System, satellite, inter-satellite laser communication method and storage medium

Abstract

The invention discloses a system, a satellite, an inter-satellite laser communication method and a storage medium, which are used for solving the technical problem that the existing inter-satellite communication is difficult to meet the requirement of large-scale constellation satellite communication networking on the basis of being compatible with a traditional space link, and a transmitting system comprises a baseband signal processing module, a laser modulation module and a laser transmitting module, wherein the laser modulation module is connected between the baseband signal processing module and the laser emission module; the baseband signal processing module is used for supporting channel coding of signals corresponding to at least two optical communication protocols to obtain corresponding channel signals; the laser modulation module is used for supporting modulation of channel signals corresponding to the at least two optical communication protocols into laser signals with at least two wavelengths; and the laser emission module is used for supporting synthesis of the laser signals corresponding to the at least two wavelengths into laser beams for emission.

Description

Technical Field

[0001] The present invention relates to the field of satellite communications, and in particular to a system, a satellite, a method for inter-satellite laser communications and a storage medium. Background Art

[0002] Satellite Internet has become the focus of development in the global information and communication field. Multiple international constellations have been deployed on a large scale, especially low-orbit satellite constellations, which have developed rapidly.

[0003] The existing space laser communication physical layer communication technology solutions can mainly refer to the previous data system standards for aerospace space information exchange for space data communication, such as adapting to the Consultative Committee for Space Data Systems (CCSDS) communication standards. The CCSDS data link sublayer defines the method of transmitting data using data packets (such as data frames) on space links, which has the advantages of flexible frame structure and support for customized design.

[0004] Although CCSDS is the industry standard for space links and has a good application foundation in the aerospace industry, and is suitable for application in a certain limited node scale mission scenario, future large-scale constellation networking will need to be oriented towards multi-node, multi-service, high-traffic and other communication scenarios. Therefore, considering the future construction of space optical networks, the integration and development of satellite-ground systems, forward system compatibility and other highly complex scenarios, it is difficult to meet the requirements of large-scale constellation satellite communication networking.

[0005] In view of this, how to conduct inter-satellite communications on the basis of compatibility with traditional space links to meet the requirements of large-scale constellation satellite communication networking has become a technical problem that needs to be solved urgently. Summary of the invention

[0006] The present invention provides a system, a satellite, a method for inter-satellite laser communication and a storage medium, so as to solve the technical problem in the prior art that the existing inter-satellite communication is difficult to meet the requirements of large-scale constellation satellite communication networking on the basis of compatibility with traditional space links.

[0007] In the first aspect, in order to solve the above technical problems, a technical solution of a transmitting system provided by an embodiment of the present invention is as follows:

[0008] A baseband signal processing module, a laser modulation module, and a laser emission module; wherein the laser modulation module is connected between the baseband signal processing module and the laser emission module;

[0009] The baseband signal processing module is used to support channel coding of signals corresponding to at least two optical communication protocols to obtain corresponding channel signals;

[0010] The laser modulation module is used to support modulation of the channel signals corresponding to the at least two optical communication protocols into laser signals of at least two wavelengths;

[0011] The laser emission module is used to support the synthesis of laser signals corresponding to the at least two wavelengths into a laser beam for emission.

[0012] In one implementation, the baseband signal processing module includes:

[0013] A signal shunting unit, used to shunt the signals corresponding to the at least two optical communication protocols according to the signal identifier carried by the signal or the Ethernet logical interface from which the signal comes; wherein the signal identifier is used to identify the optical communication protocol adapted by the signal, and the Ethernet logical interface is used to transmit the signal corresponding to the corresponding optical communication protocol;

[0014] At least two baseband signal processing units correspond one-to-one to the at least two optical communication protocols, and the baseband signal processing units are connected between the signal diversion unit and the laser modulation module; the baseband signal processing unit is used to perform the channel coding on the signal received from the signal diversion unit according to the optical communication protocol corresponding to the channel processing unit to obtain the corresponding channel signal.

[0015] In one implementation, the laser modulation module includes:

[0016] At least two laser modulation submodules, corresponding one to one with the at least two baseband signal processing units; the laser modulation submodules include a laser and a laser modulation unit;

[0017] A laser, used to provide a seed light source of one wavelength;

[0018] A laser modulation unit is connected between the corresponding baseband signal processing unit and the laser emission module, and the laser modulation unit is also connected to the laser; the laser modulation unit is used to modulate the seed light source into a corresponding laser signal according to the received channel signal, and send it to the laser emission module.

[0019] In one implementation, the laser emission module includes:

[0020] The wavelength division multiplexer is used to synthesize the laser signals received from the at least two laser modulation submodules into the laser beam for emission.

[0021] In a second aspect, an embodiment of the present invention further provides a receiving system, including:

[0022] A laser receiving module, a signal detection module, and a baseband signal processing module; the signal detection module is connected between the laser receiving module and the baseband signal processing module;

[0023] The laser receiving module is used to support decomposing laser signals corresponding to at least two wavelengths from the received laser beam;

[0024] The signal detection module is used to support the conversion of laser signals corresponding to the at least two wavelengths into channel signals corresponding to at least two optical communication protocols.

[0025] The baseband signal processing module is used to support channel decoding of channel signals corresponding to the at least two optical communication protocols to obtain signals corresponding to the at least two optical communication protocols.

[0026] In one implementation, the laser receiving module includes:

[0027] The optical coupler is used to support receiving the laser beam;

[0028] The wave demultiplexer is connected between the optical coupler and the signal detection module. The wave demultiplexer is used to support decomposing the laser signals of at least two wavelengths from the laser beam and transmit them to the signal detection module through at least two paths corresponding to the at least two wavelengths.

[0029] In one implementation, the signal detection module includes:

[0030] At least two signal detection units correspond one to one with at least two paths; the signal detection unit is used to receive a laser signal corresponding to a wavelength, and perform photoelectric conversion on the laser signal of the wavelength to obtain a corresponding channel signal.

[0031] In one implementation, the baseband signal processing module includes:

[0032] At least two baseband signal processing units are connected to the at least two signal detection units in a one-to-one correspondence, and the baseband signal processing units are used to perform the channel decoding on the received channel signal according to the optical communication protocol corresponding to the baseband processing units to obtain a signal corresponding to the optical communication protocol;

[0033] A signal converging unit is connected to the output ends of the at least two baseband signal processing units, and the signal converging unit is used to support the converging and sending of the signals output by the at least two baseband signal processing units.

