Satellite-borne multimode terminal and data processing method thereof

Abstract

The embodiment of the invention provides a satellite-borne multi-mode terminal and a data processing method thereof. The satellite-borne multimode terminal comprises an X-frequency-band measurement and control antenna, a Ka-frequency-band relay phased-array antenna, a frequency conversion module and a control and baseband module, when a user satellite is invisible, a forward signal forwarded by a relay satellite is received, the forward signal is processed to obtain uplink data, the uplink data is sent to the user satellite, and the user satellite transmits the uplink data to the frequency conversion module. And when the user satellite is visible, receiving an X-frequency-band remote control signal sent by the ground system, processing the X-frequency-band remote control signal to obtain uplink data, and sending the uplink data to the user satellite, and processing the downlink data to obtain an X-band telemetry signal, and directly sending the X-band telemetry signal to a ground system. The satellite-borne multi-mode terminal can improve the coverage rate and the real-time performance of measurement and control.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to the field of communication technologies, and more specifically, to a spaceborne multi-mode terminal and a data processing method thereof. Background Art

[0002] With the gradual expansion of the low-Earth orbit satellite constellation system, the problem of efficient and time-sensitive data transmission has become prominent. In current on-orbit implementation solutions, ground-based measurement and control and data transmission are restricted by the ground-based distribution and can only be carried out within the visible arc to the ground, resulting in low coverage and poor real-time performance of measurement and control and data transmission. Summary of the Invention

[0003] The embodiments described herein provide a spaceborne multi-mode terminal and a data processing method thereof, which can improve the coverage and real-time performance of measurement and control.

[0004] In a first aspect, the present disclosure provides a spaceborne multi-mode terminal carried on a user satellite. The spaceborne multi-mode terminal includes: an X-band measurement and control antenna, a Ka-band relay phased array antenna, a frequency conversion module, and a control and baseband module.

[0005] The Ka-band relay phased array antenna is configured to receive a forward signal relayed by a relay satellite and send a reverse signal to the relay satellite when the ground system is not visible to the user satellite, so that the relay satellite forwards the reverse signal to the ground system. The X-band measurement and control antenna is configured to receive an X-band remote control signal sent by the ground system and send an X-band telemetry signal to the ground system when the ground system is visible to the user satellite.

[0006] The control and baseband module is configured to process the downlink data sent by the user satellite to obtain a downlink signal, process the uplink signal sent to the frequency conversion module to obtain uplink data, and send the uplink data to the user satellite. The frequency conversion module is configured to perform up-conversion processing on the uplink signal to obtain the reverse signal and perform down-conversion processing on the forward signal to obtain the uplink signal when the ground system is not visible to the user satellite; perform up-conversion processing on the downlink signal to obtain the X-band telemetry signal and perform down-conversion processing on the X-band remote control signal to obtain the uplink signal when the ground system is visible to the user satellite.

[0007] In some embodiments of the present disclosure, the control and baseband module includes an uplink processing unit and a downlink processing unit.

[0008] The uplink processing unit is configured to demodulate, decode, and frame parse the uplink signal to obtain the uplink data. The downlink processing unit is configured to perform AOS framing, channel coding, scrambling, and modulation on the downlink data to obtain the downlink signal.

[0009] In some embodiments of the present disclosure, the frequency conversion module includes: a Ka-band up-conversion channel, a Ka-band down-conversion channel, an X-band down-conversion channel, and an X-band TT&C up-conversion channel.

[0010] The Ka-band up-conversion channel is configured to perform up-conversion mixing and filtering on the downlink signal, and amplify the downlink signal to obtain the return signal. The X-band TT&C up-conversion channel is configured to perform up-conversion mixing and filtering on the downlink signal, and amplify the downlink signal to obtain the X-band telemetry signal.

[0011] The Ka-band down-conversion channel is configured to perform down-conversion mixing and filtering on the forward signal, and amplify the forward signal based on a preset gain to obtain the uplink signal. The X-band down-conversion channel is configured to perform down-conversion mixing and filtering on the X-band remote control signal, and amplify the X-band remote control signal to obtain the uplink signal.

[0012] In some embodiments of the present disclosure, the spaceborne multimode terminal further includes an X-band data transmission channel.

[0013] The X-band data transmission channel is configured to, when the ground system is visible to the user satellite, perform up-conversion mixing and filtering on the downlink signal, and amplify the downlink signal to obtain the X-band data transmission signal. The X-band down-conversion channel is further configured to perform down-conversion mixing and filtering on the X-band up-link signal sent by the ground system, and amplify the X-band up-link signal to obtain the uplink signal.

[0014] In some embodiments of the present disclosure, the spaceborne multimode terminal further includes an X-band data transmission phased array antenna.

[0015] The X-band data transmission phased array antenna is configured to, when the ground system is visible to the user satellite, send the X-band data transmission signal to the ground system. The X-band TT&C antenna is further configured to, when the ground system is visible to the user satellite, receive the X-band up-link signal sent by the ground system.

[0016] In some embodiments of the present disclosure, the X-band down-conversion channel includes a first low-noise amplifier, a second low-noise amplifier, a first filter, a second filter, a third filter, a first mixer, a second mixer, a first amplifier, a second amplifier, a first voltage-controlled gain amplifier, a second voltage-controlled gain amplifier, a first voltage-controlled attenuator, and a first driver amplifier.

[0017] The X-band TT&C antenna is connected to the X-band input end of the control and baseband module through the first low-noise amplifier, the first filter, the second low-noise amplifier, the first mixer, the second filter, the first amplifier, the first voltage-controlled attenuator, the second mixer, the third filter, the first voltage-controlled gain amplifier, the second voltage-controlled gain amplifier, and the second amplifier in sequence. A first drive signal is connected to the control end of the first mixer through the first driver amplifier, and a second drive signal is connected to the control end of the second mixer. Among them, by adjusting the control voltages of the first voltage-controlled attenuator, the first voltage-controlled gain amplifier, and the second voltage-controlled gain amplifier, the output signal of the X-band down-conversion channel is adjusted.

