CN118118077A - Micro-nano star networking method - Google Patents
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Abstract
The invention provides a micro-nano star group network method, which comprises the steps of constructing a wiener star group network comprising at least two sub-stars and a main star, wherein the main star is communicated with any one sub-star, all the sub-stars form a sub-star group, the sub-star group completes a group task under the command of the main star, and the sub-stars in the sub-star group can also be communicated. The invention realizes that a plurality of micro-nano satellites form a cooperative star group through the double-channel double-antenna and the corresponding inter-satellite network protocol. Each member in the wiener star group network cooperates with each other and communicates with each other, and the cooperation completes the work of data analysis, communication, investigation and the like, and has the advantages of strong destruction resistance, reliable performance, strong maneuverability, strong adaptability and the like. The method solves the complexity problems of typical multi-objective optimization such as rapid dynamic topology adaptability, low-delay transmission and the like existing in the task execution period, and promotes the application of the rapid dynamic networking technology in the micro-nano star group platform.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a micro-nano star networking method.
Background
The European space agency minisatellite formation flight plan Proba spacecraft is a series of small, low cost satellites carrying scientific loads for verification of new spacecraft technology, wherein Proba-3 is used for verification of technologies required for multiple spacecraft formation flights. The university of America's nano-star plan is a research plan about nano-star and formation flight technology thereof, and is focused on aspects of formation flight, micro propulsion, multifunction, miniaturized remote sensors, guidance and navigation, cooperative processing, inter-satellite communication and the like.
The 'American national defense advanced research planning office F6 system' is a typical distributed spacecraft networking system, each module satellite carries different functions or resources related to a spaceflight task, and a physical separation mode, a star group free flight mode, a wireless information exchange mode and a wireless energy exchange mode are adopted, so that functions are coordinated, and resources are shared to form a virtual large satellite to complete a specific task.
Along with the development of micro-nano satellite cluster formation technology, the demand of the star cluster network technology is more and more urgent, and how to match each member and how to increase the reliability is a problem to be solved.
Disclosure of Invention
The invention provides a micro-nano star networking method for solving the problems of synergy and poor reliability of a star networking, which realizes that a plurality of micro-nano stars form a synergistic star group through double-channel double antennas and corresponding inter-star network protocols. Each member in the wiener star group network cooperates with each other and communicates with each other, and the cooperation completes the work of data analysis, communication, investigation and the like, and has the advantages of strong destruction resistance, reliable performance, strong maneuverability, strong adaptability and the like. The method solves the complexity problems of typical multi-objective optimization such as rapid dynamic topology adaptability, low-delay transmission and the like existing in the task execution period, and promotes the application of the rapid dynamic networking technology in the micro-nano star group platform.
The invention provides a micro-nano star group network method, which comprises the steps of constructing a wiener star group network comprising at least two sub-stars and a main star, wherein the main star is communicated with any one sub-star, all the sub-stars form a sub-star group, the sub-star group completes a group task under the command of the main star, and the sub-stars in the sub-star group can also be communicated;
The wiener star group network is a cluster architecture and uses a centrally organized network architecture, and a main star is a cluster head node, so that network access control, resource scheduling, telemetering information feedback relay and remote control instruction uploading distribution of the wiener star group network are performed; the child star is a member node, and applies for obtaining network resources from the main star and carrying out inter-planetary cooperative communication.
In the micro-nano star group network method, as a preferable mode, a Data service frame of a wiener star group network comprises a synchronization sequence SYN, a transmission format indication TFI, data and a protection interval GP which are sequentially arranged;
the synchronization sequence SYN performs AGC, bit synchronization and carrier synchronization, the transmission format indicates TFI to perform frame synchronization, the Data is an encoded frame, and the content of the protection interval GP is empty.