[0034] In a third aspect, an embodiment of the present invention further provides a transceiver system, including:

[0035] The launch system as described in the first aspect;

[0036] The receiving system as described in the second aspect;

[0037] A network interface and an optical interface, the transmitting system and the receiving system are both coupled between the network interface and the optical interface;

[0038] An optical antenna is connected to the optical interface.

[0039] In one implementation, the transceiver system further includes:

[0040] Control systems and servo turntables;

[0041] The servo turntable is used to control the pointing direction of the optical antenna to aim, capture and track the satellite communication link corresponding to the laser beam;

[0042] The control system is used to control the baseband signal processing module and the laser modulation module, the optical antenna and the servo turntable to work in coordination.

[0043] In a fourth aspect, an embodiment of the present invention further provides a satellite, comprising the transceiver system as described in the first aspect.

[0044] In a fifth aspect, an embodiment of the present invention further provides a method for inter-satellite laser communication, which is applied to the transmitting system described in the first aspect, comprising:

[0045] Channel coding is performed on signals corresponding to at least one optical communication protocol received simultaneously to obtain channel signals corresponding to the signals;

[0046] Modulating a channel signal corresponding to the at least one optical communication protocol into a laser signal of at least one wavelength;

[0047] The laser signals of the at least one wavelength are combined into a laser beam for transmission.

[0048] In a sixth aspect, an embodiment of the present invention further provides a method for inter-satellite laser communication, which is applied to the receiving system as described in the second aspect, comprising:

[0049] Decomposing a laser signal of at least one wavelength from the received laser beam;

[0050] Converting the laser signal of the at least one wavelength into a channel signal corresponding to at least one communication protocol;

[0051] According to each optical communication protocol of the at least one optical communication protocol, channel decoding is performed on a corresponding channel signal to obtain a signal of the corresponding optical communication protocol;

[0052] The signals corresponding to the at least one optical communication protocol are combined and then sent.

[0053] In a seventh aspect, an embodiment of the present invention further provides a satellite communication system, including:

[0054] at least one processor, and

[0055] a memory coupled to the at least one processor;

[0056] The memory stores instructions that can be executed by the at least one processor, and the at least one processor executes the method as described in the fifth or sixth aspect above by executing the instructions stored in the memory.

[0057] In an eighth aspect, an embodiment of the present invention further provides a readable storage medium, including:

[0058] Memory,

[0059] The memory is used to store instructions. When the instructions are executed by the processor, the device including the readable storage medium completes the method described in the fifth or sixth aspect above.

[0060] Through the technical solutions in one or more of the above embodiments of the embodiments of the present invention, the embodiments of the present invention have at least the following technical effects:

[0061] In the embodiment provided by the present invention, by allowing the baseband signal processing module to support channel coding of signals corresponding to at least two optical communication protocols to obtain corresponding channel signals, and allowing the laser modulation module to support modulating the channel signals corresponding to at least two optical communication protocols into laser signals of at least two wavelengths, and allowing the laser transmission module to support synthesizing the laser signals of at least two wavelengths into a laser beam for transmission, the transmission system can simultaneously transmit laser signals corresponding to different optical communication protocols in the form of multi-wavelength wavelength division multiplexing, thereby meeting the inter-satellite communication requirements of current industry standards and large-scale constellation satellite communication networking requirements under future development. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1 A schematic diagram of the structure of a transmitting system provided by an embodiment of the present invention;

[0063] Figure 2 A schematic diagram of the structure of a baseband signal processing module provided by an embodiment of the present invention;

[0064] Figure 3 A laser modulation module provided by an embodiment of the present invention;

[0065] Figure 4 A schematic diagram of the structure of a laser emission module provided by an embodiment of the present invention;

[0066] Figure 5 A schematic diagram of the structure of another laser emission module provided by an embodiment of the present invention;

[0067] Figure 6A schematic diagram of the structure of a receiving system provided by an embodiment of the present invention;

[0068] Figure 7 A schematic diagram of the structure of a laser receiving module provided by an embodiment of the present invention;

[0069] Figure 8 A schematic diagram of the structure of another laser receiving module provided by an embodiment of the present invention;

[0070] Fig. 9 A schematic diagram of the structure of a signal detection module provided by an embodiment of the present invention;

[0071] Fig.10 A schematic diagram of the structure of another baseband signal processing module provided by an embodiment of the present invention;

[0072] Fig.11 A schematic diagram of the structure of a transceiver system provided in an embodiment of the present invention;

[0073] Fig.12 A schematic diagram of the structure of another transceiver system provided by an embodiment of the present invention;

[0074] Fig.13 A schematic diagram of inter-satellite communication in a satellite network provided by an embodiment of the present invention;

[0075] Fig.14 A flow chart of an inter-satellite laser communication method on the transmitting system side provided by an embodiment of the present invention;

[0076] Fig.15 A flowchart of an inter-satellite laser communication method on the receiving system side provided in an embodiment of the present invention.

[0077] Reference numerals:

[0078] Baseband signal processing module 11, laser modulation module 21, laser emission module 22, signal shunting unit 111, baseband signal processing unit 112, laser modulation submodule 21 laser 2111, laser modulation unit 2112, optical antenna 3, wavelength division multiplexer 221, laser receiving module 31, signal detection module 32, optical fiber coupler 311, wavelength demultiplexer 312, signal detection unit 321;

[0079] Network interface P1, optical interface P2, transmitter 1, receiver 2, control system 4, servo turntable 5. DETAILED DESCRIPTION

[0080] The embodiments of the present invention provide a system, a satellite, a method of inter-satellite laser communication and a storage medium to solve the technical problem in the prior art that the existing inter-satellite communication is difficult to meet the requirements of large-scale constellation satellite communication networking on the basis of compatibility with traditional space links.

[0081] In order to better understand the above technical scheme, the technical scheme of the present invention is described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical scheme of the present invention, rather than limitations on the technical scheme of the present invention. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other.

[0082] Please refer to Figure 1 The embodiment of the present invention provides a transmitting system, the transmitting system comprising:

[0083] A baseband signal processing module 11, a laser modulation module 21, and a laser emission module 22 connected in sequence;

[0084] The baseband signal processing module 11 is used to support channel coding of signals corresponding to at least two optical communication protocols to obtain corresponding channel signals;

[0085] The above signal may be a signal in the Ethernet interface signal sent by the upper layer network to the baseband signal processing module 11 .