[0018] In some embodiments of the present disclosure, the X-band TT&C up-conversion channel includes a second voltage-controlled attenuator, a fourth filter, a fifth filter, a third amplifier, a third mixer, a second driver amplifier, a third driver amplifier, a fourth driver amplifier, a power amplifier, and an isolator. The X-band TT&C output end of the control and baseband module is connected to the X-band TT&C antenna through the second voltage-controlled attenuator, the fourth filter, the third amplifier, the third mixer, the second driver amplifier, the third driver amplifier, the power amplifier, and the isolator in sequence. A third drive signal is connected to the control end of the third mixer through the fourth driver amplifier.

[0019] In some embodiments of the present disclosure, the X-band data transmission channel includes: a low-pass filter, a numerically controlled attenuator, a fourth amplifier, a fifth amplifier, a sixth amplifier, a gain equalizer, a fourth mixer, a sixth filter, and a fifth driver amplifier. The X-band data transmission output end of the control and baseband module is connected to the X-band data transmission phased array antenna through the low-pass filter, the numerically controlled attenuator, the fourth amplifier, the gain equalizer, the fourth mixer, the sixth filter, the fifth amplifier, and the sixth amplifier in sequence. A fourth drive signal is connected to the control end of the fourth mixer through the fifth driver amplifier.

[0020] In some embodiments of the present disclosure, the spaceborne multimode terminal further includes a power supply module. The power supply module is configured to supply power to the Ka-band relay phased array antenna when the ground system is not visible to the user satellite, so that the Ka-band relay phased array antenna operates; and supply power to the X-band data transmission phased array antenna when the ground system is visible to the user satellite, so that the X-band data transmission phased array antenna operates.

[0021] In a second aspect, the present disclosure provides a data processing method for a spaceborne multimode terminal, which is applied to any spaceborne multimode terminal provided in the first aspect. The method includes: When the ground system is not visible to the user satellite, receive the forward signal relayed by the relay satellite and perform down-conversion processing on the forward signal to obtain an uplink signal; when the ground system is visible to the user satellite, receive the X-band telecommand signal sent by the ground system and perform down-conversion processing on the X-band telecommand signal to obtain the uplink signal; process the uplink signal to obtain uplink data, and send the uplink data to the user satellite.

[0022] The method further includes: Process the downlink data sent by the user satellite to obtain a downlink signal; When the ground system is not visible to the user satellite, perform up-conversion processing on the downlink signal to obtain a reverse signal, and send the reverse signal to the relay satellite, so that the relay satellite forwards the reverse signal to the ground system; when the ground system is visible to the user satellite, perform up-conversion processing on the downlink signal to obtain an X-band telemetry signal, and send the X-band telemetry signal to the ground system.

[0023] In the technical solution provided by the present disclosure, when the user satellite is not visible to the ground system, the Ka-band relay phased array antenna receives the forward signal relayed by the relay satellite, and the frequency conversion module performs down-conversion processing on the forward signal to obtain the uplink signal. The control and baseband module processes the uplink signal to obtain uplink data, and sends the uplink data to the user satellite. The downlink data sent by the user satellite is processed to obtain the downlink signal, and the frequency conversion module performs up-conversion processing on the downlink signal to obtain the return signal. The Ka-band relay phased array antenna sends the return signal to the relay satellite, so that the relay satellite forwards the return signal to the ground system, realizing relay measurement and control and relay data transmission. When the ground system is visible to the user satellite, the X-band measurement and control antenna receives the X-band remote control signal sent by the ground system, and the frequency conversion module performs up-conversion processing on the X-band remote control signal to obtain the uplink signal. The control and baseband module processes the uplink signal to obtain uplink data, and sends the uplink data to the user satellite. The downlink data sent by the user satellite is processed to obtain the downlink signal, and the frequency conversion module performs up-conversion processing on the downlink signal to obtain the X-band telemetry signal. The X-band measurement and control antenna directly sends the X-band telemetry signal to the ground system, realizing ground measurement and control. In this way, measurement and control can also be performed outside the visible arc to the ground, which can improve the coverage rate and real-time performance of measurement and control. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly described below. It should be understood that the following described drawings only relate to some embodiments of the present disclosure and do not limit the present disclosure, where: Figure 1 It is a schematic diagram of the application scenario provided by the embodiment of the present disclosure.

[0025] Figure 2 It is a schematic diagram of the structure of a spaceborne multi-mode terminal provided by the embodiment of the present disclosure.

[0026] Figure 3 It is a schematic diagram of a forward link provided by the embodiment of the present disclosure.

[0027] Figure 4 It is a schematic diagram of a return link provided by the embodiment of the present disclosure.

[0028] Figure 5 It is a schematic diagram of the structure of an X-band down-conversion channel provided by the embodiment of the present disclosure.

[0029] Figure 6 It is a schematic diagram of the structure of an X-band measurement and control up-conversion channel provided by the embodiment of the present disclosure.

[0030] Figure 7 It is a schematic diagram of the structure of an X-band data transmission channel provided by the embodiment of the present disclosure.

[0031] Figure 8 This is a schematic structural diagram of another spaceborne multi-mode terminal provided by an embodiment of the present disclosure.

[0032] Figure 9 This is a schematic flowchart of a data processing method provided by an embodiment of the present disclosure. Detailed implementation manners

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of the present disclosure without creative efforts shall also fall within the scope of protection of the present disclosure.

[0034] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art to which the subject matter of the present disclosure belongs. Further, it will be understood that terms such as those defined in commonly used dictionaries shall be interpreted as having a meaning consistent with the meaning in the context of the specification and the relevant art, and will not be interpreted in an idealized or overly formal form unless otherwise clearly defined herein. Additionally, terms such as "first" and "second" are only used to distinguish one component (or a part of a component) from another component (or another part of a component).

