Multi-channel Reconfigurable Space-based Internet of Things Signal Forwarding Device

Abstract

The present invention discloses a multi-channel reconfigurable space-based Internet of Things signal forwarding device, comprising: a radio frequency unit, connected to the baseband unit, for receiving and processing external signals and sending them to the baseband unit, and processing and transmitting transmitted signals; a data transmission unit, connected to the baseband unit, for generating wireless signals according to received data, transmitting the signals downward, and receiving and processing external signals; a baseband unit, including a first baseband unit and a second baseband unit. The first baseband unit is provided with a plurality of CHIRP radio frequency chips and a first control sub-unit, and the second baseband unit is provided with a plurality of LoRa radio frequency chips and a second control sub-unit. The baseband unit is used for demodulating received signals according to demodulation configurations, storing demodulated data, determining transmitted data, modulating the data according to modulation configurations to generate transmitted signals and sending the transmitted signals to the radio frequency unit, and reading data and sending it to the data transmission unit. The present invention can achieve parallel reception and processing of multiple-channel CHIRP Internet of Things signals and multiple-channel LoRa Internet of Things signals.

Description

Technical Field

[0001] The present invention relates to the technical field of information processing, and particularly relates to a multi-channel reconfigurable space-based Internet of Things signal forwarding device. Background Art

[0002] The interconnection of all things has become an inherent requirement for the development of Internet of Things applications. Wireless connection technologies are no longer satisfied with short-distance communication and are developing towards longer distances and wider coverage. As a result, low-power wide-area networks have emerged. Among them, LoRa, as a wireless technology in low-power wide-area networks, has a relatively mature industrial chain and earlier commercial applications compared with other wireless technologies such as Sigfox, NB-IoT, and Zigbee. Based on LoRa technology, currently, multi-channel LoRa signal parallel access is mainly achieved by using a radio frequency module designed based on the SX1302 chip. The SX1302 chip is a new generation of LoRa gateway chip launched by Semtech Corporation. Its front-end SX1250 chip can support dynamic adjustment of the spreading factor SF5 - SF12 and has 10 programmable parallel receiving channels.

[0003] At the same time, with the rapid development of the autonomy, networking, and communication technologies of unmanned aerial vehicles (UAVs), using multiple UAVs to cooperate and combine in a formation to complete tasks together has become a widely used UAV working mode. In order to improve the signal coverage range and expand the application range of Internet of Things terminals, there is currently research on combining Internet of Things receiving devices with UAV platforms to build an Internet of Things information collection system based on a space-based platform. Existing Internet of Things information collection systems based on space-based platforms usually use LoRa-DTU devices to complete the functions of signal collection and relay backhaul for multiple ground-based Internet of Things terminals. They have been widely used in many fields such as power, agriculture, geology, and disaster relief. LoRa-DTU devices are based on LoRa modulation and spreading technology, use the LoRa network to provide a wireless data transmission link for Internet of Things terminals, and can support automatic relay and retransmission to extend the wireless communication distance.

[0004] However, the bandwidth of the radio frequency front-end filter of existing LoRa gateway chips such as SX1302 is 800KHz. If there are strong interference signals within this 800KHz bandwidth, it will cause saturation of the front-end AGC (Automatic Gain Control) of SX1302, affecting the receiving performance and resulting in all channels within the 800KHz bandwidth being unable to work properly. When existing LoRa-DTU devices are used as long-distance relay backhaul nodes for multiple ground-based Internet of Things terminals, there are problems of limited channel bandwidth and insufficient communication distance, and the link robustness cannot be improved through self-organizing network methods. Summary of the Invention

[0005] To solve some or all of the technical problems existing in the above-mentioned prior art, the present invention provides a multi-channel reconfigurable space-based Internet of Things signal forwarding device.

[0006] The technical solution of the present invention is as follows:

[0007] There is provided a multi-channel reconfigurable space-based Internet of Things signal forwarding device, including:

[0008] The multi-channel reconfigurable space-based Internet of Things signal forwarding device is characterized by including:

[0009] A radio frequency unit, connected to the baseband unit, for receiving external wireless signals, amplifying the wireless signals and sending them to the baseband unit, and for amplifying the transmission signals sent by the baseband unit and sending them to the outside;

[0010] A data transmission unit, connected to the baseband unit, for generating wireless signals according to the data sent by the baseband unit, sending the generated wireless signals to an external receiving terminal, and for receiving and processing external wireless signals;

[0011] The baseband unit includes a first baseband unit and a second baseband unit. The first baseband unit is provided with a plurality of CHIRP radio frequency chips and a first control sub-unit. The plurality of CHIRP radio frequency chips are connected to the first control sub-unit. The CHIRP radio frequency chips are used for demodulating received signals according to a preset demodulation configuration and sending the demodulated data to the first control sub-unit, and for modulating received data according to a preset modulation configuration to generate transmission signals and sending the transmission signals to the radio frequency unit. The first control sub-unit is used for storing data in a local memory, reading the data in the local memory and sending it to the data transmission unit, and for determining transmission data and sending it to the CHIRP radio frequency chips;

[0012] The second baseband unit is provided with a plurality of LoRa radio frequency chips and a second control sub-unit. The plurality of LoRa radio frequency chips are connected to the second control sub-unit. The LoRa radio frequency chips are used for demodulating received signals according to a preset demodulation configuration and sending the demodulated data to the second control sub-unit, and for modulating received data according to a preset modulation configuration to generate transmission signals and sending the transmission signals to the radio frequency unit. The second control sub-unit is used for storing data in a local memory, reading the data in the local memory and sending it to the data transmission unit, and for determining transmission data and sending it to the LoRa radio frequency chips.

