Spaceborne multi-mode terminal and its data processing method

Abstract

This disclosure provides an onboard multi-mode terminal and its data processing method. The onboard multi-mode terminal includes: an X-band telemetry and control antenna, a Ka-band relay phased array antenna, a frequency conversion module, and a control and baseband module. When the user satellite is not visible, it receives forward signals relayed by the relay satellite, processes the forward signals to obtain uplink data, and sends the uplink data to the user satellite. It processes downlink data to obtain return signals and sends the return signals to the relay satellite, so that the relay satellite forwards the return signals to the ground system. When the user satellite is visible, it receives X-band remote control signals sent by the ground system, processes the X-band remote control signals to obtain uplink data, and sends it to the user satellite. It processes downlink data to obtain X-band telemetry signals and directly sends the X-band telemetry signals to the ground system. This onboard multi-mode terminal can improve the coverage and real-time performance of telemetry and control.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the field of communication technology, and more specifically, to a spaceborne multi-mode terminal and its data processing method. Background Technology

[0002] As low-Earth orbit satellite constellation systems gradually expand, the problem of efficient and timely data transmission has become prominent. In the current on-orbit implementation scheme, ground telemetry, tracking, and data transmission are limited by the distribution of ground-based systems, and can only be carried out within the visible arc of the ground, resulting in low coverage and poor real-time performance of telemetry, tracking, and data transmission. Summary of the Invention

[0003] The embodiments described herein provide a spaceborne multi-mode terminal and its data processing method, which can improve the coverage and real-time performance of telemetry, tracking, and command (TT&C).

[0004] In a first aspect, this disclosure provides a spaceborne multi-mode terminal mounted on a user satellite, the spaceborne multi-mode terminal comprising: an X-band telemetry 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, when the ground system is not visible to the user satellite, receive the forward signal relayed by the relay satellite and send the return signal to the relay satellite, so that the relay satellite forwards the return signal to the ground system. The X-band telemetry and control antenna is configured to, when the ground system is visible to the user satellite, receive the X-band remote control signal sent by the ground system and send the X-band telemetry signal to the ground system.

[0006] The control and baseband module is configured to process downlink data transmitted by the user satellite to obtain a downlink signal, process uplink signals transmitted by the frequency conversion module to obtain uplink data, and transmit the uplink data to the user satellite. The frequency conversion module is configured to, when the ground system cannot see the user satellite, upconvert the uplink signal to obtain the return signal and downconvert the forward signal to obtain the uplink signal; when the ground system can see the user satellite, upconvert the downlink signal to obtain the X-band telemetry signal and downconvert the X-band remote control signal to obtain the uplink signal.

[0007] In some embodiments of this 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 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 this disclosure, the frequency conversion module includes: a Ka-band upconversion channel, a Ka-band downconversion channel, an X-band downconversion channel, and an X-band measurement and control upconversion channel.

[0010] The Ka-band upconversion channel is configured to perform upconversion mixing and filtering on the downlink signal, and amplify the downlink signal to obtain the return signal. The X-band telemetry and control upconversion channel is configured to perform upconversion mixing and filtering on the downlink signal, and amplify the downlink signal to obtain the X-band telemetry signal.

[0011] The Ka-band downconversion channel is configured to perform downconversion 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 downconversion channel is configured to perform downconversion 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 this disclosure, the frequency conversion module further includes an X-band data transmission channel.

[0013] The X-band data transmission channel 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 mixing and filtering on the X-band uplink signal transmitted by the ground system and amplify the X-band uplink signal to obtain the uplink signal.

[0014] In some embodiments of this 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 transmit the X-band data transmission signal to the ground system when the ground system is visible to the user satellite. The X-band telemetry and control antenna is further configured to receive the X-band uplink signal transmitted by the ground system when the ground system is visible to the user satellite.

[0016] In some embodiments of this disclosure, the X-band downconversion 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 telemetry and control antenna is sequentially connected to the X-band input terminal of the control and baseband module via 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. A first drive signal is connected to the control terminal of the first mixer via the first drive amplifier, and a second drive signal is connected to the control terminal of the second mixer. The output signal of the X-band down-conversion channel is adjusted by regulating the control voltages of the first voltage-controlled attenuator, the first voltage-controlled gain amplifier, and the second voltage-controlled gain amplifier.

[0018] In some embodiments of this disclosure, the X-band measurement and control upconversion 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 terminal of the control and baseband module is connected to the X-band measurement and control antenna in sequence 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. The third drive signal is connected to the control terminal of the third mixer through the fourth driver amplifier.

[0019] In some embodiments of this disclosure, 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 driver amplifier. The X-band data transmission output terminal of the control and baseband module is connected to the X-band data transmission phased array antenna sequentially 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. The fourth drive signal is connected to the control terminal of the fourth mixer through the fifth driver amplifier.

