Beidou global system full-link space environment channel simulation method and system

Abstract

The invention relates to a Beidou global system full-link space environment channel simulation method and system. The method comprises the following steps: acquiring operation control parameters of a signal transceiving link, and setting scene standard operation control information according to the operation control parameters and parameter information of a simulation object participating in link information transceiving. According to the scene standard operation control information, the channel model corresponding to the scene standard operation control information and the relative motion state of the simulation object, each link in the space environment channel is uniformly driven and then simulation is carried out. And completing communication simulation of the simulation object in a link corresponding to the channel link establishment relationship according to the channel characteristic simulation parameter and the channel link establishment relationship. And synchronizing operation time-frequency information and time-frequency signals of all subsystems in the system so as to calibrate scene standard operation control information, channel link simulation and communication simulation of a full-link space environment channel. By adopting the method, the full-link, full-frequency-point, full-scene and full-dynamic channel simulation capability can be flexibly implemented.

Description

Technical Field

[0001] The present invention relates to the technical field of space environment channel simulation, and in particular to a Beidou global system full-link space environment channel simulation method and system. Background Art

[0002] The BeiDou system is a global system in the aerospace field and a typical representative of the complex giant system in aerospace engineering. It is networked by dozens of in-orbit satellites, dozens of ground receiving stations, injection stations and other satellite-ground integrated collaborative operations to provide high-precision and high-reliability positioning, navigation and timing services to the world. The system includes multiple signal links such as uplink injection, inter-satellite link, downlink navigation, satellite-ground anchoring and telemetry and remote control, and has multiple frequency points in the L, S, C, Ka and other frequency bands. There are various types of communications such as continuous broadcasting and polling, covering hundreds of channels such as satellite-ground uplink and downlink, and inter-satellite interconnection, which are interrelated, mutually restricted and influence each other. For wireless signal reception and transmission, the traditional wired connection test under static conditions cannot represent the performance in a real dynamic environment. For the Beidou global system, in order to test the comprehensive performance of the entire system under real operating conditions, it is necessary to build an equivalent spatial dynamic signal propagation environment to simulate the changes in power, delay, phase, frequency and other characteristics caused by the propagation of different link signals in different spatial environment channels, so that the ground-stationary satellites, ground receiving stations, injection stations and navigation user equipment can participate in the real dynamic operation state of the system equivalently, thereby facilitating a more accurate evaluation of the compliance between the test results of each link and the design indicators.

[0003] After searching the prior art, a Chinese invention patent (application publication number: CN 111628814 B) was found. The invention name is an intersatellite link simulation device and simulation method for deep space communication. Its main purpose is to solve the problem of intersatellite link channel simulation required for deep space communication. By using the digital information domain equivalent simulation signal domain channel method, the influence of satellite channel fading, noise interference, etc. on the communication performance of the digital information domain can be accurately simulated according to the satellite operation geometric parameters and the environment in which it is located.

[0004] However, the Chinese invention patent (application publication number: CN 111628814 B), whose invention name is Intersatellite link simulation device and simulation method for deep space communication, only considers the intersatellite link channel simulation for deep space communication, and simulates the required fading and noise characteristics, etc. It does not consider the real-time fast switching design of polling communication when multiple intersatellite links coexist, nor does it consider the link channel simulation scenarios such as satellite-to-ground downlink and channel characteristics such as phase shift and frequency shift. It is not suitable for the full-link space environment channel simulation of the Beidou global system.

[0005] The Chinese invention patent (application publication number: CN 114374451 B), the invention name is a large-scale multi-input multi-output channel simulation method and device based on optical matrix switching, and its main purpose is to solve the long-distance centralized-distributed layout requirements between various types of equipment in the system faced by the multi-input multi-output channel simulation system, as well as the large-scale parallel expansion requirements of the number of system input and output links. This patent creatively adopts a new optical matrix switching system architecture, and each subsystem is interconnected by various optical fiber connections to transmit high-speed data signals, communication information, control instructions, frequency, pulse and time signals, etc., so that the multi-input multi-output channel simulation system has centralized-distributed layout capabilities and large-scale parallel expansion capabilities.

[0006] However, the Chinese invention patent (application publication number: CN 114374451 B), whose invention name is Large-scale MIMO channel simulation method and device based on optical matrix switching, only implements the large-scale long-distance distributed channel simulation system architecture design from the perspective of supporting MIMO multiple channel simulation, and does not fully consider the differences in channel characteristics and simulation implementation in different channel environment scenarios for different frequency bands. It is not suitable for the specific various types of link characteristic simulation implementation required for the Beidou global system full-link space environment channel simulation.

[0007] In summary, the current channel simulation methods either only consider the channel simulation design of a certain special link signal, or only focus on the channel simulation design of multiple identical or similar link signals. Most of them are limited to the construction of dynamic channel simulation environment at a single frequency, a single link, or a single subsystem level. It is obviously difficult to build a full-link, full-frequency, full-scenario, and full-dynamic Beidou global system space environment channel simulation test environment, and it is difficult to meet the system equivalent dynamic operation docking test verification needs. Summary of the invention

[0008] Based on this, it is necessary to provide a Beidou global system full-link space environment channel simulation method and system that can build a full-link, full-frequency, full-scene, and full-dynamic test environment to address the above-mentioned technical problems.

[0009] A BeiDou global system full-link space environment channel simulation method is applied to the BeiDou global system full-link space environment channel simulation system. The BeiDou global system full-link space environment channel simulation system includes a channel scene configuration and operation control subsystem, a full-link space environment channel simulation subsystem and a channel simulation subsystem.

[0010] The method comprises:

[0011] The operation control parameters of the signal transceiver link are obtained, and the scene standard operation control information is set in the channel scene configuration and operation control subsystem according to the operation control parameters and the parameter information of the simulation object participating in the link information transmission and reception.

[0012] According to the scene standard operation control information, the channel model corresponding to the scene standard operation control information and the relative motion state of the simulation object, each link in the space environment channel is uniformly driven to obtain a set of link channel characteristic parameters. According to the set of link channel characteristic parameters, channel link simulation is performed in the full-link space environment channel simulation subsystem.

[0013] According to the channel characteristic simulation parameters and the channel link establishment relationship, the communication simulation of the simulation object corresponding to the channel link establishment relationship is completed in the channel simulation subsystem.

[0014] According to the reference clock of the Beidou global system full-link space environment channel simulation system, the channel scenario configuration and operation control subsystem, the full-link space environment channel simulation subsystem and the operation frequency information and time-frequency signals of the channel simulation subsystem are synchronized respectively to calibrate the scenario standard operation control information, channel link simulation and communication simulation of the full-link space environment channel.

[0015] In one embodiment, the channel link building relationship includes: an uplink injection channel link building relationship, an intersatellite link channel link building relationship, a downlink navigation channel link building relationship, a satellite-to-ground anchoring channel link building relationship, and a telemetry and remote control channel link building relationship. A channel link building subsystem is constructed according to the channel link building relationship. The channel link building subsystem includes: an uplink injection link channel simulation subsystem, an intersatellite link channel simulation subsystem, a downlink navigation link channel simulation subsystem, a satellite-to-ground anchoring link channel simulation subsystem, and a telemetry and remote control link channel simulation subsystem. The simulation objects include: Beidou satellites, ground receiving stations, injection stations, anchoring stations, telemetry and remote control stations, and navigation user equipment. The parameter information includes: the current orbit type, parameters, and starting information of the Beidou satellite, as well as the current geographic coordinate information of the ground receiving station, the current geographic coordinate information and motion status information of the navigation user equipment.