[0013] In some possible implementation manners, the radio frequency unit includes: a receiving channel, a transmitting channel, a radio frequency switch, and a UHF band antenna;

[0014] The RF switch is respectively connected to the receiving channel, the transmitting channel, and the UHF band antenna. The UHF band antenna is used for receiving and transmitting UHF band signals. The RF switch is used to send the received signals transmitted by the UHF band antenna to the receiving channel, and to send the transmission signals transmitted by the transmitting channel to the UHF band antenna. The receiving channel is used to amplify the received signals and send the processed received signals to the baseband unit. The transmitting channel is used to receive and amplify the transmission signals sent by the baseband unit.

[0015] In some possible implementation manners, the receiving channel includes:

[0016] A limiter, whose input end is connected to the RF switch and output end is connected to the input end of an adjustable attenuator;

[0017] The adjustable attenuator, whose output end is connected to the input end of a first low-noise amplifier;

[0018] The first low-noise amplifier, whose output end is connected to the input end of a first surface acoustic wave filter;

[0019] The first surface acoustic wave filter, whose output end is connected to the input end of a second low-noise amplifier;

[0020] The second low-noise amplifier, whose output end is connected to the input end of a second surface acoustic wave filter;

[0021] The second surface acoustic wave filter, whose output end is connected to the input end of a four-channel power divider;

[0022] The four-channel power divider, one of its outputs is connected to the first baseband unit, one output is connected to the second baseband unit, and one output is connected to the input end of a detector;

[0023] The detector, whose output end is connected to the input end of an AGC controller;

[0024] The AGC controller, whose output end is connected to the adjustable attenuator, and is used to adjust the attenuation value of the adjustable attenuator according to the signal peak data collected by the detector.

[0025] In some possible implementation manners, the transmitting channel includes:

[0026] A two-channel combiner, one of its inputs is connected to the first baseband unit and one input is connected to the second baseband unit;

[0027] A third surface acoustic wave filter, whose input end is connected to the output end of the two-channel combiner and output end is connected to the input end of a power amplifier;

[0028] The output terminal of the power amplifier is connected to the RF switch.

[0029] In some possible implementation manners, an LC filter is connected between the RF switch and the UHF-band antenna, and the LC filter is used for performing out-of-band signal suppression processing.

[0030] In some possible implementation manners, the data transmission unit includes:

[0031] A microprocessor, which is respectively connected to the first baseband unit and the second baseband unit, and is used for performing data interaction with the first baseband unit and the second baseband unit;

[0032] A core processor board, which is respectively connected to the microprocessor and the RF chip, and is used for performing data interaction with the microprocessor and the RF chip, and for controlling the RF chip;

[0033] The RF chip, which is connected to the L-band antenna, is used for generating a transmission signal and sending it to the L-band antenna, and for processing the received signal sent by the L-band antenna;

[0034] The L-band antenna is used for receiving and transmitting L-band signals.

[0035] In some possible implementation manners, the first baseband unit includes:

[0036] Three four-channel power dividers, where the input terminal of one of the four-channel power dividers is connected to the RF unit, and the four outputs are respectively connected to the input terminals of the other two four-channel power dividers and two CHIRP RF chips, and the four outputs of the other two four-channel power dividers are each connected to four CHIRP RF chips;

[0037] Eleven CHIRP RF chips, where ten of the CHIRP RF chips are respectively connected to the outputs of the four-channel power divider and the first control sub-unit, and are used for demodulating the received signal according to a preset demodulation configuration and sending the demodulated data to the first control sub-unit, and the other CHIRP RF chip is respectively connected to the first control sub-unit and the input terminal of the adjustable attenuator, and is used for modulating the received data according to a preset modulation configuration to generate a transmission signal and sending the transmission signal to the adjustable attenuator;

[0038] The output terminal of the adjustable attenuator is connected to the RF unit, and is used for adjusting the intensity of the transmission signal sent by the CHIRP RF chip and sending the adjusted transmission signal to the RF unit;

[0039] The first control subunit, connected to the data transmission unit, is configured to store data in the local memory, read the data in the local memory and send it to the data transmission unit, and determine the transmission data and send it to the CHIRP radio frequency chip.