In the micro-nano star group network method, as a preferable mode, communication of a wiener star group network uses L wave band and BPSK+ spread spectrum modulation, and a data part uses 2/3LDPC coding;
The Data is an LDPC coded frame, and the transport format indication TFI is respectively positioned at the front and the rear of the Data.
The invention relates to a micro-nano star group network method, which is characterized in that the micro-nano star group network also comprises a sub-star communication terminal connected inside the sub-star and a main star communication terminal connected inside the main star as an optimal mode;
The sub-star communication terminal comprises a networking module A, a networking module B, a sub-star power module, an interface and an antenna switching module which are connected with the networking module A and the networking module B; the networking module A and the networking module B both comprise an SOC chip and a radio frequency transceiver and are mutually backup, and the sub-star communication terminal performs on-orbit networking;
The main star communication terminal comprises a main star communication terminal A machine and a main star communication terminal B machine which are identical in structure, wherein the main star communication terminal A machine comprises an integrated control management module, a signal receiving and transmitting and processing module and a power supply module which are mutually connected, the signal receiving and transmitting and processing module comprises a processing unit and a channel unit connected with a main star antenna, and the processing unit is an FPGA;
the signal receiving and transmitting and processing module takes the FPGA as a signal processing core and can carry out on-orbit function configuration and on-orbit function reconstruction.
According to the micro-nano star networking method, as an optimal mode, the sub-star is connected with the two-channel antenna system, and the two-channel antenna system receives 2 paths of signals in different directions at the same time.
The invention relates to a micro-nano star networking method, which is characterized in that a double-channel antenna system comprises a first antenna connected to the top of a sub-star, a second antenna connected to the bottom of the sub-star, a first radio frequency unit connected with the first antenna and connected to the inside of the sub-star, a second radio frequency unit connected with the second antenna, and a baseband FPGA connected to the inside of the sub-star and connected with both the first radio frequency unit and the second radio frequency unit;
The working method of the dual-channel antenna system comprises the following steps: the first antenna and the second antenna simultaneously receive signals and respectively transmit the signals to the baseband FPGA through the first radio frequency unit and the second radio frequency unit, and the baseband FPGA carries out synchronization and frequency offset estimation on the received signals and calculates the signal to noise ratio;
The baseband FPGA judges whether the signal quality meets a set reference, if so, the baseband FPGA compares the signal to noise ratios of two paths of signals and selects the signal with high signal to noise ratio for demodulation and channel decoding; if not, the baseband FPGA performs digital synthesis on the two paths of signals.
According to the micro-nano star networking method, as an optimal mode, the first antenna and the second antenna are hemispherical antennas;
the dual-channel antenna system further comprises a directional antenna connected to the main star;
delay and phase adjustment are carried out before digital synthesis of the two paths of signals, and spectrum synthesis is carried out by utilizing spectrum characteristics of the signals; when the spectral characteristics of the received signal are known, spectral filtering of the received signal; when the spectrum of the received signal is unknown or noise-like, the received signal is processed as a whole;
The spectrum synthesis method comprises the following steps: after two paths of signals are received simultaneously, respectively carrying out delay, phase shifting and matched filtering under the control of a delay and phase shifting controller, and then carrying out cross correlation and signal synthesis to sequentially obtain a carrier ring, a subcarrier ring and a symbol ring and outputting the carrier ring, the subcarrier ring and the symbol ring;
the correlation algorithm when the two paths of signals are digitally synthesized is a Simple algorithm.
The invention relates to a micro-nano star networking method, which is characterized in that a star network protocol system of a wiener star network is as follows: the OSI seven-layer model and the TCP/IP five-layer model.
The invention relates to a micro-nano star networking method, which is characterized in that a TCP/IP five-layer model comprises an application layer, a transmission layer, a network layer, a link layer and a physical layer which are sequentially interconnected from top to bottom;
the application layer processes the relative position information, the ground control information, the task assignment information and the low-speed information;
the transmission layer comprises UDP/IP and a special channel;
the network layer carries out radio resource management, flow control, IP addressing and serves as a routing sub-layer;
The link layer performs wireless link control, media access control, service convergence, encryption and decryption;
the physical layer performs frequency/time synchronization, encoding/decoding, modulation/adjustment, high-speed link, and low-speed link.
