Inter-satellite telemetry data acquisition processing and remote control issuing generation circuit

Abstract

The invention provides an inter-satellite telemetry data acquisition processing and remote control issuing generation circuit, which is characterized in that when a service working mode is entered, a comprehensive management module receives a ground remote control instruction, configures service working parameters and then enters an uplink signal receiving process, and the uplink signal receiving process comprises the following steps: receiving a channel processing signal and acquiring the channel processing signal through a transceiving channel module; the signal processing module is used for carrying out digital signal processing, transmitting the processed signal to the data acquisition and modulation output module, modulating the output signal, outputting a modulation signal to the transceiving channel module, and outputting the modulation signal to the routing exchange single machine; when an on-orbit self-inspection mode is entered, under a ground remote control instruction, the feed baseband module generates self-inspection data, the self-inspection data is compared with a technical state before emission, and an on-orbit state of the feed baseband module is determined. And the efficiency of transmitting satellite data to the ground or the satellite is effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of satellite communication transmission technology, and in particular to an inter-satellite telemetry data acquisition and processing and remote control transmission generation circuit. Background Art

[0002] As an important part of current communication technology, satellite communication has experienced rapid development in technology and application. In recent years, the widespread application of microwave communication technology has also derived many requirements: large-scale data transmission on satellites, inter-satellite signal acquisition and data processing, and storage and forwarding exchange and other technical requirements. In addition, on-board processing technology directly processes inter-satellite signals on satellites instead of simply forwarding them. In high-speed satellite communication systems, the use of VCM / ACM systems is still in its infancy, but the symbol rate is often high (100M~1000Msps). Therefore, the requirements for high-speed data acquisition, processing and transmission in the ka-band and q / v-band, stable communication operation on satellites, etc., are also difficult problems that need to be overcome in hardware circuit design and implementation. In terms of radiation-resistant design, there are also the following considerations: for all devices in the circuit, the problems existing in aerospace communications must be considered, such as radiation resistance, safety, reliability, long-life operation, storage temperature, vibration, cost, etc.

[0003] Therefore, how to efficiently transmit more on-board data to the ground or satellite through comprehensive processing extension has become a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0004] The present invention provides an inter-satellite telemetry data acquisition and processing and remote control transmission generation circuit, which is used to solve the defect of low efficiency of transmitting satellite data to the ground or satellite in the prior art.

[0005] In a first aspect, the present invention provides an intersatellite telemetry data acquisition and processing and remote control downlink generation circuit, comprising: a transceiver channel module, a data acquisition and modulation output module, a signal processing module and a comprehensive management module; When entering the business working mode, the integrated management module receives the ground remote control command, controls the signal processing module to configure the business working parameters, and then enters the uplink signal receiving process; The uplink signal receiving process includes: receiving a channel processing signal through a transceiver channel module; collecting the channel processing signal through the data acquisition and modulation output module and transmitting it to the signal processing module; after digital signal processing through the signal processing module, transmitting it to the data acquisition and modulation output module; after modulating the output signal through the data acquisition and modulation output module, outputting the modulated signal to the transceiver channel module; outputting the modulated signal to the routing switch unit through the transceiver channel module; When entering the on-orbit self-test mode, under the ground remote control command, the feed baseband module generates self-test data, and compares the self-test data with the technical status before launch to determine the on-orbit status of the feed baseband module.

[0006] According to an inter-satellite telemetry data acquisition and processing and remote control downlink generation circuit provided by the present invention, the channel processing signal is received by the transceiver channel module, comprising: An intermediate frequency signal is input through a frequency conversion extension, and the intermediate frequency signal enters a transceiver channel module through a receiving channel; The transceiver channel module amplifies, bandpass filters and digitally controls the attenuation of the intermediate frequency signal to obtain a channel processing signal that complies with the AD chip.

[0007] According to an inter-satellite telemetry data acquisition and processing and remote control downlink generation circuit provided by the present invention, the channel processing signal is collected by the data acquisition and modulation output module and transmitted to the signal processing module, including: The channel processing signal is processed by analog-to-digital conversion, sampling and digital quantization to obtain a sampling signal; Output the converted sampling signal to the signal processing module.

[0008] According to an inter-satellite telemetry data acquisition and processing and remote control downlink generation circuit provided by the present invention, the channel processing signal is processed by analog-to-digital conversion, sampling and digital quantization to obtain a sampling signal, including: The receiving center frequency is set by using fixed AD sampling frequency and variable phase control word NCO; According to the bandpass sampling Nyquist theorem, lossless sampling and quantization of a preset frequency range within the receiving center frequency point are completed to obtain a sampled signal.