[0040] In some possible implementation manners, the second baseband unit includes:

[0041] Four-channel power dividers, there are three of them. The input end of one of the four-channel power dividers is connected to the radio frequency unit, and the four outputs are respectively connected to the input ends of the other two four-channel power dividers and two LoRa radio frequency chips. The four outputs of the other two four-channel power dividers are each connected to four LoRa radio frequency chips;

[0042] The LoRa radio frequency chips, there are eleven of them. Ten of the LoRa radio frequency chips are respectively connected to the outputs of the four-channel power dividers and the second control subunit, and are configured to demodulate the received signal according to a preset demodulation configuration and send the demodulated data to the second control subunit. The other LoRa radio frequency chip is respectively connected to the second control subunit and the input end of the adjustable attenuator, and is configured to modulate the received data according to a preset modulation configuration to generate a transmission signal and send the transmission signal to the adjustable attenuator;

[0043] The adjustable attenuator, whose output end is connected to the radio frequency unit, is configured to adjust the intensity of the transmission signal sent by the LoRa radio frequency chip and send the adjusted transmission signal to the radio frequency unit;

[0044] The second control subunit, connected to the data transmission unit, is configured to store data in the local memory, read the data in the local memory and send it to the data transmission unit, and determine the transmission data and send it to the LoRa radio frequency chip.

[0045] In some possible implementation manners, a power supply and signal bus is further included. The power supply and signal bus is respectively connected to the radio frequency unit, the data transmission unit, the first baseband unit and the second baseband unit, and is configured to supply power and transmit other signals except radio frequency signals.

[0046] In some possible implementation manners, the radio frequency unit, the data transmission unit, the first baseband unit and the second baseband unit are spliced using a stacked structure.

[0047] The main advantages of the technical solution of the present invention are as follows:

[0048] The multi-channel reconfigurable space-based Internet of Things signal forwarding device of the present invention can achieve parallel reception and processing of multiple CHIRP narrowband Internet of Things signals and multiple LoRa narrowband Internet of Things signals by adopting a frequency division multiplexing processing method of multiple CHIRP radio frequency chips and multiple LoRa radio frequency chips, improving the multi-user concurrent reception ability of the device; by constructing a data backhaul link in a self-organizing network mode, it can increase the data backhaul distance, improve the data capacity of the transmission channel, meet the bandwidth requirements for parallel acquisition and backhaul of multiple channels of data, and improve the robustness of the communication link. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of the present invention, and the illustrative embodiments and descriptions thereof are used to explain the present invention without unduly limiting the present invention. In the drawings:

[0050] Figure 1 is a structural block diagram of a multi-channel reconfigurable space-based Internet of Things signal forwarding device according to an embodiment of the present invention;

[0051] Figure 2 is a specific structural block diagram of a multi-channel reconfigurable space-based Internet of Things signal forwarding device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0052] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0053] The technical solutions provided by the embodiments of the present invention will be described in detail below with reference to the drawings.

[0054] Refer to Figure 1 , an embodiment of the present invention provides a multi-channel reconfigurable space-based Internet of Things signal forwarding device, which includes:

[0055] A radio frequency unit, connected to the baseband unit, for receiving external wireless signals, amplifying the wireless signals and sending them to the baseband unit, and for amplifying the transmission signals sent by the baseband unit and sending them to the outside;

[0056] A data transmission unit, connected to the baseband unit, for generating wireless signals according to the data sent by the baseband unit, sending the generated wireless signals to an external receiving terminal, and for receiving and processing external wireless signals;

[0057] Baseband unit, including a first baseband unit and a second baseband unit. The first baseband unit is provided with a plurality of CHIRP radio frequency chips and a first control subunit. The plurality of CHIRP radio frequency chips are connected to the first control subunit. The CHIRP radio frequency chips are used to demodulate the received signal according to a preset demodulation configuration and send the demodulated data to the first control subunit, and are used to modulate the received data according to a preset modulation configuration to generate a transmission signal and send the transmission signal to the radio frequency unit. The first control subunit is used to store data in the local memory, read the data in the local memory and send it to the data transmission unit, and determine the transmission data and send it to the CHIRP radio frequency chips;

[0058] The second baseband unit is provided with a plurality of LoRa radio frequency chips and a second control subunit. The plurality of LoRa radio frequency chips are connected to the second control subunit. The LoRa radio frequency chips are used to demodulate the received signal according to a preset demodulation configuration and send the demodulated data to the second control subunit, and are used to modulate the received data according to a preset modulation configuration to generate a transmission signal and send the transmission signal to the radio frequency unit. The second control subunit is used to store data in the local memory, read the data in the local memory and send it to the data transmission unit, and determine the transmission data and send it to the LoRa radio frequency chips.

