CN117833977A - Beidou communication system for transmitting voice and pictures based on soft compression coding - Google Patents
Beidou communication system for transmitting voice and pictures based on soft compression coding Download PDFInfo
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- CN117833977A CN117833977A CN202311543120.1A CN202311543120A CN117833977A CN 117833977 A CN117833977 A CN 117833977A CN 202311543120 A CN202311543120 A CN 202311543120A CN 117833977 A CN117833977 A CN 117833977A
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- 230000006835 compression Effects 0.000 title claims abstract description 28
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- 238000006243 chemical reaction Methods 0.000 claims description 6
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- 238000004806 packaging method and process Methods 0.000 claims description 3
- 238000004026 adhesive bonding Methods 0.000 claims 1
- 230000006837 decompression Effects 0.000 abstract description 2
- 238000013461 design Methods 0.000 abstract description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 10
- 229910052744 lithium Inorganic materials 0.000 description 10
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- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 3
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18513—Transmission in a satellite or space-based system
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
- H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
- H04N19/172—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a picture, frame or field
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/20—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using video object coding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Aviation & Aerospace Engineering (AREA)
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- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
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Abstract
一种基于软压缩编码的用于传输语音、图片的北斗通信系统，其特征在于包括北斗便携式多卡终端、北斗卫星、智能手机、北斗多卡终端和北斗控制平台。本发明完成了一套基于北斗通信系统实现语音、图片、报文传输的通信系统。该系统可实现用户之间、用户与平台之间的相互通信。本发明相比传统的硬件语音方案、设计简单、可靠，省去可大量的硬件组件。通过智能手机端安装的APP及开发的语音、图片高压缩比的软压缩算发处理，实现用户之间语音通信及图片传输。同时控制平台采用相同的语音、图片压缩、解压算法实现用户与平台之间的语音通信及图片传输。
A Beidou communication system for transmitting voice and pictures based on soft compression coding is characterized by comprising a Beidou portable multi-card terminal, a Beidou satellite, a smart phone, a Beidou multi-card terminal and a Beidou control platform. The present invention completes a communication system based on the Beidou communication system for transmitting voice, pictures and messages. The system can realize mutual communication between users and between users and platforms. Compared with traditional hardware voice solutions, the present invention is simple in design and reliable, and can save a large number of hardware components. Through the APP installed on the smart phone and the developed soft compression algorithm with high compression ratio of voice and pictures, voice communication and picture transmission between users are realized. At the same time, the control platform adopts the same voice, picture compression and decompression algorithm to realize voice communication and picture transmission between users and the platform.
Description
Technical Field
The invention relates to the field of Beidou navigation, in particular to a Beidou communication system for transmitting voice and pictures based on soft compression coding.
Background
With the continuous maturity and perfection of the Beidou navigation satellite system in China, the Beidou application terminal products are also continuously abundant, and are gradually applied to various industries. The Beidou technology is continuously combined with other various technologies, so that the induction technology is widely applied. Particularly, beidou equipment is used as a peripheral of intelligent equipment such as a mobile phone and the like, data connection is performed in a wireless mode, and the application mode is more and more popular.
However, the Beidou equipment on the market at present only can support the transmission of text data, and cannot transmit long messages, voice, pictures and the like.
Disclosure of Invention
Aiming at the problems in the background technology, the invention provides a Beidou communication system for transmitting voice and pictures based on soft compression coding. Real-time and high-bandwidth transmission of data such as messages, voice, pictures and the like can be realized.
The technical scheme is as follows:
a Beidou communication system for transmitting voice and pictures based on soft compression coding is characterized by comprising
The Beidou portable multi-card terminal is used for establishing communication with the Beidou satellite and transmitting digitized voice and picture data through the Beidou satellite;
the Beidou satellite is used for receiving the digitized voice and picture data sent by the Beidou portable multi-card terminal and transmitting the digitized voice and picture data to the other north bucket portable multi-card terminal;
smart phone: the voice input device is used for inputting voice, carrying out soft compression and encoding, and sending the sub-packets to the Beidou portable multi-card terminal, carrying out soft compression and encoding on picture information, and sending the picture information to the Beidou portable multi-card terminal; the method comprises the steps of receiving voice information sent by a Beidou portable multi-card terminal, and packaging and playing the voice information; the method comprises the steps of receiving, decompressing, restoring and displaying picture information sent by a Beidou portable multi-card terminal;
the Beidou multi-card terminal; the system is used for establishing communication with the Beidou satellite and transmitting the digitized voice and picture data to the Beidou control platform through a serial port; the mobile terminal is used for sending control instructions, voice data, picture data and the like sent by the Beidou control platform to the portable user terminal through the Beidou satellite.