[0086] Optical communication protocols include CCSDS protocol, Optical Transport Network (OTN) protocol and other optical communication protocols. Among them, OTN protocol can be based on G.709. The advantages of OTN protocol include: high-efficiency carrying capacity, high-performance forward error correction (FEC) capability, rich overhead & maintenance management mechanism, flexible data encapsulation mapping mechanism, etc., which can support the long-term continuous evolution and forward compatibility of large-scale networks. In addition, from the perspective of evolution route, under the condition of ensuring communication performance, the evolution direction of high-speed evolution is in digital coherence, which requires the reuse of ground industry chain to reduce costs and obtain high integration capabilities.

[0087] For example, if the baseband signal processing module 11 supports the CCSDS protocol and the OTN protocol, at time 1, the baseband signal processing module 11 receives an Ethernet interface signal 1 sent by the upper network, and the Ethernet interface signal 1 includes a signal 1 adapted to the CCSDS protocol. The baseband signal processing module 11 can obtain the signal 1 from the Ethernet interface signal 1, and perform channel coding on the signal 1 based on the CCSDS protocol to obtain a corresponding channel signal; at time 2, the baseband signal processing module 11 receives an Ethernet interface signal 2 sent by the upper network, and the Ethernet interface signal 2 includes a signal 2 adapted to the OTN protocol. The baseband signal processing module 1 1 can obtain signal 2 from Ethernet interface signal 2, and channel encode signal 2 based on the OTN protocol to obtain a corresponding channel signal; at time 3, the baseband signal processing module 11 receives the Ethernet interface signal 3 sent by the upper layer network, the Ethernet interface signal 3 includes signal 3 adapted to the CCSDS protocol and signal 4 adapted to the OTN protocol, the baseband signal processing module 11 can obtain signal 3 and signal 4 from the Ethernet interface signal 3, and channel encode signal 3 based on the CCSDS protocol to obtain a corresponding channel signal, and channel encode signal 4 based on the OTN protocol to obtain a corresponding channel signal.

[0088] The baseband signal processing module 11 has the baseband processing capability of the signals adapted to different optical communication protocols, including channel coding, scrambling, framing, etc. (standard processing flow of the corresponding optical communication protocol). If the optical communication protocol is the CCSDS protocol, the frame format adapted to the CCSDS protocol includes frame header structure contents such as spacecraft identification, virtual channel number, main channel frame count, virtual channel frame count, etc., and the channel coding can adopt the Reed-solomon codes (RS) or low-density parity check codes (LDPC) recommended by the CCSDS standard protocol; the frame format adapted to the OTN protocol system includes the optical channel payload unit (OPUk) overhead, the optical channel data unit (ODUk) overhead, and the optical channel transport unit (OTUk) overhead, etc., and the channel coding can adopt the RS coding maturely applied in the ground OTN system, etc.

[0089] The laser modulation module 21 is used to support modulation of channel signals corresponding to at least two optical communication protocols into laser signals of at least two wavelengths;

[0090] The laser emission module 22 is used to support the synthesis of laser signals corresponding to at least two wavelengths into a laser beam for emission.

[0091] For example, take the Ethernet interface signal as an example, which is composed of a signal adapted to the CCSDS protocol and a signal adapted to the OTN protocol, and assume that the CCSDS protocol corresponds to the first wavelength and the OTN protocol corresponds to the second wavelength; after the baseband signal processing module 11 obtains the signal adapted to the CCSDS protocol and the signal adapted to the OTN protocol from the Ethernet interface signal, it performs channel coding on the signal adapted to the CCSDS protocol based on the CCSDS protocol to obtain channel signal 1, and performs channel coding on the signal of the video OTN protocol based on the OTN protocol to obtain channel signal 2, and the baseband signal processing module 11 sends the channel signal 1 and the channel signal 2 to the laser modulation module 21; after receiving the channel signal 1, the laser modulation module 21 modulates it into a laser signal 1 with a first wavelength, and after receiving the channel signal 2, the laser modulation module 21 modulates it into a laser signal 2 with a second wavelength, and the laser modulation module 21 sends the laser signal 1 and the laser signal 2 to the laser emission module 22; the laser emission module 22 combines the laser 1 and the laser 2 into a laser beam, and emits it through the optical antenna 3.

[0092] In the above scheme, if the Ethernet interface signal is composed solely of a signal adapted to the CCSDS protocol, the baseband signal processing module 11 only needs to perform channel coding on the signal adapted to the CCSDS protocol according to the CCSDS protocol after obtaining the signal adapted to the CCSDS protocol, so as to obtain a channel signal using the CCSDS protocol, and then modulate the channel signal using the CCSDS protocol into a laser signal having a first wavelength through the laser modulation module 21, and the laser signal having the first wavelength constitutes a laser beam, and the laser beam is emitted through the optical antenna 3; when the Ethernet interface signal is composed solely of a signal adapted to the OTN protocol, the baseband signal processing module 11 only needs to perform channel coding on the signal adapted to the OTN protocol according to the OTN protocol after obtaining the signal adapted to the OTN protocol, so as to obtain a channel signal using the OTN protocol, and then modulate the channel signal using the OTN protocol into a laser signal having a second wavelength through the laser modulation module 21, and the laser signal having the second wavelength constitutes a laser beam, and the laser beam is emitted through the optical antenna 3.

[0093] In the embodiment provided by the present invention, by allowing the baseband signal processing module 11 to support channel coding of signals corresponding to at least two optical communication protocols to obtain corresponding channel signals, and allowing the laser modulation module 21 to support modulating the channel signals corresponding to at least two optical communication protocols into laser signals of at least two wavelengths, and allowing the laser transmitting module 22 to support synthesizing the laser signals of at least two wavelengths into a laser beam for transmission, the transmitting system can simultaneously transmit laser signals corresponding to different optical communication protocols in the form of multi-wavelength wavelength division multiplexing, thereby meeting the inter-satellite communication requirements of current industry standards and large-scale constellation satellite communication networking requirements under future development.

