Static meteorological satellite communication module supporting multi-mode transmission and beidou timing

Abstract

The application discloses a static meteorological satellite communication module supporting multi-mode transmission and Beidou timing, and belongs to the technical field of satellite communication and meteorological monitoring. The module comprises a Beidou positioning and timing unit, a satellite communication unit, a modulator, a digital-to-analog converter and an interface unit. The Beidou positioning and timing unit is used for receiving data of a GNSS antenna and generating a PPS signal. The satellite communication unit is used for receiving input data and the PPS signal and generating a communication signal. The digital-to-analog converter is used for receiving the communication signal and converting the communication signal into an analog signal. The modulator is used for modulating the analog signal, obtaining a modulated signal and emitting the modulated signal. The interface unit is used for providing a power supply interface, a UART interface and an I / O interface. By highly integrating the Beidou timing, the satellite communication, signal modulation and conversion and general interface function units in a single module, the volume of the module is reduced, the module can be conveniently embedded into various meteorological acquisition devices as a standard communication component, and the integration degree and performance of the module are improved.

Description

Technical Field

[0001] This application belongs to the field of satellite communication and meteorological monitoring technology, and in particular relates to a geostationary meteorological satellite communication module that supports multi-mode launch and BeiDou timing. Background Technology

[0002] Meteorological satellite data transmission technology, as a core supporting component of the meteorological monitoring system, plays an irreplaceable role in disaster early warning, climate observation, and ecological environment monitoring in areas without terrestrial network coverage, such as plateaus, oceans, and deserts. With increasing demands for observation accuracy and real-time performance, traditional communication methods are facing increasingly prominent bottlenecks in terms of transmission reliability, timing consistency, and ease of operation and maintenance.

[0003] Existing meteorological satellite communication terminals can be mainly divided into two common architectures based on their time synchronization and modulation strategies: fixed time synchronization and dynamic modulation. Fixed time synchronization terminals rely on built-in clocks for data framing and transmission scheduling. Although the structure is simple, it is prone to time drift during long-term operation, making it difficult to achieve high-precision fusion of multi-source observation data and seriously affecting the input quality of forecast models.

[0004] To balance power consumption and cost, existing terminals typically employ a single modulation mode and a preset transmission strategy. However, this approach suffers from inherent defects such as poor adaptability and difficulty in flexibly adjusting according to channel conditions and service priorities. This leads to technical problems such as low transmission success rate, insufficient data timeliness, and difficulty in remote maintenance under complex weather and electromagnetic conditions. Summary of the Invention

[0005] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a geostationary meteorological satellite communication module supporting multi-mode transmission and BeiDou timing. This module highly integrates functional units such as BeiDou timing, satellite communication, signal modulation and conversion, and a universal interface into a single module, and defines clear signal flow and interface standards. This achieves decoupling and modularization of hardware and functions, reduces equipment size, and allows the geostationary meteorological satellite communication module to be easily embedded as a standard communication component into various meteorological acquisition devices. This greatly simplifies the design and integration complexity of field observation systems and improves deployment flexibility and reliability.

[0006] To address the aforementioned problems, according to a first aspect of the present invention, a geostationary meteorological satellite communication module supporting multi-mode transmission and BeiDou timing is provided, the module comprising a BeiDou positioning and timing unit, a satellite communication unit, a modulator, a digital-to-analog converter, and an interface unit;

[0007] The BeiDou positioning and timing unit is used to receive data from the GNSS antenna and generate a PPS signal.

[0008] The satellite communication unit is used to receive input data and PPS signals and generate communication signals;

[0009] The digital-to-analog converter is used to receive communication signals and convert them into analog signals;

[0010] The modulator is used to modulate the analog signal to obtain the modulated signal and transmit it;

[0011] The interface unit is used to provide a power interface, a UART interface, and an I / O interface.

[0012] According to one embodiment of this application, the satellite communication unit includes a main control microcontroller subunit and a baseband processing subunit;

[0013] The main control microcontroller subunit is used to dynamically set the communication rate, modulation method and transmission power according to the received PPS signal;

[0014] The baseband processing subunit, under the control of the main control microcontroller subunit, performs QPSK baseband modulation processing on the input data to generate a communication signal.

