Movable Antenna MIMO Test System
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Solution Overview
Problem
Existing MIMO testing systems require multiple antennas, making the testing process inefficient and costly, as a single antenna is not sufficient for effectively simulating multiple input multiple output channels.
Innovation Solution
A test system and method utilizing a movable single antenna to simulate multiple input multiple output channels by sequentially transmitting or receiving signals, emulating a virtual antenna array, and allowing for investigation of beamforming behavior through movement around the device under test.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple antennas are used for MIMO testing, then testing accuracy and channel simulation capability are improved, but device complexity and testing costs increase
Solution Approach 1:
The patent employs a movable antenna that can dynamically change its position relative to the device under test. By moving the antenna to different locations and sequentially measuring signals, the system simulates multiple MIMO channels without requiring multiple simultaneous antennas. The antenna's positional dynamics enable virtual channel creation through spatial diversity.
Solution Approach 2:
The movable antenna creates virtual copies of multiple antenna channels by sequentially occupying different spatial positions. Each position represents a virtual antenna element, and the sequence of measurements from different positions reconstructs the MIMO channel characteristics without physically requiring multiple antennas at once.
2Adaptability or versatility
If multiple antennas are deployed for MIMO testing, then multiple channel simulation capability is improved, but testing efficiency and cost-effectiveness worsen
Solution Approach 1:
A single antenna is designed to perform multiple functions by sequentially serving as different virtual antenna elements in the MIMO system. The same physical antenna structure is reused across multiple positions and time slots, eliminating the need for multiple dedicated antennas and improving testing efficiency while maintaining multi-channel simulation capability.
Solution Approach 2:
The system uses periodic movement of the antenna through a predetermined sequence of positions. Each position in the sequence corresponds to a specific virtual channel, and the periodic repetition of this movement pattern enables continuous MIMO channel simulation with a single antenna, improving productivity through systematic reuse.
Data Source
AI summary
A test system is used for testing multiple input multiple output capabilities. The system comprises a device under test, a movable antenna and a signal simulation unit. Furthermore, the signal simulation unit simulates at least two multiple input multiple output channels in order to test the multiple input multiple output capabilities of the device under test.