[0094] See also Figure 2 A schematic diagram of the structure of a baseband signal processing module provided in an embodiment of the present invention, the baseband signal processing module 11 includes:

[0095] The signal shunting unit 111 is used to shunt signals corresponding to at least two optical communication protocols according to the signal identifier carried by the signal or the Ethernet logical interface from which the signal comes; wherein the signal identifier is used to identify the optical communication protocol adapted by the signal, and the Ethernet logical interface is used to transmit the signal corresponding to the corresponding optical communication protocol;

[0096] At least two baseband signal processing units 112 correspond one-to-one to at least two optical communication protocols. The baseband signal processing unit 112 is connected between the signal diversion unit 111 and the laser modulation module 21; the baseband signal processing unit 112 is used to perform channel coding on the signal received from the signal diversion unit 111 according to the optical communication protocol corresponding to the channel processing unit 112 to obtain a corresponding channel signal.

[0097] Each baseband signal processing unit 112 has a baseband processing capability corresponding to a corresponding optical communication protocol.

[0098] For example, the Ethernet interface signal includes a signal adapted to the CCSDS protocol and a signal adapted to the OTN protocol. The signal diversion unit 111 can divert the signal adapted to the CCSDS protocol and the signal adapted to the OTN protocol from the Ethernet interface signal according to the signal identifier (CCSDS identifier or OTN identifier) ​​carried in the physical layer corresponding to the signal; if different optical communication protocols are transmitted using different Ethernet logical interfaces (such as VLAN interfaces), the signal diversion unit 111 will divert the signal adapted to the CCSDS protocol and the signal adapted to the OTN protocol according to the Ethernet logical interface from which the signal comes.

[0099] After the signal adapted to the CCSDS protocol and the signal adapted to the OTN protocol are separated, the signal adapted to the CCSDS protocol is subjected to channel coding corresponding to the CCSDS protocol by the baseband signal processing unit 112 corresponding to the CCSDS to obtain a channel signal using the CCSDS protocol; the signal adapted to the OTN protocol is subjected to channel coding corresponding to the OTN protocol by the baseband signal processing unit 112 corresponding to the OTN to obtain a channel signal using the OTN protocol.

[0100] In the embodiment provided by the present invention, a signal diversion unit 111 and at least two baseband signal processing units 112 are provided for the baseband signal processing module 11, so that the signal diversion unit 111 can divert signals of at least two optical communication protocols from the Ethernet interface signal according to the signal identifier of the adapted optical communication protocol carried by the signal or the Ethernet logical interface from which the signal comes, and through at least two baseband signal processing units 112 corresponding one-to-one to at least two optical communication protocols, the baseband signal processing unit 112 performs channel encoding on the signal received from the signal diversion unit according to the corresponding optical communication protocol to obtain the corresponding channel signal, so that the baseband signal processing module 11 can support the simultaneous processing of signals corresponding to at least one optical communication protocol.

[0101] See also Figure 3 A laser modulation module is provided in an embodiment of the present invention. The laser modulation module 21 includes:

[0102] At least two laser modulation submodules 211 correspond to at least two baseband signal processing units 112 one by one; the laser modulation submodule 211 includes a laser 2111 and a laser modulation unit 2112;

[0103] The laser 2111 is used to provide a seed light source with a wavelength; wherein different laser modulation submodules 211 correspond to different wavelengths of the seed light sources provided by the lasers 2111;

[0104] The laser modulation unit 2112 is connected between the corresponding baseband signal processing unit 112 and the laser emission module 22, and the laser modulation unit 2112 is also connected to the laser 2111; the laser modulation unit 2112 is used to modulate the seed light source into a corresponding laser signal according to the received channel signal, and send it to the laser emission module 22.

[0105] For example, a laser modulation unit 2112 in the laser modulation module 21 is connected to the baseband signal processing unit 112 corresponding to the CCSDS protocol. The wavelength of the seed light source provided by the laser 2111 connected to this laser modulation unit 2112 is the first wavelength. This laser modulation unit 2112 performs coherent or incoherent signal modulation on the received channel signal (using the CCSDS protocol) according to the seed light source of the first wavelength to obtain a laser signal with a wavelength of the first wavelength.

[0106] For another example, another laser modulation unit 2112 in the laser modulation module 21 is connected to the baseband signal processing unit 112 corresponding to the OTN protocol. The wavelength of the seed light source provided by the laser 2111 connected to this laser modulation unit 2112 is the second wavelength. This laser modulation unit 2112 performs coherent or incoherent modulation on the received channel signal (using the OTN protocol) according to the seed light source of the second wavelength to obtain a laser signal with a wavelength of the second wavelength.

[0107] In the embodiment provided by the present invention, by setting at least two laser modulation sub-modules 211 corresponding to at least two baseband signal processing units 112 in a one-to-one manner in the laser modulation module 21, and allowing the laser modulation sub-module 211 to include a laser 2111 and a laser modulation unit 2112, allowing the laser 2111 to provide a seed light source of a wavelength for the corresponding laser modulation unit 2112, and allowing different laser modulation units 2112 to modulate the seed light source of the corresponding wavelength into a laser signal of the corresponding wavelength according to the received channel signal, so that the laser modulation unit 212 supports modulating channel signals using different optical communication protocols into laser signals with different wavelengths, so as to facilitate simultaneous transmission.

[0108] See also Figure 4 A schematic diagram of the structure of a laser emission module provided in an embodiment of the present invention, the laser emission module 22 includes:

[0109] The wavelength division multiplexer 221 is used to synthesize the laser signals received from at least two laser modulation submodules into a laser beam for emission.

[0110] See also Figure 5 A schematic diagram of the structure of another laser emission module provided in an embodiment of the present invention, wherein the laser emission module 22 further includes:

[0111] The optical amplifier 222 is connected between the wavelength division multiplexer 221 and the optical antenna 3. The optical amplifier 222 is used to amplify the laser beam emitted by the wavelength division multiplexer 221 and then send it to the optical antenna 3 for spatial transmission.

[0112] For example, the wavelength division multiplexer 221 can synthesize the laser signals of at least two wavelengths received from at least two laser modulation submodules into one laser beam for transmission through the optical antenna. After the wavelength division multiplexer 221 synthesizes the laser signals of at least two wavelengths into one laser beam, it can also send the laser beam to the optical amplifier 222, which amplifies the laser beam and then transmits it spatially through the optical antenna 3.

[0113] In the embodiment provided by the present invention, by allowing the wavelength division multiplexer 221 to synthesize laser signals of at least two wavelengths into a first laser beam for emission, it is possible to simultaneously emit first laser signals of different wavelengths, improve channel utilization, and enable the emission system to be compatible with the differentiated service capabilities of different intersatellite laser link systems (optical communication protocols). An optical amplifier 222 is arranged after the wavelength division multiplexer 221, and the optical amplifier 222 amplifies the laser beam synthesized by the wavelength division multiplexer before emission, which can improve the transmission distance and stability of the laser beam.

