Self-adaptive topological structure based on wireless space channel simulator
By designing an adaptive topology based on a wireless space channel simulator and utilizing the flexible cascading of FPGA modules to achieve high-precision channel simulation, the system solves the problems of flexibility and multi-scenario adaptability of existing channel simulator systems, improves the efficiency and accuracy of R&D verification, and reduces testing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-25
- Publication Date
- 2026-03-24
AI Technical Summary
Existing wireless communication channel simulator systems are not accurate, have fixed functions, cannot be flexibly upgraded, cannot be integrated into communication prototype systems for full-link simulation, and are difficult to meet the testing needs of multiple scenarios, resulting in low R&D verification efficiency.
An adaptive topology based on a wireless space channel simulator is designed, employing composable FPGA modules, including RF signal preprocessing, multipath fading, multipath delay, and channel superposition simulation modules. The modules are flexibly cascaded and configured through host computer control to meet the needs of different application scenarios and stages.
It achieves high-precision and flexible channel simulation, supports multi-scenario coverage, improves the efficiency and accuracy of R&D verification, reduces testing costs and cycles, and serves as a bridge between the laboratory and real-world scenarios, supporting rapid iteration and customization requirements.
Smart Images
Figure CN224037371U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of channel simulator, concretely relates to a kind of self-adapting topological structure based on wireless space channel simulator. BACKGROUND
[0002] Due to the limitation of the design of wireless communication channel simulator, in the development and verification process, many problems are often faced, thereby hindering the development of wireless communication technology.
[0003] First, real wireless environment is complex and uncontrollable, and will be disturbed by many dynamic factors, for example: multipath effect, Doppler shift, atmospheric attenuation, etc., and cannot be directly reproduced in the laboratory, so a channel simulation system with good approximation effect is needed to accurately generate the characteristics of simulated channel through mathematical model and hardware equipment, to achieve high-precision flexible and controllable reproducible. The traditional channel simulator system, often has the problems of low overall system precision, high system integration and fixed function, commonly known as "black box";So it cannot be flexibly upgraded, and also cannot be integrated into the related communication prototype system to realize the system-level simulation of the whole link.
[0004] Secondly, as is known to all, in the process of communication system development and related verification, real-time poor verification test system, cannot solve the problems of high complexity and large amount of calculation (such as large-scale MIMO channel simulation), and with the development of technology, more and more emerging scenarios need to be added, which cannot meet the needs of multi-scene coverage. Therefore, real-time high-performance simulation equipment and full test scene coverage can make the development and verification work twice the result with half the effort, and is also a rigid requirement in the process of development and verification. At the same time, more importantly, simulating the actual satellite-ground wireless communication channel in the laboratory can greatly improve the efficiency and accuracy of development and test work without going to the real scene.
[0005] Without laboratory channel communication simulation environment, researchers cannot complete accurate verification work before on-site test with high cost and time-consuming, and cannot achieve "have a plan in mind";So it is also impossible to further achieve rapid testing, reduce testing cost and development cycle. But the existing channel simulator is difficult to meet the testing use under multi-scene conditions. UTILITY MODEL CONTENT
[0006] In order to solve the above problems, the application designs an adaptive topology based on a wireless space channel simulator, which can flexibly use different radio frequency modules without changing the host computer software, so as to meet the requirements of different application scenarios or the requirements of the same application scenario at different stages. Meanwhile, the channel simulation platform designed by the application adopts a combinable FPGA module, which can ensure the stable and reliable performance of the module and can be flexibly cascaded according to the bandwidth, the number of multipaths, the complexity of the channel model and the like.
[0007] An adaptive topology based on a wireless space channel simulator, comprising: a host computer unit, a channel simulation platform, a built-in satellite signal source and a radio frequency conversion unit.
[0008] The input end of the host computer unit is connected with the channel simulation platform.
[0009] The output end of the channel simulation platform is connected with the input end of the built-in satellite signal source.
[0010] The output end of the built-in satellite signal source is connected with the radio frequency conversion unit.
[0011] Preferably, the channel simulation platform comprises a radio frequency signal preprocessing module and a channel superposition simulation module.
