 1Mbps sent by the GEO-1 satellite, including the remote control data packet of the measurement and control system of this satellite (GEO-2) with a code rate of 1kbps; as well as the telemetry data packet of the measurement and control system of the main satellite (GEO-1) with a code rate of 4kbps and the remote control data packet of the measurement and control system of the adjacent satellite (GEO-3) with a code rate of 1kbps, and is sent as the internal interface (15).

[0078] The channel demultiplexing module (16) decomposes and extracts the remote control data packet of the measurement and control system of the local satellite (GEO-2) at a code rate of 1 kbps from the measurement and control composite data packet signal sent from the internal interface (15), and sends it to the local satellite (GEO-2) through the output interface (17) for remote control information processing; decomposes and extracts the remote control data packet of the measurement and control system of the GEO-3 satellite at a code rate of 1 kbps. Since the GEO-1 satellite can directly distribute the remote control data packet to the GEO-3 satellite through the intersatellite link, the remote control data packet extracted from the GEO-2 satellite is directly discarded (18); decomposes and extracts the telemetry data packet of the measurement and control system of the GEO-1 satellite at a code rate of 4 kbps (19), and sends it to the channel switching switch (20) for selection: selection 1 - forwarding it to the ground station GS through the output interface (21) via the local satellite; selection 2 - directly discarding the telemetry data packet (22).

[0079] The input signal of the input interface (24) is a composite radio frequency signal from an adjacent satellite (GEO-3). The signal is sent to the signal demodulation module (25) for unbalanced four-phase keying demodulation. The I-channel source data packet is demodulated, i.e., the communication broadcast data service signal of the transponder of the GEO-3 satellite with a code rate of 20Mbps. The signal is forwarded to the ground station GS via the output interface (34) via the satellite. The Q-channel source data packet is demodulated, i.e., the 1553B standard serial port transmission measurement and control composite data packet signal with a code rate of 1Mbps sent by the GEO-3 satellite, including the remote control data packet of the measurement and control system of the satellite (GEO-2) with a code rate of 1kbps; the remote control data packet of the measurement and control system of the main satellite (GEO-1) with a code rate of 1kbps and the telemetry data packet of the measurement and control system of the adjacent satellite (GEO-3) with a code rate of 4kbps. The data packet is sent as the internal interface (26).

[0080] The channel demultiplexing module (27) decomposes and extracts the remote control data packet of the measurement and control system of the local satellite (GEO-2) at a code rate of 1 kbps from the measurement and control composite data packet signal sent from the internal interface (26), and sends the data packet to the local satellite (GEO-2) through the output interface (28) for remote control information processing; decomposes and extracts the remote control data packet of the measurement and control system of the GEO-1 satellite at a code rate of 1 kbps. Since the GEO-3 satellite can directly distribute the remote control data packet to the GEO-1 satellite through the intersatellite link, the remote control data packet extracted from the GEO-2 satellite is directly discarded (29); decomposes and extracts the telemetry data packet of the measurement and control system of the GEO-3 satellite at a code rate of 4 kbps (30), and sends it to the channel switching switch (31) for selection: selection 1 - forwarding to the ground station GS through the output interface (32) via the local satellite; selection 2 - directly discarding the telemetry data packet (33).

[0081] The intersatellite communication system slave signal processing module described in the present invention is specifically designed for use with GEO-2, one of the three GEO satellites. Given that GEO-2 and GEO-3 share the same architecture and are functionally interchangeable, the present invention is also equally applicable to GEO-3.

[0082] It should be noted that the device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separate, and 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 may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art can understand and implement the present embodiment without inventive effort.

[0083] Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented using software plus a necessary general-purpose hardware platform, or of course, hardware. Based on this understanding, the essence of the above technical solution, or the portion 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, a magnetic disk, or an optical disk, and includes a number of instructions for causing a computer device (such as a personal computer, server, or network device) to execute the methods described in each embodiment or certain portions of the embodiments.

[0084] 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 various embodiments of the present invention.

Claims

1. A satellite signal processing device, characterized in that: Deployed on the first satellite of the intersatellite communication system, including: Channel power allocation module, signal modulation module, signal demodulation module and channel demultiplexing module; The channel power allocation module is configured to perform power allocation on the transponder signal of the first slave satellite to obtain a power allocation signal, and send the power allocation signal to the signal modulation module; The signal modulation module is configured to perform unbalanced quadrature phase keying modulation on the power allocation signal and the composite signal to obtain a modulated signal, and transmit a radio frequency signal to a master satellite or a second slave satellite of the intersatellite communication system based on the modulated signal; wherein the composite signal is multiplexed by a telemetry data packet of the first slave satellite and a remote control data packet of the master satellite or the second slave satellite; The signal demodulation module is used to perform unbalanced quadrature phase keying demodulation on the radio frequency signal from the master satellite or the second slave satellite to obtain an I-channel signal and a Q-channel signal, send the I-channel signal to the ground station, and send the Q-channel signal to the channel demultiplexing module; The channel demultiplexing module is used to decompose the Q-channel signal and process the decomposed signal.

2. The slave satellite signal processing device according to claim 1, characterized in that: The slave satellite signal processing device further includes a channel switching switch; The signal modulation module is further configured to send a radio frequency signal to the channel switch based on the modulation signal; The channel switching switch is used to determine whether to send the radio frequency signal to the second slave satellite or to discard the radio frequency signal according to a control instruction of the ground station.

3. The slave satellite signal processing device according to claim 2, characterized in that: The channel demultiplexing module is specifically used to: Decomposing the Q-channel signal to extract a remote control data packet of the first slave satellite, a remote control data packet of the second slave satellite, and a telemetry data packet of the master satellite; sending the remote control data packet of the first slave satellite to the first slave satellite for remote control information processing; discarding the remote control data packet of the second slave satellite; And, sending the telemetry data packet of the main satellite to the channel switching switch.

4. The slave satellite signal processing device according to claim 2, characterized in that: The channel demultiplexing module is specifically used to: Decomposing the Q-channel signal to extract a remote control data packet of the first slave satellite, a remote control data packet of the master satellite, and a telemetry data packet of the second slave satellite; sending the remote control data packet of the first slave satellite to the first slave satellite for remote control information processing; discarding the remote control data packet of the primary satellite; And, sending the telemetry data packet of the second slave satellite to the channel switching switch.

5. The slave satellite signal processing device according to claim 3 or 4, characterized in that: The channel switching switch is further used to: According to a control instruction of the ground station, it is determined whether to send the telemetry data packet of the master satellite or the telemetry data packet of the second slave satellite to the ground station, or to discard the telemetry data packet of the master satellite or the telemetry data packet of the second slave satellite.

6. The slave satellite signal processing device according to any one of claims 1 to 4, characterized in that: The repeater signal is a communication broadcast data service signal with a code rate of 20 Mbps.

7. The slave satellite signal processing device according to any one of claims 1 to 4, characterized in that: The composite signal is a signal that complies with the 1553B standard serial port transmission rate of 1 Mbps.

8. The slave satellite signal processing device according to any one of claims 1 to 4, characterized in that: The telemetry data packet of the first slave satellite is a measurement and control system signal with a code rate of 4 kbps.

9. The slave satellite signal processing device according to any one of claims 1 to 4, characterized in that: The remote control data packet of the master satellite or the second slave satellite is a measurement and control system signal with a code rate of 1 kbps.

10. An intersatellite communication system, characterized in that: It comprises a master satellite and a plurality of slave satellites adjacent to the master satellite; at least one of the plurality of slave satellites is deployed with a slave satellite signal processing device as claimed in any one of claims 1 to 9.

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