[0114] Based on the same inventive concept, see Figure 6A schematic diagram of a receiving system provided in an embodiment of the present invention, the receiving system comprising:

[0115] The laser receiving module 31, the signal detection module 32, and the baseband signal processing module 11 are connected in sequence; the signal detection module 32 is connected between the laser receiving module 31 and the baseband signal processing module 11;

[0116] The laser receiving module 31 is used to support decomposing laser signals corresponding to at least two wavelengths from the received laser beam;

[0117] The signal detection module 32 is used to support the conversion of laser signals corresponding to at least two wavelengths into channel signals corresponding to at least two optical communication protocols; wherein different channel signals use different optical communication protocols;

[0118] The baseband signal processing module 11 is used to support channel decoding of channel signals corresponding to at least two optical communication protocols to obtain signals corresponding to at least two optical communication protocols, wherein the signals corresponding to at least two optical communication protocols can be combined into an Ethernet interface signal and sent to an upper layer network.

[0119] The laser beam may be composed of a laser signal corresponding to one wavelength, or may be composed of laser beams of two wavelengths, or may be composed of laser beams of more wavelengths. Laser signals of different wavelengths correspond to different optical communication protocols. Optical communication protocols include CCSDS protocol, OTN protocol, etc.

[0120] For example, the laser receiving module 31 supports decomposing laser signals corresponding to two wavelengths from the received laser beam. Therefore, when the laser beam contains only a laser signal of one wavelength, the laser signal of this wavelength can also be obtained; when the laser beam contains laser signals of two wavelengths, the laser receiving module 31 can also decompose the laser signals of these two wavelengths from the laser beam.

[0121] For another example, the laser receiving module 31 supports decomposing laser signals corresponding to three wavelengths from the received laser beam. Therefore, when the laser beam contains only a laser signal of one wavelength, the laser signal of this wavelength can also be obtained; when the laser beam contains laser signals of two wavelengths, the laser receiving module 31 can also decompose the laser signals of these two wavelengths from the laser beam; when the laser beam contains laser signals of three wavelengths, the laser receiving module 31 can also decompose the laser signals of these three wavelengths from the laser beam.

[0122] The laser receiving module 31 sends the decomposed laser signal to the signal detection module 32. The signal detection module 32 performs photoelectric conversion on the laser signal corresponding to each wavelength to obtain the channel signal corresponding to the optical communication protocol. Then, the baseband signal processing module 11 performs channel decoding on the corresponding channel signal according to the optical communication protocol used by each channel signal to obtain the signal corresponding to the optical communication protocol. After that, the signals corresponding to all optical communication protocols can be merged into an Ethernet interface signal and sent to the high-level network.

[0123] It should be noted that the baseband signal processing module 11 in the receiving system is the same entity as the baseband signal processing module 11 in the aforementioned transmitting system. In order to facilitate understanding, the functions of the baseband signal processing module 11 in the corresponding system are described in the receiving system and the transmitting system respectively. That is to say, the baseband signal processing module 11 actually includes the functions described in the receiving system and the transmitting system, and the receiving system and the transmitting system only use part of the functions in the baseband signal processing module 11.

[0124] In the embodiment provided by the present invention, by providing a laser receiving module 31, a signal detection module 32, and a baseband signal processing module 11 in the receiving system, and allowing the laser receiving module 31 to support decomposing laser signals corresponding to at least two wavelengths from the received laser beam; allowing the signal detection module 32 to support converting the laser signals corresponding to at least two wavelengths into channel signals corresponding to at least two optical communication protocols, and then allowing the baseband signal processing module 11 to support channel decoding of the channel signals corresponding to at least two optical communication protocols, so as to obtain signals corresponding to at least two optical communication protocols. Thus, the receiving system can identify the laser beam composed of laser signals of at least two wavelengths, and convert the laser signals of at least two wavelengths into channel signals corresponding to at least two optical communication protocols, and then parse the channel signals corresponding to at least two optical communication protocols into signals that can be recognized by the upper network, so that the receiving system can receive laser signals corresponding to different optical communication protocols in the form of wavelength division multiplexing of multiple wavelengths, so as to meet the inter-satellite communication under the current industry standards and the requirements of large-scale constellation satellite communication networking under future development, and make the receiving system compatible with the differentiated service capabilities of different inter-satellite laser link systems.

[0125] See also Figure 7 A schematic diagram of the structure of a laser receiving module provided in an embodiment of the present invention, the laser receiving module 31 comprises:

[0126] The optical coupler 311 is used to support receiving the laser beam; the optical coupler 311 receives the laser beam through the optical antenna 3, and the laser beam may contain a laser signal of one wavelength, may contain laser signals of two wavelengths, or may contain laser signals of more wavelengths.

[0127] The wave demultiplexer 312 is connected between the optical coupler 311 and the signal detection module. The wave demultiplexer 312 is used to support the decomposition of at least two wavelengths of laser signals from the laser beam, and transmit them to the signal detection module 32 through at least two paths corresponding to the at least two wavelengths; wherein different transmission paths correspond to different optical communication protocols.

[0128] For example, the laser beam includes a laser signal with a first wavelength and a laser signal with a second wavelength. After the optical coupler 311 receives the above laser beam through the optical antenna 3, the above laser beam is sent to the wave demultiplexer 312. The wave demultiplexer 312 decomposes the laser signal of the first wavelength and the laser signal of the second wavelength from the laser beam, and transmits them to the signal detection module 32 through different transmission paths; the wave demultiplexer 312 transmits the laser signals of different wavelengths obtained by decomposing the laser beam to the signal detection module 32 through different paths, so that the signal detection module 32 can convert the laser signals of different wavelengths into channel signals using the corresponding optical communication protocol, thereby facilitating the baseband signal processing module 11 to perform channel decoding on the channel signals using different optical communication protocols.

[0129] See also Figure 8 A schematic diagram of the structure of another laser receiving module provided by an embodiment of the present invention, wherein the laser receiving module further comprises:

[0130] The optical amplifier 313 is connected between the optical coupler 311 and the wave demultiplexer 312 . The optical amplifier 312 is used to amplify the laser beam and then send it to the wave demultiplexer 312 .

