A BeiDou global system full-link space environment channel simulation method and system

Abstract

The present invention relates to a method and system for simulating the full-link space environment channel of the Beidou global system. The method comprises: obtaining the operation control parameters of the signal transceiver link, and setting the scene standard operation control information according to the operation control parameters and the parameter information of the simulation object participating in the link information transmission and reception. 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 for simulation, and the communication simulation of the simulation object in the link corresponding to the channel link relationship is completed according to the channel characteristic simulation parameters and the channel link relationship. The operation frequency information and time-frequency signals of all subsystems in the synchronization system are used to calibrate the scene standard operation control information, channel link simulation and communication simulation of the full-link space environment channel. The present method can flexibly implement the channel simulation capabilities of full-link, full-frequency, full-scene and full-dynamic.

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 composed of dozens of in-orbit satellites, dozens of ground receiving stations, injection stations and other networks, which operate in an integrated satellite-ground collaborative manner 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. It has multiple frequency points in the L, S, C, Ka frequency bands, and various types of communication such as continuous broadcast and polling. It covers hundreds of channels such as satellite-ground uplink and downlink, and inter-satellite interconnection, which are interconnected, mutually restricted and influence each other. For wireless signal reception and transmission, the traditional wired docking 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 existing technology, a Chinese invention patent (application publication number: CN 111628814 B) was found. The invention is named as 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 to simulate the signal domain channel, 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), entitled Intersatellite link simulation device and method for deep space communication, only considers 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), entitled "Large-Scale MIMO Channel Simulation Method and Apparatus Based on Optical Matrix Switching," addresses the need for centralized and distributed deployment of various devices within a MIMO channel simulation system, as well as the need for large-scale parallel expansion of the number of input and output links. This patent innovatively utilizes a novel optical matrix switching system architecture, interconnecting subsystems with various optical fiber connections to transmit high-speed data signals, communication information, control commands, frequency, pulse, and time signals. This enables centralized and distributed deployment and large-scale parallel expansion of the MIMO channel simulation system.

[0006] However, the Chinese invention patent (application publication number: CN 114374451 B), titled "Large-Scale MIMO Channel Simulation Method and Apparatus Based on Optical Matrix Switching," only implements the architecture design of a large-scale, long-distance distributed channel simulation system from the perspective of supporting MIMO multi-channel simulation. It does not fully consider the differences in channel characteristics and simulation implementation in different channel environment scenarios for different frequency bands, and is not suitable for the specific various types of link characteristic simulation required for the full-link space environment channel simulation of the Beidou global system.

[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 the level of a single frequency point, a single link, and a single subsystem. It is obviously difficult to build a full-link, full-frequency point, full-scene, 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 requirements. 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 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 scenario 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 scenario standard operation control information is set in the channel scenario configuration and operation control subsystem according to the operation control parameters and the parameter information of the simulation objects participating in the link information transmission and reception.

[0012] 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, 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 in the link 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 operation frequency information and time-frequency signals of the channel scenario configuration and operation control subsystem, the full-link space environment channel simulation subsystem and 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 establishment relationships include: an uplink injection channel link establishment relationship, an intersatellite link channel link establishment relationship, a downlink navigation channel link establishment relationship, a satellite-to-ground anchor channel link establishment relationship, and a telemetry and remote control channel link establishment relationship. A channel link establishment subsystem is constructed based on the channel link establishment relationships. The channel link establishment 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. Simulation objects include: Beidou satellites, ground receiving stations, injection stations, anchor stations, telemetry and remote control stations, and navigation user equipment. 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.

[0016] In one embodiment, the system further includes: performing a simulation of the BeiDou global system based on 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 participating in equivalent operation of the BeiDou global system. The dynamic parameters are input into the full-link space environment channel simulation subsystem as information data to drive the simulated links of each channel, thereby obtaining the operational control parameters of the signal transmission and reception links. The operational 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: establishing a common spatiotemporal coordinate system based on the scenario standard operation control information, associating parameter information of the simulation object in the spatiotemporal coordinate system, and obtaining a standard configuration for the operation scenario. Each link in the spatial environment channel is uniformly driven based on the channel model corresponding to the standard configuration for the operation scenario and the scenario standard operation control information, thereby obtaining a set of link channel characteristic parameters.