[0016] In one embodiment, it also includes: performing simulation operation of the Beidou global system according to the channel scenario configuration, calculating and generating dynamic parameters of the wireless signal transmission and reception channels between satellites, ground receiving stations, injection stations and navigation user equipment that are equivalent to the Beidou global system, and inputting the dynamic parameters into the full-link space environment channel simulation subsystem as information data driving each channel simulation link to obtain the operation control parameters of the signal transmission and reception link. The operation control parameters include: signal type, signal frequency, quantity number, link establishment status, time delay, frequency offset, power attenuation and phase change.

[0017] In one embodiment, the method further includes: setting a same space-time coordinate system according to the scene standard operation control information, associating parameter information of the simulation object in the space-time coordinate system, and obtaining the operation scene standard configuration. According to the operation scene standard configuration and the channel model corresponding to the scene standard operation control information, each link in the spatial environment channel is uniformly driven to obtain a link channel characteristic parameter set.

[0018] In one of the embodiments, an L-band multi-channel uplink injection RF signal is received in an uplink injection link channel simulation subsystem according to channel characteristic simulation parameters and an uplink injection channel link establishment relationship, multi-station to multi-satellite signal injection direction switching and digital signal distribution are performed according to the uplink injection RF signal, and uplink injection multi-channel parallel channel communication is simulated to restore and transmit the L-band multi-channel uplink injection RF signal, thereby completing the communication simulation of the link corresponding to the uplink injection channel link establishment relationship of the simulation object.

[0019] In one embodiment, according to the channel characteristic simulation parameters and the intersatellite link channel link establishment relationship, the Ka-band intersatellite link radio frequency signal is multi-channel down-converted to the L-band radio frequency frequency in the intersatellite link channel simulation subsystem, and the multi-channel L-band intersatellite link radio frequency signal is received. According to the L-band intersatellite link radio frequency signal, multi-satellite to multi-satellite signal time-sharing polling communication switching and digital signal distribution are performed, and the multi-channel parallel channel communication of the intersatellite link is simulated to recover and transmit the multi-channel L-band intersatellite link radio frequency signal, and the L-band multi-channel is up-converted to the Ka-band intersatellite link radio frequency signal, so as to complete the communication simulation of the link corresponding to the intersatellite link channel link establishment relationship of the simulation object.

[0020] In one of the embodiments, an L-band multi-frequency point multi-channel downlink navigation radio frequency signal is received in a downlink navigation link channel simulation subsystem according to channel characteristic simulation parameters and a downlink navigation channel link establishment relationship, and multi-satellite to multi-station satellite-to-ground navigation broadcast link establishment relationship switching and digital signal distribution are performed according to the downlink navigation radio frequency signal, and downlink navigation multi-channel parallel channel communication is simulated to restore and transmit the L-band multi-frequency point multi-channel downlink navigation radio frequency signal, thereby completing the communication simulation of the link corresponding to the downlink navigation channel link establishment relationship of the simulation object.

[0021] In one embodiment, according to the channel characteristic simulation parameters and the satellite-to-ground anchor channel link relationship, the Ka-band satellite-to-ground anchor radio frequency signal is multi-channel down-converted to the L-band radio frequency frequency in the satellite-to-ground anchor link channel simulation subsystem, and the multi-channel L-band satellite-to-ground anchor radio frequency signal is received. According to the L-band satellite-to-ground anchor radio frequency signal, multi-satellite-to-multi-station signal time-sharing polling communication switching and digital signal distribution are performed, and the satellite-to-ground anchor multi-channel parallel channel communication is simulated to restore and transmit the multi-channel L-band satellite-to-ground anchor radio frequency signal, and the L-band multi-channel is up-converted to the Ka-band satellite-to-ground anchor radio frequency signal, completing the communication simulation of the link corresponding to the satellite-to-ground anchor channel link relationship of the simulation object.

[0022] In one of the embodiments, an S-band telemetry and remote control multi-channel radio frequency signal is received in a telemetry and remote control link channel simulation subsystem according to channel characteristic simulation parameters and a telemetry and remote control channel link establishment relationship, and multi-station to multi-satellite signal telemetry and remote control uplink and downlink direction switching and digital signal distribution are performed according to the S-band telemetry and remote control multi-channel radio frequency signal, as well as simulated telemetry and remote control multi-channel parallel channel communication, so as to restore and transmit the S-band telemetry and remote control multi-channel radio frequency signal, and complete the communication simulation of the link corresponding to the telemetry and remote control channel link establishment relationship of the simulation object.

[0023] A Beidou global system full-link space environment channel simulation system, the system comprising:

[0024] The channel scenario configuration and operation control subsystem is used to obtain the operation control parameters of the signal transmission and reception link, and set the scenario standard operation control information in the channel scenario configuration and operation control subsystem according to the operation control parameters and the parameter information of the simulation object participating in the link information transmission and reception.

[0025] The full-link space environment channel simulation subsystem is used to uniformly drive each link in the space environment channel according to the scene standard operation control information, the channel model corresponding to the scene standard operation control information, and the relative motion state of the simulation object, obtain a set of link channel characteristic parameters, and perform channel link simulation in the full-link space environment channel simulation subsystem according to the set of link channel characteristic parameters.

[0026] The channel simulation subsystem is used to complete the communication simulation of the link corresponding to the channel link establishment relationship of the simulation object in the channel simulation subsystem according to the channel characteristic simulation parameters and the channel link establishment relationship.

[0027] The unified time and frequency driving subsystem is used to synchronize the operation and frequency information and time and frequency signals of the channel scenario configuration and operation control subsystem, the full-link space environment channel simulation subsystem and the channel simulation subsystem according to the reference clock of the Beidou global system full-link space environment channel simulation system, so as to calibrate the scenario standard operation control information, channel link simulation and communication simulation of the full-link space environment channel.

[0028] The above-mentioned Beidou global system full-link space environment channel simulation method and system, first, sets the detailed parameter information of the simulation object through the channel scene configuration and operation control subsystem, allowing the user to accurately set the objects participating in the simulation and their parameter information, ensuring the high consistency between the simulation environment and the real environment, as well as the full-link simulation from the satellite to the user terminal, including all links such as signal transmission, transmission, reflection and reception, covering the full frequency range of the Beidou system. The core of this step is to generate scene standard information under a unified space-time coordinate system, which can simulate the channel state under different geographical, climatic and electromagnetic environments. Such full-scene coverage ensures that the test environment can accurately reflect the working performance of the Beidou system in different regions and under different conditions around the world, and provide an accurate reference framework for subsequent simulation processes. Then, the full-link space environment channel simulation subsystem performs full-link simulation based on the above-mentioned scene standard information and the preset channel link building model, taking into account the relative motion state between the simulation objects. It not only includes static scene simulation, but also can reflect and adjust the simulation environment in real time to simulate the actual environment of satellites and users that changes dynamically. This process not only includes the direct channel simulation from satellite to ground users, but also covers complex channel environments such as reflections between satellites and ground reflections, so as to obtain the channel characteristic simulation parameters of each link. These parameters can fully reflect the performance of the channel under different conditions and provide detailed data support for various challenges that may be encountered during signal transmission. Finally, based on the channel characteristic simulation parameters, the channel simulation subsystem completes the dynamic real-time simulation of the simulation object in the full-link space environment channel. This step pays special attention to the real-time and dynamic adjustment capabilities during the simulation process, ensuring that the test environment can adapt to the complex requirements of the equivalent dynamic operation of the Beidou system. In this way, a test environment that can comprehensively and accurately reflect the operating status of the Beidou system under various conditions is constructed, which not only greatly improves the coverage and accuracy of the simulation test, but also greatly enhances the adaptability and practicality of the test environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 An application scenario of a Beidou global system full-link space environment channel simulation method in an embodiment

[0030] Figure 2 A schematic diagram of a flow chart of a Beidou global system full-link space environment channel simulation method in an embodiment;

[0031] Figure 3 A schematic diagram of implementing time-sharing polling switching of multi-satellite interconnection intersatellite link channel simulation signal streams in one embodiment;