[0020] In some embodiments of this 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, thereby enabling the Ka-band relay phased array antenna to operate; and to supply power to the X-band data transmission phased array antenna when the ground system is visible to the user satellite, thereby enabling the X-band data transmission phased array antenna to operate.

[0021] Secondly, this disclosure provides a data processing method for a spaceborne multi-mode terminal, applicable to any of the spaceborne multi-mode terminals provided in the first aspect, the method comprising:

[0022] When the ground system is not visible to the user satellite, it receives the forward signal relayed by the relay satellite and performs down-conversion processing on the forward signal to obtain the uplink signal; when the ground system is visible to the user satellite, it receives the X-band remote control signal sent by the ground system and performs down-conversion processing on the X-band remote control signal to obtain the uplink signal; it processes the uplink signal to obtain uplink data and sends the uplink data to the user satellite.

[0023] The method also includes:

[0024] The downlink data transmitted by the user satellite is processed to obtain a downlink signal;

[0025] When the ground system is not visible to the user satellite, the downlink signal is upconverted to obtain a return signal, and the return signal is sent 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 upconverted to obtain an X-band telemetry signal, and the X-band telemetry signal is sent to the ground system.

[0026] In the technical solution provided in this disclosure, when the ground system is not visible to the user satellite, the Ka-band relay phased array antenna receives the forward signal relayed by the relay satellite. 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. 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, thereby realizing relay telemetry, telemetry and control and relay data transmission. When the ground system is visible to the user satellite, the X-band telemetry and control antenna receives the X-band remote control signal sent by the ground system. The frequency conversion module up-converts 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. The frequency conversion module up-converts the downlink signal to obtain the X-band telemetry signal. The X-band telemetry and control antenna directly sends the X-band telemetry signal to the ground system to achieve ground telemetry and control. In this way, telemetry and control can be carried out outside the visible radius of the ground, which can improve the coverage and real-time performance of telemetry and control. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings of the embodiments will be briefly described below. It should be understood that the drawings described below only relate to some embodiments of this disclosure and are not intended to limit this disclosure, wherein:

[0028] Figure 1 This is a schematic diagram illustrating an application scenario provided by an embodiment of this disclosure.

[0029] Figure 2 This is a schematic diagram of the structure of a spaceborne multi-mode terminal provided in an embodiment of this disclosure.

[0030] Figure 3 This is a schematic diagram of a forward link provided in an embodiment of the present disclosure.

[0031] Figure 4 This is a schematic diagram of a return link provided in an embodiment of this disclosure.

[0032] Figure 5 This is a schematic diagram of the structure of an X-band downconversion channel provided in an embodiment of this disclosure.

[0033] Figure 6 This is a schematic diagram of the structure of an X-band measurement and control upconversion channel provided in an embodiment of this disclosure.

[0034] Figure 7 This is a schematic diagram of the structure of an X-band data transmission channel provided in an embodiment of the present disclosure.

[0035] Figure 8 This is a schematic diagram of another spaceborne multi-mode terminal provided in an embodiment of this disclosure.

[0036] Figure 9 This is a flowchart illustrating a data processing method provided in an embodiment of the present disclosure. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are also within the scope of protection of this disclosure.

[0038] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this subject matter pertains. It will be further understood that terms such as those defined in commonly used dictionaries shall be interpreted as having meanings consistent with their meanings in the context of the specification and in the relevant art, and shall not be interpreted in an idealized or overly formal form unless otherwise explicitly defined herein. Furthermore, terms such as “first” and “second” are used only to distinguish one component (or part of a component) from another component (or another part of a component).

[0039] Figure 1 This is a schematic diagram illustrating an application scenario provided by an embodiment of the present disclosure, such as... Figure 1 As shown, the application scenario includes a user satellite 10, a relay satellite 20, and a ground system 30. The user satellite 10 carries the onboard multi-mode terminal 100 provided in this disclosure. When the ground system 30 is visible to the user satellite 10, the ground system 30 and the user satellite 10 can directly establish a communication connection. 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. The relay satellite 20 then establishes a communication connection with the user satellite 10, thus the ground system 30 indirectly establishes a communication connection with the user satellite 10 through the relay satellite 20.

[0040] Figure 2 This is a schematic diagram of the structure of a spaceborne multi-mode terminal provided in an embodiment of this disclosure, as shown below. Figure 2 As shown, the spaceborne multimode terminal 100 includes an X-band telemetry and control antenna 110, a Ka-band relay phased array antenna 120, a frequency conversion module 130, and a control and baseband module 140.