[0018] In one embodiment, an L-band multi-channel uplink injection RF signal is received in an uplink injection link channel simulation subsystem according to the channel characteristic simulation parameters and the uplink injection channel link establishment relationship, and 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, based on channel characteristic simulation parameters and the intersatellite link channel establishment relationship, the intersatellite link channel simulation subsystem performs multi-channel down-conversion of Ka-band intersatellite link radio frequency signals to L-band radio frequency frequencies, and receives multi-channel L-band intersatellite link radio frequency signals. Based on the L-band intersatellite link radio frequency signals, multi-satellite-to-multi-satellite signal time-sharing polling communication switching and digital signal distribution are performed, and multi-channel parallel channel communication of the intersatellite link is simulated to recover and transmit the multi-channel L-band intersatellite link radio frequency signals. Simultaneously, the L-band multi-channel signals are up-converted to Ka-band intersatellite link radio frequency signals, completing the communication simulation of the link corresponding to the intersatellite link channel establishment relationship of the simulation object.

[0020] In one embodiment, 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 the channel characteristic simulation parameters and the 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, based on channel characteristic simulation parameters and the satellite-to-ground anchor channel link establishment relationship, a satellite-to-ground anchor link channel simulation subsystem performs multi-channel down-conversion of Ka-band satellite-to-ground anchor radio frequency signals to L-band radio frequency frequencies, and receives multi-channel L-band satellite-to-ground anchor radio frequency signals. Based on the L-band satellite-to-ground anchor radio frequency signals, multi-satellite-to-multi-station signal time-sharing polling communication switching and digital signal distribution are performed, and satellite-to-ground anchor multi-channel parallel channel communication is simulated to recover and transmit multi-channel L-band satellite-to-ground anchor radio frequency signals. Simultaneously, the L-band multi-channel signals are up-converted to Ka-band satellite-to-ground anchor radio frequency signals, completing the communication simulation of the link corresponding to the satellite-to-ground anchor channel link establishment relationship of the simulation object.

[0022] In one embodiment, 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. 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, and telemetry and remote control multi-channel parallel channel communication is simulated to restore and transmit the S-band telemetry and remote control multi-channel radio frequency signal, thereby completing 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 objects 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 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, 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 link channel characteristic parameter set.

[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-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 BeiDou global system full-link space environment channel simulation method and system first sets detailed parameter information for the simulation objects through the channel scenario configuration and operation control subsystem, allowing users to precisely set the objects involved in the simulation and their parameter information. This ensures high consistency between the simulated environment and the real environment. The full-link simulation from satellite to user terminal encompasses all aspects of the signal transmission, transmission, reflection, and reception, covering the full frequency range of the BeiDou system. The core of this step is to generate scenario standard information in a unified space-time coordinate system that can simulate channel conditions under different geographical, climatic, and electromagnetic environments. This full-scene coverage ensures that the test environment accurately reflects the BeiDou system's performance in different regions and conditions around the world, providing an accurate reference framework for subsequent simulation processes. The full-link space environment channel simulation subsystem then performs full-link simulation based on this scenario standard information and a preset channel link establishment model, taking into account the relative motion between the simulation objects. This not only includes static scenario simulation but also enables real-time reflection and adjustment of the simulation environment to simulate the dynamic and changing real-world environment of satellites and users. This process not only includes direct channel simulation from satellite to ground users, but also encompasses complex channel environments such as those between satellites and ground reflections, thereby obtaining channel characteristic simulation parameters for each link. These parameters can comprehensively reflect the channel's performance under different conditions, providing 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 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 of the simulation process, ensuring that the test environment can adapt to the complex requirements of the Beidou system's equivalent dynamic operation. This has created a test environment that can comprehensively and accurately reflect the operating status of the Beidou system under various conditions. This not only significantly improves the coverage and accuracy of simulation tests, 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 one embodiment

