CN111835399A - Satellite-borne signal receiving and transmitting device and method based on Lora technology - Google Patents
Satellite-borne signal receiving and transmitting device and method based on Lora technology Download PDFInfo
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- CN111835399A CN111835399A CN202010494734.5A CN202010494734A CN111835399A CN 111835399 A CN111835399 A CN 111835399A CN 202010494734 A CN202010494734 A CN 202010494734A CN 111835399 A CN111835399 A CN 111835399A
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- lora
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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
- H04B7/18515—Transmission equipment in satellites or space-based relays
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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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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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Transceivers (AREA)
Abstract
The invention discloses a satellite-borne signal receiving and transmitting device and a satellite-borne signal receiving and transmitting method based on a Lora technology. The device is installed on low rail satellite, includes: the receiving and transmitting antenna is connected with the radio frequency coaxial connector, the input end and the output end of the radio frequency coaxial connector are respectively connected with the output end of the transmitting resonant circuit and the input end of the receiving resonant circuit, the output end of the receiving resonant circuit is connected with the wireless transceiver, the input end of the transmitting resonant circuit is connected with the wireless transceiver, and the wireless transceiver is used for demodulating and modulating Lora signals. According to the invention, the wireless transceiver is arranged on the low-orbit satellite to transmit and receive the Lora signals transmitted by the ground network, so that the wide area communication of the Lora signals can be realized, the transmissible region of the Lora signals is enlarged, and the communication range of the Lora Internet of things system is enlarged.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a satellite-borne signal receiving and transmitting device and a signal receiving and transmitting method based on an Lora technology.
Background
The Lora technology is based on linear spread spectrum modulation, has the advantages of low power consumption and wide coverage, and is one of the most promising technologies for the development of the ground internet of things at present. In recent years, the application of Lora internet of things slowly permeates daily life, such as sharing bicycles, smart homes, smart agriculture and the like. However, when the existing Lora internet of things is used, the transmission of the Lora signals needs to be forwarded by using equipment such as a ground station, and data exchange cannot be performed on the Lora internet of things terminal in an area which cannot be covered by a ground network.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a satellite-borne signal receiving and transmitting device and a signal receiving and transmitting method based on the Lora technology.
Therefore, the invention discloses a satellite-borne signal transceiver based on the Lora technology, which is arranged on a low-earth orbit satellite and comprises: the radio frequency coaxial connector comprises a receiving and transmitting antenna, a radio frequency coaxial connector, a receiving resonant circuit, a transmitting resonant circuit and a wireless transceiver;
the receiving and dispatching antenna with radio frequency coaxial connector connects, radio frequency coaxial connector's input and output are connected respectively the output of transmission resonant circuit with receive resonant circuit's input, receive resonant circuit's output is connected wireless transceiver, the input of transmission resonant circuit is connected wireless transceiver, wireless transceiver is used for demodulating and modulation processing to the Lora signal.
Further, in the above mentioned on-board signal transceiver based on Lora technology, the wireless transceiver is an SX1278 chip of SX127X series.
Further, in the above-mentioned on-board signal transceiver device based on Lora technique, the device further includes a single chip microcomputer, the single chip microcomputer is connected with the wireless transceiver, the single chip microcomputer is used for carrying out parameter configuration to the wireless transceiver.
Further, in the above mentioned onboard signal transceiver based on Lora technology, the device further includes a quartz crystal oscillator, and the quartz crystal oscillator is respectively connected to the wireless transceiver and the single chip microcomputer.
Further, in the above mentioned satellite-borne signal transceiver based on Lora technology, the device is further provided with a power module for supplying power.
Further, in the above mentioned Lora technology based satellite-borne signal transceiver device, the power module includes: the input power supply, the voltage converter and the low dropout linear regulator;
the output end of the input power supply is connected with the input end of the voltage converter, and the output end of the voltage converter is connected with the input end of the low dropout linear regulator.
Furthermore, in the above mentioned satellite-borne signal transceiver device based on Lora technology, the transceiver antenna is a UHF-band antenna with a transceiver band of 423 to 425 MHz.
Further, in the above mentioned Lora technology based satellite-borne signal transceiver, the transceiver antenna adopts a quadrifilar helix structure.
In addition, the invention also discloses a signal receiving and transmitting method, which is implemented by using the satellite-borne signal receiving and transmitting device based on the Lora technology, and comprises the following contents:
the receiving and transmitting antenna receives the Lora signal transmitted by the ground network and transmits the Lora signal to the radio frequency coaxial connector;
the radio frequency coaxial connector sends the Lora signal to the wireless transceiver through the receiving resonance circuit;
the wireless transceiver demodulates the Lora signal to obtain message information corresponding to the Lora signal;
the wireless transceiver analyzes the acquired message information to determine information to be transmitted, and modulates the information to be transmitted to acquire a corresponding Lora signal to be transmitted;
the wireless transceiver sends the Lora signal to be transmitted to the radio frequency coaxial connector through the transmission resonant circuit;
the radio frequency coaxial connector sends the Lora signal to be transmitted to a receiving and transmitting antenna;
the transmitting and receiving antenna broadcasts an Lora signal to be transmitted to the ground network.
