MIMO Wireless Channel Simulation Device for Multi-Path Testing
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Solution Overview
Problem
Current wireless communication R&D faces challenges in simulating complex wireless channels, particularly due to the difficulty in replicating multiple paths in a laboratory environment, leading to increased testing costs and cycles, and inefficient use of hardware resources in single-channel simulation methods.
Innovation Solution
A wireless channel monitoring and simulation device with multi-input multi-output (MIMO) capabilities, incorporating a wireless channel monitor, model database, wireless channel simulator, N-channel oscilloscope, and master computer software, which allows for the simulation of multiple channel environments and flexible signal processing, utilizing FPGA boards to simulate various fading effects and noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If single channel simulation is adopted, then hardware resources are simplified, but multiple paths of multiple channels cannot be simulated at the same time
Solution Approach 1:
The device segments the simulation system into multiple independent channel simulation modules, where each module can process one channel path. This allows multiple channels to be simulated simultaneously by activating multiple segments, while each segment maintains relatively simple hardware structure.
Solution Approach 2:
The device employs universal hardware resources that can be dynamically allocated to different channel paths. The same hardware units (such as signal processing components) can serve multiple channels through time-division or space-division multiplexing, enabling multi-channel simulation without proportionally increasing hardware complexity.
2Measurement precision
If corresponding hardware units of multiple paths are required to process signals separately, then signal processing accuracy is improved, but hardware resources are wasted and equipment stability deteriorates
Solution Approach 1:
The device merges multiple path processing functions into shared hardware units. Instead of dedicating separate hardware for each path, the same hardware resources are combined and time-shared across multiple paths, reducing overall hardware quantity while maintaining processing accuracy through proper resource allocation and timing control.
Solution Approach 2:
The device implements dynamic resource allocation where hardware units can be dynamically assigned to different paths based on current simulation requirements. This dynamic switching capability allows the system to maintain high processing accuracy when needed while optimizing hardware utilization, preventing both waste and over-complexity.
3Measurement precision
If wireless communication equipment is tested in actual environment, then channel characteristics are accurately reflected, but testing cost increases and R&D cycle extends
Solution Approach 1:
The device creates a virtual copy of the actual wireless channel environment through mathematical modeling and signal processing. Instead of physically transporting equipment to real-world test sites, the system synthesizes channel characteristics (fading, noise, interference) in a controlled laboratory setting, achieving accurate channel simulation without the time loss and cost of field testing.
Solution Approach 2:
The device introduces a channel simulation system as an intermediary between the wireless equipment under test and the test environment. This intermediary generates synthetic channel conditions that mimic real-world scenarios, allowing accurate channel characteristic evaluation to be performed in the lab rather than requiring actual deployment in complex real environments.
Data Source
AI summary
A wireless channel monitoring and simulation device with multi-input multi-output (MIMO) is provided, which includes: a wireless channel monitor, configured to collect characteristic parameters of wireless channels in typical environments, and establish models based on the characteristic parameters; a model database, configured to store the characteristic parameter models and parameterize; an original signal, configured to input N different original signals; a wireless channel simulator, configured to simulate a typical channel environment according to the model database configuration, so that the original signal is the same as that in a real typical channel environment, and adopts a N-path output; an N-channel oscilloscope, configured to observe specific waveforms of N-path simulated signals; and a master computer software, configured to process, analyze, and store N-path output signals. The disclosure has many input and output channels, many simulation channel paths, many observable signal changes, flexible design, and fast signal processing speed.