[0030] Figure 2 1. A schematic flow chart of a BeiDou global system full-link space environment channel simulation method according to an embodiment;

[0031] Figure 3 A schematic diagram of an implementation of time-sharing polling switching of analog signal streams of multi-satellite interconnected intersatellite link channels in one embodiment;

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

[0033] Figure 5 This is a structural block diagram of a BeiDou global system full-link space environment channel simulation system in one embodiment;

[0034] Figure 6 FIG. 1 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to 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. The BeiDou system consists of dozens of in-orbit satellites and dozens of ground receiving stations, operating in a satellite-ground integrated collaborative network. The system includes multiple signal links, including uplink injection, inter-satellite links, downlink navigation, satellite-ground anchoring, and telemetry and remote control. It utilizes multiple frequency bands in the L, S, C, and Ka bands, and employs various communication types, including continuous broadcast, polling, point-to-point, and many-to-many. It encompasses hundreds of channels, including satellite-ground downlink and inter-satellite interconnections, which are interconnected, constrained, and mutually influenced. To test the comprehensive performance of the entire system under real-world operating conditions, an equivalent dynamic signal propagation environment was constructed to simulate the changes in power, delay, phase, and frequency characteristics of different link signals propagating in different space environment channels. This allows the geostationary satellites, ground receiving stations, and navigation user equipment to participate in the system's real-world dynamic operation, facilitating a more accurate assessment of the conformance of each link's test results with design specifications.

[0037] The above-mentioned 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: the uplink injection link channel simulation subsystem, the inter-satellite link channel simulation subsystem, the downlink navigation link channel simulation subsystem, the satellite-to-ground anchor link channel simulation subsystem, and the telemetry and remote control link channel simulation subsystem.

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

[0039] Step 202: Acquire 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 parameter information of the simulation objects 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 channel characteristic change parameters 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. 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 and initial motion state information of the navigation user equipment, etc., as well as the initial information configuration of the spatial environment characteristic model of various signal propagation channels that match the above. At the same time, it schedules the start and stop of various modules and the setting of various model parameters or properties, and loads the initial operation. The main design includes:

[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 the orderly operation of each subsystem, 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 needed;

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

[0053] Time synchronization: keep all subsystems in the system synchronized.

[0054] In step 204, each link in the space environment channel is uniformly driven 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 set of link channel characteristic parameters, and channel link simulation is performed 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 based on the channel scenario configuration, and 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., which serve as the information data driver for each channel simulation link. The main design includes:

[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 characteristic simulation and real-time parameter calculation;

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

[0061] Telemetry and telecontrol channel characteristic 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. During the period when multiple target satellites pass over the injection station in the scenario setting, it completes the dynamic channel simulation of the spatial environment propagation of the multi-channel uplink injection signal, dynamically adjusts the power, frequency, phase, delay and other characteristics of the multi-channel uplink injection signal, and realizes the switching of the pointing mapping of different ground receiving stations to different passing satellite signals according to the state parameters of the ground-satellite uplink unidirectional channel link establishment, and completes the operation of injecting RF signals into the satellite after adding channel characteristics. The main design includes:

[0064] Receive the BeiDou global system uplink injection link channel operation-related scenario configuration parameters and operation control parameters 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 scenario, dynamically adjusts the power, frequency, phase, delay and other characteristics of the multiple intersatellite link signals, and realizes the time-sharing polling link establishment direction fast switching 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 in the figure, the RF signal with additional channel characteristics is output to the target satellite. The main design includes:

[0072] Receive the BeiDou global system intersatellite link channel operation-related scenario configuration parameters and operation control parameters 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 frequency points B1, B2, and B3 in the L band transmitted by multiple satellites. During the period when multiple satellites pass over the target ground receiving station in the scenario setting, it completes the dynamic channel simulation of the spatial environment propagation of multiple downlink navigation signals, 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 from multiple satellites transmitting multiple frequency point signals according to the downlink unidirectional channel link establishment state parameters of multiple satellites to multiple stations. Figure 4 As shown in the figure, the RF signal with additional channel characteristics is output to the target ground receiving station. The main design includes:

[0082] Receive the BeiDou global system downlink navigation link channel operation-related scenario configuration parameters and operation control parameters 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 drive 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 broadcast link relationship switching and digital signal distribution;

[0087] Downlink navigation multi-channel parallel channel characteristic simulation;

[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 inter-satellite link radio frequency signals transmitted by multiple satellites, and 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 scenario. It dynamically adjusts the power, frequency, phase, delay and other characteristics of the 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 based on the satellite-to-ground downlink and downlink bidirectional channel establishment state parameters, and completes the operation of outputting the satellite radio frequency signal after adding channel characteristics to the target anchor station and outputting the anchor station radio frequency signal after adding channel characteristics to the target satellite. The main design includes:

[0090] Receive the BeiDou global system satellite-to-ground anchor link channel operation-related scenario configuration parameters and operation control parameters 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] Multi-channel down-conversion of Ka-band satellite-ground anchored RF signals to L-band RF frequencies;

[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-ground anchored multi-channel parallel channel characteristics;

[0097] Multi-channel L-band satellite-to-ground anchored 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. During the period when multiple satellites pass over the target telemetry and remote control station in the scenario setting, it completes the dynamic channel simulation of the multi-channel telemetry and remote control signal space environment propagation, 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 direction 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 signal after adding channel characteristics to the target satellite and the satellite radio frequency signal after adding channel characteristics to the target telemetry and remote control station. The main design includes:

[0100] Receive the channel scenario configuration and operation control subsystem sent by the BeiDou global system telemetry and telecontrol link channel operation-related scenario configuration parameters and operation control parameters;

[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 respectively, 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 aforementioned BeiDou global system full-link spatial environment channel simulation method, detailed parameter information for the simulation objects is first set through the channel scenario configuration and operation control subsystem, allowing users to precisely configure the objects involved in the simulation and their parameter information. This ensures high consistency between the simulated environment and the real environment. The full-link simulation from satellite to user terminal encompasses all aspects of the signal transmission, transmission, reflection, and reception, covering the full frequency range of the BeiDou system. The core of this step is to generate scenario standard information in a unified spatiotemporal coordinate system that can simulate channel conditions under diverse geographical, climatic, and electromagnetic environments. This comprehensive scenario coverage ensures that the test environment accurately reflects the BeiDou system's performance in diverse regions and conditions around the world, providing an accurate reference framework for subsequent simulations. The full-link spatial environment channel simulation subsystem then performs full-link simulation based on this scenario standard information and a preset channel link establishment model, taking into account the relative motion between the simulation objects. This not only includes static scenario simulation but also enables real-time reflection and adjustment of the simulation environment to simulate the dynamic and changing real-world environment of satellites and users. This process not only includes direct channel simulation from satellite to ground users, but also encompasses complex channel environments such as those between satellites and ground reflections, thereby obtaining channel characteristic simulation parameters for each link. These parameters can comprehensively reflect the channel's performance under different conditions, providing 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 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 of the simulation process, ensuring that the test environment can adapt to the complex requirements of the Beidou system's equivalent dynamic operation. This has created a test environment that can comprehensively and accurately reflect the operating status of the Beidou system under various conditions. This not only significantly improves the coverage and accuracy of simulation tests, but also greatly enhances the adaptability and practicality of the test environment.

[0109] In one embodiment, the channel link establishment relationships include: an uplink injection channel link establishment relationship, an intersatellite link channel link establishment relationship, a downlink navigation channel link establishment relationship, a satellite-to-ground anchor channel link establishment relationship, and a telemetry and remote control channel link establishment relationship. A channel link establishment subsystem is constructed based on the channel link establishment relationships. The channel link establishment 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. Simulation objects include: Beidou satellites, ground receiving stations, injection stations, anchor stations, telemetry and remote control stations, and navigation user equipment. 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.

[0110] It is worth noting 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 radio frequency signal. The channel characteristics simulate the main influences of the spatial one-way propagation environment such as the troposphere and rain attenuation.