[0035] Figure 1 This is a schematic diagram of an application scenario provided by an embodiment of the present disclosure. As Figure 1 shown, the application scenario includes a user satellite 10, a relay satellite 20, and a ground system 30. Among them, the spaceborne multi-mode terminal 100 provided by the present disclosure is carried on the user satellite 10. When the ground system 30 is visible to the user satellite 10, the ground system 30 can directly establish a communication connection with the user satellite 10. When the ground system 30 is not visible to the user satellite 10, the ground system 30 establishes a communication connection with the relay satellite 20, and the relay satellite 20 establishes a communication connection with the user satellite 10. Then, the ground system 30 indirectly establishes a communication connection with the user satellite 10 through the relay satellite 20.

[0036] Figure 2 This is a schematic structural diagram of a spaceborne multi-mode terminal provided by an embodiment of the present disclosure. As Figure 2 shown, the spaceborne multi-mode terminal 100 includes an X-band TT&C antenna 110, a Ka-band relay phased array antenna 120, a frequency conversion module 130, and a control and baseband module 140.

[0037] Among them, the control and baseband module 140 includes a Ka-band input end, a Ka-band output end, an X-band input end, and an X-band TT&C output end. The frequency conversion module 130 includes a Ka-band up-conversion input end, a Ka-band up-conversion output end, a Ka-band down-conversion input end, a Ka-band down-conversion output end, an X-band TT&C up-conversion input end, an X-band TT&C up-conversion output end, an X-band down-conversion input end, and an X-band down-conversion output end.

[0038] The Ka-band output end is connected to the Ka-band up-conversion input end. The Ka-band up-conversion output end is connected to the input end of the Ka-band relay phased array antenna 120 through a radio frequency cable. The output end of the Ka-band relay phased array antenna 120 is connected to the Ka-band down-conversion input end through a radio frequency cable. The Ka-band down-conversion output end is connected to the Ka-band input end. The X-band TT&C output end is connected to the X-band TT&C up-conversion input end. The X-band TT&C up-conversion output end is connected to the input end of the X-band TT&C antenna 110 through a radio frequency cable. The output end of the X-band TT&C antenna 110 is connected to the X-band down-conversion input end through a radio frequency cable. The X-band down-conversion output end is connected to the X-band input end.

[0039] The X-band TT&C antenna 110 is configured to receive the X-band telecommand signal sent by the ground system and send the X-band telemetry signal to the ground system when the ground system can see the user satellite. The Ka-band relay phased array antenna 120 is configured to receive the forward signal relayed by the relay satellite and send the reverse signal to the relay satellite when the ground system cannot see the user satellite, so that the relay satellite forwards the reverse signal to the ground system.

[0040] The control and baseband module 140 is configured to process the downlink data sent by the user satellite to obtain a downlink signal, process the uplink signal sent by the frequency conversion module 130 to obtain uplink data, and send the uplink data to the user satellite. The frequency conversion module 130 is configured to perform up-conversion processing on the downlink signal to obtain a reverse signal and perform down-conversion processing on the forward signal to obtain an uplink signal when the ground system cannot see the user satellite; when the ground system can see the user satellite, perform up-conversion processing on the downlink signal to obtain an X-band telemetry signal and perform down-conversion processing on the X-band telecommand signal to obtain an uplink signal.

[0041] Exemplarily, the forward signal includes a Ka-band telecommand signal, the uplink signal includes a telecommand signal, and the uplink data includes a telecommand. The reverse signal includes a Ka-band telemetry signal, the downlink signal includes a telemetry signal, and the downlink data includes telemetry data.

[0042] Such as Figure 2As shown in the figure, the frequency conversion module 130 includes a Ka-band down-conversion channel 131 and a Ka-band up-conversion channel 132, and the control and baseband module 140 includes an uplink processing unit and a downlink processing unit. The Ka-band relay phased array antenna 120 is connected to the Ka-band down-conversion channel 131 through a Ka-band down-conversion input terminal. The Ka-band down-conversion channel 131 is connected to the uplink processing unit through a Ka-band down-conversion output terminal and a Ka-band input terminal. The uplink processing unit is connected to the user satellite through a forward service data interface.

[0043] The Ka-band up-conversion channel 132 is connected to the Ka-band relay phased array antenna 120 through a Ka-band up-conversion output terminal. The downlink processing unit is connected to the Ka-band up-conversion channel 132 through a Ka-band output terminal and a Ka-band up-conversion input terminal. The downlink processing unit is connected to the user satellite through a reverse service data interface.

[0044] When the ground system is invisible to the user satellite, the ground system sends a Ka-band telecommand signal to the relay satellite. The Ka-band relay phased array antenna 120 can receive the Ka-band telecommand signal relayed by the relay satellite and input the Ka-band telecommand signal into the Ka-band down-conversion channel 131. The Ka-band down-conversion channel 131 performs down-conversion mixing and filtering on the Ka-band telecommand signal, and amplifies the Ka-band telecommand signal based on a preset gain to obtain a telecommand signal, and sends the telecommand signal to the uplink processing unit.

[0045] The uplink processing unit can demodulate, decode, and frame-analyze the telecommand signal based on the forward link as Figure 3 shown in the figure to obtain a telecommand, Figure 3 which is a schematic diagram of a forward link provided by an embodiment of the present disclosure. Among them, for a direct command, the uplink processing unit outputs an OC level signal or an OC pulse signal after decoding. For an indirect command, the uplink processing unit outputs it to the user satellite through a bus interface.

[0046] The downlink processing unit can receive the telemetry data sent by the user satellite and perform AOS framing, channel coding, scrambling, and modulation on the telemetry data based on the reverse link as Figure 4 shown in the figure to obtain a telemetry signal, Figure 4 which is a schematic diagram of a reverse link provided by an embodiment of the present disclosure.