[0012] The input end of the radio frequency signal preprocessing module is connected with the host computer unit.
[0013] The output end of the radio frequency signal preprocessing module is connected with the input end of the channel superposition simulation module.
[0014] The output end of the channel superposition simulation module is connected with the input end of the built-in satellite signal source.
[0015] Preferably, the channel simulation platform further comprises a multipath time delay simulation module, which is arranged between the radio frequency signal preprocessing module and the channel superposition simulation module.
[0016] The input end of the multipath time delay simulation module is connected with the output end of the radio frequency signal preprocessing module.
[0017] The output end of the multipath time delay simulation module is connected with the input end of the channel superposition simulation module.
[0018] Preferably, the channel simulation platform further comprises a multipath fading simulation module, which is arranged between the radio frequency signal preprocessing module and the multipath time delay simulation module.
[0019] The input end of the multipath fading simulation module is connected with the output end of the radio frequency signal preprocessing module.
[0020] The output end of the multipath fading simulation module is connected with the input end of the multipath time delay simulation module.
[0021] The advantages and effects of the present application are as follows:
[0022] The adaptive topology structure based on the wireless space channel simulator designed by the present application comprises a host computer unit, a channel simulation platform, a built-in satellite signal source and a radio frequency conversion unit; the input end of the host computer unit is connected with the channel simulation platform; the output end of the channel simulation platform is connected with the input end of the built-in satellite signal source; the output end of the built-in satellite signal source is connected with the radio frequency conversion unit; wherein the channel simulation platform is designed by combining a radio frequency signal preprocessing module, a multipath fading simulation module, a multipath time delay simulation module and a channel superposition simulation module and other FPGA modules, which can be used in combination according to actual needs. Through the above design, the present application firstly ensures the stable and reliable performance of the modules, and can flexibly cascade configure multiple FPGA modules according to the bandwidth, the number of multipaths, the complexity of the channel model and the like, and then flexibly use different radio frequency modules and FPGA modules without changing the host computer software, so as to meet the requirements of different application scenarios or the requirements of the same application scenario at different stages.
[0023] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, so as to be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following will be described in detail with the preferred embodiments of the present application and the accompanying drawings.
[0024] According to the detailed description of the specific embodiments of the present application in the following text combined with the drawings, those skilled in the art will more clearly understand the above and other purposes, advantages and characteristics of the present application. BRIEF DESCRIPTION OF DRAWINGS
[0025] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating creative labor. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual proportion.
[0026] Figure 1 The structural block diagram of the adaptive topology structure based on the wireless space channel simulator designed by the present application. DETAILED DESCRIPTION
[0027] To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. In the following description, specific details such as specific configurations and components are provided only to help a comprehensive understanding of the embodiments of the present application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, in order to be clear and concise, the description of known functions and structures is omitted in the embodiments.
[0028] It should be understood that the "one embodiment" or "the embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "one embodiment" or "the embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner.
[0029] In addition, reference numerals and / or letters can be repeated in different examples in the present application. Such repetition is for the purpose of simplification and clarity, and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.
[0030] The term "and / or" herein is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, B exists alone, and A and B exist together. The term "and" herein is a description of another association relationship of the associated objects, which means that there can be two relationships, for example, A and B can mean that A exists alone and A and B exist together. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after it.
[0031] The term "at least one" herein is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, at least one of A and B can mean that A exists alone, A and B exist together, and B exists alone.
[0032] It should also be noted that the relationship terms such as first and second in the present document are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion.
[0033] Embodiment 1
[0034] Please refer toFigure 1 The embodiment mainly introduces a self-adaptive topology based on a wireless space channel simulator, which comprises an upper computer unit, a channel simulation platform, a built-in satellite signal source and a radio frequency conversion unit. The input end of the upper computer unit is connected with the channel simulation platform. The output end of the channel simulation platform is connected with the input end of the built-in satellite signal source. The output end of the built-in satellite signal source is connected with the radio frequency conversion unit.
