Virtual Gain Correction for Optical Module Tuning
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Solution Overview
Problem
In distributed antenna systems, optical modules need to be tuned to have the same performance characteristics for efficient communication, but traditional methods are costly and time-consuming, and there are limitations in duplicating reference modules due to different filter curves and component tolerances, leading to variations in gain curves between production modules.
Innovation Solution
The method involves selecting a golden module pair with an optimal gain curve, creating a reference module with virtual gain correction, measuring and comparing gain curves, determining offset values, and using these offset values to tune production modules, allowing for efficient tuning without physical adjustments like resistance or inductance changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional physical adjustment methods are used to tune optical modules, then manufacturing precision can be improved, but production time and costs increase significantly
Solution Approach 1:
The patent creates a virtual copy of the reference module's gain curve characteristics through digital modeling and simulation. Instead of physically adjusting each production module to match the reference, the system generates a digital twin that replicates the reference module's performance characteristics, allowing for rapid virtual tuning and validation before physical deployment.
Solution Approach 2:
The patent replaces traditional mechanical/physical adjustment methods (such as adjusting resistors, capacitors, or inductors in the RF circuitry) with a virtual/digital approach. The tuning is performed through software-based gain curve matching and virtual prototyping, eliminating the need for iterative physical adjustments and manual measurements.
2Adaptability or versatility
If multiple reference modules are created for different frequency bands, then adaptability improves, but device complexity and costs increase
Solution Approach 1:
The patent develops a universal virtual reference model that can adapt to multiple frequency bands through software configuration rather than requiring separate physical reference modules for each band. The virtual reference system uses parametric models that can be adjusted to represent different frequency band characteristics, making a single versatile tool capable of handling diverse tuning requirements across multiple bands.
Solution Approach 2:
The patent utilizes parameter-based virtual modeling where the reference module characteristics are defined by adjustable parameters (such as gain values, frequency points, and performance specifications) rather than fixed physical components. By changing these parameters, the same virtual reference system can accurately represent different frequency bands and module configurations without requiring physical reconfiguration or multiple reference modules.
3Productivity
If virtual gain correction is implemented, then productivity increases, but measurement and validation complexity increases
Solution Approach 1:
The patent implements automated feedback mechanisms where the virtual reference model continuously compares predicted gain curves against actual measured data from production modules. This feedback loop automatically identifies deviations and guides the tuning process, reducing the need for manual validation while maintaining high measurement accuracy through systematic error detection and correction.
Data Source
AI summary
A method of tuning a production module using a reference module with virtual gain correction is provided. The method includes selecting a counterpart reference module created for a select application. The production module is commutatively coupled to the selected counterpart reference module to generate a production module pair. A production module gain curve for the production module pair is measured for each frequency band to be used by the production module. The production module is tuned based at least in part on offset gain values at select number of frequency observation points for each frequency band associated with the counterpart reference module and gain values at the select number of frequency observation points of the measured production module gain curve for each frequency band.