[0041] The control and baseband module 140 includes a Ka-band input terminal, a Ka-band output terminal, an X-band input terminal, and an X-band measurement and control output terminal. The frequency conversion module 130 includes a Ka-band up-conversion input terminal, a Ka-band up-conversion output terminal, a Ka-band down-conversion input terminal, a Ka-band down-conversion output terminal, an X-band measurement and control up-conversion input terminal, an X-band measurement and control up-conversion output terminal, an X-band down-conversion input terminal, and an X-band down-conversion output terminal.

[0042] The Ka-band output terminal is connected to the Ka-band upconversion input terminal. The Ka-band upconversion output terminal is connected to the input terminal of the Ka-band relay phased array antenna 120 via an RF cable. The output terminal of the Ka-band relay phased array antenna 120 is connected to the Ka-band downconversion input terminal via an RF cable. The Ka-band downconversion output terminal is connected to the Ka-band input terminal. The X-band measurement and control output terminal is connected to the X-band measurement and control upconversion input terminal. The X-band measurement and control upconversion output terminal is connected to the input terminal of the X-band measurement and control antenna 110 via an RF cable. The output terminal of the X-band measurement and control antenna 110 is connected to the X-band downconversion input terminal via an RF cable. The X-band downconversion output terminal is connected to the X-band input terminal.

[0043] The X-band telemetry and control antenna 110 is configured to receive X-band remote control signals sent by the ground system and transmit X-band telemetry signals to the ground system when the ground system is visible to the user satellite. The Ka-band relay phased array antenna 120 is configured to receive forward signals relayed by the relay satellite and transmit return signals to the relay satellite when the ground system is not visible to the user satellite, so that the relay satellite can forward the return signals to the ground system.

[0044] The control and baseband module 140 is configured to process downlink data transmitted by the user satellite to obtain a downlink signal, process uplink signals transmitted by the frequency conversion module 130 to obtain uplink data, and transmit the uplink data to the user satellite. The frequency conversion module 130 is configured to, when the ground system is not visible to the user satellite, perform upconversion processing on the downlink signal to obtain a return signal, and downconvert processing on the forward signal to obtain an uplink signal; when the ground system is visible to the user satellite, perform upconversion processing on the downlink signal to obtain an X-band telemetry signal, and downconvert processing on the X-band remote control signal to obtain an uplink signal.

[0045] For example, the forward signal includes Ka-band remote control signals, the uplink signal includes remote control signals, and the uplink data includes remote control commands. The backward signal includes Ka-band telemetry signals, the downlink signal includes telemetry signals, and the downlink data includes telemetry data.

[0046] like Figure 2As shown, 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 the Ka-band down-conversion input terminal. The Ka-band down-conversion channel 131 is connected to the uplink processing unit through the Ka-band down-conversion output terminal and the Ka-band input terminal. The uplink processing unit is connected to the user satellite through the forward service data interface.

[0047] The Ka-band upconversion channel 132 is connected to the Ka-band relay phased array antenna 120 through the Ka-band upconversion output terminal. The downlink processing unit is connected to the Ka-band upconversion channel 132 through the Ka-band output terminal and the Ka-band upconversion input terminal. The downlink processing unit is connected to the user satellite through the return service data interface.

[0048] When the ground system is not visible to the user satellite, it transmits the Ka-band remote control signal to the relay satellite. The Ka-band relay phased array antenna 120 can receive the Ka-band remote control signal relayed by the relay satellite and input the Ka-band remote control signal to the Ka-band down-conversion channel 131. The Ka-band down-conversion channel 131 performs down-conversion mixing and filtering on the Ka-band remote control signal, and amplifies the Ka-band remote control signal based on a preset gain to obtain the remote control signal, which is then sent to the uplink processing unit.

[0049] The uplink processing unit can be based on, for example Figure 3 The forward link shown demodulates, decodes, and parses frames of the remote control signal to obtain the remote control command. Figure 3 This is a schematic diagram of a forward link provided in an embodiment of this disclosure. For direct commands, the uplink processing unit outputs an OC level signal or an OC pulse signal after decoding. For indirect commands, the uplink processing unit outputs the command to the user satellite via a bus interface.

[0050] The downlink processing unit can receive telemetry data transmitted by user satellites and, based on, such as Figure 4 The return link shown performs AOS framing, channel coding, scrambling, and modulation on the telemetry data to obtain the telemetry signal. Figure 4 This is a schematic diagram of a return link provided in an embodiment of this disclosure.

[0051] Ka-band upconversion channel 132 receives telemetry signals sent by the downlink processing unit, performs upconversion mixing and filtering on the telemetry signals, and amplifies the telemetry signals to obtain Ka-band telemetry signals. The Ka-band telemetry signals are then transmitted to Ka-band relay phased array antenna 120. Ka-band relay phased array antenna 120 transmits the Ka-band telemetry signals to a relay satellite, which then forwards the Ka-band telemetry signals to the ground system.