The Beidou multi-card terminal comprises a master control MCU unit, an RDSS functional unit, an RNSS functional unit and a Beidou RDSS+RNSS transceiver antenna, wherein the Beidou RDSS+RNSS transceiver antenna is connected with the master control MCU unit through the RDSS functional unit on one hand and connected with the master control MCU unit through the RNSS functional unit on the other hand, and the Beidou multi-card terminal is characterized by further comprising a Bluetooth functional unit, a USB data link and an interface, and the Bluetooth functional unit is connected with a Bluetooth antenna; the main control MCU unit is also connected with a Beidou SIM card array, the SIM card array is divided into 1 main card and a plurality of auxiliary cards, and the channel selection of the SIM cards is automatically switched under the control of the main control MCU unit; the main card is responsible for information receiving of the system, the auxiliary card is used for transmitting system information, and the working mode of interval transmission of a plurality of auxiliary cards can be adopted to remarkably improve the transmitting frequency of the system; the RDSS functional unit comprises an RDSS baseband chip, an RDSS low-noise amplifier LNA unit, an RDSS radio frequency chip and a power amplifier PA unit, wherein signals received by an antenna of the RDSS functional unit are amplified by the RDSS low-noise amplifier LNA unit in a low-noise mode and then are sent to a radio frequency transceiver chip to realize down-conversion, and the radio frequency signals are converted into digital intermediate frequency signals to be used as digital intermediate frequency input of the RDSS baseband chip; the RDSS baseband chip integrates 10 independent digital receiver channels and 1 transmitting channel to finish the receiving of the Beidou RDSS baseband signals and the generation of the transmitting baseband signals; the transmitting baseband signal generated by the RDSS baseband chip is input to the RDSS radio frequency chip, the up-conversion function is completed in the radio frequency chip, and the transmitting baseband signal is amplified by the power amplifier PA unit and then transmitted by the antenna. The module adopts a burst mode to send information, and the length and the frequency of the sent information are related to the grade of the IC card.
The RNSS functional unit comprises an RNSS low-noise amplifier LNA unit, an RNSS B1/L1 receiving channel and a signal processing module, wherein the RNSS low-noise amplifier LNA unit of the RNSS functional unit adopts a scheme of 2 and an amplifier +2-level LNA, the gain reaches more than 35dB, and a limiting diode is added at the front end for protecting the low-noise amplifier front end from being damaged by the transmitting power of the RDSS PA; the RNSS B1/L1 receiving channel and the signal processing module adopt a receiving chip, integrate the radio frequency receiving channel and the baseband signal processing into a whole, and support the function of GPS L1/BDS B1 dual-mode satellite positioning.
The Bluetooth functional unit adopts a CC2541 chip development scheme based on TI company, and the chip supports a Bluetooth 4.0BLE mode, and the power consumption is low in the mode; the Bluetooth antenna adopts an onboard inverted F antenna.
The Beidou RDSS+RNSS transceiver antenna comprises: the device comprises a Beidou RDSS antenna, an RNSS antenna and a GNSS B1/L1 frequency point antenna; the L transmitting frequency point of the RDSS antenna adopts 36-25 mm 2mm ceramic plates, the receiving frequency point adopts 25-36 mm ceramic plates, the two ceramic plates are stacked up and down, and the two ceramic plates are combined together in a patch welding mode; the RDSS antenna back feed point is covered with a shielding cover and is led out by adopting a mode of a radio frequency wire with the diameter of 1.13mm and an IPEX radio frequency connector; the GNSS antenna comprises a GPS_L1 frequency point and a BDS_B1 frequency point, and the antenna radiator adopts 15 x 4mm ceramic blocks; the RDSS antenna and the GNSS B1/L1 frequency point antenna are fixed on a PCB reflecting plate with the thickness of 65 mm 36mm, and a feed point of the RNSS antenna is covered with a shielding cover for shielding and is led out in a mode of a radio frequency wire with the diameter of 1.13mm and an IPEX radio frequency connector. The two ceramic plates are stacked up and down and are combined together in a patch welding mode; and compared with the traditional adhesive, the adhesive has stronger reliability. The RDSS in the layout of the antenna is far away from the GNSS radiator, the field interference is small, the antenna performance is excellent and stable, and the reliability is good.