[0015] According to one embodiment of this application, the satellite communication unit operates in a frequency band of 400 MHz, can be configured with multiple communication rates, and has a transmission power range of 2–10 W.

[0016] According to one embodiment of this application, the step of performing QPSK baseband modulation processing on the input data to generate a communication signal includes:

[0017] The input data is upsampled by a factor of 10 to obtain the upsampled data.

[0018] The upsampled data is input into a preset rooted cosine digital filter for filtering, and QPSK baseband modulation is completed to generate a communication signal.

[0019] According to one embodiment of this application, the modulation method of the modulator includes single-carrier modulation and QPSK modulation.

[0020] According to one embodiment of this application, the geostationary meteorological satellite communication module includes a timed transmission mode and a random transmission mode.

[0021] According to one embodiment of this application, the BeiDou positioning and timing unit includes a BeiDou positioning subunit and a timing subunit;

[0022] The Beidou positioning subunit is used to receive and process GNSS antenna data and generate positioning data, which includes time information and location information.

[0023] The timing subunit is used to generate a PPS signal based on the positioning data.

[0024] According to one embodiment of this application, the standby current of the geostationary meteorological satellite communication module is less than or equal to a first threshold, and the transmission current of the geostationary meteorological satellite communication module is less than or equal to a second threshold.

[0025] According to a second aspect of the present invention, a geostationary meteorological satellite communication method supporting multi-mode transmission and BeiDou timing is provided, the method comprising:

[0026] It acquires data from the GNSS antenna and input data from the interface unit, sends the GNSS antenna data to the BeiDou positioning and timing unit, and generates a PPS signal.

[0027] The PPS signal and the input data from the interface unit are sent to the satellite communication unit for modulation to generate a communication signal;

[0028] The communication signal is sent to the digital-to-analog converter for conversion to obtain an analog signal;

[0029] The analog signal is sent to the modulator for modulation, and the resulting modulated signal is transmitted through the antenna.

[0030] According to one embodiment of this application, the step of sending GNSS antenna data to the BeiDou positioning and timing unit to generate a PPS signal includes:

[0031] GNSS antenna data is sent to the BeiDou positioning subunit for positioning to obtain positioning data;

[0032] The positioning data is sent to the timing subunit for timing synchronization, generating a PPS signal.

[0033] According to a third aspect of the present invention, an electronic device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the geostationary meteorological satellite communication method supporting multi-mode transmission and BeiDou timing as described in the second aspect above.

[0034] According to a fourth aspect of the present invention, a non-transitory computer-readable storage medium is provided, on which a computer program is stored, wherein when the computer program is executed by a processor, it implements the geostationary meteorological satellite communication method supporting multi-mode transmission and BeiDou timing as described in the second aspect above.

[0035] According to a fifth aspect of the present invention, a chip is provided, the chip including a processor and a communication interface, the communication interface being coupled to the processor, the processor being used to run programs or instructions to implement the geostationary meteorological satellite communication method supporting multi-mode transmission and BeiDou timing as described in the second aspect.

[0036] According to a sixth aspect of the present invention, a computer program product is provided, comprising a computer program that, when executed by a processor, implements the geostationary meteorological satellite communication method supporting multi-mode transmission and BeiDou timing as described in the second aspect above.

[0037] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application.

[0038] The present invention provides a geostationary meteorological satellite communication module that supports multi-mode transmission and BeiDou timing, which has the following advantages over the prior art:

[0039] (1) This invention highly integrates functional units such as BeiDou timing, satellite communication, signal modulation and conversion, and general interfaces into a single module, and defines clear signal flow and interface standards. It achieves decoupling and modularization of hardware and functions, reduces the size of the equipment, and enables the geostationary meteorological satellite communication module to be conveniently embedded as a standard communication component into various meteorological acquisition equipment. This greatly simplifies the design and integration complexity of field observation systems and improves the flexibility and reliability of deployment.

[0040] (2) By dynamically setting the communication rate, modulation method and transmission power according to the PPS signal, and supporting both timed and random transmission modes, the module can adapt to complex channel conditions and changing service requirements. While ensuring high-reliability communication, it significantly reduces the overall energy consumption and operation and maintenance cost of the geostationary meteorological satellite communication module, achieving a unity of performance, flexibility and engineering practicality, and significantly improving the flexibility, accuracy and timeliness of meteorological observation data transmission.