[0111] The inter-satellite link channel simulation subsystem supports the simulation of the inter-satellite link channel establishment model. Networked satellites establish communication links with each other through a time-division system to transfer parameters and perform inter-satellite ranging. The inter-satellite link polling is carried out through Ka-band wireless radio frequency signals. 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 establishment model. The satellite broadcasts the ephemeris, telegrams, 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 spatial and topographic one-way propagation environments.

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

[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 in a two-way uplink and downlink manner between the satellite and the ground through S-band wireless radio frequency signals. 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, a simulation of the BeiDou global system is performed based on channel scenario configuration. Dynamic parameters for the wireless signal transmission and reception channels between satellites, ground receiving stations, injection stations, and navigation user devices operating equivalently to those participating in the BeiDou global system are calculated and generated. These dynamic parameters are used as information data to drive the simulated links of each channel and input into the full-link space environment channel simulation subsystem to obtain operational control parameters for the signal transmission and reception links. These operational control parameters include signal type, signal frequency, quantity, link establishment status, time delay, frequency offset, power attenuation, and phase change.

[0116] In one embodiment, a common spatiotemporal coordinate system is established based on the scenario-standard operation control information, and parameter information of the simulation objects is associated within the spatiotemporal coordinate system to obtain a standard configuration for the operation scenario. Each link in the spatial environment channel is uniformly driven based on the channel model corresponding to the scenario-standard operation control information, thereby obtaining a set of link channel characteristic parameters.

[0117] In one embodiment, an L-band multi-channel uplink injection RF signal is received in an uplink injection link channel simulation subsystem according to the channel characteristic simulation parameters and the uplink injection channel link establishment relationship, and 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, based on channel characteristic simulation parameters and the intersatellite link channel establishment relationship, the intersatellite link channel simulation subsystem performs multi-channel down-conversion of Ka-band intersatellite link radio frequency signals to L-band radio frequency frequencies, and receives multi-channel L-band intersatellite link radio frequency signals. Based on the L-band intersatellite link radio frequency signals, multi-satellite-to-multi-satellite signal time-sharing polling communication switching and digital signal distribution are performed, and multi-channel parallel channel communication of the intersatellite link is simulated to recover and transmit the multi-channel L-band intersatellite link radio frequency signals. Simultaneously, the L-band multi-channel signals are up-converted to Ka-band intersatellite link radio frequency signals, completing the communication simulation of the link corresponding to the intersatellite link channel establishment relationship of the simulation object.

[0119] In one embodiment, 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 the channel characteristic simulation parameters and the 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, based on channel characteristic simulation parameters and the satellite-to-ground anchor channel link establishment relationship, a satellite-to-ground anchor link channel simulation subsystem performs multi-channel down-conversion of Ka-band satellite-to-ground anchor radio frequency signals to L-band radio frequency frequencies, and receives multi-channel L-band satellite-to-ground anchor radio frequency signals. Based on the L-band satellite-to-ground anchor radio frequency signals, multi-satellite-to-multi-station signal time-sharing polling communication switching and digital signal distribution are performed, and satellite-to-ground anchor multi-channel parallel channel communication is simulated to recover and transmit multi-channel L-band satellite-to-ground anchor radio frequency signals. Simultaneously, the L-band multi-channel signals are up-converted to Ka-band satellite-to-ground anchor radio frequency signals, completing the communication simulation of the link corresponding to the satellite-to-ground anchor channel link establishment relationship of the simulation object.

[0121] In one embodiment, 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. 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, and telemetry and remote control multi-channel parallel channel communication is simulated to restore and transmit the S-band telemetry and remote control multi-channel radio frequency signal, thereby completing 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 BeiDou global system operation scenario configuration, 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 participating in the equivalent dynamic operation within the BeiDou system within the same space-time coordinate system, and ensure their mutual connection 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 settings of various model parameters or properties, and load the initial operation.