The system also comprises a key, wherein the key is used for one-key SOS; the intelligent power supply system further comprises power supply management, wherein the power supply management is connected with a lithium battery, and the power supply management is respectively connected with and supplies power to the RDSS functional unit, the RNSS functional unit, the Bluetooth functional unit and the main control MCU unit.
The lithium battery charging system further comprises battery charging management and a magnetic type charging interface, wherein the magnetic type charging interface is connected with the lithium battery through battery charging management.
The main control MCU unit is also connected with an indicator lamp.
The beneficial effects of the invention are as follows:
the invention completes a set of communication system for realizing voice, picture and message transmission based on the Beidou communication system. The system can realize intercommunication between users and platforms. Compared with the traditional hardware voice scheme, the invention has simple and reliable design and omits a large number of hardware components. The voice communication and the picture transmission among users are realized through APP installed on the smart phone end and soft compression calculation processing of developed voice and picture with high compression ratio. Meanwhile, the control platform adopts the same voice and picture compression and decompression algorithm to realize voice communication and picture transmission between the user and the platform.
The invention develops a Beidou portable multi-card terminal based on a Beidou communication system, and can be connected with intelligent terminals such as mobile phones, pads and the like through Bluetooth or USB data links and interfaces, so that the transmission of Beidou short messages, long messages, pictures and voice information and the position reporting function can be realized; the Bluetooth and USB data links and interfaces ensure the wireless and wired connection of intelligent terminals such as user mobile phones, and can be selected according to specific environments or can be connected with different devices. Meanwhile, the equipment is provided with a one-key SOS, and the function of realizing emergency call is triggered. And setting a power supply management and battery charging management structure, providing power supply input for each functional unit and realizing safe charging and recycling of the lithium battery.
Drawings
FIG. 1 is a diagram of the system of the present invention.
Fig. 2 is a block diagram of a beidou portable multi-card terminal module of the present invention.
Fig. 3 is a schematic structural diagram of a SIM card of the beidou portable multi-card terminal of the present invention.
Fig. 4 is a schematic structural diagram of the RDSS functional unit of the beidou portable multi-card terminal of the present invention.
Fig. 5 is a schematic structural diagram of the RNSS functional unit of the beidou portable multi-card terminal of the present invention.
Fig. 6 is a schematic structural diagram of the bluetooth function unit of the beidou portable multi-card terminal.
Detailed Description
The invention is further illustrated below with reference to examples, but the scope of the invention is not limited thereto:
as shown in fig. 1 to 6, the beidou communication system based on soft compression coding for transmitting voice and pictures is characterized by comprising a beidou portable multi-card terminal, a communication device and a communication device, wherein the beidou portable multi-card terminal is used for establishing communication with a beidou satellite and transmitting digitized voice and picture data through the beidou satellite;
the Beidou satellite is used for receiving the digitized voice and picture data sent by the Beidou portable multi-card terminal and transmitting the digitized voice and picture data to the other north bucket portable multi-card terminal;
smart phone: the voice input device is used for inputting voice, carrying out soft compression and encoding, and sending the sub-packets to the Beidou portable multi-card terminal, carrying out soft compression and encoding on picture information, and sending the picture information to the Beidou portable multi-card terminal; the method comprises the steps of receiving voice information sent by a Beidou portable multi-card terminal, and packaging and playing the voice information; the method comprises the steps of receiving, decompressing, restoring and displaying picture information sent by a Beidou portable multi-card terminal; as shown in fig. 1, the invention realizes the Beidou transmission of voice and pictures between the smart phone a and the smart phone B. The time-consuming terminal has the advantages of large data transmission quantity and no distortion.
The Beidou multi-card terminal; the system is used for establishing communication with the Beidou satellite and transmitting the digitized voice and picture data to the Beidou control platform through a serial port; the mobile terminal is used for sending control instructions, voice data, picture data and the like sent by the Beidou control platform to the portable user terminal through the Beidou satellite.