[0059] Specifically, when the multi-channel reconfigurable space-based Internet of Things signal forwarding device provided by an embodiment of the present invention is in use, the radio frequency unit receives in real time the wireless signals of the corresponding frequency band from the outside, amplifies the received wireless signals and then sends them to the first baseband unit and the second baseband unit. The first baseband unit performs parallel demodulation processing on the received wireless signals through a plurality of corresponding CHIRP radio frequency chips, and stores the demodulated data in the local memory through the first control sub-unit. The second baseband unit performs parallel demodulation processing on the received wireless signals through a plurality of corresponding LoRa radio frequency chips, and stores the demodulated data in the local memory through the second control sub-unit. When data needs to be sent out, the first control sub-unit determines the data to be sent and reads it and sends it to the corresponding CHIRP radio frequency chip. The CHIRP radio frequency chip modulates the data to generate a transmission signal, and sends the transmission signal to the radio frequency unit. The second control sub-unit determines the data to be sent and reads it and sends it to the corresponding LoRa radio frequency chip. The LoRa radio frequency chip modulates the data to generate a transmission signal, and sends the transmission signal to the radio frequency unit. The radio frequency unit combines and amplifies the two received transmission signals and then transmits them to the outside. When data needs to be downlinked to an external receiving terminal, the first control sub-unit determines the data to be downlinked and reads it and sends it to the data transmission unit. The second control sub-unit determines the data to be downlinked and reads it and sends it to the data transmission unit. The data transmission unit generates a wireless signal according to the data sent by the first baseband unit and the second baseband unit, and sends the generated wireless signal to the external receiving terminal. At the same time, the data transmission unit receives and processes in real time the wireless signals of the corresponding frequency band from the outside, and performs data interaction with the first baseband unit and the second baseband unit when necessary.

[0060] The multi-channel reconfigurable space-based Internet of Things signal forwarding device provided by an embodiment of the present invention can realize the parallel reception and processing of multiple CHIRP narrow-band Internet of Things signals and multiple LoRa narrow-band Internet of Things signals by adopting the frequency division multiplexing processing method of a plurality of CHIRP radio frequency chips and a plurality of LoRa radio frequency chips, improving the multi-user concurrent reception ability of the device; by adopting the self-organizing network method to construct the data backhaul link, it can increase the data backhaul distance, improve the data capacity of the transmission channel, meet the bandwidth requirements of parallel acquisition and backhaul of multiple channels of data, and improve the robustness of the communication link.

[0061] Further, referring to Figure 2 , in an embodiment of the present invention, the radio frequency unit includes: a receiving channel, a transmitting channel, a radio frequency switch, and a UHF band antenna;

[0062] The RF switch is respectively connected to the receiving channel, the transmitting channel and the UHF band antenna. The UHF band antenna is used for receiving and transmitting UHF band signals. The RF switch is used to send the received signals transmitted by the UHF band antenna to the receiving channel, and to send the transmitted signals transmitted by the transmitting channel to the UHF band antenna. The receiving channel is used to amplify the received signals and send the processed received signals to the baseband unit. The transmitting channel is used to receive and amplify the transmitted signals sent by the baseband unit.

[0063] In an embodiment of the present invention, by using the RF switch to couple the transmitting channel and the receiving channel, the combination of the receiving and transmitting channels can be realized, which is convenient for signal receiving and transmitting processing.

[0064] Further, referring to Figure 2 , in an embodiment of the present invention, the receiving channel includes:

[0065] A limiter, whose input end is connected to the RF switch and the output end is connected to the input end of the adjustable attenuator;

[0066] An adjustable attenuator, whose output end is connected to the input end of the first low-noise amplifier;

[0067] The first low-noise amplifier, whose output end is connected to the input end of the first surface acoustic wave filter;

[0068] The first surface acoustic wave filter, whose output end is connected to the input end of the second low-noise amplifier;

[0069] The second low-noise amplifier, whose output end is connected to the input end of the second surface acoustic wave filter;

[0070] The second surface acoustic wave filter, whose output end is connected to the input end of the four-channel power divider;

[0071] The four-channel power divider, one of its outputs is connected to the first baseband unit, one output is connected to the second baseband unit, and one output is connected to the input end of the detector;

[0072] The detector, whose output end is connected to the input end of the AGC controller;

[0073] The AGC controller, whose output end is connected to the adjustable attenuator, and is used to adjust the attenuation value of the adjustable attenuator according to the signal peak data collected by the detector.

[0074] In one embodiment of the present invention, in the receiving channel, a limiter is used to release strong signals exceeding a set threshold to limit the received signal input by the RF switch within a certain range; a variable attenuator is used to control the signal budget of the receiving link; a low-noise amplifier (LNA) is used to amplify the received signal; a surface acoustic wave filter is used to filter out-of-band interference signals; a four-channel power divider is used to divide the amplified received signal into four outputs, one output to the first baseband unit, one output to the second baseband unit, and one output to a detector; the detector is used to detect the peak value of the amplified signal; the AGC controller is used to process the peak value data of the signal collected by the detector and adjust the attenuation value of the variable attenuator. Specifically, when the peak value of the signal is too high, the attenuation value of the variable attenuator is increased, and when the peak value of the signal is too low, the attenuation value of the variable attenuator is decreased to ensure that the input signal strength is within a reasonable range. Among them, the limiter can be selected as SMP1330-005, the variable attenuator can be selected as PE43711S, the low-noise amplifier can be selected as BGU8051, the surface acoustic wave filter can be selected as RBP-415+, the four-channel power divider can be selected as AD4PS-1+, the detector can be selected as ADL5910, and the AGC controller can be selected as HC32L130F8UA.