[0032] Figure 4It is a schematic diagram of the implementation of multi-satellite multi-station downlink navigation channel simulation signal stream distribution and aggregation in one embodiment;

[0033] Figure 5 It is a structural block diagram of a Beidou global system full-link space environment channel simulation system in an embodiment;

[0034] Figure 6 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] The present invention provides a Beidou global system full-link space environment channel simulation method, which can be applied to Figure 1 The BeiDou global system full-link space environment channel simulation system shown in the figure. Among them, the BeiDou system is networked by dozens of satellites in orbit and dozens of ground receiving stations for satellite-ground integrated collaborative operation. The system includes multiple signal links such as uplink injection, inter-satellite link, downlink navigation, satellite-ground anchoring and telemetry and remote control, and has multiple frequency points in the L, S, C, Ka frequency bands. There are multiple types such as continuous broadcast, polling communication, point-to-point, many-to-many, etc., covering hundreds of channels such as satellite-ground uplink and downlink, and inter-satellite interconnection, which are interrelated, mutually restricted and mutually influenced. In order to test the comprehensive performance of the entire system under the actual operating state, an equivalent space dynamic signal propagation environment is constructed to simulate the changes in power, delay, phase, frequency and other characteristics caused by the propagation of different link signals in different space environment channels, so that the ground stationary satellites, ground receiving stations and navigation user equipment are equivalently involved in the real dynamic operation state of the system, so as to facilitate a more accurate evaluation of the compliance between the test results of each link and the design indicators.

[0037] The above system mainly includes the channel scenario configuration and operation control subsystem, the full-link space environment channel simulation subsystem, the time-frequency drive subsystem and the channel simulation subsystem. Among them, the channel simulation subsystem includes: uplink injection link channel simulation subsystem, intersatellite link channel simulation subsystem, downlink navigation link channel simulation subsystem, satellite-to-ground anchor link channel simulation subsystem, telemetry and remote control link channel simulation subsystem, etc.

[0038] In one embodiment, Figure 2 As shown, a BeiDou global system full-link space environment channel simulation method is provided, and the method is applied to Figure 1 The system in is taken as an example to illustrate, including the following steps:

[0039] Step 202, obtaining the operation control parameters of the signal transceiver link, and setting the scene standard operation control information in the channel scene configuration and operation control subsystem according to the operation control parameters and the parameter information of the simulation object participating in the link information transmission and reception.

[0040] Specifically, the operation scenario configuration control is unified through the channel scenario configuration and operation control subsystem, and the same space-time coordinate system is set. The initial positions, orbits, motion states, etc. of the equivalent dynamically operating satellites, ground receiving stations, injection stations, anchor stations, telemetry and remote control stations, and navigation user equipment are interconnected.

[0041] Furthermore, the space environment channel simulation is unified and full-link. According to the initial scenario configuration and the corresponding channel model, the relative motion states of satellites, ground receiving stations, injection stations, anchor stations, telemetry and remote control stations, and navigation user equipment participating in the equivalent dynamic operation within the Beidou system are simulated to obtain the change parameters of the channel characteristics of each link and ensure the close coupling of the space environment between the links.

[0042] Furthermore, the time-frequency drive operation is unified through the time-frequency drive subsystem, and according to the unified scheduling of the system operation control, the clock difference simulation, frequency adjustment, frequency allocation, time synchronization and other operations required for the system operation are performed to ensure the precise synchronization of the operation of each subsystem.

[0043] It is worth noting that the channel scenario configuration and operation control subsystem corresponds to the operation scenario setting and operation control of each signal transceiver link of the Beidou global system, including the current orbit type, orbit parameters and starting information of each Beidou satellite participating in the dynamic equivalent operation, the current geographic coordinate information of each ground receiving station, the current geographic coordinates of the navigation user equipment and the initial state information of the movement, etc., as well as the initial information configuration of the spatial environment characteristic model of various signal propagation channels matching the above. At the same time, it schedules the start and stop of various modules and the setting of various model parameters or attributes, and loads the initial operation. The main designs include:

[0044] Initial setup of full-link channel scenario;

[0045] Selection of channel characteristic models for each link;

[0046] System operation initialization and command control;

[0047] System operation status display and fault alarm.

[0048] In addition, the time and frequency drive subsystem is responsible for providing the time and frequency information required for the operation of the entire system based on its own reference hydrogen atomic clock, synchronously driving each subsystem to operate in an orderly manner, and also performing clock error simulation, frequency adjustment, frequency allocation, time synchronization and other operations according to the system operation requirements. The main design includes:

[0049] Precision frequency sources, such as high-stability hydrogen atomic clocks;

[0050] Clock error simulation, reflecting the clock error information between the satellite and the ground receiving station;

[0051] Frequency adjustment: continuous frequency adjustment as required;

[0052] Frequency distribution, providing clock frequency signals required by other devices in the system;

[0053] Time synchronization, keeping the time of all subsystems within the system synchronized.

[0054] Step 204, uniformly drive each link in the space environment channel according to the scene standard operation control information, the channel model corresponding to the scene standard operation control information, and the relative motion state of the simulation object, obtain a set of link channel characteristic parameters, and perform channel link simulation in the full-link space environment channel simulation subsystem according to the set of link channel characteristic parameters.

[0055] Specifically, the full-link space environment channel simulation subsystem performs simulation operations according to the channel scenario configuration, calculates and generates the dynamic parameters of the wireless signal transmission and reception channels between satellites, ground receiving stations, and ground equipment that are equivalent to the participating systems, including signal type, frequency, quantity, link establishment status, time delay, frequency offset, power attenuation, phase change, etc., as information data drivers for each channel simulation link. The main designs include:

[0056] Simulation and distribution of parameters associated with each link channel;

[0057] Uplink input channel characteristic simulation and real-time parameter calculation;

[0058] Intersatellite link channel characteristics simulation and real-time parameter calculation;

[0059] Downlink navigation channel characteristics simulation and real-time parameter calculation;

[0060] Satellite-to-ground anchor channel characteristics simulation and real-time parameter calculation;

[0061] Telemetry and telecontrol channel characteristics simulation and real-time parameter calculation.

[0062] Step 206, completing the communication simulation of the simulation object in the link corresponding to the channel link establishment relationship in the channel simulation subsystem according to the channel characteristic simulation parameters and the channel link establishment relationship.

[0063] Specifically, the uplink injection link channel simulation subsystem accesses the L-band uplink injection RF signal transmitted by the multi-channel injection station, completes the dynamic channel simulation of the spatial environment propagation of the multi-channel uplink injection signal during the period when multiple target satellites pass the injection station in the scene setting, dynamically adjusts the power, frequency, phase, delay and other characteristics of the multi-channel uplink injection signal, and realizes the switching of different ground receiving stations to different transit satellite signal pointing mapping according to the state parameters of the ground-satellite uplink unidirectional channel link establishment, and completes the RF signal injection satellite operation after adding channel characteristics. The main design includes:

[0064] Receive the scenario configuration parameters and operation control parameters related to the BeiDou global system uplink injection link channel operation sent by the channel scenario configuration and operation control subsystem;

[0065] Receive the power, frequency, phase, delay and other characteristic parameters of the Beidou global system uplink injection link channel operation related signals sent by the full-link space environment channel simulation subsystem;

[0066] Receive the time and frequency signals required for the operation of the BeiDou global system uplink injection link channel sent by the time and frequency driving subsystem;

[0067] L-band multi-channel uplink injection RF signal reception and sampling;

[0068] Multi-station to multi-satellite signal injection direction switching and digital signal distribution;

[0069] Simulation of uplink injection multi-channel parallel channel characteristics;

[0070] L-band multi-channel uplink injection RF signal recovery and transmission.

