Measurement Instrument Averaging Error Vectors to Reduce Uncorrelated Noise
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Solution Overview
Problem
Existing measurement instruments struggle to generate high-quality constellation diagrams due to electronic noise and distortion introduced by hardware, leading to misclassification of signal symbols and deterioration of signal quality.
Innovation Solution
A measurement instrument with multiple input paths, a calculation device to calculate error vectors, and a display device to create a constellation diagram based on average error vectors, effectively reducing uncorrelated noise by averaging error vectors across multiple signal paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If cross correlation is used to reduce uncorrelated noise, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The measurement signal is divided into multiple independent input paths, each processing the signal separately. By segmenting the measurement into parallel paths, the system can average results across paths to reduce uncorrelated noise while keeping each individual path relatively simple.
Solution Approach 2:
Multiple input paths are combined through averaging of their respective error vectors. The calculation device merges the measurements from different paths by computing average error vectors, which reduces uncorrelated noise and improves measurement precision.
2Measurement precision
If multiple input paths are used to reduce noise, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The measurement system is segmented into multiple independent input paths that can be implemented in parallel. Each path processes signals independently, allowing noise reduction through averaging while maintaining modular simplicity in each individual path.
Solution Approach 2:
Multiple input paths are designed with universal functionality to process different measurement signals through the same methodology. This multi-functional approach allows the system to handle various signals while using identical processing logic, reducing overall system complexity.
3Manufacturing precision
If error vectors are averaged across multiple measurement signals, then constellation diagram quality is improved, but calculation complexity increases
Solution Approach 1:
Error vectors are calculated for each input path before the averaging operation. By performing the error vector calculation in advance for each path, the system simplifies the final averaging step and organizes the computation in a manageable sequence.
Solution Approach 2:
The error vector calculation is performed independently for each input path, creating copies of the calculation process. These copied calculations are then averaged to produce the final result, improving constellation diagram quality through systematic repetition and averaging.
Data Source
AI summary
The present invention relates to a measurement instrument comprising: at least a first and a second input paths, wherein each input path is configured to receive a corresponding measurement signal from a device under test, wherein each measurement signal comprises a number of states; a calculation device connected to the at least first and second input paths, configured to calculate an error vector corresponding to each state of each measurement signal, and to produce an average error vector for each state based on the error vectors of each measurement signal corresponding to the same state; and a display device, adapted to create a constellation diagram based on the produced average error vector for each state.