[0041] (3) This invention integrates BeiDou high-precision positioning and PPS timing units, and supports a dynamically configurable communication strategy with dual rates, dual modulations, and dual channels, enabling the module to simultaneously achieve nanosecond-level time synchronization and flexible adaptive signal transmission. This allows meteorological data to carry its own spatiotemporal tags and intelligently adjust transmission parameters according to real-time channel conditions and service priorities, improving the high reliability and timeliness of the returned data. Attached Figure Description

[0042] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0043] Figure 1 This is a schematic diagram of the structure of a geostationary meteorological satellite communication module that supports multi-mode transmission and BeiDou timing, provided in an embodiment of this application.

[0044] Figure 2This is a flowchart illustrating the geostationary meteorological satellite communication method supporting multi-mode launch and BeiDou timing provided in the embodiments of this application;

[0045] Figure 3 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application. Detailed Implementation

[0046] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0047] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0048] The following description, in conjunction with the accompanying drawings, details the geostationary meteorological satellite communication module supporting multi-mode launch and BeiDou timing, the geostationary meteorological satellite communication method supporting multi-mode launch and BeiDou timing, the electronic equipment, and the readable storage medium provided in this application, through specific embodiments and application scenarios.

[0049] Among them, the geostationary meteorological satellite communication method that supports multi-mode launch and BeiDou timing can be applied to the terminal, specifically by the hardware or software in the terminal.

[0050] The terminal includes, but is not limited to, portable communication devices such as mobile phones or tablets with touch-sensitive surfaces (e.g., touchscreen displays and / or touchpads). It should also be understood that, in some embodiments, the terminal may not be a portable communication device, but rather a desktop computer with touch-sensitive surfaces (e.g., touchscreen displays and / or touchpads).

[0051] The following embodiments describe a terminal including a display and a touch-sensitive surface. However, it should be understood that the terminal may include one or more other physical user interface devices such as a physical keyboard, mouse, and joystick.

[0052] The geostationary meteorological satellite communication method supporting multi-mode launch and BeiDou timing provided in this application embodiment can be executed by an electronic device or a functional module or entity in an electronic device that can realize the geostationary meteorological satellite communication method supporting multi-mode launch and BeiDou timing. The electronic devices mentioned in this application embodiment include, but are not limited to, mobile phones, tablets, computers, cameras and wearable devices. The following uses an electronic device as the execution subject to illustrate the geostationary meteorological satellite communication method supporting multi-mode launch and BeiDou timing provided in this application embodiment.

[0053] Figure 1 This is a schematic diagram of the structure of a geostationary meteorological satellite communication module supporting multi-mode transmission and BeiDou timing, as provided in the embodiments of this application. Figure 1 As shown, the geostationary meteorological satellite communication module supporting multi-mode launch and BeiDou timing includes a BeiDou positioning and timing unit, a satellite communication unit, a modulator, a digital-to-analog converter, and an interface unit.

[0054] The BeiDou positioning and timing unit is used to receive data from the GNSS antenna and generate a PPS signal.

[0055] The satellite communication unit is used to receive input data and PPS signals and generate communication signals;

[0056] The digital-to-analog converter is used to receive communication signals and convert them into analog signals;

[0057] The modulator is used to modulate the analog signal to obtain the modulated signal and transmit it;

[0058] The interface unit is used to provide a power interface, a UART interface, and an I / O interface.

[0059] Optionally, the geostationary meteorological satellite communication module adopts a dual-channel data management mechanism, supporting the configuration of two independent channel parameters, which are used for the concurrent or alternating transmission of service data and status data, respectively.

[0060] In some embodiments, the BeiDou positioning and timing unit receives satellite navigation signals from a GNSS antenna, parses out time and position information, and generates a high-precision PPS (pulses per second) signal for synchronizing the timing of the entire module. The BeiDou positioning and timing unit includes a BeiDou positioning subunit and a timing subunit: the positioning subunit is responsible for decoding GNSS data and outputting latitude, longitude, elevation, and other information; the timing subunit generates a stable and accurate PPS signal based on the BeiDou system time, with an accuracy reaching the nanosecond level.