[0071] Furthermore, the intersatellite link channel simulation subsystem accesses the Ka-band intersatellite link radio frequency signals transmitted by multiple satellites, completes the dynamic channel simulation of the propagation of multiple intersatellite link signals in the space environment in the multi-satellite interconnection communication time slot set in the scene, dynamically adjusts the power, frequency, phase, delay and other characteristics of the multi-satellite link signals, and realizes the fast switching of the time-sharing polling link establishment direction of different satellite transmission signals to different satellite reception signals according to the multi-satellite-intersatellite bidirectional channel link establishment state parameters, such as Figure 3 As shown, the RF signal with additional channel characteristics is output to the target satellite. The main design includes:

[0072] Receive the scenario configuration parameters and operation control parameters related to the BeiDou global system intersatellite link channel operation sent by the channel scenario configuration and operation control subsystem;

[0073] Receive the power, frequency, phase, delay and other characteristic parameters of the Beidou global system intersatellite link channel operation related signals sent by the full-link space environment channel simulation subsystem;

[0074] Receive the time and frequency signals required for the operation of the Beidou global system intersatellite link channel sent by the time and frequency driving subsystem;

[0075] Multi-channel down-conversion of Ka-band intersatellite link radio frequency signals to L-band radio frequency frequencies;

[0076] Multi-channel L-band intersatellite link RF signal reception and sampling;

[0077] Multi-satellite to multi-satellite signal time-sharing polling communication switching and digital signal distribution;

[0078] Simulation of multi-channel parallel channel characteristics of intersatellite links;

[0079] Multi-channel L-band intersatellite link RF signal recovery and transmission;

[0080] L-band multi-channel up-conversion to Ka-band intersatellite link RF signal.

[0081] Furthermore, the downlink navigation link channel simulation subsystem accesses the downlink navigation radio frequency signals of multiple frequencies B1, B2, and B3 in the L-band transmitted by multiple satellites, and completes the dynamic channel simulation of the propagation of multiple downlink navigation signals in the space environment during the period when multiple satellites pass over the target ground receiving station in the scenario setting, dynamically adjusts the power, frequency, phase, delay and other characteristics of the multiple downlink navigation signals, and realizes the replication, distribution and pointing mapping switching of the signals received by different ground receiving stations by different satellites transmitting multiple frequency signals according to the downlink unidirectional channel link establishment state parameters of multi-satellite to multi-station multi-frequency signals, such as Figure 4 As shown, the RF signal with additional channel characteristics is output to the target ground receiving station. The main design includes:

[0082] Receive the scenario configuration parameters and operation control parameters related to the BeiDou global system downlink navigation link channel operation sent by the channel scenario configuration and operation control subsystem;

[0083] Receive the power, frequency, phase, delay and other characteristic parameters of the Beidou global system downlink navigation link channel operation related signals sent by the full-link space environment channel simulation subsystem;

[0084] Receive the time and frequency signals required for the operation of the Beidou global system downlink navigation link channel sent by the time and frequency driving subsystem;

[0085] L-band multi-frequency multi-channel downlink navigation RF signal reception and sampling;

[0086] Multi-satellite to multi-station satellite-to-ground navigation broadcasting link relationship switching and digital signal distribution;

[0087] Simulation of multi-channel parallel channel characteristics for downlink navigation;

[0088] L-band multi-frequency multi-channel downlink navigation RF signal recovery and transmission.

[0089] Furthermore, the satellite-to-ground anchor link channel simulation subsystem accesses the Ka-band intersatellite link RF signals transmitted by multiple satellites, completes the dynamic channel simulation of the propagation of multiple satellite-to-ground anchor signals in the space environment in the multi-satellite-to-ground communication time slots set in the scene, dynamically adjusts the power, frequency, phase, delay and other characteristics of multiple satellite-to-ground anchor signals, and realizes the satellite-to-ground bidirectional pointing switching of different satellite transmission signals to different anchor station receiving signals according to the satellite-to-ground downlink bidirectional channel link establishment state parameters, and completes the satellite RF signal output to the target anchor station after adding channel characteristics, and the anchor station RF signal output to the target satellite after adding channel characteristics. The main design includes:

[0090] Receive the scenario configuration parameters and operation control parameters related to the operation of the Beidou global system satellite-to-ground anchor link channel sent by the channel scenario configuration and operation control subsystem;

[0091] Receive the power, frequency, phase, delay and other characteristic parameters of the Beidou global system satellite-to-ground anchor link channel operation-related signals sent by the full-link space environment channel simulation subsystem;

[0092] Receive the time and frequency signals required for the operation of the Beidou global system satellite-to-ground anchor link channel sent by the time and frequency driving subsystem;

[0093] The Ka-band satellite-ground anchored RF signal is multi-channel down-converted to the L-band RF frequency;

[0094] Multi-channel L-band satellite-ground anchored RF signal reception and sampling;

[0095] Multi-satellite to multi-station signal time-sharing polling communication switching and digital signal distribution;

[0096] Simulation of satellite-to-ground anchored multi-channel parallel channel characteristics;

[0097] Multi-channel L-band satellite-to-ground anchor RF signal recovery and transmission;

[0098] L-band multi-channel up-conversion to Ka-band satellite-ground anchored RF signal.

[0099] Furthermore, the telemetry and remote control link channel simulation subsystem accesses the S-band telemetry and remote control radio frequency signals transmitted by multiple telemetry and remote control stations, and completes the dynamic channel simulation of the propagation of multi-channel telemetry and remote control signals in the space environment during the period when multiple satellites pass over the target telemetry and remote control station in the scene setting, dynamically adjusts the power, frequency, phase, delay and other characteristics of the multi-channel telemetry and remote control signals, and realizes the bidirectional uplink and downlink pointing switching of different telemetry and remote control station transmission signals to different satellite reception signals and different satellite transmission signals to different telemetry and remote control station reception signals according to the satellite-ground bidirectional uplink and downlink channel establishment state parameters, and completes the operation of outputting the telemetry and remote control station radio frequency signals after adding channel characteristics to the target satellite and the satellite radio frequency signals after adding channel characteristics to the target telemetry and remote control station. The main design includes:

[0100] Receive the scenario configuration parameters and operation control parameters related to the operation of the Beidou global system telemetry and remote control link channel sent by the channel scenario configuration and operation control subsystem;

[0101] Receive the power, frequency, phase, delay and other characteristic parameters of the Beidou global system telemetry and remote control link channel operation related signals sent by the full-link space environment channel simulation subsystem;

[0102] Receive the time and frequency signals required for the operation of the Beidou global system telemetry and remote control link channel sent by the time and frequency drive subsystem;

[0103] S-band telemetry and remote control multi-channel RF signal reception and sampling;

[0104] Multi-station to multi-satellite signal telemetry and remote control uplink and downlink pointing switching and digital signal distribution;

[0105] Simulation of multi-channel parallel channel characteristics of telemetry and remote control;

[0106] S-band telemetry and remote control multi-channel RF signal recovery and transmission.

[0107] Step 208, according to the Beidou global system full-link space environment channel simulation system's own reference clock, synchronize the channel scenario configuration and operation control subsystem, the full-link space environment channel simulation subsystem and the operation frequency information and time-frequency signals of the channel simulation subsystem, so as to calibrate the scenario standard operation control information, channel link simulation and communication simulation of the full-link space environment channel.