[0047] The Ka-band up-conversion channel 132 receives the telemetry signal sent by the downlink processing unit, performs up-conversion mixing and filtering on the telemetry signal, and amplifies the telemetry signal to obtain a Ka-band telemetry signal, and sends the Ka-band telemetry signal to the Ka-band relay phased array antenna 120. The Ka-band relay phased array antenna 120 sends the Ka-band telemetry signal to the relay satellite, and the relay satellite then forwards the Ka-band telemetry signal to the ground system.

[0048] In this way, when the ground system is not visible to the user satellite, the on-board multimode terminal 100 can process the telecommand signals relayed by the relay satellite, and can also forward the telemetry signals to the ground system through the relay satellite, realizing the relay measurement and control of the user satellite.

[0049] Exemplarily, the forward signal further includes a Ka-band uplink signal, the uplink signal further includes an uplink signal, and the uplink data further includes uplink data. The return signal further includes a Ka-band data transmission signal, the downlink signal further includes a data transmission signal, and the downlink data further includes data transmission data.

[0050] When the ground system is not visible to the user satellite, the ground system sends the Ka-band uplink signal to the relay satellite. The Ka-band relay phased array antenna 120 can receive the Ka-band uplink signal relayed by the relay satellite, and input the Ka-band uplink signal into the Ka-band down-conversion channel 131. The Ka-band down-conversion channel 131 performs down-conversion mixing and filtering on the Ka-band uplink signal, and amplifies the Ka-band uplink signal based on a preset gain to obtain an uplink signal, and sends the uplink signal to the uplink processing unit. The uplink processing unit demodulates the uplink signal based on the forward link, obtains and stores the uplink data, and outputs the uplink data to the user satellite through the bus interface based on an instruction.

[0051] The downlink processing unit can receive the data transmission data sent by the user satellite, perform AOS framing, channel coding, scrambling and modulation on the data transmission data based on the return link to obtain a data transmission signal. The Ka-band up-conversion channel 132 receives the data transmission signal sent by the downlink processing unit, performs up-conversion mixing and filtering on the data transmission signal, and amplifies the data transmission signal to obtain a Ka-band data transmission signal, and sends the Ka-band data transmission signal to the Ka-band relay phased array antenna 120. The Ka-band relay phased array antenna 120 sends the Ka-band data transmission signal to the relay satellite, and the relay satellite then forwards the Ka-band data transmission signal to the ground system.

[0052] In this way, when the ground system is not visible to the user satellite, the on-board multimode terminal 100 can process the uplink signals relayed by the relay satellite, and can also forward the data transmission signals to the ground system through the relay satellite, realizing the relay data transmission of the user satellite.

[0053] Continue to refer to Figure 2, the frequency conversion module 130 further includes an X-band down-conversion channel 133 and an X-band TT&C up-conversion channel 134. The X-band down-conversion channel 133 is connected to the control and baseband module 140 through an X-band down-conversion output terminal and an X-band input terminal. The X-band TT&C antenna 110 is connected to the X-band down-conversion channel 133 through an X-band down-conversion input terminal. The X-band TT&C up-conversion channel 134 is connected to the X-band TT&C antenna 110 through an X-band TT&C up-conversion output terminal. The control and baseband module 140 is connected to the X-band TT&C up-conversion channel 134 through an X-band TT&C output terminal and an X-band TT&C up-conversion input terminal.

[0054] Exemplarily, when the ground system can see the user satellite, the ground system sends an X-band telecommand signal to the X-band TT&C antenna 110. The X-band TT&C antenna 110 sends the received X-band telecommand signal to the X-band down-conversion channel 133. The X-band down-conversion channel 133 performs down-conversion mixing and filtering on the X-band telecommand signal, and amplifies the X-band telecommand signal to obtain a telecommand signal, and sends the telecommand signal to the control and baseband module 140.

[0055] The X-band TT&C up-conversion channel 134 performs up-conversion mixing and filtering on the telemetry signal sent by the control and baseband module 140, and amplifies the telemetry signal to obtain an X-band telemetry signal, and sends the X-band telemetry signal to the X-band TT&C antenna 110. The X-band TT&C antenna 110 directly sends the X-band telemetry signal to the ground system.

[0056] In this way, when the ground system can see the user satellite, the on-board multi-mode terminal 100 can process the telecommand signal directly sent by the ground system, and can also directly send the telemetry signal to the ground system, realizing the TT&C of the user satellite to the ground.

[0057] In summary, for the on-board multi-mode terminal 100 provided by the embodiments of the present disclosure, when the ground system cannot see the user satellite, it processes the forward signal relayed by the relay satellite and forwards the reverse signal to the ground system through the relay satellite, realizing relay TT&C and relay data transmission. When the ground system can see the user satellite, it processes the telecommand signal directly sent by the ground system and directly sends the telemetry signal to the ground system, realizing the TT&C of the user satellite to the ground, and can improve the coverage rate and real-time performance of TT&C.

[0058] In some embodiments, referring further to Figure 2 , the on-board multi-mode terminal 100 further includes an X-band data transmission phased array antenna 150. The control and baseband module 140 further includes an X-band data transmission output terminal. The frequency conversion module 130 further includes an X-band data transmission up-conversion input terminal, an X-band data transmission up-conversion output terminal, and an X-band data transmission channel 135, as Figure 5 shown.

[0059] Among them, the X-band data transmission output end is connected to the X-band data transmission channel 135 through the X-band data transmission up-conversion input end, and the X-band data transmission channel 135 is connected to the input end of the X-band data transmission phased array antenna 150 through the X-band data transmission up-conversion output end and a radio frequency cable.

[0060] The X-band TT&C antenna 110 is further configured to receive the X-band uplink signal sent by the ground system when the ground system is visible to the user satellite. The X-band data transmission phased array antenna 150 is configured to send the X-band data transmission signal to the ground system when the ground system is visible to the user satellite.