[0061] A digital-to-analog converter (DAC) converts the baseband-modulated digital communication signal into an analog signal for radio frequency (RF) modulation. The modulator receives the analog signal and performs RF modulation according to the configured modulation scheme (QPSK or single-carrier), ultimately transmitting it to a Fengyun geostationary meteorological satellite via an antenna.

[0062] The interface unit provides a variety of external interfaces, including a power interface (supporting wide voltage input), a UART interface (for parameter configuration and data input), and several I / O interfaces (for triggering transmission, status indication, etc.). The module supports two transmission modes: timed transmission mode, in which the module automatically transmits data at preset time intervals; in random transmission mode, the module can immediately transmit data based on external events (such as GPIO triggers).

[0063] In some embodiments, the geostationary meteorological satellite communication module is centered on a main control chip, integrating a BeiDou GNSS receiver and an L-band satellite communication RF front-end. Upon power-up, it automatically completes BeiDou positioning and time calibration, and achieves local clock discipline through PPS signal phase-locked loop. Communication parameters (rate, modulation scheme, channel, transmission mode) are configured via the UART interface. When trigger conditions are met (timed arrival or GPIO event), the module transmits buffered data to the Fengyun geostationary meteorological satellite after QPSK or single-carrier modulation according to preset channel parameters. Simultaneously, the module periodically reports its operating status (e.g., voltage, temperature, positioning information). The firmware can receive upgrade packages via the satellite downlink, and performs FOTA updates after completing security verification.

[0064] In some embodiments, the satellite communication unit includes a main control microcontroller subunit and a baseband processing subunit;

[0065] The main control microcontroller subunit is used to dynamically set the communication rate, modulation method and transmission power according to the received PPS signal;

[0066] The baseband processing subunit, under the control of the main control microcontroller subunit, performs QPSK baseband modulation processing on the input data to generate a communication signal.

[0067] The satellite communication unit comprises a main control microcontroller subunit and a baseband processing subunit. The main control microcontroller subunit dynamically adjusts communication parameters, including communication rate, modulation scheme, and transmit power, based on the PPS signal. Under the control of the main control unit, the baseband processing subunit performs baseband modulation processing on the input data. Specifically, the input data is first upsampled by a factor of 10, then filtered through a root-raised cosine filter to complete QPSK baseband modulation and generate the communication signal.

[0068] In some embodiments, the BeiDou positioning and timing unit outputs a PPS signal to discipline the clock and ensure its long-term frequency accuracy. The satellite communication unit performs digital-to-analog conversion on the acquired data, performs low-pass filtering on the analog data to eliminate noise signals, and uses an IQ mixer high-performance chip solution to modulate the useful signal into a higher frequency output signal, which is then amplified and transmitted.

[0069] Optionally, it supports two working modes: timed emission (according to a preset period) and random emission (triggered by external events or internal states).

[0070] In some embodiments, the satellite communication unit operates in a frequency band of 400 MHz, can be configured with multiple communication rates, and has a transmission power ranging from 2 to 10 W.

[0071] For example, the satellite communication unit operates in the 400 MHz band, supports 400 channels, can be configured with different communication rates, supports both single-carrier and QPSK modulation methods, and the transmit power is adjustable within 2–10 W.

[0072] In some embodiments, the step of performing QPSK baseband modulation processing on the input data to generate a communication signal includes:

[0073] The input data is upsampled by a factor of 10 to obtain the upsampled data.

[0074] The upsampled data is input into a preset rooted cosine digital filter for filtering, and QPSK baseband modulation is completed to generate a communication signal.

[0075] For example, the geostationary meteorological satellite communication module adopts an overall architecture design of embedded MCU data encoding and modulation, IQ branch data DA conversion, hardware low-pass filtering and IQ branch up-conversion, specifically including the following aspects:

[0076] (1) Data preprocessing: The observed data is processed by BCH encoding, frame grouping and splitting, synchronization scrambling, RS encoding, 3 / 4 convolution encoding and IQ branch data splicing within the embedded processor MCU.