[0009] According to the inter-satellite telemetry data acquisition and processing and remote control transmission generation circuit provided by the present invention, the digital signal is processed by the signal processing module and then transmitted to the data acquisition and modulation output module, comprising: The signal processing module performs baseband modulation, demodulation and encoding and decoding digital processing on the sampled signal to obtain a conversion signal; The converted signal is subjected to digital domain carrier recovery, symbol synchronization, blind equalization, frame synchronization, channel decoding and descrambling processing to obtain a digital signal.

[0010] According to an intersatellite telemetry data acquisition and processing and remote control downlink generation circuit provided by the present invention, after the data acquisition and modulation output module modulates the output signal, the modulated signal is output to the transceiver channel module, including: Configure the fixed DA sampling frequency, DA chip modulation, and the transmission center frequency of the variable phase control word NCO center frequency; Based on the transmission center frequency, the digital signal is output to the DAC chip for digital-to-analog conversion to obtain a modulated signal that is output to the transceiver channel module.

[0011] According to an inter-satellite telemetry data acquisition and processing and remote control downlink generation circuit provided by the present invention, the modulated signal is output to a routing switch stand-alone through the transceiver channel module, comprising: Inputting the modulation signal to a digitally controlled attenuator to adjust the amplitude of the intermediate frequency output signal; The intermediate frequency signal with the adjusted amplitude is output to the link layer, and is unpacked by the link layer and output to the routing switch unit.

[0012] According to the present invention, a satellite telemetry data acquisition and processing and remote control downlink generation circuit also includes: after controlling the signal processing module to configure the service working parameters, entering the downlink signal sending process; The downlink signal transmission process includes: receiving data transmitted by the routing switch stand-alone through the transceiver channel module; The data is cached, and after being packaged and processed at the link layer and the physical layer, the data acquisition and modulation output module modulates the output signal, and then outputs it to the ground terminal through the transceiver channel module.

[0013] According to a satellite telemetry data acquisition and processing and remote control transmission generation circuit provided by the present invention, the feed baseband module generates self-test data, including: The integrated management module responds to the ground remote control command, collects the power information of the feeding baseband module, and feeds it back to the satellite platform.

[0014] According to an intersatellite telemetry data acquisition and processing and remote control downlink generation circuit provided by the present invention, the self-test data is compared with the technical status before launch to determine the on-orbit status of the feed baseband module, including: After receiving the on-orbit self-test command, the integrated management module verifies and compares the system parameters and program data in the memory, and feeds back the verification results through telemetry information; After receiving the signal processing module program loading instruction, the integrated management module autonomously completes the signal processing module program loading and monitors the loading status. The signal processing module enters the self-test mode, performs on-orbit self-test of DDR, AD, DA, interface, clock, signal quality components and status, and transmits the self-test results through telemetry information; Based on the verification result and the self-test result, the on-orbit status of the feed baseband module is determined by comparing the technical status of the payload before and after launch.

[0015] The invention provides an intersatellite telemetry data acquisition and processing and remote control downlink generation circuit, comprising: a transceiver channel module, a data acquisition and modulation output module, a signal processing module and an integrated management module; when entering a business working mode, the integrated management module receives a ground remote control instruction, controls the signal processing module to configure business working parameters, and then enters an uplink signal receiving process; the uplink signal receiving process comprises: receiving a channel processing signal through the transceiver channel module; collecting the channel processing signal through the data acquisition and modulation output module, and transmitting it to the signal processing module; performing digital signal processing through the signal processing module, and transmitting it to the data acquisition and modulation output module; performing modulated output signal through the data acquisition and modulation output module, and outputting the modulated signal to the transceiver channel module; outputting the modulated signal to a routing switch unit through the transceiver channel module; when entering an on-orbit self-test mode, under a ground remote control instruction, the feed baseband module generates self-test data, compares the self-test data with the technical state before launch, and determines the on-orbit state of the feed baseband module; because the integrated management module can realize the control of data transmission under different modes, the efficiency of transmitting satellite data to the ground or satellite is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the principle of the intersatellite telemetry data acquisition and processing and remote control transmission generation circuit provided by this embodiment; Figure 2 yes Figure 1 The working flow diagram of the circuit in the figure; Figure 3 is a schematic diagram of a receiving channel workflow provided by this embodiment; Figure 4 It is a schematic diagram of the on-orbit self-check process provided by this embodiment. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Figure 1Schematic diagram of the principle of the intersatellite telemetry data acquisition and processing and remote control transmission generation circuit provided by this embodiment. Figure 2 yes Figure 1 Flowchart of the circuit.