In the micro-nano star group network method, as a preferable mode, a resource competition mechanism and an OLSR (on-line distributed request) improvement protocol are used by a wiener star group network in a TDMA (time division multiple access) communication mode;
The resource competition mechanism is as follows: each sub-star completes clock synchronization and network synchronization, and enters a normal working state after creating a routing table; then each sub-star carries out service transmission, shi Min service and control instruction are transmitted on the fixed time slot in priority; the common business firstly carries out the competition reservation of time slots, and each node carries out the transmission of business data in the assigned preset time slots according to the distributed time slot competition result;
The OLSR improvement protocol is: establishing a link perception table and a neighbor node table through periodic interaction of HELLO packets; establishing a topology table through periodic interaction of TC groups; and finally, carrying out route calculation and route table updating based on an information base established by the HELLO packet and the TC packet.
With the development of micro-nano satellite cluster formation technology, the demand of star cluster network technology is also getting more and more urgent. The invention relates to a micro-nano star networking method, which realizes that a plurality of micro-nano stars form a cooperative star group through a double-channel double-antenna technology and a corresponding inter-star network protocol. Each member in the wiener star group network cooperates with each other and communicates with each other, and the cooperation completes the work of data analysis, communication and the like, and has the advantages of low power consumption, strong destruction resistance, reliable performance, strong maneuverability, strong adaptability and the like.
The invention combines the current research on the aspects of micro-nano star group architecture, system, link, protocol and the like, reasonably designs the link according to the ' clear application requirement ', improves the transmission capacity and standardizes the system requirement ', and comprehensively designs the existing state and future development requirement, thereby providing a micro-nano star group networking method and providing design thought and technical support for the construction of the micro-nano star group.
The invention has the following advantages:
The invention provides a micro-nano star networking method, each member cooperates with each other and communicates with each other, and the cooperation completes the work of data analysis, communication and the like, and has the advantages of strong destruction resistance, reliable performance, strong maneuverability, strong adaptability and the like.
(1) The wiener star group network consists of a main star platform and sub-stars, wherein the main star platform carries the sub-stars to release the sub-stars after the sub-stars enter the orbit, the sub-stars form a sub-star group, and the group task is completed under the command of the main star platform.
(2) The communication among all the sub-stars in the star group is bidirectional communication;
(3) The communication cost is low, the reliability is strong, and the reconfiguration is realized;
(4) The wiener star group network can be dynamically networked, and can adapt to a distributed information processing architecture;
(5) The omnidirectional inter-satellite communication subsystem has light weight, and the product is suitable for different orbit space environments.
Drawings
FIG. 1 is a schematic diagram of a micro-nano star network architecture of a micro-nano star networking method;
fig. 2 is a schematic diagram of data service frame structure type of a micro-nano star networking method;
FIG. 3 is a schematic diagram of a sub-star communication terminal structure of a micro-nano star networking method;
Fig. 4 is a schematic diagram of a sub-star communication terminal composition of a micro-nano star networking method;
FIG. 5 is a schematic diagram of a main star communication terminal structure of a micro-nano star networking method;
FIG. 6 is a schematic diagram of a main star communication terminal of a micro-nano star networking method;
FIG. 7 is a schematic diagram of a micro-nano star network of a micro-nano star networking method;
FIG. 8 is a schematic diagram of a sub-star of a micro-nano star networking method;
FIG. 9 is a schematic diagram of receiving 2 sub-signals of a micro-nano star networking method;
FIG. 10 is a schematic diagram of 2-way signal coherent synthesis of a sub-star of a micro-nano star networking method;
FIG. 11 is a schematic diagram of a star network protocol system of a micro-nano star networking method;
FIG. 12 is a graph of the spectrum simulation result before 2-way antenna signal synthesis of the micro-nano star networking method;
Fig. 13 is a graph of spectrum simulation results after 2-path antenna signals of the micro-nano star networking method are synthesized.
