RF Measurement Instrument Leveling Using OFDM Resource Information
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Solution Overview
Problem
Current auto leveling methods for radio frequency measurements, particularly on OFDM signals, are slow and yield suboptimal measurement results due to limitations in determining quality measures like error vector magnitude (EVM).
Innovation Solution
A measurement instrument and method that adapt settings based on resource information of the radio frequency signal, including resource allocation, power boost, and relevance to EVM calculation, to optimize signal-to-noise ratio and minimize clipping, using electronic components like RF amplifiers and attenuators, and automatic leveling without user intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If automatic leveling is performed using quality measures like error vector magnitude (EVM), then measurement quality can be maintained, but the measurement process becomes comparatively slow
Solution Approach 1:
The patent changes the parameter used for automatic leveling from quality-based measures (EVM) to resource-based measures (resource unit allocation, power boost indicators). This parameter transformation enables faster leveling decisions while maintaining measurement quality, as resource information provides direct guidance on optimal settings without requiring iterative quality assessment.
Solution Approach 2:
The patent introduces resource information as an intermediary between the radio frequency signal and the leveling control. By obtaining resource information about the signal (resource unit allocation, power boost status), the system can directly determine optimal leveling settings without needing to wait for quality measure calculations, thus speeding up the process while maintaining precision.
2Measurement precision
If resource information is obtained and used for adapting settings, then measurement quality improves, but device complexity increases
Solution Approach 1:
The patent makes the measurement instrument universally applicable to different OFDM signal configurations by using resource information as a universal control mechanism. The same resource-based approach works across various signal scenarios (different resource unit allocations, power boost configurations), providing consistent measurement quality without requiring scenario-specific complex processing for each case.
Solution Approach 2:
The system uses resource information that is already inherent in the OFDM signal structure to automatically adapt settings. The resource information about allocation and power boost is extracted from the signal itself, allowing the system to self-optimize without external intervention or complex external processing, thus reducing overall system complexity while maintaining high measurement quality.
Data Source
AI summary
A measurement instrument for measuring a radio frequency signal is described. The measurement instrument includes a radio frequency input for receiving the radio frequency signal and at least one electronic component for processing the radio frequency signal. The at least one electronic component is configured to process the radio frequency signal based on a setting. The measurement instrument includes at least one interface that is configured to obtain resource information of at least one resource unit of the radio frequency signal received. The measurement instrument includes at least one circuit that is configured to adapt a setting of the at least one electronic component for level setting of the measurement instrument based on the resource information obtained.