[0020] Figure 1 Input 1 and Input 2 represent input signals, Output 1 and Output 2 represent output signals, DDR3 2G represents a DDR chip with a capacity of 2G, AD represents analog-to-digital conversion, DA represents digital-to-analog conversion, FPGA-A, FPGA-B, and FPGA-C represent controllers, AGC represents gain control, and POWER represents power supply. Figure 2 ADC1 represents analog-to-digital conversion, DAC1 represents digital-to-analog conversion, anti-fuse FPGA represents FPGA equipped with anti-fuse function, RS422 represents low-speed data interface, and GTH x1 represents 1 high-speed data interface.

[0021] like Figure 1 and Figure 2 As shown, an intersatellite telemetry data acquisition and processing and remote control downlink generation circuit provided by an embodiment of the present invention includes: a transceiver channel module 1, a data acquisition and modulation output module 2, a signal processing module 3 and an integrated management module 4. Among them, when entering the business working mode, the integrated management module 4 receives the ground remote control command, controls the signal processing module 3 to configure the business working parameters, and then enters the uplink signal receiving process; the uplink signal receiving process includes: receiving the channel processing signal through the transceiver channel module 1; collecting the channel processing signal through the data acquisition and modulation output module 2, and transmitting it to the signal processing module 3; after performing digital signal processing through the signal processing module 3, transmitting it to the data acquisition and modulation output module 2; after modulating and outputting the signal through the data acquisition and modulation output module 2, outputting the modulated signal to the transceiver channel module 1; outputting the modulated signal to the routing switch unit through the transceiver channel module 1; when entering the on-orbit self-test mode, under the ground remote control command, the feed baseband module generates self-test data, compares the self-test data with the technical status before launch, and determines the on-orbit status of the feed baseband module.

[0022] In a specific implementation process, it is divided into business working mode and on-orbit self-checking mode, and the corresponding mode is executed according to the ground remote control command. When entering the business working mode, the working parameters are configured first. Under the ground remote control command, the integrated management module 4 controls the signal processing module 3 to load the program (and refreshes the signal processing module 3 program in real time during the working process), then the signal processing module 3 configures the corresponding parameters of the business work, and finally the signal processing module 3 enters the working mode, which is divided into: uplink signal reception and downlink signal transmission.

[0023] After entering the uplink signal reception, the main processes include: the transceiver channel module 1 receives the channel processing signal, the data acquisition and modulation output module collects the signal, the signal processing module 3 performs signal processing, the data acquisition and modulation output module modulates the output signal, and the transceiver channel unit sends the channel processing signal.

[0024] Among them, receiving the channel processing signal through the transceiver channel module 1 includes: inputting the intermediate frequency signal through the frequency conversion extension, the frequency conversion extension includes the ka frequency conversion extension or the q / v frequency conversion extension, and the intermediate frequency signal is a signal with a bandwidth of 900Mhz and an intermediate frequency point of 2.2Ghz. The intermediate frequency signal enters the transceiver channel module 1 through the receiving channel, and enters the circuit through the two receiving channels (each channel ≥2.5Gbps) in the transceiver channel module 1. The transceiver channel module 1 amplifies, bandpass filters and digitally controls the attenuation of the intermediate frequency signal to obtain a channel processing signal that meets the AD chip.

[0025] like Figure 3 The figure shows the working process of the receiving channel. The receiving channel is mainly composed of a bandpass filter, a gain amplifier module and a digitally controlled attenuator. The intermediate frequency input signal is amplified by the amplifier, and then the amplified signal is bandpass filtered by the attenuator and the filter. The filtered signal is then automatically gain-gated (AGC) by the amplifier, which can achieve an attenuation range of 0.5-31.5dB, an insertion loss of 3.0dB, and an adjustment accuracy of 0.5dB within the operating frequency range of 0.1-12GHz; the gain is 30dB automatic gain control, and the noise figure is only 2.0dB. Through the receiving channel, the signal after gain control meets the signal input range of the AD chip (-35-0dBm).