The technical scheme of the invention has the following main advantages:
according to the invention, the wireless transceiver is arranged on the low-orbit satellite to transmit and receive the Lora signals transmitted by the ground network, so that the wide area communication of the Lora signals can be realized, the transmissible region of the Lora signals is enlarged, and the communication range of the Lora Internet of things system is enlarged.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a satellite-borne signal transceiver according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a satellite-borne signal transceiver according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a power module in the satellite-borne signal transceiver according to an embodiment of the invention;
fig. 4 is a schematic structural diagram of a power module in a satellite-borne signal transceiver according to an embodiment of the invention;
fig. 5 is a schematic structural diagram of a transceiver antenna according to an embodiment of the invention;
FIG. 6 is a top view of FIG. 5;
fig. 7 is a flowchart of a signal transceiving method according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The technical scheme provided by the embodiment of the invention is described in detail below with reference to the accompanying drawings.
In a first aspect, as shown in fig. 1, an embodiment of the present invention provides a satellite-borne signal transceiver device based on Lora technology, where the device is installed on a low-orbit satellite, and includes: the receiving and transmitting antenna is connected with the radio frequency coaxial connector, the input end and the output end of the radio frequency coaxial connector are respectively connected with the output end of the transmitting resonant circuit and the input end of the receiving resonant circuit, the output end of the receiving resonant circuit is connected with the wireless transceiver, the input end of the transmitting resonant circuit is connected with the wireless transceiver, and the wireless transceiver is used for demodulating and modulating Lora signals.
The structure and the working principle of the satellite-borne signal transceiver provided by an embodiment of the invention are specifically explained below;
specifically, when the satellite-borne signal transceiver device provided in an embodiment of the present invention is used, the transceiver antenna receives an Lora signal transmitted by a ground network and transmits the Lora signal to the radio frequency coaxial connector, the radio frequency coaxial connector receives the Lora signal and transmits the Lora signal to the wireless transceiver through the receiving resonant circuit, the wireless transceiver demodulates the received Lora signal to obtain message information corresponding to the Lora signal, the wireless transceiver analyzes the obtained message information to determine information to be transmitted and modulates the information to be transmitted to obtain a corresponding Lora signal to be transmitted, the wireless transceiver transmits the Lora signal to be transmitted to the radio frequency coaxial connector through the transmitting resonant circuit, the radio frequency coaxial connector transmits the Lora signal to be transmitted to the transceiver antenna, and the transceiver antenna broadcasts the Lora signal to be transmitted to the ground network.
Therefore, the Lora technology-based satellite-borne signal transceiver provided by the embodiment of the invention can realize wide area communication of the Lora signal, expand the transmittable area of the Lora signal and improve the communication range of the Lora internet-of-things system by arranging the wireless transceiver on the low-earth satellite to transmit and receive the Lora signal transmitted by the ground network.
Optionally, in an embodiment of the present invention, the orbital height of the low-earth orbit satellite may be 500-600 km.
Further, in order to facilitate the processing of the Lora signals by the wireless transceiver, in one embodiment of the present invention, the wireless transceiver is an SX1278 chip in the SX127X series.
The SX1278 chip adopts a Lora spread spectrum modulation and demodulation technology, has higher integration level, comprises an integrated circuit with a radio frequency function and a logic control function, and internally integrates a voltage-controlled oscillator, a phase-locked loop circuit, a power amplification circuit, a low-noise amplification circuit, a modulation and demodulation circuit, a frequency converter, a middle amplification circuit and the like, and can conveniently perform demodulation processing, modulation processing, data analysis and the like on a received Lora signal.
Furthermore, in an embodiment of the present invention, the satellite-borne signal transceiver device may further include a single chip microcomputer, where the single chip microcomputer is connected to the wireless transceiver, and the single chip microcomputer is used to perform parameter configuration on the wireless transceiver.
Optionally, based on the specific structure of the selected wireless transceiver, the single chip microcomputer may be a 51-series single chip microcomputer, specifically, C8051F040, and the single chip microcomputer may be connected to the wireless transceiver through an SPI interface (serial peripheral interface). Thus, the C8051F040 can be used for conveniently configuring the working parameters of the SX1278 chip, and the structure that the C8051F040 and the SX1278 are matched for use can realize the miniaturization, low power consumption and reconfigurable design of the device.