The Beidou portable multi-card terminal comprises a main control MCU unit, an RDSS functional unit, an RNSS functional unit and a Beidou RDSS+RNSS transceiver antenna, wherein the Beidou RDSS+RNSS transceiver antenna is connected with the main control MCU unit through the RDSS functional unit on one hand, and is connected with the main control MCU unit through the RNSS functional unit on the other hand, and is characterized by further comprising a Bluetooth functional unit, a USB data link and an interface, and the Bluetooth functional unit is connected with a Bluetooth antenna; the main control MCU unit is also connected with a Beidou SIM card array, the SIM card array is divided into 1 main card and a plurality of auxiliary cards, and the channel selection of the SIM cards is automatically switched under the control of the main control MCU unit; the main card is responsible for information receiving of the system, the auxiliary card is used for transmitting system information, and the working mode of interval transmission of a plurality of auxiliary cards can be adopted to remarkably improve the transmitting frequency of the system; the RDSS functional unit comprises an RDSS baseband chip, an RDSS low-noise amplifier LNA unit, an RDSS radio frequency chip and a power amplifier PA unit, wherein signals received by an antenna of the RDSS functional unit are amplified by the RDSS low-noise amplifier LNA unit in a low-noise mode and then are sent to a radio frequency transceiver chip to realize down-conversion, and the radio frequency signals are converted into digital intermediate frequency signals to be used as digital intermediate frequency input of the RDSS baseband chip; the RDSS baseband chip integrates 10 independent digital receiver channels and 1 transmitting channel to finish the receiving of the Beidou RDSS baseband signals and the generation of the transmitting baseband signals; the transmitting baseband signal generated by the RDSS baseband chip is input to the RDSS radio frequency chip, the up-conversion function is completed in the radio frequency chip, and the transmitting baseband signal is amplified by the power amplifier PA unit and then transmitted by the antenna. The module adopts a burst mode to send information, and the length and the frequency of the sent information are related to the grade of the IC card.
The RNSS functional unit comprises an RNSS low-noise amplifier LNA unit, an RNSS B1/L1 receiving channel and a signal processing module, wherein the RNSS low-noise amplifier LNA unit of the RNSS functional unit adopts a scheme of 2 and an amplifier +2-level LNA, the gain reaches more than 35dB, and a limiting diode is added at the front end for protecting the low-noise amplifier front end from being damaged by the transmitting power of the RDSS PA; the RNSS B1/L1 receiving channel and the signal processing module adopt a receiving chip, integrate the radio frequency receiving channel and the baseband signal processing into a whole, and support the function of GPS L1/BDS B1 dual-mode satellite positioning.
The Bluetooth functional unit adopts a CC2541 chip development scheme based on TI company, and the chip supports a Bluetooth 4.0BLE mode, and the power consumption is low in the mode; the Bluetooth antenna adopts an onboard inverted F antenna.
The Beidou RDSS+RNSS transceiver antenna comprises: the device comprises a Beidou RDSS antenna, an RNSS antenna and a GNSS B1/L1 frequency point antenna; the L transmitting frequency point of the RDSS antenna adopts 36-25 mm 2mm ceramic plates, the receiving frequency point adopts 25-36 mm ceramic plates, the two ceramic plates are stacked up and down, and the two ceramic plates are combined together in a patch welding mode; the RDSS antenna back feed point is covered with a shielding cover and is led out by adopting a mode of a radio frequency wire with the diameter of 1.13mm and an IPEX radio frequency connector; the GNSS antenna comprises a GPS_L1 frequency point and a BDS_B1 frequency point, and the antenna radiator adopts 15 x 4mm ceramic blocks; the RDSS antenna and the GNSS B1/L1 frequency point antenna are fixed on a PCB reflecting plate with the thickness of 65 mm 36mm, and a feed point of the RNSS antenna is covered with a shielding cover for shielding and is led out in a mode of a radio frequency wire with the diameter of 1.13mm and an IPEX radio frequency connector.
The two ceramic plates are stacked up and down and are combined together in a patch welding mode; and compared with the traditional adhesive, the adhesive has stronger reliability. The RDSS in the layout of the antenna is far away from the GNSS radiator, the field interference is small, the antenna performance is excellent and stable, and the reliability is good.
The system also comprises a key, wherein the key is used for one-key SOS; the intelligent power supply system further comprises power supply management, wherein the power supply management is connected with a lithium battery, and the power supply management is respectively connected with and supplies power to the RDSS functional unit, the RNSS functional unit, the Bluetooth functional unit and the main control MCU unit.
The lithium battery charging system further comprises battery charging management and a magnetic type charging interface, wherein the magnetic type charging interface is connected with the lithium battery through battery charging management.
The main control MCU unit is also connected with an indicator lamp.