[0052] Thus, when the ground system is not visible to the user satellite, the onboard multi-mode terminal 100 can process remote control signals relayed by the relay satellite, and can also relay telemetry signals to the ground system through the relay satellite to realize the relay telemetry and control of the user satellite.

[0053] For example, the forward signal also includes a Ka-band uplink signal, the uplink signal also includes an uplink signal, and the uplink data also includes uplink data. The reverse signal also includes a Ka-band data transmission signal, the downlink signal also includes a data transmission signal, and the downlink data also includes data transmission data.

[0054] When the ground system is not visible to the user satellite, it transmits 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 it to the Ka-band downconversion channel 131. The Ka-band downconversion channel 131 performs downconversion mixing and filtering on the Ka-band uplink signal, and amplifies the Ka-band uplink signal based on a preset gain to obtain the uplink signal, which is then sent 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 instructions.

[0055] The downlink processing unit receives data transmitted from user satellites and performs AOS framing, channel coding, scrambling, and modulation on the data transmitted via the return link to obtain a data transmission signal. The Ka-band upconversion channel 132 receives the data transmission signal from the downlink processing unit, performs upconversion mixing and filtering on the data transmission signal, and amplifies the data transmission signal to obtain a Ka-band data transmission signal. This Ka-band data transmission signal is then transmitted to the Ka-band relay phased array antenna 120. The Ka-band relay phased array antenna 120 transmits the Ka-band data transmission signal to the relay satellite, which then forwards the Ka-band data transmission signal to the ground system.

[0056] Thus, when the ground system is not visible to the user satellite, the onboard multi-mode terminal 100 can process the uplink signal relayed by the relay satellite, and can also forward data transmission signals to the ground system through the relay satellite to realize the relay data transmission of the user satellite.

[0057] See also Figure 2The frequency conversion module 130 also includes an X-band down-conversion channel 133 and an X-band measurement and control 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 measurement and control antenna 110 is connected to the X-band down-conversion channel 133 through the X-band down-conversion input terminal. The X-band measurement and control up-conversion channel 134 is connected to the X-band measurement and control antenna 110 through an X-band measurement and control up-conversion output terminal. The control and baseband module 140 is connected to the X-band measurement and control up-conversion channel 134 through an X-band measurement and control output terminal and an X-band measurement and control up-conversion input terminal.

[0058] For example, when the ground system is visible to the user's satellite, the ground system sends an X-band remote control signal to the X-band telemetry and control antenna 110. The X-band telemetry and control antenna 110 then sends the received X-band remote control 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 remote control signal, amplifies the X-band remote control signal, obtains the remote control signal, and sends the remote control signal to the control and baseband module 140.

[0059] The X-band telemetry and control upconversion channel 134 performs upconversion mixing and filtering on the telemetry signal sent by the control and baseband module 140, and amplifies the telemetry signal to obtain the X-band telemetry signal. The X-band telemetry signal is then sent to the X-band telemetry and control antenna 110, which in turn sends the X-band telemetry signal directly to the ground system.

[0060] Thus, when the ground system is visible to the user satellite, the onboard multi-mode terminal 100 can process remote control signals directly sent by the ground system, and can also send telemetry signals directly to the ground system, thereby enabling the user satellite to perform ground tracking and control.

[0061] In summary, the spaceborne multi-mode terminal 100 provided in this embodiment can achieve relay telemetry and data transmission by processing forward signals relayed by relay satellites and forwarding return signals to the ground system through relay satellites when the ground system is not visible to the user satellite. When the ground system is visible to the user satellite, it can achieve ground telemetry and control of the user satellite by processing remote control signals directly sent by the ground system and directly sending telemetry signals to the ground system, thereby improving the coverage and real-time performance of telemetry and control.

[0062] In some embodiments, see continue to see Figure 2 The spaceborne multi-mode terminal 100 also includes an X-band data transmission phased array antenna 150, the control and baseband module 140 includes an X-band data transmission output terminal, and the frequency conversion module 130 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, such as... Figure 5 As shown.

[0063] The X-band data transmission output terminal is connected to the X-band data transmission channel 135 via the X-band data transmission upconversion input terminal, and the X-band data transmission channel 135 is connected to the input terminal of the X-band data transmission phased array antenna 150 via the X-band data transmission upconversion output terminal and the radio frequency cable.

[0064] The X-band telemetry and control antenna 110 is further configured to receive the X-band uplink signal transmitted 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 transmit the X-band data transmission signal to the ground system when the ground system is visible to the user satellite.

[0065] 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 transmitted by the ground system and amplify the X-band uplink signal to obtain the uplink signal.