[0077] (2) Baseband Data QPSK Modulation: First, the data is upsampled by 10 times. Inside the embedded MCU, a preset root-cosine digital filter is used to upsample and filter the data, completing the baseband data QPSK modulation. The filtered data, based on the upsampling factor and the required data output rate, is driven by a timer to convert the I and Q branch data from digital to analog signals. A hardware low-pass filter filters the converted analog signal, suppressing out-of-band signals. The low-pass filtered data is then upconverted.

[0078] Optionally, the geostationary meteorological satellite communication module also includes an upgrade loading interface. Through the communication interface, the module firmware can be upgraded and updated online. It adopts an internal bootloader in the main control unit and a dual APP partition scheme with main and backup. In case of upgrade failure, it automatically switches to the backup APP partition to ensure the stable operation of the geostationary meteorological satellite communication module.

[0079] In this embodiment, an MCU is used to implement the data processing, conversion, and control design of the above-mentioned stages, which reduces the difficulty of software design. The modular design of each unit of the embedded software is independent of each other, which greatly facilitates software interface debugging and integration testing. The MCU FPU computing unit accelerates data processing and meets the requirements of real-time data processing.

[0080] In some embodiments, the modulation scheme of the modulator includes single-carrier modulation and QPSK modulation.

[0081] In some embodiments, the geostationary meteorological satellite communication module includes a timed transmission mode and a random transmission mode.

[0082] In some embodiments, the BeiDou positioning and timing unit includes a BeiDou positioning subunit and a timing subunit;

[0083] The Beidou positioning subunit is used to receive and process GNSS antenna data and generate positioning data, which includes time information and location information.

[0084] The timing subunit is used to generate a PPS signal based on the positioning data.

[0085] For example, the BeiDou positioning and timing unit outputs a positioning accuracy of less than or equal to 1 m CEP and provides a PPS signal with an accuracy of no more than 25 ns, a timing accuracy of no more than 25 ns, and supports the standard NMEA 0183 V4.00 / 4.10 protocol.

[0086] In some embodiments, the standby current of the geostationary meteorological satellite communication module is less than or equal to a first threshold, and the transmission current of the geostationary meteorological satellite communication module is less than or equal to a second threshold.

[0087] For example, it uses a 12V DC power supply, with a standby current of no more than 15 mA and a transmit current of no more than 3 A, and provides a UART interface (MCU_TX / MCU_RX), GPIO reserved pins and a reset control signal.

[0088] This application also provides a geostationary meteorological satellite communication method that supports multi-mode launch and BeiDou timing, such as... Figure 2 As shown, the process of this geostationary meteorological satellite communication method that supports multi-mode launch and BeiDou timing includes steps 210, 220, 230 and 240.

[0089] Step 210: Obtain the data from the GNSS antenna and the input data from the interface unit, send the data from the GNSS antenna to the BeiDou positioning and timing unit, and generate a PPS signal;

[0090] Step 220: Send the PPS signal and the input data of the interface unit to the satellite communication unit for modulation to generate a communication signal;

[0091] Step 230: Send the communication signal to the digital-to-analog converter for conversion to obtain an analog signal;

[0092] Step 240: Send the analog signal to the modulator for modulation, obtain the modulated signal, and transmit it through the antenna.

[0093] In some embodiments, sending data from the GNSS antenna to the BeiDou positioning and timing unit to generate a PPS signal includes:

[0094] GNSS antenna data is sent to the BeiDou positioning subunit for positioning to obtain positioning data;

[0095] The positioning data is sent to the timing subunit for timing synchronization, generating a PPS signal.

[0096] For example, the geostationary meteorological satellite communication module adopts an embedded power consumption control strategy. When a large amount of data calculation and processing is required for data encoding and modulation, the MCU can be configured to enter full-speed operation mode to meet the real-time requirements of data processing. In the standby stage, the MCU can be configured to enter low-power mode, thereby reducing the overall power consumption of the main control system.

[0097] In some embodiments, the geostationary meteorological satellite communication module supports FOTA (Firmware Over-The-Air) firmware upgrades via a local serial port or satellite link. The baseband RF output is connected to the power amplifier via the MMCX interface, and the GNSS RF input is connected to the antenna via the IPEX interface. The operating temperature range is -40°C to +85°C, making it suitable for deployment in unmanned weather stations in the field.