Reference numerals:
1. A son star; 2. a main star; 3. a sub-star communication terminal; 31. a networking module A; 32. a networking module B; 33. a sub-star power module; 34. an interface and an antenna switching module; 4. a main star communication terminal; 41. a main star communication terminal A machine; 411. a comprehensive control management module; 412. a signal receiving and transmitting and processing module; 413. a power module; 42. a main star communication terminal B machine; 5. a first antenna; 6. a second antenna; 7. a first radio frequency unit; 8. a second radio frequency unit; 9. a baseband FPGA; 10. a directional antenna.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Example 1
As shown in fig. 1 to 13, in a micro-nano star networking method, according to the topological motion scene of a star group, a network architecture is generally designed into a cluster, a central organization network architecture is adopted, any two satellite nodes 1 can communicate, and a network architecture schematic diagram is shown in fig. 1 and 7. The main star 2 is used as a cluster head node and is responsible for network access control, resource scheduling, remote measurement information feedback relay, remote control instruction uploading distribution and the like of the whole network. The son star 1 is used as a member node, applies to the mother star 2 for obtaining network resources, and performs inter-planet cooperative communication.
1. Link system
The L-band space link has small attenuation, and is beneficial to the miniaturization and low-power consumption design of the inter-satellite communication machine. With BPSK+ spread spectrum modulation, the data portion is encoded with 2/3 LDPC. The Data service frame consists of four parts of a synchronization sequence SYN, a transmission format indication TFI, data and a protection interval GP. As shown in fig. 2, the frame structure of the Data service includes SYN, TFI, data and GP s, the synchronization sequence SYN in the frame structure is used for AGC, bit synchronization, and carrier synchronization, the transport format indicates that TFI is used for frame synchronization, the Data is an LDPC encoded frame, and the GP portion is empty. The data traffic frame structure is shown in fig. 2.
2. Hardware scheme
The single machine in the star group comprises two single machines of a sub-star communication terminal 3 and a main star communication terminal 4, which are respectively arranged on the sub-star 1 and the main star platform 2. The hardware design thought of the two terminals adopts differential design according to the carried satellite resources.
1. Sub-star communication terminal 3
The design of the sub-star communication terminal 3 follows the following principle:
based on the design concept of software radio, the architecture of the SOC+radio frequency transceiver is taken as a core, so that the on-orbit networking function of the terminal is realized;
according to the satellite resource quantity, adopting a modularized and generalized design concept to complete the design of a miniaturized and low-power-consumption terminal;
under the condition of meeting the task requirement, the reliability and the service life of the terminal are improved by adopting a multi-module backup mode, and the terminal configuration is shown in figures 3-4.
2. Main star communication terminal 4
The main star communication terminal 4 is designed to follow the following principle:
based on the design concept of software radio, FPGA is taken as a signal processing core, so that the on-orbit function is configurable and reconfigurable, and the upgrading and reconstruction requirements of subsequent product serialization are met;
The modularized and generalized design concept is adopted, terminal index requirements are comprehensively met, reasonable module division is carried out on the terminal index requirements, the implementation complexity is reduced, the reliability, maintainability and expandability of the product are improved, and the terminal configuration is shown in figures 5-6.
3. Dual channel dual antenna scheme
Each node in the cluster needs to communicate with other nodes, the positions of the nodes in the three-dimensional space are random, and the communication direction between the nodes is not fixed. Considering the application scene of satellite groups, it is difficult to ensure reliable and stable link establishment in the full space domain by using a traditional omni-directional antenna or a directional antenna, and how to realize full space domain communication between nodes is a key point.