[0128] S2. Unified full-link space environment channel simulation: Based on the initial scenario configuration and 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 equivalent dynamic operation within the Beidou system are simulated to obtain the channel characteristic change parameters of each link and ensure the tight coupling of the space environment between each link.

[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 characteristic 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 time and frequency to drive operation in an orderly manner. According to the unified scheduling of system operation control, perform clock difference simulation, frequency adjustment, frequency allocation, time synchronization and other operations required for system operation to ensure the precise synchronization of driving the operation of various subsystems;

[0136] S31 clock difference simulation;

[0137] S32 frequency adjustment;

[0138] S33 frequency allocation;

[0139] S34 time synchronization.

[0140] S4. Based on the uplink injection channel link establishment relationship and channel characteristic simulation parameters, complete the real-time switching of the wired RF signal unidirectional cross-pointing link between multiple uplink injection stations and multiple overhead satellites, and the dynamic real-time simulation of multiple unidirectional L-band uplink injection space environment channels from multiple stations to multiple satellites;

[0141] S41 adjusts the injection station's satellite pointing direction switching based on the uplink injection channel link establishment relationship parameters, and completes channel switching of the sampled uplink injection signal in the digital domain to ensure that its output is correctly mapped to the satellite receiving channel it is pointing 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 based on 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 maintains for a relatively long time, so there is no need for frequent switching.

[0144] S5. Based on the inter-satellite link channel 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 inter-satellite links between multiple satellites;

[0145] S51 adjusts the direction switching between satellites based on 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 is pointing to;

[0146] S52 dynamically adjusts the corresponding signal delay, amplitude, phase, and frequency shift characteristics based on the inter-satellite 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 based on the real-time changes in 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. Based on 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 from multiple overhead 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 from multiple satellites to multiple stations;

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

[0150] S62 dynamically adjusts the corresponding signal delay, amplitude, phase, and frequency shift characteristics based on 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 for the next time slot based on the real-time changes in the link establishment parameters and adjusts the satellite's signal pointing direction to the ground receiving station. This relationship changes slowly and lasts relatively long, so frequent switching is unnecessary.

[0152] S7. Based on the satellite-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-ground anchor space environment channels from multiple satellites to multiple stations;

[0153] S71 adjusts the bidirectional pointing switching between the anchor and the satellite based on the satellite-to-ground anchor channel link establishment relationship parameters, performs 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.

[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 two-way 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. Based on the telemetry and remote control channel link establishment relationship and channel characteristic simulation parameters, complete the real-time switching of the wired RF signal bidirectional cross-pointing link between multiple telemetry and remote control stations and multiple overhead satellites, and the dynamic real-time simulation of multiple bidirectional S-band telemetry and remote control space environment channels from multiple stations to multiple satellites;

[0157] S81 adjusts the pointing switching between the telemetry and remote control station and the satellite based on 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 is pointing to;

[0158] S82 dynamically adjusts the corresponding signal delay, amplitude, phase, and frequency shift characteristics according to the telemetry and remote control channel characteristic simulation parameters 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 two-way signal direction between the telemetry and remote control station and the satellite. The changing relationship switches slowly and maintains 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. In addition, 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 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.

[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 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, 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 simulation object in the link corresponding to the channel link relationship in the channel simulation subsystem according to the channel characteristic simulation parameters and the channel link relationship.

[0165] The unified time-frequency driving subsystem 508 is used to synchronize the operation frequency information and time-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 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, memory, network interface, display screen and input system connected via a system bus. 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 computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, a method for simulating the 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 covering the display screen, or a button, trackball or touchpad provided on the computer device housing, or an external keyboard, touchpad or mouse.

[0168] Those skilled in the art will understand that Figure 5-6 The structure shown in the figure is merely a block diagram of a portion 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 shown in the figure, or combine certain components, or have a different component arrangement.

[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 scenario standard operation control information is set in the channel scenario configuration and operation control subsystem according to the operation control parameters and the parameter information of the simulation objects participating in the link information transmission and reception.