[0061] The X-band data transmission channel 135 is configured to perform up-conversion mixing and filtering on the downlink signal and amplify the downlink signal to obtain the X-band data transmission signal when the ground system is visible to the user satellite. The X-band down-conversion channel is further configured to perform down-conversion processing on the X-band uplink signal sent by the ground system and amplify the X-band uplink signal to obtain the uplink signal.

[0062] Exemplarily, when the ground system is visible to the user satellite, the ground system sends the X-band uplink signal to the X-band TT&C antenna 110, and the X-band TT&C antenna 110 sends the received X-band uplink signal to the X-band down-conversion channel 133. The X-band down-conversion channel 133 performs down-conversion processing on the X-band uplink signal to obtain the uplink signal and sends the uplink signal to the control and baseband module 140.

[0063] The X-band data transmission channel 135 performs up-conversion mixing and filtering on the data transmission signal sent by the control and baseband module 140, amplifies the data transmission signal to obtain the X-band data transmission signal, sends the X-band data transmission signal to the X-band data transmission phased array antenna 150, and the X-band data transmission phased array antenna 150 directly sends the X-band data transmission signal to the ground system.

[0064] In this way, when the ground system is visible to the user satellite, the on-board multi-mode terminal 100 can process the uplink signal directly sent by the ground system and can also directly send the data transmission signal to the ground system, realizing high-speed data transmission between the user satellite and the ground.

[0065] In some embodiments, Figure 5 is a schematic structural diagram of an X-band down-conversion channel provided by an embodiment of the present disclosure. As Figure 5 shown, the X-band down-conversion channel 133 includes a first low-noise amplifier LNA1, a second low-noise amplifier LNA2, a first filter F1, a second filter F2, a third filter F3, a first mixer M1, a second mixer M2, a first amplifier A1, a second amplifier A2, a first voltage-controlled gain amplifier VGA1, a second voltage-controlled gain amplifier VGA2, a first voltage-controlled attenuator VCA1, and a first driver amplifier DA1.

[0066] Exemplarily, the output end of the X-band TT&C antenna 110 is connected to the input end of the first low-noise amplifier LNA1 through a radio frequency cable. The output end of the first low-noise amplifier LNA1 is sequentially connected to the input end of the X-band through the first filter F1, the second low-noise amplifier LNA2, the first mixer M1, the second filter F2, the first amplifier A1, the first voltage-controlled attenuator VCA1, the second mixer M2, the third filter F3, the first voltage-controlled gain amplifier VGA1, the second voltage-controlled gain amplifier VGA2, and the second amplifier A2. The first drive signal is connected to the control end of the first mixer M1 through the first drive amplifier DA1, and the second drive signal is connected to the control end of the second mixer M2.

[0067] The X-band down-conversion channel 133 adopts a two-stage frequency conversion scheme. By adjusting the control voltages of the first voltage-controlled attenuator VCA1, the first voltage-controlled gain amplifier VGA1, and the second voltage-controlled gain amplifier VGA2, the output signal of the X-band down-conversion channel 133 can be dynamically adjusted.

[0068] In some embodiments, Figure 6 is a schematic structural diagram of an X-band TT&C up-conversion channel provided by an embodiment of the present disclosure. As Figure 6 shown, the X-band TT&C up-conversion channel 134 includes a second voltage-controlled attenuator VCA2, a fourth filter F4, a fifth filter F5, a third amplifier A3, a third mixer M3, a second drive amplifier DA2, a third drive amplifier DA3, a fourth drive amplifier DA4, a power amplifier PA, and an isolator IS.

[0069] Exemplarily, the X-band TT&C output end is sequentially connected to the input end of the isolator IS through the second voltage-controlled attenuator VCA2, the fourth filter F4, the third amplifier A3, the third mixer M3, the second drive amplifier DA2, the third drive amplifier DA3, and the power amplifier PA. The output end of the isolator IS is connected to the input end of the X-band TT&C antenna 110 through a radio frequency cable. The third drive signal is connected to the control end of the third mixer M3 through the fourth drive amplifier DA4.

[0070] The control and baseband module 140 includes an in-phase / quadrature modulator IQ. The control end of the in-phase / quadrature modulator IQ is connected to a modulation drive signal. The in-phase / quadrature modulator IQ cooperates with the X-band TT&C up-conversion channel 134 to implement a two-stage frequency conversion scheme.

[0071] In some embodiments, Figure 7 is a schematic structural diagram of an X-band data transmission channel provided by an embodiment of the present disclosure. As Figure 7As shown, the X-band data transmission channel 135 includes: a low-pass filter LPF, a digital controlled attenuator DCA, a fourth amplifier A4, a fifth amplifier A5, a sixth amplifier A6, a gain equalizer EQ, a fourth mixer M4, a sixth filter F6, and a fifth driver amplifier DA5.

[0072] Exemplarily, the X-band data transmission output end is sequentially connected to the X-band data transmission phased array antenna 150 through a low-pass filter LPF, a digital controlled attenuator DCA, a fourth amplifier A4, a gain equalizer EQ, a fourth mixer M4, a sixth filter F6, a fifth amplifier A5, and a sixth amplifier A6. The fourth drive signal is connected to the control end of the fourth mixer M4 through a fifth driver amplifier DA5.

[0073] The digital-to-analog converter in the control and baseband module 140 outputs an X-band intermediate frequency signal. The X-band data transmission channel 135 filters, amplifies, and mixes the X-band intermediate frequency signal and then outputs a radio frequency signal. By adjusting the attenuation amount of the digital controlled attenuator DCA, a gain adjustment of 0 - 15 dBm can be achieved, and the frequency adjustment is achieved by modifying the L0 frequency point.

[0074] In some embodiments, Figure 8 is a schematic structural diagram of another spaceborne multimode terminal provided by an embodiment of the present disclosure. As Figure 8 shown, the spaceborne multimode terminal further includes a power supply module 160. The input end of the power supply module 160 is connected to the user satellite, and multiple output ends of the power supply module 160 are respectively and electrically connected to the power supply end of the X-band data transmission phased array antenna 150, the power supply end of the Ka-band relay phased array antenna 120, the power supply end of the control and baseband module 140, and the power supply end of the frequency conversion module 130 in one-to-one correspondence.