In an embodiment of the present invention, the receiving resonant tank can be used for adjusting the receiving sensitivity of the wireless transceiver, and the transmitting resonant tank can be used for adjusting the transmitting power of the wireless transceiver.
Wherein, the receiving resonant circuit can adopt a low noise amplifier, and the transmitting resonant circuit can adopt a super linear power amplifier.
Furthermore, in an embodiment of the present invention, the satellite-borne signal transceiver device may further include a quartz crystal oscillator, the quartz crystal oscillator is respectively connected to the wireless transceiver and the single chip microcomputer, and the quartz crystal oscillator is used to provide a stable operating clock for the wireless transceiver and the single chip microcomputer.
Further, as shown in fig. 1, in an embodiment of the present invention, the satellite-borne signal transceiver is further provided with a power module for supplying power.
As shown in fig. 3, in an embodiment of the present invention, a power module includes: the input power supply, the voltage converter and the low dropout linear regulator; the output end of the input power supply is connected with the input end of the voltage converter, and the output end of the voltage converter is connected with the input end of the low dropout linear regulator.
Specifically, as shown in fig. 4, based on the specific structure of the satellite-borne signal transceiver set forth above, the input power may be a 28V DC power, the voltage converter may be a DC/DC converter of TPS5430D, the low dropout regulator may be a TPS73601DBVR, the 28V DC power may be converted into a 6.2V power through an overvoltage converter TPS5430D for supplying power to the transmitting resonant tank, and the 6.2V power may be converted into a 3.3V power through a voltage converter MAX1775 for supplying power to SX1278 and C8051F 040.
Further, in an embodiment of the present invention, since the satellite-borne signal transceiver is configured to receive a Lora signal from a ground Lora internet of things system, the transceiver antenna may be a UHF-band antenna with a transceiver band of 423 to 425 MHz.
As shown in fig. 5 and 6, in an embodiment of the present invention, the transceiver antenna may adopt a quadrifilar helix structure.
Optionally, based on the specific structure of the satellite-borne signal transceiver set as described above, the polarization mode of the quadrifilar helix antenna is linear polarization, the impedance is 50 Ω, the standing-wave ratio is set within 1.5, the antenna height is set within 235mm, the antenna diameter is set within 180mm, the gain of the dual main lobe of the antenna within ± 30 ° is set above 3dBi, and the gain of the dual main lobe of the antenna within ± 65 ° is set above 0 dBi.
In an embodiment of the present invention, the transceiver antenna may be connected to the rf coaxial connector through the SMA interface.
In a second aspect, an embodiment of the present invention further provides a signal transceiving method, which is implemented by using the above mentioned on-board signal transceiving apparatus based on Lora technology, and the method includes the following steps:
the receiving and transmitting antenna receives the Lora signal transmitted by the ground network and transmits the Lora signal to the radio frequency coaxial connector;
the radio frequency coaxial connector sends the Lora signal to the wireless transceiver through the receiving resonance circuit;
the wireless transceiver demodulates the Lora signal to obtain message information corresponding to the Lora signal;
the wireless transceiver analyzes the acquired message information to determine information to be transmitted, and modulates the information to be transmitted to acquire a corresponding Lora signal to be transmitted;
the wireless transceiver sends the Lora signal to be transmitted to the radio frequency coaxial connector through the transmission resonant circuit;
the radio frequency coaxial connector sends the Lora signal to be transmitted to a receiving and transmitting antenna;
the transmitting and receiving antenna broadcasts an Lora signal to be transmitted to the ground network.
Specifically, the receiving and transmitting antenna receives a Lora signal transmitted by a ground network and transmits the Lora signal to the radio frequency coaxial connector, the radio frequency coaxial connector receives the Lora signal and transmits the Lora signal to the wireless transceiver through the receiving resonant circuit, the wireless transceiver demodulates the received Lora signal and acquires message information corresponding to the Lora signal, the wireless transceiver analyzes the acquired message information to determine information to be transmitted and modulates the information to be transmitted to acquire a corresponding Lora signal to be transmitted, the wireless transceiver transmits the Lora signal to be transmitted to the radio frequency coaxial connector through the transmitting resonant circuit, the radio frequency coaxial connector transmits the Lora signal to be transmitted to the receiving and transmitting antenna, and the receiving and transmitting antenna broadcasts the Lora signal to be transmitted to the ground network.
Therefore, the on-board signal transceiving device and the signal transceiving method based on the Lora technology provided by the embodiment of the invention can realize wide area communication of the Lora signal, expand the transmittable area of the Lora signal and improve the communication range of the Lora internet of things system by arranging the wireless transceiver on the low-earth satellite to transmit and receive the Lora signal transmitted by the ground network.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. In addition, "front", "rear", "left", "right", "upper" and "lower" in this document are referred to the placement states shown in the drawings.