[0075] In one embodiment of the present invention, by cascading and amplifying with two-stage low-noise amplifiers in the receiving channel, the receiving gain of the signal can be guaranteed, and the received signals after splitting can meet the receiving sensitivity requirements of the CHIRP RF chip and the LoRa RF chip, meeting the gain requirements of the device.

[0076] Further, referring to Figure 2 , in one embodiment of the present invention, the transmitting channel includes:

[0077] A two-channel combiner, one input of which is connected to the first baseband unit and the other input is connected to the second baseband unit;

[0078] A third surface acoustic wave filter, whose input end is connected to the output end of the two-channel combiner and the output end is connected to the input end of the power amplifier;

[0079] A power amplifier, whose output end is connected to the RF switch.

[0080] In one embodiment of the present invention, in the transmitting channel, the two-channel combiner is used to combine the two input signals into one output to realize the parallel access of the transmitting signals of the first baseband unit and the second baseband unit; the surface acoustic wave filter is used to filter out-of-band interference signals; the power amplifier is used to amplify the power of the transmitting signal so that the transmitting power of the transmitting signal is greater than the set value. Among them, the two-channel combiner can be selected as ADP-2-1W+, the surface acoustic wave filter can be selected as RBP-415+, and the power amplifier can be selected as RF6886.

[0081] Further, referring to Figure 2 , in an embodiment of the present invention, an LC filter is connected between the RF switch and the UHF band antenna, and the LC filter is used for out-of-band signal suppression processing.

[0082] By setting the LC filter, out-of-band signal suppression can be completed, and the interference of out-of-band signals to the receiving channel and the interference of the transmitting channel to other carried devices on the platform can be solved. Among them, the RF switch can be selected as MASW-000834-13560T, and the LC filter can be selected as LFCG-490+.

[0083] In an embodiment of the present invention, the LC filter is connected to the UHF band antenna through a RF connector and a RF cable. The RF connector is, for example, an SMA connector.

[0084] Further, referring to Figure 2 , in an embodiment of the present invention, the data transmission unit includes:

[0085] A microprocessor, which is respectively connected to the first baseband unit and the second baseband unit, and is used for data interaction with the first baseband unit and the second baseband unit;

[0086] A core processor board, which is respectively connected to the microprocessor and the RF chip, and is used for data interaction with the microprocessor and the RF chip, and for controlling the RF chip;

[0087] A RF chip, which is connected to the L band antenna, and is used for generating a transmission signal and sending it to the L band antenna, and for processing the received signal sent by the L band antenna;

[0088] An L band antenna, which is used for receiving and transmitting L band signals.

[0089] Specifically, the microprocessor is used to perform data transmission interactions with the first baseband unit and the second baseband unit according to given operations or instructions when needed, and to perform data transmission interactions with the core processor board; the core processor board is used to perform data transmission interactions with the radio frequency chip and to control and adjust the parameter configuration of the radio frequency chip according to given operations or instructions; the radio frequency chip is used to generate a wireless signal based on the data to be downloaded, mix, amplify the signal and then send it to the L-band antenna so that the L-band antenna emits the signal, and is also used to amplify, filter, mix and analyze the radio frequency signal sent by the L-band antenna; for example, the radio frequency chip mixes the generated 2417 MHz signal to 1438 MHz, and then sends it to the L-band antenna after being amplified by two-stage amplifiers; amplify, filter, mix and analyze the 1438 MHz radio frequency signal sent by the L-band antenna. Among them, the microprocessor can select HC32L130F8UA, the core processor board can select AR9344, and the radio frequency chip can select AR9582.

[0090] In an embodiment of the present invention, the microprocessor is connected to the baseband unit through the UART interface and the SPI interface. The microprocessor and the baseband unit perform data transmission interactions through the inter-board signal bus connected between the interfaces. The microprocessor is connected to the core processor board through the network interface. The core processor board is connected to the radio frequency chip through the PCIE bus. The radio frequency chip is connected to the L-band antenna through the radio frequency connector and the radio frequency cable. Among them, the network interface is, for example, a UDP interface, and the UDP interface can select W5500. The radio frequency connector is, for example, an SMA connector.

[0091] Furthermore, in an embodiment of the present invention, the core processor board is further provided with a flash memory sub-unit, a memory sub-unit and a GPS sub-unit. The flash memory sub-unit is used to provide power-off storage space for critical data of the data transmission unit. The memory sub-unit is used to provide algorithm operation cache space for the data transmission unit. The GPS sub-unit is used to implement device positioning. Among them, the flash memory sub-unit uses NORFLASH, and the memory sub-unit uses DDR2.