As shown in fig. 7 to 9, the dual-channel dual-antenna system can simultaneously receive 2 paths of signals in different directions, so as to realize the function of increasing the airspace communication range of the system. 2 antennas 5, 6 with hemispherical patterns are respectively arranged at the top and the bottom of the satellite 1, and an omni-directional pattern is formed in an airspace.
The rear ends of the 2 antennas are respectively connected with independent radio frequency channels 7 and 8 to receive signals, and the 2 paths of signals are simultaneously sent to a baseband FPGA9.FGPA9 synchronizes and frequency offset estimates the received 2-way signal and calculates the SNR. And under the condition that the signal quality meets the requirement, comparing the SNR of the 2 paths of signals, and selecting the signals with high quality for demodulation and channel decoding. Under the condition of poor signal quality, 2 paths of signals are digitally synthesized to meet the communication requirement.
As shown in fig. 10, to ensure coherence, the signal must be delayed and phase adjusted prior to synthesis. Spectral synthesis may make use of the spectral characteristics of a signal and not rely on its spectrum. If spectral characteristics are known, the spectrum of the received signal may be filtered; if the spectrum of the received signal is unknown or noise-like, it can be processed as a whole.
4. Networking protocol scheme
1. Network protocol system
The inter-satellite communication system adopts an OSI seven-layer model and a TCP/IP five-layer model, adopts a five-layer protocol system which is widely applied, and sequentially comprises an application layer, a transmission layer, a network layer, a link layer and a physical layer from top to bottom. The network protocol architecture is shown in FIG. 11.
2. Network protocol design
In the TDMA communication mode, a resource competition mechanism and an OLSR improved protocol are adopted, so that the network resource utilization rate can be effectively improved, and the network topology change can be dynamically adapted.
In TDD communication mode, the network needs to have high precision time transfer capability, and the time references of the network nodes must be uniform. The main star platform and the sub star group both run on the GEO track, and time service synchronization is difficult to be carried out through the Beidou/GPS, so that the time synchronization of each node of the network is carried out in a self-synchronization mode. The whole network adopts a bidirectional time synchronization system to eliminate transmission distance delay. For a fixed TDMA access mode, in the network operation process, the situation of unbalanced transmission service is often encountered, that is, the load on some nodes is too heavy, even congestion occurs, so that the packet is lost, and other nodes have idle time slot resources, so that the channel utilization rate is greatly reduced, and therefore, a TDMA time slot allocation method with competition is introduced.
For a dynamic routing protocol with dynamic distribution of resources, aiming at a multi-hop network scene, the dynamic routing protocol needs to be introduced to adapt to the conditions of high node moving speed, frequent topology change and the like. The OLSR routing protocol is a priori link state routing protocol, which is formed by optimizing a standard link state routing protocol in order to adapt to the requirements of the Ad hoc network. Each node maintains a routing table, the destination node is known, and the next 1-hop node is known by searching the routing table. According to the scheme, a link perception table, a neighbor node table and the like are established by adopting an OLSR (on line discovery protocol) improved protocol and through periodic interaction of HELLO (high-level network) packets based on the principles of shortest path priority and flooding prevention; the topology table is built through periodic interactions of TC packets. And finally, based on the information base established by the packets, carrying out route calculation and route table updating.
Each sub-star in the network completes clock synchronization and network synchronization, and enters a normal working state after creating a routing table; then each sub-star carries out service transmission, shi Min service and control instruction are transmitted on the fixed time slot in priority; the common service firstly performs the competition reservation of the time slot, and each node performs the transmission of the service data in the assigned preset time slot according to the distributed time slot competition result.
The frequency spectrum synthesized by the 2 paths of signals is simulated, a simulation signal source of a simulation system adopts the same signal source, a modulation signal adopts a BPSK signal, the performance of each antenna is set to be consistent, and the received signal strength is also consistent; the noise of each antenna channel is gaussian white noise independent of each other. The simulation assumes that the delay has been corrected, and the main processing required is to calculate the phase offset between the signals by correlation and correct the phase, and the correlation algorithm in the antenna signal synthesis adopts the Simple algorithm. The simulation results are shown in fig. 12-13, and the synthesized signal is obviously enhanced.