[0108] In the above-mentioned Beidou global system full-link space environment channel simulation method, first, the detailed parameter information of the simulation object is set through the channel scene configuration and operation control subsystem, allowing the user to accurately set the objects participating in the simulation and their parameter information, ensuring the high consistency between the simulation environment and the real environment, as well as the full-link simulation from the satellite to the user terminal, including all links such as signal transmission, transmission, reflection and reception, covering the full frequency range of the Beidou system. The core of this step is to generate scene standard information under a unified space-time coordinate system, which can simulate the channel state under different geographical, climatic and electromagnetic environments. Such full-scene coverage ensures that the test environment can accurately reflect the working performance of the Beidou system in different regions and under different conditions around the world, and provide an accurate reference framework for subsequent simulation processes. Then, the full-link space environment channel simulation subsystem performs full-link simulation based on the above-mentioned scene standard information and the preset channel link model, taking into account the relative motion state between the simulation objects. It not only includes static scene simulation, but also can reflect and adjust the simulation environment in real time to simulate the actual environment of satellites and users with dynamic changes. This process not only includes the direct channel simulation from satellite to ground users, but also covers complex channel environments such as reflections between satellites and ground reflections, so as to obtain the channel characteristic simulation parameters of each link. These parameters can fully reflect the performance of the channel under different conditions and provide detailed data support for various challenges that may be encountered during signal transmission. Finally, based on the channel characteristic simulation parameters, the channel simulation subsystem completes the dynamic real-time simulation of the simulation object in the full-link space environment channel. This step pays special attention to the real-time and dynamic adjustment capabilities during the simulation process, ensuring that the test environment can adapt to the complex requirements of the equivalent dynamic operation of the Beidou system. In this way, a test environment that can comprehensively and accurately reflect the operating status of the Beidou system under various conditions is constructed, which not only greatly improves the coverage and accuracy of the simulation test, but also greatly enhances the adaptability and practicality of the test environment.

[0109] In one embodiment, the channel link building relationship includes: an uplink injection channel link building relationship, an intersatellite link channel link building relationship, a downlink navigation channel link building relationship, a satellite-to-ground anchoring channel link building relationship, and a telemetry and remote control channel link building relationship. A channel link building subsystem is constructed according to the channel link building relationship. The channel link building subsystem includes: an uplink injection link channel simulation subsystem, an intersatellite link channel simulation subsystem, a downlink navigation link channel simulation subsystem, a satellite-to-ground anchoring link channel simulation subsystem, and a telemetry and remote control link channel simulation subsystem. The simulation objects include: Beidou satellites, ground receiving stations, injection stations, anchoring stations, telemetry and remote control stations, and navigation user equipment. The parameter information includes: the current orbit type, parameters, and starting information of the Beidou satellite, as well as the current geographic coordinate information of the ground receiving station, the current geographic coordinate information and motion status information of the navigation user equipment.

[0110] It is worth mentioning that the uplink injection link channel simulation subsystem supports the simulation of the uplink injection channel link establishment model. The injection station injects various parameters, control instructions and satellite-to-ground broadcast parameters required for the operation of the networking satellite to the overhead satellite through the L-band wireless RF signal. The channel characteristics simulate the main effects of the spatial unidirectional propagation environment such as the troposphere and rain attenuation.

[0111] The intersatellite link channel simulation subsystem supports the simulation of the intersatellite link channel establishment model. Networked satellites establish communication links with each other through a time-division system to transfer parameters and perform intersatellite ranging. The intersatellite link polling is performed through the Ka-band wireless RF signal. The channel characteristics simulate the influence of the main space two-way propagation environment such as the ionosphere, troposphere, and thin atmosphere.

[0112] The downlink navigation link channel simulation subsystem supports the simulation of the downlink navigation channel link establishment model. The satellite broadcasts the ephemeris, message, clock error parameters, etc. required for ground user navigation, positioning and timing, and downlinks navigation to ground receiving stations and users through L-band multi-frequency wireless RF signals. The channel characteristics simulate the main effects of the ionosphere, troposphere, multipath, rain attenuation, obstruction and other space and terrain one-way propagation environments.

[0113] The satellite-to-ground anchor link channel simulation subsystem supports the simulation of the satellite-to-ground anchor channel link establishment model. The anchor station transmits the parameters required for the operation of the networking satellite and the inter-satellite ranging, etc., through the satellite-to-ground anchor link polling and receiving of Ka-band wireless RF signals. The channel characteristics simulate the main effects of the two-way propagation environment of space and terrain, such as the ionosphere, troposphere, thin atmosphere, multipath, rain attenuation, and obstruction.

[0114] The telemetry and remote control link channel simulation subsystem supports the simulation of the telemetry and remote control channel link establishment model. The telemetry and remote control station transmits and receives the remote control parameters and telemetry information required for the operation of the networking satellite through the S-band wireless RF signal between the satellite and the ground in a two-way downlink manner. The channel characteristics simulate the main effects of the two-way propagation environment of space and terrain such as the ionosphere, troposphere, multipath, rain attenuation, and obstruction.

[0115] In one embodiment, the simulation operation of the BeiDou global system is performed according to the channel scenario configuration, and the dynamic parameters of the wireless signal transmission and reception channels between satellites, ground receiving stations, injection stations and navigation user equipment participating in the equivalent operation of the BeiDou global system are calculated and generated. The dynamic parameters are input into the full-link space environment channel simulation subsystem as information data driving the simulation link of each channel to obtain the operation control parameters of the signal transmission and reception link. The operation control parameters include: signal type, signal frequency, quantity number, link establishment status, time delay, frequency offset, power attenuation and phase change.

[0116] In one embodiment, the same space-time coordinate system is set according to the scene standard operation control information, and the parameter information of the simulation object is associated in the space-time coordinate system to obtain the operation scene standard configuration. According to the operation scene standard configuration and the channel model corresponding to the scene standard operation control information, each link in the spatial environment channel is uniformly driven to obtain a link channel characteristic parameter set.

[0117] In one of the embodiments, an L-band multi-channel uplink injection RF signal is received in an uplink injection link channel simulation subsystem according to channel characteristic simulation parameters and an uplink injection channel link establishment relationship, multi-station to multi-satellite signal injection direction switching and digital signal distribution are performed according to the uplink injection RF signal, and uplink injection multi-channel parallel channel communication is simulated to restore and transmit the L-band multi-channel uplink injection RF signal, thereby completing the communication simulation of the link corresponding to the uplink injection channel link establishment relationship of the simulation object.

[0118] In one embodiment, according to the channel characteristic simulation parameters and the intersatellite link channel link establishment relationship, the Ka-band intersatellite link radio frequency signal is multi-channel down-converted to the L-band radio frequency frequency in the intersatellite link channel simulation subsystem, and the multi-channel L-band intersatellite link radio frequency signal is received. According to the L-band intersatellite link radio frequency signal, multi-satellite to multi-satellite signal time-sharing polling communication switching and digital signal distribution are performed, and the multi-channel parallel channel communication of the intersatellite link is simulated to recover and transmit the multi-channel L-band intersatellite link radio frequency signal, and the L-band multi-channel is up-converted to the Ka-band intersatellite link radio frequency signal, so as to complete the communication simulation of the link corresponding to the intersatellite link channel link establishment relationship of the simulation object.

[0119] In one of the embodiments, an L-band multi-frequency point multi-channel downlink navigation radio frequency signal is received in a downlink navigation link channel simulation subsystem according to channel characteristic simulation parameters and a downlink navigation channel link establishment relationship, and multi-satellite to multi-station satellite-to-ground navigation broadcast link establishment relationship switching and digital signal distribution are performed according to the downlink navigation radio frequency signal, and downlink navigation multi-channel parallel channel communication is simulated to restore and transmit the L-band multi-frequency point multi-channel downlink navigation radio frequency signal, thereby completing the communication simulation of the link corresponding to the downlink navigation channel link establishment relationship of the simulation object.