[0066] For example, when the ground system is visible to the user's satellite, the ground system sends the X-band uplink signal to the X-band telemetry and control antenna 110, which then sends the received X-band uplink signal to the X-band downconversion channel 133. The X-band downconversion channel 133 performs downconversion processing on the X-band uplink signal to obtain the uplink signal, and then sends the uplink signal to the control and baseband module 140.

[0067] 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, and amplifies the data transmission signal to obtain the X-band data transmission signal. The X-band data transmission signal is then sent to the X-band data transmission phased array antenna 150, which in turn sends the X-band data transmission signal directly to the ground system.

[0068] Thus, when the ground system is visible to the user satellite, the onboard multi-mode terminal 100 can process the uplink signals directly sent by the ground system, and can also send the data transmission signals directly to the ground system, realizing high-speed data transmission between the user satellite and the ground.

[0069] In some embodiments, Figure 5 This is a schematic diagram of the structure of an X-band downconversion channel provided in an embodiment of this disclosure, as shown below. Figure 5 As shown, the X-band downconversion 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.

[0070] For example, the output of the X-band telemetry and control antenna 110 is connected to the input of the first low-noise amplifier LNA1 via an RF cable. The output of the first low-noise amplifier LNA1 is connected to the X-band input via a first filter F1, a second low-noise amplifier LNA2, a first mixer M1, a second filter F2, a first amplifier A1, a first voltage-controlled attenuator VCA1, a second mixer M2, a third filter F3, a first voltage-controlled gain amplifier VGA1, a second voltage-controlled gain amplifier VGA2, and a second amplifier A2. The first drive signal is connected to the control terminal of the first mixer M1 via the first drive amplifier DA1, and the second drive signal is connected to the control terminal of the second mixer M2.

[0071] The X-band downconversion channel 133 adopts a two-stage frequency conversion scheme. By adjusting the control voltage 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 downconversion channel 133 can be dynamically adjusted.

[0072] In some embodiments, Figure 6 This is a schematic diagram of the structure of an X-band measurement and control upconversion channel provided in an embodiment of this disclosure, as shown below. Figure 6 As shown, the X-band measurement and control upconversion 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.

[0073] For example, the X-band measurement and control output terminal is connected to the input terminal of the isolator IS in sequence 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 terminal of the isolator IS is connected to the input terminal of the X-band measurement and control antenna 110 through an RF cable. The third drive signal is connected to the control terminal of the third mixer M3 through the fourth drive amplifier DA4.

[0074] The control and baseband module 140 includes a quadrature modulator IQ. The control terminal of the quadrature modulator IQ is connected to the modulation drive signal. The quadrature modulator IQ works in conjunction with the X-band measurement and control upconversion channel 134 to realize a two-stage frequency conversion scheme.

[0075] In some embodiments, Figure 7 This is a schematic diagram of the structure of an X-band data transmission channel provided in an embodiment of the present disclosure, as shown below. Figure 7As shown, the X-band data transmission channel 135 includes: a low-pass filter LPF, a digitally 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.

[0076] For example, the X-band digital transmission output terminal is connected to the X-band digital transmission phased array antenna 150 in sequence through a low-pass filter LPF, a digitally 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 terminal of the fourth mixer M4 through the fifth drive amplifier DA5.

[0077] The digital-to-analog converter in the control and baseband module 140 outputs the X-band intermediate frequency signal. The X-band data transmission channel 135 filters, amplifies, and mixes the X-band intermediate frequency signal before outputting the radio frequency signal. The gain can be adjusted from 0 to 15 dBm by adjusting the attenuation of the digitally controlled attenuator (DCA), and the frequency can be adjusted by modifying the L0 frequency point.

[0078] In some embodiments, Figure 8 This is a schematic diagram of another spaceborne multi-mode terminal provided in an embodiment of this disclosure, as shown below. Figure 8 As shown, the onboard multi-mode terminal also includes a power supply module 160. The input terminal of the power supply module 160 is connected to the user satellite, and the multiple output terminals of the power supply module 160 are respectively electrically connected to the power supply terminals of the X-band data transmission phased array antenna 150, the Ka-band relay phased array antenna 120, the control and baseband module 140, and the frequency conversion module 130.

[0079] The power module 160 is configured to supply power to the Ka-band relay phased array antenna 120 when the ground system is not visible to the user satellite, so as to enable the Ka-band relay phased array antenna 120 to operate; and to supply power to the X-band data transmission phased array antenna 150 when the ground system is visible to the user satellite, so as to enable the X-band data transmission phased array antenna 150 to operate.