[0026] The channel processing signal is collected by the data acquisition and modulation output module 2 and transmitted to the signal processing module 3, including: the channel processing signal is processed by analog-to-digital conversion, sampling and digital quantization to obtain a sampling signal, and the receiving center frequency is set by a fixed AD sampling frequency and a variable phase control word NCO; according to the bandpass sampling Nyquist theorem, the lossless sampling and quantization of the preset frequency range within the receiving center frequency is completed to obtain a sampling signal. The converted sampling signal is output to the signal processing module 3.

[0027] Specifically, a signal with a constant amplitude is output to the data acquisition and modulation output module 2. The signal is first processed by high-speed AD for analog-to-digital conversion, sampling, and digital quantization. The AD sampling accuracy is 8 bits, the sampling rate is as high as 3.0GSPS, and when fin is 1.5GHz, the ENOB reaches 6.5bits, and the power consumption is only 1.9W. The receiving center frequency is set by a fixed AD sampling frequency and a variable phase control word NCO, where the AD sampling frequency is fixed to 2.2G. According to the bandpass sampling Nyquist theorem, lossless sampling of signals within the frequency range of 1.1-2.2GHz can be completed. This type of sampling can, on the one hand, receive intermediate frequency signals within the intermediate frequency of 1.6GHz and the bandwidth of 900MHz without loss, and on the other hand, it can also support users to adjust the intermediate frequency point according to needs within the allowed intermediate frequency input and output frequency range (1.1-2.1GHz); the NCO phase control word is quantized with 32bits, and each bit step can support up to 1.16Hz, meeting the adjustable step requirement of 1KHz. The signal after the sampling rate output conversion is sent to the back-end signal processing unit.

[0028] Among them, after being processed by the signal processing module 3, the digital signal is transmitted to the data acquisition and modulation output module 2. The signal processing unit includes two high-performance FPGA processing chips. The signal processing module 3 performs digital processing functions such as baseband modulation, demodulation and encoding and decoding on the sampled signal to obtain the conversion signal; the conversion signal is subjected to a series of signal processing such as digital domain carrier recovery, symbol synchronization, blind equalization, frame synchronization, channel decoding and descrambling, and the digital signal is output to the data acquisition and modulation output unit.

[0029] Among them, after the output signal is modulated by the data acquisition and modulation output module 2, the modulated signal is output to the transceiver channel module 1. The processed signal is then output to the DAC chip for digital-to-analog conversion, using a single-channel, low-power digital-to-analog converter with a sampling rate of up to 4.5GSPS; it has a resolution of 12 bits, supports four output modes of RTZ, NRZ, NRTZ, and RF, has a working power consumption of 2.6W, and uses the LVDS differential interface data input method to complete the digital-to-analog conversion of the signal. Configure the fixed DA sampling frequency, DA chip modulation, and the transmission center frequency of the variable phase control word NCO center frequency. The DA sampling frequency is fixedly set to 2.5G frequency, which can support the digital-to-analog conversion of the maximum 1000Msps baseband signal, and the NCO phase control word is quantized with 32 bits. This method, on the one hand, can support users to adjust the intermediate frequency point according to needs within the allowed intermediate frequency input and output frequency range (1.1-2.1GHz). On the other hand, each bit step can support up to 0.58Hz, meeting the adjustable step requirement of 1KHz. After the DAC chip performs digital-to-analog conversion, it outputs the modulated signal to the transmission channel.

[0030] Among them, the modulated signal is output to the routing switch unit through the transceiver channel module 1, including inputting the modulated signal to the digital attenuator. The transmission channel is mainly composed of a digital attenuator, which can achieve a 30dB intermediate frequency output signal amplitude adjustment range; within the 0.1-12GHz operating frequency range, the insertion loss is 3.0dB, the attenuation range is 0.5-31.5dB, and the adjustment accuracy is 0.5dB. Then adjust the amplitude of the intermediate frequency output signal, output the intermediate frequency signal with the adjusted amplitude to the link layer, and output it to the routing switch unit after being unpacked by the link layer.

[0031] Thus, the entire uplink signal receiving process is completed. After the control signal processing module 3 configures the service working parameters, it enters the downlink signal sending process. The downlink signal sending process includes: receiving the data sent by the routing switch stand-alone through the transceiver channel module 1; caching the data, and after the link layer performs packet processing and physical layer processing (including encoding, mapping, framing, and scrambling), the data acquisition and modulation output module 2 modulates the output signal, and then outputs it to the ground terminal through the transceiver channel module 1. The relevant working parameters are the same as the uplink signal sending process.