Example 1: a beidou portable multi-card terminal system comprising:
-a master control MCU unit for functions such as control of the whole system unit, multi-card array card switching, mode switching management, underlying protocol integration, etc.;
the RDSS functional unit is used for filtering, amplifying, frequency-converting and signal-processing the satellite signals received by the RDSS antenna to calculate the signal content and outputting the signal content to the main control MCU unit through the serial port; simultaneously, modulating and amplifying the content sent by the user and then sending the content to an antenna end;
the RNSS functional unit is used for filtering, amplifying, frequency-converting and processing satellite signals received by the RNSS antenna to calculate useful information such as position, time, signal-to-noise ratio, satellite number and the like, and outputting the useful information to the main control MCU unit through a serial port;
-a beidou rdss+rnss transceiver antenna for receiving and transmitting satellite signals;
the big dipper RDSS+RNSS receiving and dispatching antenna connects main control MCU unit through RDSS functional unit on the one hand, and big dipper RDSS+RNSS receiving and dispatching antenna connects main control MCU unit through RNSS functional unit on the other hand, and it still includes:
-a bluetooth functional unit and a bluetooth antenna for wireless connection with an intelligent terminal such as a user's mobile phone;
-a USB data link and interface for wired connection with a smart terminal such as a user's mobile phone.
Example 2: the Beidou communication system for transmitting voice and pictures based on soft compression coding in embodiment 1 further comprises:
keys for implementing functions of terminal on/off, one-key SOS and reset.
Example 3: the Beidou communication system for transmitting voice and pictures based on soft compression coding in embodiment 1 further comprises:
-a power management connected with the lithium battery, said power management connecting and powering the RDSS functional unit, the RNSS functional unit, the bluetooth functional unit and the master MCU unit, respectively.
Example 4: the big Dipper communication system for transmitting voice and pictures based on soft compression coding of embodiment 3 further comprises:
-a battery charging management and a magnetically attracted charging interface, the magnetically attracted charging interface being connected to the lithium battery through the battery charging management, the battery charging management being for safe charging of the lithium battery.
Example 5: the Beidou communication system for transmitting voice and pictures based on soft compression coding in embodiment 1 further comprises:
-the Beidou SIM card array completes intelligent switching of multiple SIMs under the control of the main control MCU unit, and realizes high-frequency information transmission of the Beidou RDSS.
Example 6: the Beidou communication system for transmitting voice and pictures based on soft compression coding in embodiment 1 further comprises:
indicator lights, preferably 4 indicator lights, are provided for the terminal, indicating the power supply, the bluetooth function unit, the RDSS message and the positioning indication function, respectively.
Those of ordinary skill in the art will appreciate that all or a portion of the steps in the various methods of the above embodiments may be performed by hardware associated with instructions via circuit configurations that may be performed by a single chip or other similarly functioning integrated chip, as is known in the art. The core invention is that the overall structure layout of the system and the local control method can be completed by programming in the prior art; the local module connection can be realized by means of the prior art.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (4)
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| CN202311543120.1A CN117833977A (en) | 2017-12-28 | 2017-12-28 | Beidou communication system for transmitting voice and pictures based on soft compression coding |
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| CN109257737B (en) * | 2018-11-07 | 2019-11-26 | 北京天海达科技有限公司 | A kind of Beidou long message sending device and method |
| CN109901196B (en) * | 2019-03-22 | 2023-04-21 | 中国石油大学(华东) | Method for transmitting multi-frequency GNSS data and RTS data by using Beidou short message |
| CN110996274A (en) * | 2019-12-04 | 2020-04-10 | 北京天海达科技有限公司 | System and method for sending picture based on Beidou short message |
| CN112615664A (en) * | 2020-12-10 | 2021-04-06 | 北京天海达科技有限公司 | Beidou short message multi-card user machine and implementation method |
| CN112566202B (en) * | 2020-12-10 | 2023-06-27 | Oppo广东移动通信有限公司 | Communication switching method, device and storage medium |
| CN113691305B (en) * | 2021-10-26 | 2022-02-11 | 武汉兴图新科电子股份有限公司 | Image transmission method of Beidou-3 short message channel based on cloud-side-end |
| CN115843002B (en) * | 2022-10-31 | 2024-09-03 | 国网北京市电力公司 | Method and device for picture transmission based on Beidou short message terminal |
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| CN108183743B (en) | 2023-12-08 |
| CN108183743A (en) | 2018-06-19 |
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