[0080] For example, the power module 160 continuously supplies power to the control and baseband module 140 and the frequency conversion module 130, and supplies power to the Ka-band relay phased array antenna 120 and / or the X-band data transmission phased array antenna 150 based on OC commands. When the ground system is not visible to the user satellite, the power module 160 receives a first OC command, and based on the first OC command, 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 operates and the X-band data transmission phased array antenna 150 stops operating, thereby reducing unnecessary energy waste.

[0081] When the ground system is visible to the user satellite, the power 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 can work and the Ka-band relay phased array antenna 120 can stop working, thereby reducing unnecessary energy waste.

[0082] This disclosure also provides a data processing method, which is applied to the spaceborne multi-mode terminal 100 provided in any of the above embodiments.

[0083] Figure 9 This is a flowchart illustrating a data processing method provided in an embodiment of the present disclosure, as shown below. Figure 9 As shown, the specific steps of the data processing method include:

[0084] S101, determine whether the ground system is visible to the user satellite.

[0085] For example, based on the user satellite's pose information, the ground system's position information, and the relay satellite's position information, it can be determined whether the ground system is visible to the user satellite. If the ground system is not visible to the user satellite, S102-S105 are executed; if the ground system is visible to the user satellite, S102'-S105' are executed.

[0086] S102 receives the forward signal relayed by the relay satellite and performs down-conversion processing on the forward signal to obtain the uplink signal.

[0087] For example, the forward signal includes Ka-band remote control signal and Ka-band uplink signal, the uplink signal includes remote control signal and uplink signal, and the uplink data includes remote control command and uplink data.

[0088] 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. The Ka-band relay phased array antenna can receive the Ka-band remote control signal relayed by the relay satellite, perform down-conversion mixing and filtering on the Ka-band remote control signal based on the Ka-band down-conversion channel, and amplify the Ka-band remote control signal based on the preset gain to obtain the remote control signal.

[0089] The ground system transmits the Ka-band uplink signal to the relay satellite. The Ka-band relay phased array antenna can receive the uplink remote control signal relayed by the relay satellite. The Ka-band uplink signal is downconverted, mixed, and filtered using the Ka-band downconversion channel, and then amplified with a preset gain to obtain the uplink signal.

[0090] S103 processes the uplink signal to obtain uplink data and then sends the uplink data to the user satellite.

[0091] For example, based on the forward link of the control and baseband module, the remote control signal is demodulated, decoded, and frame parsed to obtain the remote control command. For direct commands, an OC level signal or OC pulse signal is output after decoding; for indirect commands, the signal is output to the user satellite via the bus interface. Based on the forward link of the control and baseband module, the uplink signal is demodulated to obtain uplink data, which is then stored. Based on the command, the uplink data is output to the user satellite via the bus interface.

[0092] S104 processes the downlink data transmitted by the user satellite to obtain the downlink signal.

[0093] For example, the backhaul signal includes Ka-band telemetry signal and Ka-band data transmission signal, the downlink signal includes telemetry signal and data transmission signal, and the downlink data includes telemetry data and data transmission data.

[0094] The control and baseband module receives telemetry data transmitted from user satellites and performs AOS framing, channel coding, scrambling, and modulation on the telemetry data via the return link in the control and baseband module to obtain the telemetry signal. Similarly, the control and baseband module receives data transmission data transmitted from user satellites and performs AOS framing, channel coding, scrambling, and modulation on the data transmission data via the return link in the control and baseband module to obtain the data transmission signal.

[0095] S105 performs up-conversion processing on the downlink signal to obtain the return signal, and sends the return signal to the relay satellite so that the relay satellite can forward the return signal to the ground system.

[0096] For example, when the ground system is not visible to the user satellite, the data transmission signal received by the control and baseband module based on the Ka-band upconversion channel is upconverted, mixed and filtered, and amplified to obtain the Ka-band data transmission signal. The Ka-band data transmission signal is then transmitted to the relay satellite through the Ka-band relay phased array antenna, so that the relay satellite can then forward the Ka-band data transmission signal to the ground system.

[0097] Based on the telemetry signals received by the Ka-band upconversion channel and the baseband module, the telemetry signals are upconverted, mixed, and filtered, and then amplified to obtain Ka-band telemetry signals. The Ka-band telemetry signals are then transmitted to a relay satellite via a Ka-band relay phased array antenna, so that the relay satellite can then forward the Ka-band telemetry signals to the ground system.

[0098] S102' receives the X-band remote control signal sent by the ground system and performs down-conversion processing on the X-band remote control signal to obtain the uplink signal.

[0099] For example, when the ground system is visible to the user's satellite, the X-band telemetry and control antenna can receive the X-band remote control signal directly sent by the ground system, perform down-conversion mixing and filtering on the X-band remote control signal based on the X-band down-conversion channel, and amplify the X-band remote control signal to obtain the remote control signal.