[0120] In one embodiment, according to the channel characteristic simulation parameters and the satellite-to-ground anchor channel link relationship, the Ka-band satellite-to-ground anchor radio frequency signal is multi-channel down-converted to the L-band radio frequency frequency in the satellite-to-ground anchor link channel simulation subsystem, and the multi-channel L-band satellite-to-ground anchor radio frequency signal is received. According to the L-band satellite-to-ground anchor radio frequency signal, multi-satellite-to-multi-station signal time-sharing polling communication switching and digital signal distribution are performed, and the satellite-to-ground anchor multi-channel parallel channel communication is simulated to restore and transmit the multi-channel L-band satellite-to-ground anchor radio frequency signal, and the L-band multi-channel is up-converted to the Ka-band satellite-to-ground anchor radio frequency signal, completing the communication simulation of the link corresponding to the satellite-to-ground anchor channel link relationship of the simulation object.

[0121] In one of the embodiments, an S-band telemetry and remote control multi-channel radio frequency signal is received in a telemetry and remote control link channel simulation subsystem according to channel characteristic simulation parameters and a telemetry and remote control channel link establishment relationship, and multi-station to multi-satellite signal telemetry and remote control uplink and downlink direction switching and digital signal distribution are performed according to the S-band telemetry and remote control multi-channel radio frequency signal, as well as simulated telemetry and remote control multi-channel parallel channel communication, so as to restore and transmit the S-band telemetry and remote control multi-channel radio frequency signal, and complete the communication simulation of the link corresponding to the telemetry and remote control channel link establishment relationship of the simulation object.

[0122] In one embodiment, a step of simulating a BeiDou global system full-link space environment channel is provided, specifically comprising the following steps:

[0123] S1. Unify the operation scenario configuration of the BeiDou global system, set the initial position, orbit, motion status and other necessary parameter information of the satellites, ground receiving stations, injection stations, anchor stations, telemetry and remote control stations, and navigation user equipment that participate in the equivalent dynamic operation within the BeiDou system in the same space-time coordinate system, and ensure their mutual correlation within the same system;

[0124] S11, satellite scene configuration;

[0125] S12, various ground receiving stations, injection stations, anchoring stations, telemetry and remote control stations and other scene configurations;

[0126] S13, navigation user equipment scene configuration;

[0127] S14: Schedule the start and stop of various scenario configuration modules, complete the setting of various model parameters or attributes, and load the initial operation.

[0128] S2. Unified full-link space environment channel simulation: Based on the initial scenario configuration and the corresponding channel model, simulate the relative motion states of the satellites, ground receiving stations, injection stations, anchor stations, telemetry and remote control stations, and navigation user equipment participating in the equivalent dynamic operation within the Beidou system, obtain the channel characteristic change parameters of each link, and ensure the close coupling of the space environment between the links;

[0129] S21 simulation and distribution of parameters associated with each link channel;

[0130] S22 Uplink input channel characteristic simulation calculation and channel parameter distribution;

[0131] S23 intersatellite link channel characteristics simulation calculation and channel parameter distribution;

[0132] S24 downlink navigation channel characteristic simulation calculation and channel parameter distribution;

[0133] S25 satellite-to-ground anchor channel characteristics simulation calculation and channel parameter distribution;

[0134] S26 telemetry and remote control channel characteristic simulation calculation and channel parameter distribution.

[0135] S3, unify the time and frequency to drive the operation in an orderly manner, and perform the clock difference simulation, frequency adjustment, frequency allocation, time synchronization and other operations required for the system operation according to the unified scheduling of the system operation control, to ensure the precise synchronization of the operation of each subsystem;

[0136] S31 clock error simulation;

[0137] S32 frequency adjustment;

[0138] S33 Frequency allocation;

[0139] S34 time synchronization.

[0140] S4. According to the link establishment relationship of the uplink injection channel and the channel characteristic simulation parameters, the real-time switching of the one-way cross-pointing link of the wired RF signals between multiple uplink injection stations and multiple overhead satellites and the dynamic real-time simulation of multiple one-way L-band uplink injection space environment channels from multiple stations to multiple satellites are completed;

[0141] S41 adjusts the satellite pointing switching of the injection station according to the uplink injection channel link establishment relationship parameters, completes the channel switching of the sampled uplink injection signal in the digital domain, and ensures that its output is correctly mapped to the satellite receiving channel it points to;

[0142] S42 dynamically adjusts the corresponding signal delay, amplitude, phase, and frequency shift characteristics according to the uplink injection channel characteristic simulation parameters to complete real-time dynamic channel simulation.

[0143] S43 reallocates the input and output digital channel mapping relationship according to the real-time changes in the uplink injection link establishment relationship parameters, and adjusts the signal pointing of the injection station to the satellite. The change relationship switches slowly and is maintained for a relatively long time, so there is no need for frequent switching.

[0144] S5. According to the intersatellite link channel link establishment relationship and channel characteristic simulation parameters, complete the real-time switching of the two-way cross-pointing link of wired RF signals between multiple satellites and the dynamic real-time simulation of the space environment channel of multiple two-way Ka-band intersatellite links between multiple satellites;

[0145] S51 adjusts the direction switching between satellites according to the inter-satellite link channel establishment relationship parameters, completes channel switching of the sampled satellite transmission signal in the digital domain, and ensures that its output is correctly mapped to the satellite receiving channel it points to;

[0146] S52 dynamically adjusts the corresponding signal delay, amplitude, phase, and frequency shift characteristics according to the intersatellite link channel characteristic simulation parameters to complete real-time dynamic channel simulation;

[0147] S53 reallocates the input and output digital channel mapping relationship and adjusts the bidirectional signal direction between satellites according to the real-time changes of the inter-satellite link establishment relationship parameters. The changing relationship switches quickly and is maintained for a relatively short time, requiring frequent and rapid switching.

[0148] S6. According to the downlink navigation channel link establishment relationship and channel characteristic simulation parameters, complete the real-time switching of multi-frequency wired RF signal unidirectional cross-pointing links of multiple over-the-head satellites to multiple ground receiving stations and navigation user equipment, and the dynamic real-time simulation of multi-frequency multi-channel unidirectional L-band downlink navigation space environment channels of multiple satellites to multiple stations;

[0149] S61 adjusts the direction switching of the satellite to the ground receiving station and the navigation user equipment according to the downlink navigation channel link establishment relationship parameters, completes the channel switching of the sampled downlink navigation signal in the digital domain, and ensures that its output is correctly mapped to the satellite receiving channel it points to;

[0150] S62 dynamically adjusts the corresponding signal delay, amplitude, phase, and frequency shift characteristics according to the downlink navigation channel characteristic simulation parameters to complete real-time dynamic channel simulation;

[0151] S63 reallocates the input and output digital channel mapping relationship of the next time slot according to the real-time change of the link establishment relationship parameters, and adjusts the signal pointing of the satellite to the ground receiving station. The change relationship switches slowly and maintains for a relatively long time, so there is no need for frequent switching.

[0152] S7. According to the satellite-to-ground anchor channel link establishment relationship and channel characteristic simulation parameters, complete the real-time switching of the two-way cross-pointing link of wired RF signals from multiple overhead satellites to multiple anchor stations, and the dynamic real-time simulation of multiple two-way Ka-band satellite-to-ground anchor space environment channels from multiple satellites to multiple stations;

[0153] S71 adjusts the bidirectional pointing switching between the anchor and the satellite according to the satellite-to-ground anchor channel link establishment relationship parameters, completes channel switching of the sampled satellite-to-ground anchor signal in the digital domain, and ensures that its output is correctly mapped to the satellite receiving channel it points to, and completes channel switching of the sampled satellite signal in the digital domain, and ensures that its output is correctly mapped to the satellite receiving channel it points to;

[0154] S72 dynamically adjusts the corresponding signal delay, amplitude, phase, and frequency shift characteristics according to the satellite-to-ground anchor channel characteristic simulation parameters to complete real-time dynamic channel simulation.

[0155] S73 reallocates the input and output digital channel mapping relationship of the next time slot according to the real-time changes of the link establishment relationship parameters, and adjusts the bidirectional signal direction between the anchor and the satellite. The change relationship switches quickly and is maintained for a relatively short time, requiring frequent and rapid switching.