[0032] In the satellite data interaction service mode, including uplink signal transmission and downlink signal reception, the relevant working parameters are as follows: Communication system: DVB-S2-like, signal bandwidth 900MHz, number of channels 4, intermediate frequency output level -10±1dBm, intermediate frequency input level -35~0dBm, bit error rate ≤1×10 -7 , symbol rate 750Msps, modulation mode supports QPSK, 8PSK, 16APSK, and adapts to the maximum Doppler frequency deviation better than ±1.2MHz.

[0033] Furthermore, the on-orbit self-test mode is explained in detail. After the satellite is launched into orbit, the feed baseband module enters the self-test mode according to the ground remote control command, and performs a self-test on the technical status of the feed baseband module to evaluate the impact of severe vibration and impact during rocket launch and satellite-rocket separation, as well as changes in environmental factors after entering orbit on the feed baseband module. The on-orbit self-test is performed under the ground remote control command. The on-orbit self-test process will generate self-test data, which needs to be transmitted to the ground station for comparison and analysis with the technical status before launch to evaluate the on-orbit status of the feed baseband module. The on-orbit self-test can also be carried out multiple times according to the satellite mission schedule.

[0034] Figure 4 Schematic diagram of the on-orbit self-check process provided by this embodiment. Figure 4As shown in the figure, the specific process is that after the satellite is launched into orbit, the payload is powered on. After the circuit is powered on, the integrated management module 4 completes self-starting, responds to the satellite platform remote control command, and feeds back telemetry information. The integrated management module 4 collects the power supply information of the feed baseband module, including power supply voltage, current, voltage module temperature, etc., and feeds back to the satellite platform through telemetry information.

[0035] After receiving the on-orbit self-test instruction, the integrated management module 4 verifies and compares the system parameters and program data in the memory, and feeds back the verification results through telemetry information. After receiving the program loading instruction of the signal processing module 3, the integrated management module 4 independently completes the program loading of the signal processing module 3 and monitors the loading status. The signal processing module 3 enters the self-test mode, performs on-orbit self-test of DDR, AD, DA, interface, clock, signal quality components and status, and transmits the self-test results through telemetry information, and controls the power off of the payload. Based on the verification results and self-test results, the telemetry information is compared and analyzed, the system status is judged, the technical status of the payload before and after launch is compared, and the on-orbit status of the feed baseband module is determined. If the self-test passes, the self-test ends. If the self-test fails, fault analysis and re-self-test are performed, and the self-test process is re-executed until the final self-test passes.

[0036] The intersatellite telemetry data acquisition and processing and remote control transmission generation circuit of the present invention is used for data transmission, which has the following advantages: It has the advantages of lossless reception of intermediate frequency and adjustment of intermediate frequency point. Through data acquisition and modulation output module 2, it can support digital-to-analog conversion of maximum 1000Msps baseband signal. The NCO phase control word adopts 32bits quantization to adjust the frequency.

[0037] It has multiple signal receiving and transmitting channels and adopts a 2-receive 2-transmit design. It can receive multiple microwave signals from satellites, and the communication rate of each channel is ≥2.5Gbps.

[0038] The integrated management module 4 controls the signal processing module 3 to perform functions such as FPGA loading, refresh function, process control, and information interaction with the satellite platform.

[0039] It has the advantage of radiation resistance. All circuit components are space-grade components, with a total cumulative radiation dose of ≥20Krad (Si) and single-particle lock ≥37MeV.cm 2 / mg, single event upset ≥15MeV.cm 2 / mg.

[0040] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0041] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A circuit for collecting and processing intersatellite telemetry data and for remotely transmitting data, characterized in that: include: Transceiver channel module, data acquisition and modulation output module, signal processing module and comprehensive management module; When entering the business working mode, the integrated management module receives the ground remote control command, controls the signal processing module to configure the business working parameters, and then enters the uplink signal receiving process; The uplink signal receiving process includes: receiving a channel processing signal through a transceiver channel module; collecting the channel processing signal through the data acquisition and modulation output module and transmitting it to the signal processing module; after digital signal processing through the signal processing module, transmitting it to the data acquisition and modulation output module; after modulating the output signal through the data acquisition and modulation output module, outputting the modulated signal to the transceiver channel module; outputting the modulated signal to the routing switch unit through the transceiver channel module; When entering the on-orbit self-test mode, under the ground remote control command, the feed baseband module generates self-test data, and compares the self-test data with the technical status before launch to determine the on-orbit status of the feed baseband module.