[0075] The power supply module 160 is configured to supply power to the Ka-band relay phased array antenna 120 when the ground system is invisible to the user satellite, so that the Ka-band relay phased array antenna 120 works; when the ground system is visible to the user satellite, supply power to the X-band data transmission phased array antenna 150, so that the X-band data transmission phased array antenna 150 works.

[0076] Exemplarily, the power supply module 160 continuously supplies power to the control and baseband module 140 and the frequency conversion module 130, and based on the OC instruction, supplies power to the Ka-band relay phased array antenna 120 and / or the X-band data transmission phased array antenna 150. When the ground system is invisible to the user satellite, the power supply module 160 receives the first OC instruction. Based on the first OC instruction, it supplies power to the Ka-band relay phased array antenna 120 and stops supplying power to the X-band data transmission phased array antenna 150, so that the Ka-band relay phased array antenna 120 works and the X-band data transmission phased array antenna 150 stops working to reduce unnecessary energy waste.

[0077] When the ground system is visible to the user satellite, the power supply module 160 receives the second OC command. Based on the second OC command, it supplies power to the X-band data transmission phased array antenna 150 and stops supplying power to the Ka-band relay phased array antenna 120, so that the X-band data transmission phased array antenna 150 works and the Ka-band relay phased array antenna 120 stops working, thereby reducing unnecessary energy waste.

[0078] The embodiment of the present disclosure also provides a data processing method, which is applied to the on-board multi-mode terminal 100 provided in any of the above embodiments.

[0079] Figure 9 It is a schematic flowchart of a data processing method provided by the embodiment of the present disclosure. As Figure 9 shown, the specific steps of the data processing method include: S101, determine whether the ground system is visible to the user satellite.

[0080] Exemplarily, it can be determined whether the ground system is visible to the user satellite according to the pose information of the user satellite, the position information of the ground system, and the position information of the relay satellite. If the ground system is not visible to the user satellite, execute S102-S105. If the ground system is visible to the user satellite, execute S102'-S105'.

[0081] S102, receive the forward signal relayed by the relay satellite, and perform down-conversion processing on the forward signal to obtain the uplink signal.

[0082] Exemplarily, the forward signal includes a Ka-band remote control signal and a Ka-band upload signal, the uplink signal includes a remote control signal and an upload signal, and the uplink data includes a remote control command and upload data.

[0083] When the ground system is not visible to the user satellite, the ground system sends the Ka-band remote control signal to the relay satellite. Based on the Ka-band relay phased array antenna, the Ka-band remote control signal relayed by the relay satellite can be received. Based on the Ka-band down-conversion channel, the Ka-band remote control signal is subjected to down-conversion mixing and filtering, and the Ka-band remote control signal is amplified based on a preset gain to obtain the remote control signal.

[0084] The ground system sends the Ka-band upload signal to the relay satellite. Based on the Ka-band relay phased array antenna, the upload-band remote control signal relayed by the relay satellite can be received. Based on the Ka-band down-conversion channel, the Ka-band upload signal is subjected to down-conversion mixing and filtering, and the Ka-band upload signal is amplified based on a preset gain to obtain the upload signal.

[0085] S103, process the uplink signal to obtain uplink data, and send the uplink data to the user satellite.

[0086] Exemplarily, based on the forward link of the control and baseband module, the remote control signal is demodulated, decoded, and frame-analyzed to obtain a remote control instruction. Among them, for a direct instruction, an OC level signal or an OC pulse signal is output after decoding. For an indirect instruction, it is output to the user satellite through the bus interface. Based on the forward link of the control and baseband module, the uplink signal is demodulated to obtain uplink data and stored, and the uplink data is output to the user satellite through the bus interface based on the instruction.

[0087] S104. Process the downlink data sent by the user satellite to obtain a downlink signal.

[0088] Exemplarily, the reverse signal includes a Ka-band telemetry signal and a Ka-band data transmission signal. The downlink signal includes a telemetry signal and a data transmission signal. The downlink data includes telemetry data and data transmission data.

[0089] Based on the control and baseband module, receive the telemetry data sent by the user satellite, and based on the reverse link in the control and baseband module, perform AOS framing, channel coding, scrambling, and modulation on the telemetry data to obtain a telemetry signal. Based on the control and baseband module, receive the data transmission data sent by the user satellite, and based on the reverse link in the control and baseband module, perform AOS framing, channel coding, scrambling, and modulation on the data transmission data to obtain a data transmission signal.

[0090] S105. Perform up-conversion processing on the downlink signal to obtain a reverse signal, and send the reverse signal to the relay satellite so that the relay satellite forwards the reverse signal to the ground system.

[0091] Exemplarily, when the ground system is not visible to the user satellite, based on the Ka-band up-conversion channel, receive the data transmission signal sent by the control and baseband module, perform up-conversion mixing and filtering on the data transmission signal, and amplify the data transmission signal to obtain a Ka-band data transmission signal. Send the Ka-band data transmission signal to the relay satellite through the Ka-band relay phased array antenna so that the relay satellite forwards the Ka-band data transmission signal to the ground system again.

[0092] Based on the Ka-band up-conversion channel, receive the telemetry signal sent by the control and baseband module, perform up-conversion mixing and filtering on the telemetry signal, and amplify the telemetry signal to obtain a Ka-band telemetry signal. Send the Ka-band telemetry signal to the relay satellite through the Ka-band relay phased array antenna so that the relay satellite forwards the Ka-band telemetry signal to the ground system again.

[0093] S102’. Receive the X-band remote control signal sent by the ground system and perform down-conversion processing on the X-band remote control signal to obtain an uplink signal.