[0092] Furthermore, referring to Figure 2 , in an embodiment of the present invention, the first baseband unit includes:

[0093] Four-channel power dividers, including three. The input end of one four-channel power divider is connected to the radio frequency unit. The four outputs are respectively connected to the input ends of the other two four-channel power dividers and two CHIRP radio frequency chips. The four outputs of the other two four-channel power dividers are each connected to four CHIRP radio frequency chips;

[0094] The CHIRP RF chip includes eleven chips. Ten of the CHIRP RF chips are respectively connected to the output of the four-channel power divider and the first control subunit, and are used to demodulate the received signal according to a preset demodulation configuration and send the demodulated data to the first control subunit. The other CHIRP RF chip is respectively connected to the first control subunit and the input end of the adjustable attenuator, and is used to modulate the received data according to a preset modulation configuration to generate a transmission signal and send the transmission signal to the adjustable attenuator;

[0095] The adjustable attenuator, whose output end is connected to the RF unit, is used to adjust the intensity of the transmission signal sent by the CHIRP RF chip and send the adjusted transmission signal to the RF unit;

[0096] The first control subunit is connected to the data transmission unit, and is used to store data in the local memory, read the data in the local memory and send it to the data transmission unit, and determine the transmission data and send it to the CHIRP RF chip.

[0097] Specifically, when the first baseband unit is in use, the RF signal sent by the RF unit is sent to 10 CHIRP RF chips through the set two-stage four-channel power divider. The 10 CHIRP RF chips respectively demodulate the received signal according to the preset demodulation configuration and send the demodulated data to the first control subunit. The first control subunit stores the data in the local memory. When data needs to be sent out, the first control subunit determines the data to be sent and reads it and sends it to the corresponding 1 CHIRP RF chip. The CHIRP RF chip modulates the data to generate a transmission signal and sends the transmission signal to the adjustable attenuator. The adjustable attenuator adjusts the signal intensity of the transmission signal so that the signal intensity meets the input requirements of the RF unit, and sends the adjusted transmission signal to the RF unit. When data needs to be downloaded, the first control subunit determines the data to be downloaded and reads it and sends it to the data transmission unit.

[0098] In an embodiment of the present invention, the first control subunit can also control and adjust the parameter configurations of multiple CHIRP RF chips according to given operations or instructions, so as to realize that the link parameters of each channel can be configured as required, without being limited by the RF bandwidth constraints of traditional gateway chips.

[0099] In an embodiment of the present invention, the first control subunit uses a microprocessor. Among them, the microprocessor can select HC32L130F8UA, the four-channel power divider can select AD4PS-1+, the CHIRP RF chip uses JTM1000 RF chip, and the adjustable attenuator can select PE43711S.

[0100] In an embodiment of the present invention, the four-channel power divider in the first baseband unit is connected to the four-channel power divider in the radio frequency unit through a radio frequency connector, and the adjustable attenuator in the first baseband unit is connected to the two-channel combiner in the radio frequency unit through a radio frequency connector. The radio frequency connector is, for example, an SMA connector.

[0101] Further, referring to Figure 2 , in an embodiment of the present invention, the second baseband unit includes:

[0102] Four-channel power dividers, including three. The input end of one of the four-channel power dividers is connected to the radio frequency unit, and the four outputs are respectively connected to the input ends of the other two four-channel power dividers and two LoRa radio frequency chips. The four outputs of the other two four-channel power dividers are each connected to four LoRa radio frequency chips;

[0103] LoRa radio frequency chips, including eleven. Ten of the LoRa radio frequency chips are respectively connected to the outputs of the four-channel power dividers and the second control subunit, and are used to demodulate the received signal according to a preset demodulation configuration and send the demodulated data to the second control subunit. The other LoRa radio frequency chip is respectively connected to the second control subunit and the input end of the adjustable attenuator, and is used to modulate the received data according to a preset modulation configuration to generate a transmission signal and send the transmission signal to the adjustable attenuator;

[0104] An adjustable attenuator, whose output end is connected to the radio frequency unit, and is used to adjust the intensity of the transmission signal sent by the LoRa radio frequency chip and send the adjusted transmission signal to the radio frequency unit;

[0105] A second control subunit, connected to the data transmission unit, and is used to store data in the local memory, read the data in the local memory and send it to the data transmission unit, and determine the transmission data and send it to the LoRa radio frequency chip.

[0106] Specifically, when the second baseband unit is in use, the radio frequency signals sent by the radio frequency unit are sent to the 10-channel LoRa radio frequency chips through the provided two-stage four-channel power divider. The 10-channel LoRa radio frequency chips respectively demodulate the received signals according to the preset demodulation configuration, and send the demodulated data to the second control subunit. The second control subunit stores the data in the local memory. When data needs to be sent out, the second control subunit determines the data to be sent and reads and sends it to the corresponding 1-channel LoRa radio frequency chip. This LoRa radio frequency chip modulates the data to generate a transmission signal, and sends the transmission signal to the adjustable attenuator. The adjustable attenuator adjusts the signal strength of the transmission signal so that the signal strength meets the input requirements of the radio frequency unit, and sends the adjusted transmission signal to the radio frequency unit. When data needs to be downloaded, the second control subunit determines the data to be downloaded and reads and sends it to the data transmission unit.

[0107] In an embodiment of the present invention, the second control subunit can also control and adjust the parameter configurations of multiple LoRa radio frequency chips according to given operations or instructions, so as to realize that the link parameters of each channel can be configured as required, without being limited by the radio frequency bandwidth constraints of traditional gateway chips.