2. The intersatellite telemetry data acquisition and processing and remote control transmission generation circuit according to claim 1 is characterized in that: The receiving the channel processing signal by the transceiver channel module includes: An intermediate frequency signal is input through a frequency conversion extension, and the intermediate frequency signal enters a transceiver channel module through a receiving channel; The transceiver channel module amplifies, bandpass filters and digitally controls the attenuation of the intermediate frequency signal to obtain a channel processing signal that complies with the AD chip.

3. The intersatellite telemetry data acquisition and processing and remote control transmission generation circuit according to claim 1 is characterized in that: The step of collecting the channel processing signal through the data collection and modulation output module and transmitting the signal to the signal processing module includes: The channel processing signal is processed by analog-to-digital conversion, sampling and digital quantization to obtain a sampled signal; Output the converted sampling signal to the signal processing module.

4. The intersatellite telemetry data acquisition and processing and remote control transmission generation circuit according to claim 3 is characterized in that: The channel processing signal is processed by analog-to-digital conversion, sampling and digital quantization to obtain a sampled signal, including: The receiving center frequency is set by using fixed AD sampling frequency and variable phase control word NCO; According to the bandpass sampling Nyquist theorem, lossless sampling and quantization of a preset frequency range within the receiving center frequency point are completed to obtain a sampled signal.

5. The intersatellite telemetry data acquisition and processing and remote control transmission generation circuit according to claim 3 is characterized in that: After the digital signal is processed by the signal processing module, it is transmitted to the data acquisition and modulation output module, including: The signal processing module performs baseband modulation, demodulation and encoding and decoding digital processing on the sampled signal to obtain a conversion signal; The converted signal is subjected to digital domain carrier recovery, symbol synchronization, blind equalization, frame synchronization, channel decoding and descrambling processing to obtain a digital signal.

6. The intersatellite telemetry data acquisition and processing and remote control transmission generation circuit according to claim 5 is characterized in that: After the data acquisition and modulation output module modulates the output signal, the modulated signal is output to the transceiver channel module, including: Configure the fixed DA sampling frequency, DA chip modulation, and the transmission center frequency of the variable phase control word NCO center frequency; Based on the transmission center frequency, the digital signal is output to the DAC chip for digital-to-analog conversion to obtain a modulated signal that is output to the transceiver channel module.

7. The intersatellite telemetry data acquisition and processing and remote control transmission generation circuit according to claim 1 is characterized in that: The step of outputting the modulated signal to a routing switch unit through the transceiver channel module includes: Inputting the modulation signal to a digitally controlled attenuator to adjust the amplitude of the intermediate frequency output signal; The intermediate frequency signal with the adjusted amplitude is output to the link layer, and is unpacked by the link layer and output to the routing switch unit.

8. The intersatellite telemetry data acquisition and processing and remote control transmission generation circuit according to claim 1 is characterized in that: Also includes: After controlling the signal processing module to configure the service working parameters, enter the downlink signal sending process; The downlink signal transmission process includes: receiving data transmitted by the routing switch stand-alone through the transceiver channel module; The data is cached, and after being packaged and processed at the link layer and the physical layer, the data acquisition and modulation output module modulates the output signal, and then outputs it to the ground terminal through the transceiver channel module.

9. The intersatellite telemetry data acquisition and processing and remote control transmission generation circuit according to any one of claims 1 to 8, characterized in that: The feeding baseband module generates self-test data, including: The integrated management module responds to the ground remote control command, collects the power information of the feeding baseband module, and feeds it back to the satellite platform.

10. The intersatellite telemetry data acquisition and processing and remote control transmission generation circuit according to claim 9, characterized in that: The step of comparing the self-test data with the technical status before launch to determine the on-orbit status of the feed baseband module includes: After receiving the on-orbit self-test command, the integrated management module verifies and compares the system parameters and program data in the memory, and feeds back the verification results through telemetry information; After receiving the signal processing module program loading instruction, the integrated management module autonomously completes the signal processing module program loading and monitors the loading status. The signal processing module enters the self-test mode, performs on-orbit self-test of DDR, AD, DA, interface, clock, signal quality components and status, and transmits the self-test results through telemetry information; Based on the verification result and the self-test result, the on-orbit status of the feed baseband module is determined by comparing the technical status of the payload before and after launch.

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