[0094] Exemplarily, when the ground system is visible to the user satellite, based on the X-band TT&C antenna, the X-band telecommand signal directly sent by the ground system can be received, and the X-band telecommand signal is down-converted, mixed, filtered, and amplified through the X-band down-conversion channel to obtain the telecommand signal.

[0095] S103’, Process the uplink signal to obtain uplink data, and send the uplink data to the user satellite.

[0096] Exemplarily, it is the same as S103. For specific details, refer to the relevant description of S103.

[0097] S104’, Process the downlink data sent by the user satellite to obtain the downlink signal.

[0098] Exemplarily, it is the same as S104. For specific details, refer to the relevant description of S104.

[0099] S105’, Perform up-conversion processing on the downlink signal to obtain the X-band telemetry signal, and send the X-band telemetry signal to the ground system.

[0100] Exemplarily, when the ground system is visible to the user satellite, based on the X-band TT&C up-conversion channel, receive the telemetry signal sent by the control and baseband module, perform up-conversion mixing and filtering on the telemetry signal, and amplify the telemetry signal to obtain the X-band telemetry signal, and send the X-band telemetry signal directly to the ground system through the X-band TT&C antenna.

[0101] In the embodiments of the present disclosure, when the ground system is not visible to the user satellite, receive the forward signal relayed by the relay satellite, perform down-conversion processing on the forward signal to obtain the uplink signal, process the uplink signal to obtain the uplink data, and send the uplink data to the user satellite, process the downlink data sent by the user satellite to obtain the downlink signal, perform up-conversion processing on the downlink signal to obtain the reverse signal, and send the reverse signal to the relay satellite, so that the relay satellite forwards the reverse signal to the ground system, and relay TT&C and relay data transmission can be realized. When the ground system is visible to the user satellite, receive the X-band telecommand signal sent by the ground system, perform down-conversion processing on the X-band telecommand signal to obtain the uplink signal, process the uplink signal to obtain the uplink data, and send the uplink data to the user satellite, process the downlink data sent by the user satellite to obtain the downlink signal, perform up-conversion processing on the downlink signal to obtain the X-band telemetry signal, and send the X-band telemetry signal directly to the ground system to achieve ground TT&C. In this way, TT&C can also be performed outside the visible arc to the ground, which can improve the coverage rate and real-time performance of TT&C.

[0102] In some embodiments, as a specific description of a possible implementation manner when executing S102’, the following is provided: Receive the X-band uplink signal sent by the ground system.

[0103] Exemplarily, based on the X-band TT&C antenna, receive the X-band uplink signal directly sent by the ground system, perform down-conversion processing on the X-band uplink signal based on the X-band down-conversion channel, and amplify the X-band uplink signal to obtain the uplink signal.

[0104] On the basis of the above embodiments, after executing S105’, the following steps are further included: Perform up-conversion mixing and filtering on the downlink signal, and amplify the downlink signal to obtain the X-band data transmission signal, and send the X-band data transmission signal to the ground system.

[0105] Exemplarily, based on the X-band data transmission channel, perform up-conversion mixing and filtering on the data transmission signal sent by the control and baseband module, and amplify the data transmission signal to obtain the X-band data transmission signal, and directly send the X-band data transmission signal to the ground system through the X-band data transmission phased array antenna.

[0106] In the embodiments of the present disclosure, when the ground system can see the user satellite, by receiving the X-band uplink signal sent by the ground system, performing up-conversion mixing and filtering on the downlink signal, and amplifying the downlink signal to obtain the X-band data transmission signal, and sending the X-band data transmission signal to the ground system, high-speed data transmission between the user satellite and the ground is realized.

[0107] Unless otherwise explicitly stated in the context, the singular forms of the words used in this specification and the appended claims include the plural, and vice versa. Thus, when referring to the singular, the corresponding plural is generally included. Similarly, the terms "comprising" and "including" will be interpreted as inclusive rather than exclusive. Likewise, the terms "including" and "or" should be interpreted as inclusive, unless such an interpretation is explicitly prohibited in this specification. Where the term "example" is used in this specification, especially when it is located after a group of terms, the "example" is merely exemplary and explanatory, and should not be considered exclusive or extensive.

[0108] Further aspects and scopes of adaptability become apparent from the description provided herein. It should be understood that the various aspects of the present disclosure can be implemented alone or in combination with one or more other aspects. It should also be understood that the description and specific embodiments herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure.

[0109] The above has described several embodiments of the present disclosure in detail. However, obviously, those skilled in the art can make various modifications and variations to the embodiments of the present disclosure without departing from the spirit and scope of the present disclosure. The protection scope of the present disclosure is defined by the appended claims.

Claims

1. A satellite-borne multi-mode terminal, characterized in that: Carried on a user satellite, the onboard multi-mode terminal comprises: an X-band tracking and control antenna, a Ka-band relay phased array antenna, a frequency conversion module, and a control and baseband module; The Ka-band relay phased array antenna is configured to receive a forward signal forwarded by a relay satellite and send a return signal to the relay satellite when the ground system is invisible to the user satellite, so that the relay satellite forwards the return signal to the ground system; The X-band tracking and control antenna is configured to receive an X-band remote control signal sent by the ground system and send an X-band telemetry signal to the ground system when the ground system is visible to the user satellite; The control and baseband module is configured to process the downlink data sent by the user satellite to obtain a downlink signal, process the uplink signal sent by the frequency conversion module to obtain uplink data, and send the uplink data to the user satellite; The frequency conversion module is configured to, when the ground system is not visible to the user satellite, perform up-conversion processing on the downlink signal to obtain the return signal, and perform down-conversion processing on the forward signal to obtain the uplink signal; when the ground system is visible to the user satellite, perform up-conversion processing on the downlink signal to obtain the X-band telemetry signal, and perform down-conversion processing on the X-band remote control signal to obtain the uplink signal.