[0171] 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, 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 in the link 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 operation frequency information and time-frequency signals of the channel scenario configuration and operation control subsystem, the full-link space environment channel simulation subsystem and 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. 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 scenario standard operation control information is set in the channel scenario configuration and operation control subsystem according to the operation control parameters and the parameter information of the simulation objects participating in the link information transmission and reception.

[0176] 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, 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 in the link 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 operation frequency information and time-frequency signals of the channel scenario configuration and operation control subsystem, the full-link space environment channel simulation subsystem and 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 will appreciate that all or part of the processes in the above-described embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the above-described embodiments. 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. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct RAM bus dynamic RAM (DRDRAM), and RAMbus dynamic RAM (RDRAM).

[0180] The technical features of the above embodiments can 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-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended 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 scenario standard operation control information in the channel scenario 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 driving each link in the spatial 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, obtaining a set of link channel characteristic parameters, and performing channel link simulation in the full-link spatial environment channel simulation subsystem according to the set of link channel characteristic parameters; 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; The channel link establishment relationship includes: an uplink injection channel link establishment relationship, an inter-satellite link channel link establishment relationship, a downlink navigation channel link establishment relationship, a satellite-to-ground anchor channel link establishment relationship, and a telemetry and remote control channel link establishment relationship; Constructing a channel link establishment subsystem according to the channel link establishment relationship; the channel link establishment 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 satellites, ground receiving stations, injection stations, anchor 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, 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.

2. The method according to claim 1, characterized in that Obtain the operational control parameters of the signal transceiver link, including: Perform simulation 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. The dynamic parameters are input into the full-link space environment channel simulation subsystem as information data driving the simulation links of each channel to obtain the operation control parameters of the signal transmission and reception links; The operation control parameters include: signal type, signal frequency, quantity number, link establishment status, time delay, frequency offset, power attenuation and phase change.

3. The method according to claim 2, characterized in that Uniformly driving 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 performing channel link simulation in the full-link space environment channel simulation subsystem according to the link channel characteristic parameter set, including: Setting a same spatiotemporal coordinate system according to the scenario standard operation control information, associating the parameter information of the simulation object in the spatiotemporal coordinate system, and obtaining a standard configuration of the operation scenario; Each link in the spatial environment channel is uniformly driven according to the channel model corresponding to the operation scenario standard configuration and the scenario standard operation control information to obtain a link channel characteristic parameter set.

4. The method according to claim 3, 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 parameters 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, as well as simulated uplink injection multi-channel parallel channel communication 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.

5. The method according to claim 3, 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 parameters and the channel link establishment relationship, including: down-converting the Ka-band intersatellite link radio frequency signal to an L-band radio frequency frequency in the intersatellite link channel simulation subsystem according to the channel characteristic simulation parameters and the intersatellite link channel 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 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, completing the communication simulation of the link corresponding to the link establishment relationship of the intersatellite link channel of the simulation object.

6. The method according to claim 3, 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 parameters 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.

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 parameters and the channel link establishment relationship, including: According to the channel characteristic simulation parameters and the satellite-to-ground anchor channel link establishment relationship, the satellite-to-ground anchor link channel simulation subsystem performs multi-channel down-conversion of the Ka-band satellite-to-ground anchor radio frequency signal to the L-band radio frequency frequency, and receives the multi-channel L-band satellite-to-ground anchor radio frequency signal; 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, as well as simulated satellite-to-ground anchor multi-channel parallel channel communication, to restore and transmit multi-channel L-band satellite-to-ground anchor radio frequency signals, and at the same time up-convert the L-band multi-channel to the Ka-band satellite-to-ground anchor radio frequency signal, completing the communication simulation of the link corresponding to the link establishment relationship of the simulation object in the satellite-to-ground anchor channel.

8. 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 parameters 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.

9. A BeiDou global system full-link space environment channel simulation system, characterized in that: For implementing the method according to any one of claims 1 to 8, the system comprises: 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; a full-link space environment channel simulation subsystem, configured 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, 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; A channel simulation subsystem is configured to complete, in the channel simulation subsystem, a communication simulation of the link corresponding to the channel link establishment relationship of the simulation object 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 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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