[0100] S103' processes the uplink signal to obtain uplink data and then sends the uplink data to the user satellite.

[0101] For example, the same as S103, see the relevant description of S103 for details.

[0102] S104' processes the downlink data transmitted by the user satellite to obtain the downlink signal.

[0103] For example, the same as S104, see the relevant description of S104 for details.

[0104] S105' performs up-conversion processing on the downlink signal to obtain the X-band telemetry signal, and then sends the X-band telemetry signal to the ground system.

[0105] For example, when the ground system is visible to the user's satellite, it receives telemetry signals sent by the control and baseband modules based on the X-band telemetry and control upconversion channel, performs upconversion mixing and filtering on the telemetry signals, and amplifies the telemetry signals to obtain the X-band telemetry signals. The X-band telemetry signals are then directly transmitted to the ground system through the X-band telemetry and control antenna.

[0106] In this embodiment of the present disclosure, when the ground system is not visible to the user satellite, it receives the forward signal relayed by the relay satellite, performs down-conversion processing on the forward signal to obtain the uplink signal, processes the uplink signal to obtain uplink data, and sends the uplink data to the user satellite. It processes the downlink data sent by the user satellite to obtain the downlink signal, performs up-conversion processing on the downlink signal to obtain the return signal, and sends the return signal to the relay satellite, so that the relay satellite forwards the return signal to the ground system, thereby realizing relay telemetry and control and relay data transmission. When the ground system is visible to the user satellite, it receives the X-band remote control signal sent by the ground system, performs down-conversion processing on the X-band remote control signal to obtain the uplink signal, processes the uplink signal to obtain uplink data, and sends the uplink data to the user satellite. It processes the downlink data sent by the user satellite to obtain the downlink signal, performs up-conversion processing on the downlink signal to obtain the X-band telemetry signal, and sends the X-band telemetry signal directly to the ground system to achieve ground tracking and control. In this way, tracking and control can be carried out even outside the visible arc of the ground, which can improve the coverage and real-time performance of tracking and control.

[0107] In some embodiments, a specific description of a possible implementation of S102' is as follows:

[0108] Receives X-band upsampling signals transmitted by the ground system.

[0109] For example, the X-band uplink signal is received directly from the ground system using the X-band telemetry and control antenna. The X-band uplink signal is then downconverted using the X-band downconversion channel and amplified to obtain the uplink signal.

[0110] Based on the above embodiments, after executing S105', the following is also included:

[0111] The downlink signal is upconverted, mixed, and filtered, and then amplified to obtain the X-band data transmission signal, which is then sent to the ground system.

[0112] For example, the data transmission signal sent by the control and baseband module is up-converted, mixed, and filtered based on the X-band data transmission channel, and the data transmission signal is amplified to obtain the X-band data transmission signal. The X-band data transmission signal is then directly transmitted to the ground system through the X-band data transmission phased array antenna.

[0113] In this embodiment of the disclosure, when the ground system is visible to the user satellite, the downlink signal is upconverted, mixed, and filtered by receiving the X-band uplink signal sent by the ground system, and the downlink signal is amplified to obtain the X-band data transmission signal. The X-band data transmission signal is then sent to the ground system to realize high-speed data transmission between the user satellite and the ground.

[0114] Unless otherwise expressly indicated by the context, the singular form of words used herein and in the appended claims includes the plural form, and vice versa. Thus, when referring to the singular, the plural form of the corresponding term is generally included. Similarly, the terms “comprising” and “including” shall be interpreted as including rather than exclusively. Likewise, the terms “including” and “or” shall be interpreted as including unless such interpretation is expressly prohibited herein. Where the term “example” is used herein, particularly when it follows a set of terms, the “example” is merely exemplary and illustrative and should not be considered exclusive or extensive.

[0115] Further aspects and scope of adaptation become apparent from the description provided herein. It should be understood that various aspects of this disclosure may be implemented individually or in combination with one or more other aspects. It should also be understood that the descriptions and specific embodiments herein are for illustrative purposes only and are not intended to limit the scope of this disclosure.

[0116] Several embodiments of this disclosure have been described in detail above. However, it is obvious that those skilled in the art can make various modifications and variations to the embodiments of this disclosure without departing from the spirit and scope of this disclosure. The scope of protection of this disclosure is defined by the appended claims.