2. The satellite-borne multi-mode terminal according to claim 1, characterized in that: The control and baseband module includes an uplink processing unit and a downlink processing unit; The uplink processing unit is configured to demodulate, decode and frame parse the uplink signal to obtain the uplink data; The downlink processing unit is configured to perform AOS framing, channel coding, scrambling and modulation on the downlink data to obtain the downlink signal.

3. The satellite-borne multi-mode terminal according to claim 1, characterized in that: The frequency conversion module includes: a Ka-band up-conversion channel, a Ka-band down-conversion channel, an X-band down-conversion channel and an X-band measurement and control up-conversion channel; The Ka-band up-conversion channel is configured to perform up-conversion, mixing and filtering on the downlink signal, and amplify the downlink signal to obtain the return signal; The X-band measurement and control up-conversion channel is configured to perform up-conversion, mixing and filtering on the downlink signal, and amplify the downlink signal to obtain the X-band telemetry signal; The Ka-band down-conversion channel is configured to perform down-conversion mixing and filtering on the forward signal, and amplify the forward signal based on a preset gain to obtain the uplink signal; The X-band down-conversion channel is configured to perform down-conversion, mixing and filtering on the X-band remote control signal, and amplify the X-band remote control signal to obtain the uplink signal.

4. The satellite-borne multi-mode terminal according to claim 3, characterized in that: The frequency conversion module also includes an X-band data transmission channel; The X-band data transmission channel is configured to, when the ground system is visible to the user satellite, perform up-conversion, mixing and filtering on the downlink signal, and amplify the downlink signal to obtain an X-band data transmission signal; The X-band down-conversion channel is further configured to perform down-conversion, mixing and filtering on the X-band uplink signal sent by the ground system, and amplify the X-band uplink signal to obtain the uplink signal.

5. The satellite-borne multi-mode terminal according to claim 4, characterized in that: The satellite-borne multi-mode terminal also includes an X-band data transmission phased array antenna; The X-band data transmission phased array antenna is configured to send the X-band data transmission signal to the ground system when the ground system is visible to the user satellite; The X-band tracking and control antenna is further configured to receive the X-band uplink signal sent by the ground system when the ground system is visible to the user satellite.

6. The satellite-borne multi-mode terminal according to claim 3, characterized in that: The X-band down-conversion channel includes a first low-noise amplifier, a second low-noise amplifier, a first filter, a second filter, a third filter, a first mixer, a second mixer, a first amplifier, a second amplifier, a first voltage-controlled gain amplifier, a second voltage-controlled gain amplifier, a first voltage-controlled attenuator and a first driver amplifier; The X-band measurement and control antenna is connected to the X-band input end of the control and baseband module through the first low-noise amplifier, the first filter, the second low-noise amplifier, the first mixer, the second filter, the first amplifier, the first voltage-controlled attenuator, the second mixer, the third filter, the first voltage-controlled gain amplifier, the second voltage-controlled gain amplifier and the second amplifier in sequence, the first drive signal is connected to the control end of the first mixer through the first drive amplifier, and the second drive signal is connected to the control end of the second mixer; The output signal of the X-band down-conversion channel is adjusted by adjusting the control voltages of the first voltage-controlled attenuator, the first voltage-controlled gain amplifier, and the second voltage-controlled gain amplifier.

7. The satellite-borne multi-mode terminal according to claim 3, characterized in that: The X-band measurement and control up-conversion channel includes a second voltage-controlled attenuator, a fourth filter, a fifth filter, a third amplifier, a third mixer, a second driver amplifier, a third driver amplifier, a fourth driver amplifier, a power amplifier and an isolator; The X-band measurement and control output end of the control and baseband module is connected to the X-band measurement and control antenna through the second voltage-controlled attenuator, the fourth filter, the third amplifier, the third mixer, the second drive amplifier, the third drive amplifier, the power amplifier and the isolator in sequence, and the third drive signal is connected to the control end of the third mixer through the fourth drive amplifier.

8. The satellite-borne multi-mode terminal according to claim 5, characterized in that: The X-band data transmission channel includes: a low-pass filter, a digitally controlled attenuator, a fourth amplifier, a fifth amplifier, a sixth amplifier, a gain equalizer, a fourth mixer, a sixth filter and a fifth driving amplifier; The X-band digital transmission output end of the control and baseband module is connected to the X-band digital transmission phased array antenna through the low-pass filter, the digitally controlled attenuator, the fourth amplifier, the gain equalizer, the fourth mixer, the sixth filter, the fifth amplifier and the sixth amplifier in sequence, and the fourth drive signal is connected to the control end of the fourth mixer through the fifth drive amplifier.

9. The satellite-borne multi-mode terminal according to claim 5 or 8, characterized in that: The onboard multi-mode terminal also includes a power module; The power module is configured to, when the ground system is not visible to the user satellite, supply power to the Ka-band relay phased array antenna so that the Ka-band relay phased array antenna works; and when the ground system is visible to the user satellite, supply power to the X-band data transmission phased array antenna so that the X-band data transmission phased array antenna works.

10. A data processing method for a satellite-borne multi-mode terminal, characterized in that: Applied to the satellite-borne multi-mode terminal according to any one of claims 1 to 9, the method comprises: When the ground system is invisible to the user satellite, a forward signal forwarded by the relay satellite is received, and the forward signal is down-converted to obtain an uplink signal; When the ground system is visible to the user satellite, receiving an X-band remote control signal sent by the ground system, and performing down-conversion processing on the X-band remote control signal to obtain the uplink signal; Processing the uplink signal to obtain uplink data, and sending the uplink data to the user satellite; The method further comprises: Processing the downlink data sent by the user satellite to obtain a downlink signal; When the ground system is invisible to the user satellite, up-convert the downlink signal to obtain a return signal, and send the return signal to the relay satellite so that the relay satellite forwards the return signal to the ground system; When the ground system is visible to the user satellite, the downlink signal is up-converted to obtain an X-band telemetry signal, and the X-band telemetry signal is sent to the ground system.

Images