[0098] The geostationary meteorological satellite communication module supporting multi-mode transmission and BeiDou timing provided in this application highly integrates functional units such as BeiDou timing, satellite communication, signal modulation and conversion, and general interfaces into a single module, and defines clear signal flow and interface standards. This achieves decoupling and modularization of hardware and functions, reduces equipment size, and allows the geostationary meteorological satellite communication module to be easily embedded as a standard communication component into various meteorological acquisition devices. This greatly simplifies the design and integration complexity of field observation systems and improves deployment flexibility and reliability.

[0099] In some embodiments, such as Figure 3 As shown, this application embodiment also provides an electronic device 300, including a processor 301, a memory 302, and a computer program stored in the memory 302 and executable on the processor 301. When the program is executed by the processor 301, it implements the various processes of the above-described embodiments of the geostationary meteorological satellite communication method supporting multi-mode transmission and BeiDou timing, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0100] It should be noted that the electronic devices in the embodiments of this application include the mobile electronic devices and non-mobile electronic devices described above.

[0101] This application also provides a non-transitory computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the various processes of the above-described embodiments of the geostationary meteorological satellite communication method supporting multi-mode transmission and BeiDou timing, and achieves the same technical effect. To avoid repetition, it will not be described again here.

[0102] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0103] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described geostationary meteorological satellite communication method supporting multi-mode transmission and BeiDou timing.

[0104] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0105] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface and the processor are coupled. The processor is used to run programs or instructions to implement the various processes of the above-described embodiments of the geostationary meteorological satellite communication method supporting multi-mode transmission and BeiDou timing, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0106] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a device-level chip, device chip, chip device, or on-chip device chip, etc.

[0107] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0108] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the geostationary meteorological satellite communication method supporting multi-mode transmission and BeiDou timing of the various embodiments of this application.

[0109] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0110] In the description of this application, "multiple" means two or more.

[0111] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

[0112] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0113] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A geostationary meteorological satellite communication module supporting multi-mode launch and BeiDou timing, characterized in that, The module includes a BeiDou positioning and timing unit, a satellite communication unit, a modulator, a digital-to-analog converter, and an interface unit. The module adopts a dual-channel data management mechanism, including a first independent channel and a second independent channel. The first independent channel is used for the simultaneous transmission of service data and status data, and the second independent channel is used for the alternating transmission of service data and status data. The BeiDou positioning and timing unit is used to receive data from the GNSS antenna and generate PPS signals. The BeiDou positioning and timing unit includes a BeiDou positioning subunit and a timing subunit. The Beidou positioning subunit is used to receive and process GNSS antenna data and generate positioning data, which includes time information and location information. The timing subunit is used to generate a PPS signal based on the positioning data, and the timing accuracy of the output PPS signal of the Beidou positioning and timing unit is not higher than 25 ns. The satellite communication unit is used to receive input data and PPS signals and generate communication signals; the satellite communication unit includes a main control microcontroller subunit and a baseband processing subunit. The main control microcontroller subunit is used to dynamically set the communication rate, modulation method and transmission power according to the received PPS signal; The baseband processing subunit, under the control of the main control microcontroller subunit, performs QPSK baseband modulation processing on the input data to generate a communication signal; The satellite communication unit operates in the 400 MHz frequency band, is configured with multiple communication rates, and has a transmission power range of 2–10W. The step of performing QPSK baseband modulation processing on the input data to generate a communication signal includes: The input data is preprocessed to obtain preprocessed input data. The preprocessing includes BCH coding, frame grouping and segmentation, synchronization scrambling, RS coding and 3 / 4 convolutional coding. The preprocessed input data is upsampled by a factor of 10 to obtain the upsampled data. The upsampled data is input into a preset root-raised cosine digital filter for filtering to obtain filtered data, which completes QPSK baseband modulation processing and generates a communication signal. The digital-to-analog converter is used to receive communication signals and convert them into analog signals; The modulator is used to modulate the analog signal. It filters the converted analog signal through a hardware low-pass filter to obtain filtered data, and then up-converts the filtered data to obtain a modulated signal for transmission. The modulation methods of the modulator include single-carrier modulation and QPSK modulation; The interface unit is used to provide a power interface, a UART interface, and an I / O interface; The interface unit includes an upgrade loading interface, which is used to realize online upgrade and update of the module firmware. It adopts the main control internal boot loader and the main and backup dual APP partition scheme. After the upgrade is abnormal, it automatically switches to the backup APP partition to ensure the stable operation of the geostationary meteorological satellite communication module. The geostationary meteorological satellite communication module includes a timed transmission mode and a random transmission mode. In the timed transmission mode, the module automatically transmits data at preset time intervals; in the random transmission mode, the module immediately transmits data based on external events. The geostationary meteorological satellite communication module adopts an embedded power consumption control strategy. When performing QPSK baseband modulation processing, the main control microcontroller subunit is configured to enter the running mode. During the standby phase, the main control microcontroller subunit is configured to enter the working mode with power consumption less than a preset threshold.