Claims

1. A spaceborne multi-mode terminal, characterized in that, Mounted on a user satellite, the onboard multi-mode terminal includes: an X-band data transmission phased array antenna, an X-band telemetry 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 forward signals relayed by the relay satellite and send return signals to the relay satellite when the ground system is not visible to the user satellite, so that the relay satellite forwards the return signals to the ground system. The X-band telemetry and control antenna is configured to receive X-band remote control signals sent by the ground system and X-band uplink signals sent by the ground system when the ground system is visible to the user satellite, and to send X-band telemetry signals to the ground system. The X-band data transmission phased array antenna is configured to transmit X-band data transmission signals to the ground system when the ground system is visible to the user satellite. The control and baseband module is configured to process downlink data transmitted by the user satellite to obtain downlink signals, process uplink signals transmitted by the frequency conversion module to obtain uplink data, and transmit 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, perform up-conversion mixing and filtering on the downlink signal, and amplify the downlink signal to obtain the X-band data transmission signal, perform down-conversion processing on the X-band remote control signal to obtain the uplink signal, and perform down-conversion mixing and filtering on the X-band uplink signal, and amplify the X-band uplink signal to obtain the uplink signal; The forward signals include Ka-band remote control signals and Ka-band uplink signals; the uplink signals include remote control signals and uplink signals; the uplink data includes remote control commands and uplink data; the return signals include Ka-band telemetry signals and Ka-band data transmission signals; the downlink signals include telemetry signals and data transmission signals; and the downlink data includes telemetry data and data transmission data.

2. The spaceborne 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 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 spaceborne multi-mode terminal according to claim 1, characterized in that, The frequency conversion module includes: a Ka-band upconversion channel, a Ka-band downconversion channel, an X-band downconversion channel, and an X-band measurement and control upconversion channel; The Ka-band upconversion channel is configured to perform upconversion mixing and filtering on the downlink signal, and amplify the downlink signal to obtain the return signal; The X-band telemetry and control upconversion channel is configured to perform upconversion mixing and filtering on the downlink signal, and amplify the downlink signal to obtain the X-band telemetry signal; The Ka-band downconversion channel is configured to perform downconversion 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 downconversion channel is configured to perform downconversion 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 spaceborne 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 perform up-conversion mixing and filtering on the downlink signal and amplify the downlink signal when the ground system is visible to the user satellite, in order to obtain the X-band data transmission signal. The X-band downconversion channel is further configured to perform downconversion 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 spaceborne multi-mode terminal according to claim 3, characterized in that, The X-band downconversion 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 telemetry and control antenna is connected to the X-band input terminal of the control and baseband module in sequence 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. The first drive signal is connected to the control terminal of the first mixer through the first drive amplifier, and the second drive signal is connected to the control terminal of the second mixer. Specifically, the output signal of the X-band downconversion 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.

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

7. The spaceborne multi-mode terminal according to claim 4, 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 driver amplifier; The X-band digital transmission output terminal of the control and baseband module is connected to the X-band digital transmission phased array antenna in sequence 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. The fourth drive signal is connected to the control terminal of the fourth mixer through the fifth drive amplifier.

8. The spaceborne multi-mode terminal according to claim 1 or 7, characterized in that, The spaceborne multi-mode terminal also includes a power module; The power 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 as to enable the Ka-band relay phased array antenna to operate; and to supply power to the X-band data transmission phased array antenna when the ground system is visible to the user satellite, so as to enable the X-band data transmission phased array antenna to operate.

9. A data processing method for a spaceborne multi-mode terminal, characterized in that, Applied to the spaceborne multi-mode terminal according to any one of claims 1-8, the method includes: When the ground system is not visible to the user satellite, it receives the forward signal relayed by the relay satellite and performs down-conversion processing on the forward signal to obtain the uplink signal. The forward signal includes Ka-band remote control signal and Ka-band uplink signal, and the uplink signal includes remote control signal and uplink signal. When the ground system is visible to the user satellite, it receives the X-band remote control signal and the X-band uplink signal sent by the ground system, performs down-conversion processing on the X-band remote control signal to obtain the uplink signal, performs down-conversion mixing and filtering on the X-band uplink signal, and amplifies the X-band uplink signal to obtain the uplink signal. The uplink signal is processed to obtain uplink data, and the uplink data is sent to the user satellite. The uplink data includes remote control commands and uplink data. The method further includes: The downlink data transmitted by the user satellite is processed to obtain a downlink signal. The downlink data includes telemetry data and data transmission data, and the downlink signal includes telemetry signal and data transmission signal. When the ground system is not visible to the user satellite, it performs up-conversion processing on the downlink signal to obtain a return signal, and sends the return signal to the relay satellite so that the relay satellite forwards the return signal to the ground system. The return signal includes Ka-band telemetry signal and Ka-band data transmission signal. When the ground system is visible to the user satellite, it performs up-conversion processing on the downlink signal to obtain an X-band telemetry signal, performs up-conversion mixing and filtering on the downlink signal, and amplifies the downlink signal to obtain an X-band data transmission signal, and sends the X-band telemetry signal and the X-band data transmission signal to the ground system.

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