Spectrum simulation result before and after 2-path antenna signal synthesis
The sub-star communication terminal 3 uses 2 hemispherical antennas 5 and 6, and the main indexes are as follows.
| Antenna form | Hemispherical antenna |
| Polarization mode | Vertical polarization |
| Maximum gain | ≥-2.5dBi |
| Beamwidth | ≥±60° |
| Input impedance | 50Ω |
| Standing wave ratio | ≤2:1 |
| Antenna form | Monopole antenna |
The main star platform communication terminal 4 adopts a directional antenna 10, and the main indexes are as follows.
| Horizontal front lobe 3dB beam width | ≥30° |
| Vertical front lobe 3dB beam width | ≥30° |
| Input impedance | 50Ω |
| Standing wave ratio | ≤2:1 |
| Antenna form | Horn antenna |
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (10)
1. A micro-nano star networking method is characterized in that: constructing a wiener star group network comprising at least two sub-stars (1) and a main star (2), wherein the main star (2) communicates with any one of the sub-stars (1), all the sub-stars (1) form a sub-star group, the sub-star group completes a cluster task under the command of the main star (2), and the sub-stars (1) in the sub-star group can also communicate;
The wiener star group network is a cluster architecture and uses a centrally organized network architecture, and the main star (2) is a cluster head node and performs network access control, resource scheduling, telemetering information feedback relay and remote control instruction uploading distribution of the wiener star group network; the child star (1) is a member node, applies for obtaining network resources from the main star (2) and performs inter-satellite cooperative communication.
2. The micro-nano star networking method according to claim 1, wherein the method comprises the following steps: the Data service frame of the wiener star group network comprises a synchronization sequence SYN, a transmission format indication TFI, data and a protection interval GP which are sequentially arranged;
The synchronization sequence SYN performs AGC, bit synchronization and carrier synchronization, the transmission format indicates TFI to perform frame synchronization, the Data is a coding frame, and the content of the protection interval GP is empty.
3. The micro-nano star networking method according to claim 2, wherein: communication of the wiener star group network uses L wave band, BPSK+ spread spectrum modulation, and a data part uses 2/3LDPC coding;
The Data is an LDPC coded frame, and the transport format indication TFI is respectively positioned at the front and the rear of the Data.
4. The micro-nano star networking method according to claim 1, wherein the method comprises the following steps: the wiener star group network also comprises a sub-star communication terminal (3) connected inside the sub-star (1) and a main star communication terminal (4) connected inside the main star (2);
The sub-star communication terminal (3) comprises a networking module A (31), a networking module B (32), a sub-star power module (33) and an interface and antenna switching module (34), wherein the sub-star power module (33) and the interface and antenna switching module (34) are connected with the networking module A (31) and the networking module B (32); the networking module A (31) and the networking module B (32) comprise an SOC chip and a radio frequency transceiver and are mutually backup, and the sub-star communication terminal (3) performs on-orbit networking;
The main star communication terminal (4) comprises a main star communication terminal A machine (41) and a main star communication terminal B machine (42) which are identical in structure, the main star communication terminal A machine (41) comprises an integrated control management module (411), a signal receiving and processing module (412) and a power supply module (413) which are mutually connected, the signal receiving and processing module (412) comprises a processing unit and a channel unit connected with an antenna of the main star (2), and the processing unit is an FPGA;
The signal receiving and transmitting and processing module (412) takes an FPGA as a signal processing core, and can perform on-orbit function configuration and on-orbit function reconstruction.
5. The micro-nano star networking method according to claim 1, wherein the method comprises the following steps: the sub-star (1) is connected with a two-channel antenna system, and the two-channel antenna system receives signals in 2 paths in different directions at the same time.
