Integrated Signal Analyzer for MIMO Channel Simulation
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Solution Overview
Problem
Current methods for testing multiple-input multiple-output (MIMO) and multi-user MIMO (MU-MIMO) wireless systems are hindered by the need for expensive and interacting channel simulators, leading to inefficiencies and limitations in simulating multiple RF channels, especially in cabled environments, which restricts the ability to perform controlled and repeatable tests.
Innovation Solution
A wireless signal analyzer with radio channel generation functions and sounding packet logic that simulates RF channels, allowing for the creation of statistical models and precoding matrices to test MIMO and MU-MIMO devices without external channel simulators, enabling flexible and cost-effective testing in a controlled environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If external channel simulators are used to simulate RF channels for MIMO testing, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the channel simulation function from external channel simulators and integrates it directly into the signal analyzer. This eliminates the need for separate external channel simulator devices, reducing system complexity while maintaining the ability to simulate RF channels for MIMO testing
Solution Approach 2:
The patent combines multiple functions (signal analysis, channel simulation, and RF channel modeling) into a single integrated signal analyzer system. This merging eliminates the need for multiple separate devices including external channel simulators, reducing both device complexity and cost while preserving measurement precision
2Adaptability or versatility
If multiple external channel simulators are used to simulate multiple RF channels, then adaptability is improved, but device complexity and cost increase
Solution Approach 1:
The patent implements a universal signal analyzer that can simulate multiple RF channels simultaneously through a single device. The system uses software-configurable channel models that can adapt to different MIMO scenarios (2x2, 4x4, MU-MIMO, etc.) without requiring additional hardware channel simulators, thus achieving multi-channel adaptability with reduced device complexity
Solution Approach 2:
The patent merges the functionality of multiple external channel simulators into a single integrated signal analyzer. The system can generate and manage multiple simulated RF channels through software configuration, eliminating the need for multiple separate channel simulator devices while maintaining full adaptability for testing various MIMO configurations
3Measurement precision
If external channel simulators are used for controlled RF channel testing, then measurement precision is improved, but cost increases
Solution Approach 1:
The patent uses software-based channel models that create virtual copies of RF channel characteristics without requiring physical external channel simulator hardware. The signal analyzer generates simulated channel responses through digital signal processing, providing controlled and repeatable testing conditions at lower cost by replacing expensive hardware with software implementations
Solution Approach 2:
The patent replaces expensive, complex external channel simulator hardware with more affordable software-based channel modeling capabilities integrated into the signal analyzer. This software-based approach provides the same controlled testing functionality at reduced cost, making precise MIMO channel testing more accessible
Data Source
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AI summary
Systems and methods are disclosed herein to provide communication test systems for the testing of multiple-input multiple-output (MIMO) radio frequency wireless data communication devices, systems and networks, including Multi-User MIMO (MU-MIMO) devices and systems. In accordance with one or more embodiments, a test system containing an integrated MIMO signal analyzer is disclosed that includes a protocol engine operative in conjunction with a waveform generator and waveform analyzer that analyzes the signal waveform of a device under test. Such a test system may offer improved capabilities such as a simpler and more flexible measurement of complex MIMO signal waveforms, more automated measurements of MIMO waveforms including beamforming functions, and more accurate measurement of the efficiency of MIMO related functions such as channel estimation, transmit precoding and beamforming.