[0108] In an embodiment of the present invention, the second control subunit uses a microprocessor. Among them, the microprocessor can select HC32L130F8UA, the four-channel power divider can select AD4PS-1+, the LoRa radio frequency chip uses the SX1278 radio frequency chip, and the adjustable attenuator can select PE43711S.

[0109] In an embodiment of the present invention, the four-channel power divider in the second baseband unit is connected to the four-channel power divider in the radio frequency unit through a radio frequency connector, and the adjustable attenuator in the second baseband unit is connected to the two-channel combiner in the radio frequency unit through a radio frequency connector. The radio frequency connector is, for example, an SMA connector.

[0110] Further, referring to Figure 2 , in an embodiment of the present invention, in order to facilitate the power supply of each unit and the transmission and interaction of signals and data, the multi-channel reconfigurable space-based Internet of Things signal forwarding device further includes a power supply and signal bus, which are respectively connected to the radio frequency unit, the data transmission unit, the first baseband unit and the second baseband unit, and are used for power supply and the transmission of other signals except radio frequency signals.

[0111] Among them, the power supply and signal bus is provided with a power supply interface, and the power supply interface is used to connect to an external power supply device. Corresponding to the above-mentioned specifically selected components, the power supply interface can access a DC power supply of 24±3V@4A with a ripple less than 100mV.

[0112] Further, in an embodiment of the present invention, for the convenience of connecting each unit, the radio frequency unit, the data transmission unit, the first baseband unit, and the second baseband unit are spliced using a stacked structure, and power and signals are interconnected between the units through connectors and buses.

[0113] Further, in an embodiment of the present invention, for the convenience of assembling and using the multi-channel reconfigurable space-based Internet of Things signal forwarding device and to ensure the safety of the device during use, the multi-channel reconfigurable space-based Internet of Things signal forwarding device further includes a housing. Each unit is installed in the housing. Three interface holes are opened on the housing, and the three interface holes are respectively aligned with the antenna interface on the radio frequency unit, the antenna interface on the data transmission unit, and the power interface on the power and signal bus. A plurality of lugs are provided on both sides of the bottom of the housing, and the plurality of lugs are fixedly connected to the side of the housing.

[0114] It should be noted that in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. In addition, in this article, "front", "rear", "left", "right", "upper", and "lower" are all referenced to the placement state shown in the drawings.

[0115] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-channel reconfigurable space-based Internet of Things signal forwarding device, characterized in that Including: A radio frequency unit, connected to the baseband unit, for receiving external wireless signals, amplifying the wireless signals and sending them to the baseband unit, and for amplifying the transmission signals sent by the baseband unit and sending them to the outside; A data transmission unit, connected to the baseband unit, for generating wireless signals according to the data sent by the baseband unit, sending the generated wireless signals to an external receiving terminal, and for receiving and processing external wireless signals; The baseband unit includes a first baseband unit and a second baseband unit. The first baseband unit is provided with a plurality of CHIRP radio frequency chips and a first control sub-unit. The plurality of CHIRP radio frequency chips are connected to the first control sub-unit. The CHIRP radio frequency chips are used for demodulating received signals according to a preset demodulation configuration, and sending the demodulated data to the first control sub-unit, and for modulating received data according to a preset modulation configuration to generate transmission signals, and sending the transmission signals to the radio frequency unit. The first control sub-unit is used for storing data in a local memory, reading the data in the local memory and sending it to the data transmission unit, and for determining transmission data and sending it to the CHIRP radio frequency chips; The second baseband unit is provided with a plurality of LoRa radio frequency chips and a second control sub-unit. The plurality of LoRa radio frequency chips are connected to the second control sub-unit. The LoRa radio frequency chips are used for demodulating received signals according to a preset demodulation configuration, and sending the demodulated data to the second control sub-unit, and for modulating received data according to a preset modulation configuration to generate transmission signals, and sending the transmission signals to the radio frequency unit. The second control sub-unit is used for storing data in a local memory, reading the data in the local memory and sending it to the data transmission unit, and for determining transmission data and sending it to the LoRa radio frequency chips.

2. The multi-channel reconfigurable space-based Internet of Things signal forwarding device according to claim 1, characterized in that, The radio frequency unit includes: a receiving channel, a transmitting channel, a radio frequency switch and a UHF band antenna; The radio frequency switch is respectively connected to the receiving channel, the transmitting channel and the UHF band antenna. The UHF band antenna is used for receiving and transmitting UHF band signals. The radio frequency switch is used for sending the received signals sent by the UHF band antenna to the receiving channel, and for sending the transmission signals sent by the transmitting channel to the UHF band antenna. The receiving channel is used for amplifying the received signals and sending the processed received signals to the baseband unit. The transmitting channel is used for receiving and amplifying the transmission signals sent by the baseband unit.

