MIMO Test Signal Generation Using Phase Shift Calibration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for generating MIMO test signals in wireless communication testing are inefficient due to the need for manual determination of calibration matrices and high-order matrix calculations, which are time-consuming and require human intervention, leading to low testing efficiency.
Innovation Solution
A method and device that perform phase shift transformations on calibration matrices to acquire space propagation matrices, determine a target matrix with optimal isolation degree based on maximum amplitude values, and generate a transmitting signal through pre-calculated throughput signals and target calibration matrices, automating the process and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual determination of calibration matrices and high-order matrix calculations are used, then testing accuracy can be maintained, but testing efficiency deteriorates due to time-consuming processes and human intervention
Solution Approach 1:
The system performs self-calibration by automatically determining calibration matrices through phase shift transformations and amplitude value comparisons without requiring human intervention. The device autonomously calculates space propagation matrices and selects optimal calibration matrices based on maximum amplitude criteria, enabling the testing system to service itself and eliminate manual operational bottlenecks.
Solution Approach 2:
The patent replaces manual mechanical operations with automated computational processes. Instead of human operators manually determining calibration matrices through iterative calculations and subjective judgments, the system uses automated phase shift transformations, inverse matrix calculations, and algorithmic selection based on amplitude values, substituting mechanical human intervention with electronic computation.
2Reliability
If multiple calibration matrices are tested to find optimal isolation degree, then system isolation performance is improved, but time consumption increases significantly
Solution Approach 1:
The system performs preliminary phase shift transformations on all candidate calibration matrices before final selection. By pre-calculating space propagation matrices and their amplitude values for multiple calibration matrices, the system prepares all necessary data in advance, enabling rapid comparison and selection of the optimal matrix without time-consuming iterative testing during actual operation.
Solution Approach 2:
The patent changes the evaluation parameter from subjective human judgment of isolation degree to an objective quantitative metric based on maximum amplitude values. By transforming calibration matrices through phase shifts and comparing amplitude parameters, the system objectively identifies optimal isolation performance through mathematical criteria rather than human assessment, significantly reducing time consumption.
3Adaptability or versatility
If high-order calibration matrices are used for complex MIMO systems, then system capability is enhanced, but computational complexity and processing time increase
Solution Approach 1:
The patent segments the complex calibration process into distinct modular steps: phase shift transformation, inverse matrix calculation, amplitude value extraction, and optimal matrix selection. By dividing the high-order matrix processing into sequential manageable operations, the system reduces computational complexity at each stage while maintaining the capability to handle complex MIMO systems with multiple antennas and calibration matrices.
Data Source
AI summary
Provided are a method and a device for generating a MIMO test signal which is configured to test a performance of MIMO wireless terminal. With the method, the plurality of space propagation matrixes of the MIMO testing system are acquired by performing the phase shift transformation on the plurality of calibration matrixes of the MIMO testing system, the target space propagation matrix having the isolation degree meeting the preset condition is determined according to the maximum amplitude value of elements in each inverse matrix of the plurality of space propagation matrixes, and the transmitting signal for test is generated by a calculation according to the throughput testing signal acquired by the pre-calculation and the target calibration matrix corresponding to the target space propagation matrix.