[0131] For example, the laser beam includes a laser signal with a first wavelength and a laser signal with a second wavelength. After the optical coupler 311 receives the above laser beam through the optical antenna 3, the above laser beam is sent to the optical amplifier 313. The optical amplifier 313 amplifies the laser beam and sends the amplified laser beam to the wave demultiplexer. The wave demultiplexer 312 decomposes the laser signal of the first wavelength and the laser signal of the second wavelength from the amplified laser beam, and transmits them to the signal detection module 32 through different transmission paths. Since the optical amplifier 313 amplifies the laser beam and then sends it to the wave demultiplexer 312 for decomposition, even if the laser beam received by the optical coupler 311 is relatively weak, the wave demultiplexer 312 can decompose laser signals of different wavelengths from the amplified laser beam, and then transmit the obtained laser signals of different wavelengths to the signal detection module 32 through different paths, so that the signal detection module 32 can convert laser signals of different wavelengths into channel signals using corresponding optical communication protocols, thereby facilitating the baseband signal processing module 11 to perform channel decoding on channel signals using different optical communication protocols.

[0132] In the embodiment provided by the present invention, by arranging the optical amplifier 313 between the optical coupler 311 and the wave demultiplexer 312, the wave demultiplexer 312 can decompose the laser signal from the laser beam with low transmission power, thereby improving the stability of laser communication.

[0133] See also Fig. 9 A schematic diagram of the structure of a signal detection module provided in an embodiment of the present invention, the signal detection module 32 includes:

[0134] At least two signal detection units 321 correspond to at least two paths one by one; the signal detection unit 321 is used to receive a laser signal corresponding to a wavelength, and perform photoelectric conversion on the received laser signal of a wavelength to obtain a corresponding channel signal.

[0135] For example, if the baseband signal processing module 11 supports channel decoding of channel signals corresponding to two optical communication protocols (OTN protocol and CCSDS protocol), the signal detection module 32 has two signal detection units 321 (a signal detection unit 321 for detecting a first wavelength and a signal detection unit 321 for detecting a second wavelength, wherein the first wavelength corresponds to the OTN protocol and the second wavelength corresponds to the CCSDS protocol), and the wavelength demultiplexer 312 will transmit laser signals of corresponding wavelengths to the two signal detection units 321 through two paths respectively.

[0136] Assume that: the laser beam includes a laser signal of one wavelength (first wavelength), the wavelength demultiplexer 312 decomposes the laser signal of the first wavelength from the laser beam, and transmits the laser signal of the first wavelength to the signal detection unit 321 for detecting the first wavelength through a path corresponding to the first wavelength, and the signal detection unit 321 for detecting the first wavelength performs photoelectric conversion on the detected laser signal of the first wavelength to obtain a channel signal using the OTN protocol. When the laser beam only includes a laser signal of one wavelength, the signal detection module 32 only uses the corresponding signal detection unit 321 to work, and the remaining signal detection units 321 do not work.

[0137] It is also assumed that: the laser beam includes laser signals of the above two wavelengths, the wavelength demultiplexer 312 decomposes the laser signal of the first wavelength and the laser signal of the second wavelength from the laser beam, and transmits the laser signal of the first wavelength to the signal detection unit 321 for detecting the first wavelength through a path corresponding to the first wavelength, and transmits the laser signal of the second wavelength to the signal detection unit 321 for detecting the second wavelength through a path corresponding to the second wavelength; the signal detection unit 321 for detecting the first wavelength performs photoelectric conversion on the detected laser signal of the first wavelength to obtain a channel signal using the OTN protocol, and the signal detection unit 321 for detecting the second wavelength performs photoelectric conversion on the detected laser signal of the second wavelength to obtain a channel signal using the CCSDS protocol.

[0138] In the embodiment provided by the present invention, by setting a plurality of signal detection units 321 corresponding one to one with at least two paths, and using the signal detection unit 321 to convert the received laser signal into a corresponding channel signal, it is possible to simultaneously convert laser signals of different wavelengths into channel signals corresponding to different optical communication protocols, thereby improving the conversion efficiency.

[0139] See also Fig.10 A schematic diagram of the structure of another baseband signal processing module provided in an embodiment of the present invention, wherein the baseband signal processing module 11 includes:

[0140] A plurality of baseband signal processing units 112 are connected to at least two signal detection units 321 in a one-to-one correspondence, and the baseband signal processing unit 112 is used to perform channel decoding on the received channel signal according to the optical communication protocol corresponding to the baseband signal processing unit 112 to obtain a signal corresponding to the optical communication protocol;

[0141] The signal converging unit 113 is connected to the output ends of at least two baseband signal processing units 112 , and is used to support converging and sending the signal streams output by the at least two baseband signal processing units 112 .

[0142] Each baseband signal processing unit 112 corresponds to an optical communication protocol. For example, the baseband signal processing unit 112 corresponding to the CCSDS protocol can perform channel decoding on the channel signal using the CCSDS protocol to obtain the corresponding signal; the baseband signal processing unit 112 corresponding to the OTN protocol can perform channel decoding on the channel signal using the OTN protocol to obtain the corresponding signal.

[0143] The baseband signal processing module 11 may include a baseband signal processing unit 112 corresponding to the CCSDS protocol, a baseband signal processing unit 112 corresponding to the OTN protocol, and may also include a baseband signal processing unit 112 corresponding to other optical communication protocols, which will not be described one by one here. When the total number of wavelengths of the laser signal included in the laser beam is less than the total number of baseband signal processing units 112 included in the baseband signal processing module 11, the baseband signal processing unit 112 of the unpaired laser signal does not work.

[0144] The signal converging unit 113 can correspond to signals adapted to the CCSDS protocol, signals adapted to the OTN protocol, signals adapted to other optical communication protocols, etc., and perform frame sorting using Ethernet Media Access Control Address (MAC) frames. The signal converging unit 113 converging all currently received signals corresponding to the optical communication protocols into Ethernet interface signals and sending them to the higher-level network.

[0145] In the embodiment provided by the present invention, by setting a baseband signal processing unit 112 corresponding to at least two optical communication protocols in the baseband signal processing module 11, and allowing the baseband signal processing unit to perform channel decoding on the received channel signal according to the corresponding optical communication protocol to obtain the corresponding signal, the baseband signal processing module 11 can provide the baseband processing capability on the receiving side for link transmission systems of different wavelengths, thereby improving the baseband processing efficiency.