[0156] S8. According to the link-building relationship of telemetry and remote control channels and the simulation parameters of channel characteristics, the real-time switching of the two-way cross-pointing links of wired RF signals between multiple telemetry and remote control stations and multiple overhead satellites, and the dynamic real-time simulation of multiple two-way S-band telemetry and remote control space environment channels from multiple stations to multiple satellites are completed;

[0157] S81 adjusts the direction switching between the telemetry and remote control station and the satellite according to the telemetry and remote control channel link establishment relationship parameters, completes channel switching of the sampled telemetry and remote control signal in the digital domain, and ensures that its output is correctly mapped to the satellite receiving channel it points to, and completes channel switching of the sampled satellite signal in the digital domain, and ensures that its output is correctly mapped to the telemetry and remote control receiving channel it points to;

[0158] S82 dynamically adjusts the corresponding signal delay, amplitude, phase, and frequency shift characteristics according to the simulation parameters of the telemetry and remote control channel characteristics to complete real-time dynamic channel simulation;

[0159] S83 reallocates the input and output digital channel mapping relationship of the next time slot according to the real-time changes of the link establishment relationship parameters, and adjusts the bidirectional signal direction between the telemetry and remote control station and the satellite. The changing relationship switches slowly and is maintained for a relatively long time, so there is no need for frequent switching.

[0160] It should be understood that although Figure 2 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 2At least part of the steps may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least part of the sub-steps or stages of other steps.

[0161] In one embodiment, Figure 5 As shown, a BeiDou global system full-link space environment channel simulation system is provided, including: a channel scenario configuration and operation control subsystem 502, a full-link space environment channel simulation subsystem 504, a channel simulation subsystem 506 and a unified time and frequency driving subsystem 508, wherein:

[0162] The channel scenario configuration and operation control subsystem 502 is used to obtain the operation control parameters of the signal transceiver link, and set the scenario standard operation control information in the channel scenario configuration and operation control subsystem according to the operation control parameters and the parameter information of the simulation object participating in the link information transmission and reception.

[0163] The full-link space environment channel simulation subsystem 504 is used to uniformly drive each link in the space environment channel according to the scene standard operation control information, the channel model corresponding to the scene standard operation control information, and the relative motion state of the simulation object, obtain a set of link channel characteristic parameters, and perform channel link simulation in the full-link space environment channel simulation subsystem according to the set of link channel characteristic parameters.

[0164] The channel simulation subsystem 506 is used to complete the communication simulation of the link corresponding to the channel link establishment relationship of the simulation object in the channel simulation subsystem according to the channel characteristic simulation parameters and the channel link establishment relationship.

[0165] The unified time and frequency driving subsystem 508 is used to synchronize the operation and frequency information and time and frequency signals of the channel scenario configuration and operation control subsystem, the full-link space environment channel simulation subsystem and the channel simulation subsystem according to the reference clock of the Beidou global system full-link space environment channel simulation system, so as to calibrate the scenario standard operation control information, channel link simulation and communication simulation of the full-link space environment channel.

[0166] For the specific definition of a Beidou global system full-link space environment channel simulation system, please refer to the definition of a Beidou global system full-link space environment channel simulation method mentioned above, which will not be repeated here. Each module in the above-mentioned Beidou global system full-link space environment channel simulation system can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0167] In one embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as follows: Figure 6 As shown. The computer device includes a processor, a memory, a network interface, a display screen and an input system connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for simulating a full-link space environment channel of the Beidou global system is implemented. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input system of the computer device can be a touch layer covered on the display screen, or a button, trackball or touchpad set on the computer device housing, or an external keyboard, touchpad or mouse, etc.

[0168] Those skilled in the art will understand that Figure 5-6 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present invention, and does not constitute a limitation on the computer device to which the solution of the present invention is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0169] In one embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0170] The operation control parameters of the signal transceiver link are obtained, and the scene standard operation control information is set in the channel scene configuration and operation control subsystem according to the operation control parameters and the parameter information of the simulation object participating in the link information transmission and reception.

[0171] According to the scene standard operation control information, the channel model corresponding to the scene standard operation control information and the relative motion state of the simulation object, each link in the space environment channel is uniformly driven to obtain a set of link channel characteristic parameters. According to the set of link channel characteristic parameters, channel link simulation is performed in the full-link space environment channel simulation subsystem.

[0172] According to the channel characteristic simulation parameters and the channel link establishment relationship, the communication simulation of the simulation object corresponding to the channel link establishment relationship is completed in the channel simulation subsystem.

[0173] According to the reference clock of the Beidou global system full-link space environment channel simulation system, the channel scenario configuration and operation control subsystem, the full-link space environment channel simulation subsystem and the operation frequency information and time-frequency signals of the channel simulation subsystem are synchronized respectively to calibrate the scenario standard operation control information, channel link simulation and communication simulation of the full-link space environment channel.

[0174] In one embodiment, a computer readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

[0175] The operation control parameters of the signal transceiver link are obtained, and the scene standard operation control information is set in the channel scene configuration and operation control subsystem according to the operation control parameters and the parameter information of the simulation object participating in the link information transmission and reception.

[0176] According to the scene standard operation control information, the channel model corresponding to the scene standard operation control information and the relative motion state of the simulation object, each link in the space environment channel is uniformly driven to obtain a set of link channel characteristic parameters. According to the set of link channel characteristic parameters, channel link simulation is performed in the full-link space environment channel simulation subsystem.

[0177] According to the channel characteristic simulation parameters and the channel link establishment relationship, the communication simulation of the simulation object corresponding to the channel link establishment relationship is completed in the channel simulation subsystem.

[0178] According to the reference clock of the Beidou global system full-link space environment channel simulation system, the channel scenario configuration and operation control subsystem, the full-link space environment channel simulation subsystem and the operation frequency information and time-frequency signals of the channel simulation subsystem are synchronized respectively to calibrate the scenario standard operation control information, channel link simulation and communication simulation of the full-link space environment channel.

[0179] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided by the present invention can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0180] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0181] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A BeiDou global system full-link space environment channel simulation method, characterized in that: Applied to the BeiDou global system full-link space environment channel simulation system, the BeiDou global system full-link space environment channel simulation system includes a channel scenario configuration and operation control subsystem, a full-link space environment channel simulation subsystem and a channel simulation subsystem; The method comprises: Acquire operation control parameters of the signal transceiver link, and set the scene standard operation control information in the channel scene configuration and operation control subsystem according to the operation control parameters and parameter information of the simulation object participating in the link information transmission and reception; Uniformly drive each link in the space environment channel according to the scenario standard operation control information, the channel model corresponding to the scenario standard operation control information, and the relative motion state of the simulation object to obtain a link channel characteristic parameter set, and perform channel link simulation in the full-link space environment channel simulation subsystem according to the link channel characteristic parameter set; According to the channel characteristic simulation parameters and the channel link establishment relationship, the communication simulation of the link corresponding to the channel link establishment relationship of the simulation object is completed in the channel simulation subsystem; According to the Beidou global system full-link space environment channel simulation system's own reference clock, the channel scenario configuration and operation control subsystem, the full-link space environment channel simulation subsystem and the operation frequency information and time-frequency signals of the channel simulation subsystem are synchronized respectively to calibrate the scenario standard operation control information of the full-link space environment channel, the channel link simulation and the communication simulation.