Finally, it should be noted that: the above examples are only for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. A satellite-borne signal transceiver device based on Lora technology, characterized in that, the device is installed on low earth orbit satellite, includes: the radio frequency coaxial connector comprises a receiving and transmitting antenna, a radio frequency coaxial connector, a receiving resonant circuit, a transmitting resonant circuit and a wireless transceiver;
the receiving and dispatching antenna with radio frequency coaxial connector connects, radio frequency coaxial connector's input and output are connected respectively the output of transmission resonant circuit with receive resonant circuit's input, receive resonant circuit's output is connected wireless transceiver, the input of transmission resonant circuit is connected wireless transceiver, wireless transceiver is used for demodulating and modulation processing to the Lora signal.
2. The Lora technology based satellite signal transceiver device according to claim 1, wherein the wireless transceiver is an SX1278 chip of SX127X series.
3. The Lora technology-based satellite-borne signal transmitting and receiving device according to claim 2, further comprising a single chip microcomputer, wherein the single chip microcomputer is connected with the wireless transceiver, and the single chip microcomputer is used for conducting parameter configuration on the wireless transceiver.
4. The Lora technology-based satellite-borne signal transmitting and receiving device according to claim 3, further comprising a quartz crystal oscillator, wherein the quartz crystal oscillator is connected with the wireless transceiver and the single chip microcomputer respectively.
5. The Lora technology based satellite-borne signal transmitting and receiving device according to any one of claims 1-4, characterized in that the device is further provided with a power supply module for supplying power.
6. The Lora technology-based satellite-borne signal transmitting and receiving device according to claim 5, wherein the power supply module comprises: the input power supply, the voltage converter and the low dropout linear regulator;
the output end of the input power supply is connected with the input end of the voltage converter, and the output end of the voltage converter is connected with the input end of the low dropout linear regulator.
7. The Lora technology-based satellite-borne signal transmitting and receiving device as claimed in any one of claims 1 to 6, wherein the transmitting and receiving antenna is a UHF (ultra high frequency) band antenna with a transmitting and receiving frequency band of 423-425 MHz.
8. The Lora-technology-based satellite-borne signal transmitting and receiving device according to claim 7, wherein the transmitting and receiving antenna is of a four-arm spiral structure.
9. A method for transceiving signals, the method being implemented by the on-board signal transceiving apparatus based on Lora technology according to any one of claims 1 to 8, the method comprising:
the receiving and transmitting antenna receives the Lora signal transmitted by the ground network and transmits the Lora signal to the radio frequency coaxial connector;
the radio frequency coaxial connector sends the Lora signal to the wireless transceiver through the receiving resonance circuit;
the wireless transceiver demodulates the Lora signal to obtain message information corresponding to the Lora signal;
the wireless transceiver analyzes the acquired message information to determine information to be transmitted, and modulates the information to be transmitted to acquire a corresponding Lora signal to be transmitted;
the wireless transceiver sends the Lora signal to be transmitted to the radio frequency coaxial connector through the transmission resonant circuit;
the radio frequency coaxial connector sends the Lora signal to be transmitted to a receiving and transmitting antenna;
the transmitting and receiving antenna broadcasts an Lora signal to be transmitted to the ground network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010494734.5A CN111835399A (en) | 2020-06-03 | 2020-06-03 | Satellite-borne signal receiving and transmitting device and method based on Lora technology |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010494734.5A CN111835399A (en) | 2020-06-03 | 2020-06-03 | Satellite-borne signal receiving and transmitting device and method based on Lora technology |
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| CN107146420A (en) * | 2017-07-18 | 2017-09-08 | 迈锐数据（北京）有限公司 | A kind of detection device of parking space state and the detection method of parking space state |
| CN107947828A (en) * | 2017-11-21 | 2018-04-20 | 湖南瓴星空间信息技术有限公司 | A kind of spaceborne things-internet gateway and Internet of Things communication means |
| CN110324076A (en) * | 2019-04-30 | 2019-10-11 | 北京曦华科技发展有限公司 | A kind of space-based network monitoring system for things and monitoring method |
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2020
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107105488A (en) * | 2017-06-26 | 2017-08-29 | 东华理工大学 | A kind of meter reading repeater control method and meter reading repeater based on LORA communications |
| CN107146420A (en) * | 2017-07-18 | 2017-09-08 | 迈锐数据（北京）有限公司 | A kind of detection device of parking space state and the detection method of parking space state |
| CN107947828A (en) * | 2017-11-21 | 2018-04-20 | 湖南瓴星空间信息技术有限公司 | A kind of spaceborne things-internet gateway and Internet of Things communication means |
| CN110324076A (en) * | 2019-04-30 | 2019-10-11 | 北京曦华科技发展有限公司 | A kind of space-based network monitoring system for things and monitoring method |
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