[0146] Based on the same inventive concept, see Fig.11 The present invention provides a schematic diagram of a transceiver system according to an embodiment of the present invention. The transceiver system includes:

[0147] The transmitting system 1 as described above; for the specific implementation example, please refer to the receiving part of the aforementioned transmitting system, which will not be described in detail here.

[0148] The receiving system 2 as described above; for the specific implementation example, please refer to the receiving in the aforementioned receiving system, which will not be described in detail here.

[0149] The network interface P1 and the optical interface P2, the transmitting system 1 and the receiving system 2 are coupled between the network interface P1 and the optical interface P2; the network interface P1 can be an Ethernet interface or other network interfaces, and there is no specific limitation.

[0150] The optical antenna 3 is connected to the optical interface P2.

[0151] See also Fig.12 A schematic diagram of the structure of another transceiver system provided in an embodiment of the present invention, wherein the transceiver system further includes:

[0152] Control system 4 and servo turntable 5;

[0153] The servo turntable 5 is used to control the pointing direction of the optical antenna 3 to aim, capture and track the satellite communication link corresponding to the laser beam;

[0154] The control system 4 is used to control the baseband signal processing module 11 and the laser modulation module 21 , the optical antenna 3 and the servo turntable 5 to work in coordination.

[0155] Based on the same inventive concept, an embodiment of the present invention provides a satellite, comprising the transceiver system as described above.

[0156] See also Fig.13 A schematic diagram of inter-satellite communication in a satellite network provided by an embodiment of the present invention, wherein the satellite network includes a plurality of satellites ( Fig.11 Only three of them are shown in the figure), and the satellites communicate with each other through inter-satellite links. Each satellite includes the onboard access payload, onboard router, and transceiver system as described above.

[0157] Satellite access payload, used to support access from ground terminals.

[0158] Onboard routers are used to support signal forwarding and routing between satellite communication payloads.

[0159] Transceiver system used to transmit signals between satellites via intersatellite links.

[0160] Fig.13 The ground user terminal in the satellite communication is a user terminal on the ground that communicates with the satellite. The ground gateway is connected to the ground network (such as mobile network, Internet, etc.). The ground gateway can receive user data through the satellite network and transmit it to the ground network.

[0161] In a low-orbit satellite Internet with thousands of satellites, the space-based bearer network adopted by the system refers to the seven-layer reference model of Open System Interconnect (OSI) to build the space-based bearer network protocol stack, as shown in Table 1. In the model of the space-based bearer network, the network layer is mainly responsible for the forwarding and routing of Internet Protocol (IP) packets on satellite nodes, and the data link layer is mainly responsible for the unified bearing of upper-layer protocol data units, link addressing, and data encapsulation integrity verification.

[0162] Table 1 Space-based bearer network protocol stack

[0163]

[0164] In the physical layer, when the Ethernet port physical layer (Physical, PHY) code block encapsulates the Ethernet MAC frame, according to the customer's relevant business needs, a signal type identifier is added to the idle code block to allocate and distinguish the CCSDS protocol system and the OTN protocol system in the next layer. For example, the satellite router sets the signal type identifier to 0 in the data frame code block pre-transmitted to adapt to the CCSDS protocol, and sets the signal type identifier to 1 in the data frame code block pre-transmitted to adapt to the OTN protocol; then, according to the signal type identifier in the data frame code block, two bearer technologies are used to re-encapsulate the data frame code block and send it to the transceiver system. The bearer signal (first signal) of each optical communication protocol forms a laser signal of one wavelength, and the laser signals of multiple wavelengths are wavelength-division multiplexed in the transmitting system and the receiving system, respectively, to realize an intersatellite laser communication network in which a single intersatellite link channel carries multiple bearer technologies.

[0165] Based on the same inventive concept, an embodiment of the present invention provides a method for intersatellite laser communication, which is applied to the transmitting system as described above. The specific implementation of the method can refer to the description of the embodiment of the transmitting system, and the repeated parts will not be repeated. Fig.14 , the method comprising:

[0166] Step 1401: performing channel coding on signals corresponding to at least one optical communication protocol received simultaneously to obtain channel signals corresponding to the signals;

[0167] Step 1402: modulating a channel signal corresponding to at least one optical communication protocol into a laser signal of at least one wavelength;

[0168] Step 1403: Combine laser signals of at least one wavelength into a laser beam for transmission.

[0169] Based on the same inventive concept, an embodiment of the present invention provides a method for intersatellite laser communication, which is applied to the receiving system as described above. The specific implementation of the method can refer to the description of the embodiment of the receiving system, and the repeated parts will not be repeated. Fig.15 , the method comprising:

[0170] Step 1501: Decomposing a laser signal of at least one wavelength from a received laser beam;

[0171] Step 1502: Converting a laser signal of at least one wavelength into a channel signal corresponding to at least one communication protocol;

[0172] Step 1503: According to each optical communication protocol of the at least one optical communication protocol, channel decoding is performed on the corresponding channel signal to obtain a signal of the corresponding optical communication protocol;

[0173] Step 1504: Combine signals corresponding to at least one optical communication protocol and send them.

[0174] Based on the same inventive concept, an embodiment of the present invention provides a satellite communication system, including: at least one processor, and

[0175] a memory coupled to the at least one processor;

[0176] The memory stores instructions that can be executed by the at least one processor, and the at least one processor executes the above-mentioned method of inter-satellite laser communication by executing the instructions stored in the memory.

[0177] Based on the same inventive concept, an embodiment of the present invention further provides a readable storage medium, including:

[0178] Memory,

[0179] The memory is used to store instructions. When the instructions are executed by the processor, the device including the readable storage medium completes the inter-satellite laser communication method as described above.

[0180] The readable storage medium may be any available medium or data storage device that the processor can access, including volatile memory or non-volatile memory, or may include both volatile memory and non-volatile memory. As an example and not limitation, non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory, solid state disk (SSD), magnetic storage (e.g., floppy disk, hard disk, magnetic tape, magneto-optical disc (MO), etc.), optical storage (e.g., CD, DVD, BD, HVD, etc.). Volatile memory may include random access memory (RAM), which may act as an external cache memory. By way of example and not limitation, RAM is available in a variety of forms, such as dynamic random access memory (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced synchronous DRAM (ESDRAM), and synchronous link DRAM (SLDRAM). The memory devices of the disclosed aspects are intended to include, but are not limited to, these and other suitable types of memory.