[0035] The upper computer unit is the core of control, which is mainly composed of a PC and a PXI controller based on mature mainstream. The main function is that the PC configures the running parameters of the whole system including environmental parameters (such as channel conditions, noise, etc.) and channel parameters (such as delay, Doppler effect, etc.) through control instructions, and monitors the system state and receives feedback data from other modules. The design of the upper computer unit is mature, and the present application does not make specific discussion.
[0036] After the signal is added with channel characteristics by the channel simulation platform, the built-in satellite signal source generates a standard radio frequency signal, simulates the signal transmitted by the satellite, and outputs to the frequency conversion unit.
[0037] The frequency conversion unit can up-convert or down-convert the frequency of the radio frequency signal as needed to adapt to the working frequency band of the subsequent related arbitrary measured device, and further transmit the converted signal to the subsequent related arbitrary measured device.
[0038] Further, the channel simulation platform comprises a radio frequency signal preprocessing module and a channel superposition simulation module.
[0039] The input end of the radio frequency signal preprocessing module is connected with the upper computer unit.
[0040] The output end of the radio frequency signal preprocessing module is connected with the input end of the channel superposition simulation module.
[0041] The output end of the channel superposition simulation module is connected with the input end of the built-in satellite signal source.
[0042] Further, the channel simulation platform further comprises a multipath time delay simulation module, which is arranged between the radio frequency signal preprocessing module and the channel superposition simulation module.
[0043] The input end of the multipath time delay simulation module is connected with the output end of the radio frequency signal preprocessing module.
[0044] The output end of the multipath time delay simulation module is connected with the input end of the channel superposition simulation module.
[0045] Further, the channel simulation platform further comprises a multipath fading simulation module; the multipath fading simulation module is arranged between the radio frequency signal preprocessing module and the multipath time delay simulation module.
[0046] The input end of the multipath fading simulation module is connected with the output end of the radio frequency signal preprocessing module.
[0047] The output end of the multipath fading simulation module is connected with the input end of the multipath time delay simulation module.
[0048] The channel simulation platform is a core part of the whole adaptive topology structure, which mainly comprises a radio frequency signal preprocessing module, a multipath fading simulation module, a multipath time delay simulation module and a channel superposition simulation module. The channel simulation platform is used for receiving control instructions and channel parameters of an upper computer, and is used for realizing functions such as channel real-time simulation and channel real-time superposition (such as multipath effect, attenuation, etc.). The multipath fading simulation module, the multipath time delay simulation module and the channel superposition simulation module realize the multipath propagation simulation and superposition of signals through embedded software programming based on FPGA language, and can flexibly adjust the system functions and support secondary function development of users through the modular design thought.
[0049] The principle of the application is that: first, the relevant scene is set through the upper computer unit, for example: including environmental parameter setting, such as channel condition, noise, etc., and channel parameter setting, such as delay, Doppler effect, etc.
[0050] Then, the channel simulation platform is configured with channel parameters. After the channel simulation platform receives the relevant scene setting and channel parameter setting instructions from the upper computer, the channel simulation platform realizes functions such as channel real-time simulation and channel real-time superposition (such as multipath effect, attenuation, etc.) through each FPGA functional module in the channel simulation platform. The multipath fading simulation module, the multipath time delay simulation module and the channel superposition simulation module realize the multipath propagation simulation and superposition of signals through embedded software programming based on FPGA language.
[0051] The signal with the channel characteristics added by the channel simulation platform generates a radio frequency signal through the built-in satellite signal source and outputs the radio frequency signal to the frequency conversion unit. After the signal enters the frequency conversion unit, the frequency of the radio frequency signal is up-converted or down-converted according to the test requirements, and then the signal can be input into the equipment to be tested. The equipment to be tested receives and tests the performance of the equipment to be tested under real channel conditions, such as signal demodulation, bit error rate, etc. After the test is completed, the test results are returned to the upper computer unit through the feedback path for subsequent analysis and other operations, so as to complete a complete closed-loop test process.
[0052] The adaptive topology structure based on the wireless space channel simulator designed by the application has an open, flexible, easy-to-expand architecture, and the system can be quickly iterated, thereby closely following channel standards and customized requirements, thereby ensuring the requirement of full-scene coverage. Through relevant research and development research verification work by using the application, test cost and risk can be greatly reduced, and the electromagnetic propagation environment in the real world can be simulated and reproduced, so that communication prototype verification systems can be repeatedly implemented before costly and time-consuming field tests, and the communication performance of communication equipment or systems can be quickly tested, thereby reducing test cost and development cycle.
