Pixel-Based I/Q Mask Testing for Continuous Signal Impairment Detection
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Solution Overview
Problem
Current methods require human inspection for determining errors in demodulated signal constellations, lacking continuous observation capabilities.
Innovation Solution
A device comprising a communication interface and digital processing logic that provides a graphical pixel-based mask for demodulated signals, allowing automated verification of compliance with an allowable spread based on impairment type and strength, using I/Q symbol constellations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If human inspection is used to determine errors in demodulated signal constellations, then measurement precision can be maintained, but productivity is reduced and continuous observation cannot take place
Solution Approach 1:
The system performs self-verification by automatically comparing received I/Q symbols against a pixel-based mask without requiring human inspection. The digital processing logic autonomously determines compliance or non-compliance, enabling continuous monitoring while maintaining reliable error detection through automated decision-making algorithms
Solution Approach 2:
The patent replaces the mechanical human inspection process with an automated digital processing system. The digital processing logic uses electronic comparison operations between symbol positions and mask definitions to detect errors, substituting human visual inspection with machine-based automated analysis that enables continuous operation
2Productivity
If automated verification is implemented, then productivity and continuous monitoring are enabled, but device complexity increases
Solution Approach 1:
The patent extracts the essential verification function into a separate pixel-based mask that defines allowable symbol spreads independently. This mask serves as a pre-configured reference that simplifies the digital processing logic, as the system only needs to compare symbol positions against the mask rather than implementing complex error detection algorithms from scratch
Solution Approach 2:
The system changes the verification approach from complex continuous analysis to discrete parameter comparison. By defining allowable spreads as specific pixel-based parameters in the mask, the system simplifies the digital processing to checking whether symbol positions fall within predefined parameter boundaries, reducing computational complexity
Data Source
AI summary
Disclosed are a device for graphical analysis of an impairment of a demodulated signal, and a corresponding process. The device comprises a communication interface and a digital processing logic. The communication interface is configured for receiving the demodulated signal including in-phase and quadrature, I/Q, symbols. The digital processing logic is configured for providing a graphical pixel-based mask defining an allowable spread of the received I/Q symbols in a graphical pixel-based I/Q symbol constellation of the demodulated signal. The allowable spread depends in direction on a type of the impairment and in magnitude on a strength of the impairment. The digital processing logic is further configured for verifying a compliance of the I/Q symbol constellation of the demodulated signal with the mask.