Multiplexing Converter Impairment Evaluation Using Equivalent Noise
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Solution Overview
Problem
Existing methods struggle to accurately evaluate transmission impairments of high-speed multiplexing digital-to-analog and analog-to-digital converters in optical fiber communication systems, as they are complex and influenced by input signal amplitude, modulation format, and transmission rate.
Innovation Solution
A method and apparatus for evaluating multiplexing converters by measuring equivalent multiplicative and additive noise, allowing for performance estimation independent of input signal characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional evaluation methods are used for multiplexing converters, then the evaluation process becomes complex due to distortion mechanisms, but the accuracy of impairment assessment deteriorates
Solution Approach 1:
The patent transforms the complex distortion mechanism analysis into a simplified noise parameter measurement approach. By measuring equivalent noise power and converting it to impairment metrics through established formulas, the method changes the evaluation parameters from complex distortion characteristics to simple noise power measurements, achieving both accuracy and simplicity
Solution Approach 2:
The patent replaces the traditional mechanical/physical distortion analysis approach with an electrical noise measurement approach. Instead of analyzing complex distortion mechanisms directly, the method uses noise power measurements and mathematical conversions to evaluate impairments, substituting a simpler measurement system for a complex analysis system
2Adaptability or versatility
If existing evaluation methods are used, then the assessment may be simplified, but the results are affected by input signal amplitude, modulation format, and transmission rate
Solution Approach 1:
The patent introduces equivalent noise power as an intermediary parameter that decouples the evaluation from specific input signal characteristics. By measuring noise power and using it as an intermediate metric to calculate impairments, the method achieves universality across different signal types while maintaining accuracy through the established relationship between noise power and impairment metrics
Data Source
AI summary
A method and an apparatus for evaluating transmission impairments of a multiplexing converter. According to the method, impairments of a multiplexing converter are equivalent to the equivalent multiplicative noise and the equivalent additive noise, so as to allow evaluation of transmission impairments of the multiplexing converter, thereby to allow evaluation of the performance of a communication system. The multiplexing converter is a multiplexing analog-to-digital converter, or a multiplexing digital-to-analog converter. According to the present application, impairments of a multiplexing converter can be evaluated accurately, the performance evaluation of a communication system using the multiplexing converter is given, without being affected by an amplitude, a modulation format and a transmission rate of an input signal.