[0181] Those skilled in the art will appreciate that the embodiments of the present invention may be provided as methods, systems, or program products. Therefore, the embodiments of the present invention may be in the form of complete hardware embodiments, complete software embodiments, or embodiments combining software and hardware. Moreover, the embodiments of the present invention may be in the form of machine program products implemented on one or more readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer / processor available program codes.

[0182] The embodiments of the present invention are described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0183] These program instructions may also be stored in a readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the readable memory produce a manufactured product including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0184] These program instructions may also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer / processor-implemented process, thereby providing instructions executed on the computer / processor or other programmable device for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0185] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A transmitting system, characterized in that: include: A baseband signal processing module, a laser modulation module, and a laser emission module; wherein the laser modulation module is connected between the baseband signal processing module and the laser emission module; The baseband signal processing module is used to support channel coding of signals corresponding to at least two optical communication protocols to obtain corresponding channel signals; The laser modulation module is used to support modulation of the channel signals corresponding to the at least two optical communication protocols into laser signals of at least two wavelengths; The laser emission module is used to support the synthesis of laser signals corresponding to the at least two wavelengths into a laser beam for emission.

2. The transmitting system according to claim 1, characterized in that The baseband signal processing module comprises: A signal shunting unit, used to shunt the signals corresponding to the at least two optical communication protocols according to the signal identifier carried by the signal or the Ethernet logical interface from which the signal comes; wherein the signal identifier is used to identify the optical communication protocol adapted by the signal, and the Ethernet logical interface is used to transmit the signal corresponding to the corresponding optical communication protocol; At least two baseband signal processing units correspond one-to-one to the at least two optical communication protocols, and the baseband signal processing units are connected between the signal diversion unit and the laser modulation module; the baseband signal processing unit is used to perform the channel coding on the signal received from the signal diversion unit according to the optical communication protocol corresponding to the channel processing unit to obtain the corresponding channel signal.

3. The transmitting system according to claim 2, characterized in that The laser modulation module comprises: At least two laser modulation submodules, corresponding one to one with the at least two baseband signal processing units; the laser modulation submodules include a laser and a laser modulation unit; A laser, used to provide a seed light source of one wavelength; A laser modulation unit is connected between the corresponding baseband signal processing unit and the laser emission module, and the laser modulation unit is also connected to the laser; the laser modulation unit is used to modulate the seed light source into a corresponding laser signal according to the received channel signal, and send it to the laser emission module.

4. The transmitting system according to claim 3, characterized in that The laser emission module comprises: The wavelength division multiplexer is used to synthesize the laser signals received from the at least two laser modulation submodules into the laser beam for emission.

5. A receiving system, characterized in that: include: Laser receiving module, signal detection module, baseband signal processing module; The signal detection module is connected between the laser receiving module and the baseband signal processing module; The laser receiving module is used to support decomposing laser signals corresponding to at least two wavelengths from the received laser beam; The signal detection module is used to support the conversion of laser signals corresponding to the at least two wavelengths into channel signals corresponding to at least two optical communication protocols. The baseband signal processing module is used to support channel decoding of channel signals corresponding to the at least two optical communication protocols to obtain signals corresponding to the at least two optical communication protocols.

6. The receiving system according to claim 5, characterized in that The laser receiving module comprises: The optical coupler is used to support receiving the laser beam; The wave demultiplexer is connected between the optical coupler and the signal detection module. The wave demultiplexer is used to support decomposing the laser signals of at least two wavelengths from the laser beam and transmit them to the signal detection module through at least two paths corresponding to the at least two wavelengths.

7. The receiving system according to claim 6, characterized in that The signal detection module comprises: At least two signal detection units correspond one to one with at least two paths; the signal detection unit is used to receive a laser signal corresponding to a wavelength, and perform photoelectric conversion on the laser signal of the wavelength to obtain a corresponding channel signal.

8. The receiving system according to claim 7, characterized in that The baseband signal processing module comprises: At least two baseband signal processing units are connected to the at least two signal detection units in a one-to-one correspondence, and the baseband signal processing units are used to perform the channel decoding on the received channel signal according to the optical communication protocol corresponding to the baseband processing unit to obtain a signal corresponding to the optical communication protocol; A signal converging unit is connected to the output ends of the at least two baseband signal processing units, and the signal converging unit is used to support the converging and sending of the signals output by the at least two baseband signal processing units.

9. A transceiver system, characterized in that: include: The transmitting system according to any one of claims 1 to 4; The receiving system according to any one of claims 5 to 8; A network interface and an optical interface, the transmitting system and the receiving system are both coupled between the network interface and the optical interface; An optical antenna is connected to the optical interface.

10. The transceiver system according to claim 9, characterized in that: Also includes: Control systems and servo turntables; The servo turntable is used to control the pointing direction of the optical antenna to aim, capture and track the satellite communication link corresponding to the laser beam; The control system is used to control the baseband signal processing module and the laser modulation module, the optical antenna and the servo turntable to work in coordination.

11. A satellite, characterized in that: Comprising the transceiver system as claimed in claim 10.

12. A method for inter-satellite laser communication, applied to the transmitting system according to any one of claims 1 to 4, characterized in that: include: Channel coding is performed on signals corresponding to at least one optical communication protocol received simultaneously to obtain channel signals corresponding to the signals; Modulating a channel signal corresponding to the at least one optical communication protocol into a laser signal of at least one wavelength; The laser signals of the at least one wavelength are combined into a laser beam for transmission.

13. A method for inter-satellite laser communication, applied to the receiving system according to any one of claims 5 to 8, characterized in that: include: Decomposing a laser signal of at least one wavelength from the received laser beam; Converting the laser signal of the at least one wavelength into a channel signal corresponding to at least one communication protocol; According to each optical communication protocol of the at least one optical communication protocol, channel decoding is performed on a corresponding channel signal to obtain a signal of the corresponding optical communication protocol; The signals corresponding to the at least one optical communication protocol are combined and then sent.

14. A satellite communication system, characterized in that: include: at least one processor, and a memory coupled to the at least one processor; The memory stores instructions that can be executed by the at least one processor, and the at least one processor executes the method according to claim 12 or 13 by executing the instructions stored in the memory.

15. A readable storage medium, characterized in that: Including memory, The memory is used to store instructions, and when the instructions are executed by the processor, the device including the readable storage medium performs the method according to claim 12 or 13.

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