[0053] Therefore, the wireless space channel simulator has become a "digital wind tunnel" for space-air-ground communication systems, which not only solves the problem of technical verification, but also is a bridge from the laboratory to the market. Without it, the reliability, standardization and innovation speed of modern communication systems cannot be guaranteed, especially for complex systems such as space-air-ground integrated networks, the simulator has become an indispensable infrastructure. Therefore, the value of the wireless space channel simulator not only lies in technical breakthroughs, but also reshapes the research and development paradigm of communication products, making "simulation first" a new industry standard.
[0054] Typical application scenario effect verification one: 5G NTN prototype verification platform
[0055] Based on the 3GPP 5G NR protocol, referring to the NTN protocol part, supporting the frequency bands and bandwidths specified in the protocol, flexible and configurable; mainly applicable to the current protocol evolution process, for protocol development and algorithm optimization.
[0056] Typical application scenario effect verification two: DVB-S2 communication link system
[0057] High-speed real-time signal processing (modulation and demodulation, coding and decoding, etc.) simulation of real satellite data transmission transmitters, ground receiving stations or wideband satellite communication systems including gateway stations and user terminals. Main application occasions: 1. High-speed data transmission (HDR) of remote sensing satellites; 2. Digital video broadcast (DVB); 3. Communication service load testing; 4. Low-orbit satellite broadband access prototype.
[0058] The above only describes preferred embodiments of the application, and does not limit the protection scope of the application. For those skilled in the art, the application can have various changes and variations. Any changes, modifications, replacements, integrations and parameter changes to these embodiments within the spirit and principles of the application, which can realize the same functions without departing from the principles and spirit of the application, fall within the protection scope of the application.
Claims
1. An adaptive topology based on a wireless spatial channel emulator, characterized by, The utility model relates to a channel simulation platform and a satellite signal source simulation system, and relates to the field of satellite signal source simulation. The utility model relates to a channel simulation platform and a satellite signal source simulation system, and relates to the field of satellite signal source simulation. The utility model relates to a channel simulation platform and a satellite signal source simulation system, and relates to the field of satellite signal source simulation. The utility model relates to a channel simulation platform and a satellite signal source simulation system, and relates to the field of satellite signal source simulation. The utility model relates to a channel simulation platform and a satellite signal source simulation system, and relates to the field of satellite signal source simulation.
2. The self-adapting topology based on wireless spatial channel simulator according to claim 1, characterized in that, The utility model relates to a channel simulation platform and a satellite signal source simulation system, and relates to the field of satellite signal source simulation. The utility model relates to a channel simulation platform and a satellite signal source simulation system, and relates to the field of satellite signal source simulation. The utility model relates to a channel simulation platform and a satellite signal source simulation system, and relates to the field of satellite signal source simulation. The utility model relates to a channel simulation platform and a satellite signal source simulation system, and relates to the field of satellite signal source simulation.
3. The self-adapting topology based on wireless spatial channel simulator according to claim 2, characterized in that, The utility model relates to a channel simulation platform and a satellite signal source simulation system, and relates to the field of satellite signal source simulation. The utility model relates to a channel simulation platform and a satellite signal source simulation system, and relates to the field of satellite signal source simulation. The utility model relates to a channel simulation platform and a satellite signal source simulation system, and relates to the field of satellite signal source simulation.
4. The self-adapting topology based on wireless spatial channel simulator according to claim 3, characterized in that, The utility model relates to a channel simulation platform and a satellite signal source simulation system, and relates to the field of satellite signal source simulation. The utility model relates to a channel simulation platform and a satellite signal source simulation system, and relates to the field of satellite signal source simulation. The utility model relates to a channel simulation platform and a satellite signal source simulation system, and relates to the field of satellite signal source simulation. The utility model relates to a channel simulation platform and a satellite signal source simulation system, and relates to the field of satellite signal source simulation.