2. The method according to claim 1, characterized in that The channel linking relationship includes: an uplink injection channel linking relationship, an inter-satellite link channel linking relationship, a downlink navigation channel linking relationship, a satellite-to-ground anchor channel linking relationship, and a telemetry and remote control channel linking relationship; Construct a channel link building subsystem according to the channel link building relationship; the channel link building subsystem includes: an uplink injection link channel simulation subsystem, an intersatellite link channel simulation subsystem, a downlink navigation link channel simulation subsystem, a satellite-to-ground anchor link channel simulation subsystem and a telemetry and remote control link channel simulation subsystem; The simulation objects include: Beidou satellite, ground receiving station, injection station, anchor station, telemetry and remote control station and navigation user equipment; The parameter information includes: the current orbit type, parameters and starting information of the Beidou satellite, the current geographic coordinate information of the ground receiving station, and the current geographic coordinate information and motion status information of the navigation user equipment.

3. The method according to claim 2, characterized in that Obtain the operation control parameters of the signal transceiver link, including: Perform simulation operation of the BeiDou global system according to the channel scenario configuration, calculate and generate dynamic parameters of the wireless signal transmission and reception channels between satellites, ground receiving stations, injection stations and navigation user equipment participating in the equivalent operation of the BeiDou global system, and input the dynamic parameters into the full-link space environment channel simulation subsystem as information data driving the simulation link of each channel to obtain the operation control parameters of the signal transmission and reception link; The operation control parameters include: signal type, signal frequency, quantity number, link establishment status, time delay, frequency offset, power attenuation and phase change.

4. The method according to claim 3, characterized in that Uniformly driving each link in the space environment channel according to the scene standard operation control information, the channel model corresponding to the scene standard operation control information, and the relative motion state of the simulation object to obtain a link channel characteristic parameter set, and performing channel link simulation in the full-link space environment channel simulation subsystem according to the link channel characteristic parameter set, including: According to the scene standard operation control information, a same time-space coordinate system is set, and parameter information of the simulation object is associated in the time-space coordinate system to obtain a standard configuration of the operation scene; According to the operation scenario standard configuration, a channel model corresponding to the scenario standard operation control information is uniformly driven to drive each link in the spatial environment channel to obtain a link channel characteristic parameter set.

5. The method according to claim 4, characterized in that The communication simulation of the link corresponding to the channel link establishment relationship of the simulation object is completed in the channel simulation subsystem according to the channel characteristic simulation parameter and the channel link establishment relationship, including: According to the channel characteristic simulation parameters and the uplink injection channel link establishment relationship, an L-band multi-channel uplink injection radio frequency signal is received in the uplink injection link channel simulation subsystem, and multi-station to multi-satellite signal injection direction switching and digital signal distribution are performed according to the uplink injection radio frequency signal, and uplink injection multi-channel parallel channel communication is simulated to restore and transmit the L-band multi-channel uplink injection radio frequency signal, and complete the communication simulation of the link corresponding to the uplink injection channel link establishment relationship of the simulation object.

6. The method according to claim 4, characterized in that The communication simulation of the link corresponding to the channel link establishment relationship of the simulation object is completed in the channel simulation subsystem according to the channel characteristic simulation parameter and the channel link establishment relationship, including: Down-converting the Ka-band intersatellite link radio frequency signal to an L-band radio frequency in the intersatellite link channel simulation subsystem according to the channel characteristic simulation parameters and the intersatellite link channel link establishment relationship, and receiving the multi-channel L-band intersatellite link radio frequency signal; According to the L-band intersatellite link radio frequency signal, multi-satellite to multi-satellite signal time-sharing polling communication switching and digital signal distribution are performed, as well as multi-channel parallel channel communication of the simulated intersatellite link, so as to recover and transmit the multi-channel L-band intersatellite link radio frequency signal, and at the same time up-convert the L-band multi-channel to the Ka-band intersatellite link radio frequency signal, so as to complete the communication simulation of the link corresponding to the link establishment relationship of the simulation object in the intersatellite link channel.

7. The method according to claim 4, characterized in that The communication simulation of the link corresponding to the channel link establishment relationship of the simulation object is completed in the channel simulation subsystem according to the channel characteristic simulation parameter and the channel link establishment relationship, including: According to the channel characteristic simulation parameters and the downlink navigation channel link establishment relationship, the L-band multi-frequency point multi-channel downlink navigation radio frequency signal is received in the downlink navigation link channel simulation subsystem, and according to the downlink navigation radio frequency signal, multi-satellite to multi-station satellite-to-ground navigation broadcast link establishment relationship switching and digital signal distribution are performed, and downlink navigation multi-channel parallel channel communication is simulated to restore and transmit the L-band multi-frequency point multi-channel downlink navigation radio frequency signal, and complete the communication simulation of the link corresponding to the downlink navigation channel link establishment relationship of the simulation object.

8. The method according to claim 5, characterized in that The communication simulation of the link corresponding to the channel link establishment relationship of the simulation object is completed in the channel simulation subsystem according to the channel characteristic simulation parameter and the channel link establishment relationship, including: According to the channel characteristic simulation parameters and the satellite-to-ground anchor channel link establishment relationship, in the satellite-to-ground anchor link channel simulation subsystem, multi-channel down-converting of the Ka-band satellite-to-ground anchor radio frequency signal to an L-band radio frequency frequency, and receiving a multi-channel L-band satellite-to-ground anchor radio frequency signal; According to the L-band satellite-to-ground anchoring radio frequency signal, multi-satellite-to-multi-station signal time-sharing polling communication switching and digital signal distribution are performed, as well as simulated satellite-to-ground anchoring multi-channel parallel channel communication, so as to recover and transmit multi-channel L-band satellite-to-ground anchoring radio frequency signals, and at the same time up-convert the L-band multi-channel to the Ka-band satellite-to-ground anchoring radio frequency signal, so as to complete the communication simulation of the link corresponding to the link establishment relationship of the simulation object in the satellite-to-ground anchoring channel.

9. The method according to claim 5, characterized in that The communication simulation of the link corresponding to the channel link establishment relationship of the simulation object is completed in the channel simulation subsystem according to the channel characteristic simulation parameter and the channel link establishment relationship, including: According to the channel characteristic simulation parameters and the telemetry and remote control channel link establishment relationship, the S-band telemetry and remote control multi-channel radio frequency signal is received in the telemetry and remote control link channel simulation subsystem, and according to the S-band telemetry and remote control multi-channel radio frequency signal, multi-station to multi-satellite signal telemetry and remote control uplink and downlink direction switching and digital signal distribution are performed, as well as simulated telemetry and remote control multi-channel parallel channel communication, so as to restore and transmit the S-band telemetry and remote control multi-channel radio frequency signal, and complete the communication simulation of the link corresponding to the telemetry and remote control channel link establishment relationship of the simulation object.

10. A BeiDou global system full-link space environment channel simulation system, characterized in that: The system comprises: The channel scenario configuration and operation control subsystem is used to obtain the operation control parameters of the signal transceiver link, and set the scenario standard operation control information in the channel scenario configuration and operation control subsystem according to the operation control parameters and the parameter information of the simulation object participating in the link information transmission and reception; A full-link space environment channel simulation subsystem, used to uniformly drive each link in the space environment channel according to the scenario standard operation control information, the channel model corresponding to the scenario standard operation control information, and the relative motion state of the simulation object, to obtain a link channel characteristic parameter set, and to perform channel link simulation in the full-link space environment channel simulation subsystem according to the link channel characteristic parameter set; A channel simulation subsystem, configured to complete the communication simulation of the link corresponding to the channel link establishment relationship of the simulation object in the channel simulation subsystem according to the channel characteristic simulation parameters and the channel link establishment relationship; A unified time-frequency driving subsystem is used to synchronize the channel scenario configuration and operation control subsystem, the full-link space environment channel simulation subsystem and the operation frequency information and time-frequency signals of the channel simulation subsystem according to the own reference clock of the Beidou global system full-link space environment channel simulation system, so as to calibrate the scenario standard operation control information of the full-link space environment channel, the channel link simulation and the communication simulation.

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