6. The micro-nano star networking method according to claim 5, wherein the method comprises the following steps: the dual-channel antenna system comprises a first antenna (5) connected to the top of the sub-star (1), a second antenna (6) connected to the bottom of the sub-star (1), a first radio frequency unit (7) connected with the first antenna (5) and connected to the inside of the sub-star (1), a second radio frequency unit (8) connected with the second antenna (6), and a baseband FPGA (9) connected to the inside of the sub-star (1) and connected to both the first radio frequency unit (7) and the second radio frequency unit (8);
The working method of the dual-channel antenna system comprises the following steps: the first antenna (5) and the second antenna (6) simultaneously receive signals and respectively transmit the signals to the baseband FPGA (9) through the first radio frequency unit (7) and the second radio frequency unit (8), and the baseband FPGA (9) carries out synchronization and frequency offset estimation on the received signals and calculates a signal to noise ratio;
The baseband FPGA (9) judges whether the signal quality meets a set reference, if so, the baseband FPGA (9) compares the signal to noise ratios of two paths of signals and selects the signal with high signal to noise ratio for demodulation and channel decoding; if not, the baseband FPGA (9) performs digital synthesis on the two paths of signals.
7. The micro-nano star networking method according to claim 6, wherein: the first antenna (5) and the second antenna (6) are hemispherical antennas;
The dual-channel antenna system further comprises a directional antenna (10) connected to the main star (2);
delay and phase adjustment are carried out before digital synthesis of the two paths of signals, and spectrum synthesis is carried out by utilizing spectrum characteristics of the signals; when the spectral characteristics of the received signal are known, spectral filtering of the received signal; when the spectrum of the received signal is unknown or noise-like, the received signal is processed as a whole;
The spectrum synthesis method comprises the following steps: after two paths of signals are received simultaneously, respectively carrying out delay, phase shifting and matched filtering under the control of a delay and phase shifting controller, and then carrying out cross correlation and signal synthesis to sequentially obtain a carrier ring, a subcarrier ring and a symbol ring and outputting the carrier ring, the subcarrier ring and the symbol ring;
the correlation algorithm when the two paths of signals are digitally synthesized is a Simple algorithm.
8. The micro-nano star networking method according to claim 1, wherein the method comprises the following steps: the star network protocol system of the wiener star group network is as follows: the OSI seven-layer model and the TCP/IP five-layer model.
9. The micro-nano star networking method according to claim 8, wherein: the TCP/IP five-layer model comprises an application layer, a transmission layer, a network layer, a link layer and a physical layer which are sequentially interconnected from top to bottom;
the application layer processes the relative position information, the ground control information, the task assignment information and the low-speed information;
the transmission layer comprises UDP/IP and a special channel;
the network layer carries out radio resource management, flow control, IP addressing and serves as a routing sub-layer;
The link layer performs wireless link control, media access control, service convergence, encryption and decryption;
the physical layer performs frequency/time synchronization, encoding/decoding, modulation/adjustment, high-speed link, and low-speed link.
10. The micro-nano star networking method according to claim 8, wherein: in TDMA communication mode, the wiener star network uses a resource contention mechanism and OLSR improvement protocol;
The resource competition mechanism is as follows: each sub star (1) completes clock synchronization and network synchronization, and enters a normal working state after creating a routing table; then each sub-star (1) carries out service transmission, shi Min service and control instruction are preferentially transmitted on a fixed time slot; the common business firstly carries out the competition reservation of time slots, and each node carries out the transmission of business data in the assigned preset time slots according to the distributed time slot competition result;
the OLSR improvement protocol is: establishing a link perception table and a neighbor node table through periodic interaction of HELLO packets; establishing a topology table through periodic interaction of TC groups; and finally, carrying out route calculation and route table updating based on an information base established by the HELLO packet and the TC packet.
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