2. The geostationary meteorological satellite communication module supporting multi-mode launch and BeiDou timing as described in claim 1, characterized in that, The standby current of the geostationary meteorological satellite communication module is less than or equal to a first threshold, and the transmission current of the geostationary meteorological satellite communication module is less than or equal to a second threshold.

3. A geostationary meteorological satellite communication method supporting multi-mode launch and BeiDou timing, implemented using a geostationary meteorological satellite communication module supporting multi-mode launch and BeiDou timing as described in any one of claims 1 to 2, characterized in that, The method includes: The system acquires data from the GNSS antenna and input data from the interface unit, sends the GNSS antenna data to the BeiDou positioning and timing unit, and generates a PPS signal. The BeiDou positioning and timing unit includes a BeiDou positioning subunit and a timing subunit. The Beidou positioning subunit is used to receive and process GNSS antenna data and generate positioning data, which includes time information and location information. The timing subunit is used to generate a PPS signal based on the positioning data, and the timing accuracy of the output PPS signal of the Beidou positioning and timing unit is not higher than 25 ns. The PPS signal and the input data from the interface unit are sent to the satellite communication unit for modulation to generate a communication signal; the satellite communication unit includes a main control microcontroller subunit and a baseband processing subunit. The main control microcontroller subunit is used to dynamically set the communication rate, modulation method and transmission power according to the received PPS signal; The baseband processing subunit, under the control of the main control microcontroller subunit, performs QPSK baseband modulation processing on the input data to generate a communication signal; The satellite communication unit operates in the 400 MHz frequency band, is configured with multiple communication rates, and has a transmission power range of 2–10W. The step of performing QPSK baseband modulation processing on the input data to generate a communication signal includes: The input data is preprocessed to obtain preprocessed input data. The preprocessing includes BCH coding, frame grouping and segmentation, synchronization scrambling, RS coding and 3 / 4 convolutional coding. The preprocessed input data is upsampled by a factor of 10 to obtain the upsampled data. The upsampled data is input into a preset root-raised cosine digital filter for filtering to obtain filtered data, which completes QPSK baseband modulation processing and generates a communication signal. The communication signal is sent to the digital-to-analog converter for conversion to obtain an analog signal; The analog signal is sent to the modulator for modulation. The converted analog signal is filtered and up-converted by a hardware low-pass filter to obtain the modulated signal, which is then transmitted through an antenna. The modulation methods of the modulator include single-carrier modulation and QPSK modulation. The interface unit includes an upgrade loading interface, which is used to realize online upgrade and update of the module firmware. It adopts the main control internal boot loader and the main and backup dual APP partition scheme. After the upgrade is abnormal, it automatically switches to the backup APP partition to ensure the stable operation of the geostationary meteorological satellite communication module. The geostationary meteorological satellite communication module includes a timed transmission mode and a random transmission mode. In the timed transmission mode, the module automatically transmits data at preset time intervals; in the random transmission mode, the module immediately transmits data based on external events. The geostationary meteorological satellite communication module adopts an embedded power consumption control strategy. When performing QPSK baseband modulation processing, the main control microcontroller subunit is configured to enter the running mode. During the standby phase, the main control microcontroller subunit is configured to enter the working mode with power consumption less than a preset threshold.

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