3. The multi-channel reconfigurable space-based Internet of Things signal forwarding device according to claim 2, wherein, The receiving channel includes: A limiter, whose input end is connected to the radio frequency switch and whose output end is connected to the input end of an adjustable attenuator; The adjustable attenuator, whose output end is connected to the input end of a first low-noise amplifier; The first low-noise amplifier, whose output end is connected to the input end of a first surface acoustic wave filter; The first surface acoustic wave filter, whose output end is connected to the input end of a second low-noise amplifier; The second low-noise amplifier, whose output end is connected to the input end of a second surface acoustic wave filter; The second surface acoustic wave filter has its output end connected to the input end of the four-channel power divider; The four-channel power divider has one output connected to the first baseband unit, one output connected to the second baseband unit, and one output connected to the input end of the detector; The detector has its output end connected to the input end of the AGC controller; The AGC controller has its output end connected to the adjustable attenuator, and is used to adjust the attenuation value of the adjustable attenuator according to the signal peak data collected by the detector.

4. The multi-channel reconfigurable space-based Internet of Things signal forwarding device according to claim 2, wherein, The transmitting channel includes: A two-channel combiner, with one input connected to the first baseband unit and one input connected to the second baseband unit; A third surface acoustic wave filter, with its input end connected to the output end of the two-channel combiner and its output end connected to the input end of the power amplifier; The power amplifier has its output end connected to the RF switch.

5. The multi-channel reconfigurable space-based Internet of Things signal forwarding device according to claim 2, wherein An LC filter is connected between the RF switch and the UHF band antenna, and the LC filter is used for out-of-band signal suppression processing.

6. The multi-channel reconfigurable space-based Internet of Things signal forwarding device according to claim 1, characterized in that, The data transmission unit includes: A microprocessor, which is respectively connected to the first baseband unit and the second baseband unit, and is used for data interaction with the first baseband unit and the second baseband unit; A core processor board, which is respectively connected to the microprocessor and the RF chip, and is used for data interaction with the microprocessor and the RF chip, and for controlling the RF chip; The RF chip is connected to the L-band antenna, and is used for generating a transmission signal and sending it to the L-band antenna, and for processing the received signal sent by the L-band antenna; The L-band antenna is used for transmitting and receiving L-band signals.

7. The multi-channel reconfigurable space-based Internet of Things signal forwarding device according to claim 1, characterized in that, The first baseband unit includes: There are three four-channel power dividers. The input end of one of the four-channel power dividers is connected to the RF unit. The four outputs are respectively connected to the input ends of the other two four-channel power dividers and two CHIRP RF chips. The four outputs of the other two four-channel power dividers are each connected to four CHIRP RF chips; There are eleven CHIRP RF chips. Ten of the CHIRP RF chips are respectively connected to the outputs of the four-channel power divider and the first control subunit, and are used for demodulating the received signal according to a preset demodulation configuration and sending the demodulated data to the first control subunit. The other CHIRP RF chip is respectively connected to the first control subunit and the input end of the adjustable attenuator, and is used for modulating the received data according to a preset modulation configuration to generate a transmission signal and sending the transmission signal to the adjustable attenuator; The adjustable attenuator has its output end connected to the RF unit, and is used for adjusting the intensity of the transmission signal sent by the CHIRP RF chip and sending the adjusted transmission signal to the RF unit; The first control subunit is connected to the data transmission unit and is configured to store data in the local memory, read the data in the local memory and send it to the data transmission unit, and determine and send the transmission data to the CHIRP radio frequency chip.

8. The multi-channel reconfigurable space-based Internet of Things signal forwarding device according to claim 1, characterized in that The second baseband unit includes: Three four-channel power dividers, wherein the input end of one of the four-channel power dividers is connected to the radio frequency unit, and the four outputs are respectively connected to the input ends of the other two four-channel power dividers and two LoRa radio frequency chips, and the four outputs of the other two four-channel power dividers are each connected to four LoRa radio frequency chips; Eleven LoRa radio frequency chips, wherein ten of the LoRa radio frequency chips are respectively connected to the outputs of the four-channel power dividers and the second control subunit, and are configured to demodulate the received signal according to a preset demodulation configuration and send the demodulated data to the second control subunit, and the other LoRa radio frequency chip is respectively connected to the second control subunit and the input end of the adjustable attenuator, and is configured to modulate the received data according to a preset modulation configuration to generate a transmission signal and send the transmission signal to the adjustable attenuator; The adjustable attenuator, whose output end is connected to the radio frequency unit, is configured to adjust the intensity of the transmission signal sent by the LoRa radio frequency chip and send the adjusted transmission signal to the radio frequency unit; The second control subunit is connected to the data transmission unit and is configured to store data in the local memory, read the data in the local memory and send it to the data transmission unit, and determine and send the transmission data to the LoRa radio frequency chip.

9. The multi-channel reconfigurable space-based Internet of Things signal forwarding device according to claim 1, characterized in that, It further includes a power supply and signal bus, which is respectively connected to the radio frequency unit, the data transmission unit, the first baseband unit and the second baseband unit, and is configured to supply power and transmit other signals except radio frequency signals.

10. The multi-channel reconfigurable space-based Internet of Things signal forwarding device according to any one of claims 1-9, characterized in that, The radio frequency unit, the data transmission unit, the first baseband unit and the second baseband unit are spliced using a stacked structure.

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