Digital Signal Processing for Optical Nonlinear Effect Compensation
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Solution Overview
Problem
Optical fiber communication systems face challenges in accurately processing nonlinear effects in signal transmission due to inter-symbol interference and limited bandwidth, leading to reduced signal-to-noise ratios.
Innovation Solution
A signal processing method that converts optical analog signals to digital signals and performs nonlinear effect compensation, optionally followed by linear filtering, using a nonlinear activation function to enhance signal processing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If optical analog signals are transmitted through the optical fiber communication network, then the signal can carry information over long distances with large bandwidth, but the signal is damaged by various noises and nonlinear effects causing reduction of signal-to-noise ratio
Solution Approach 1:
The patent applies digital signal processing techniques to convert the harmful nonlinear effects and noises into compensatable distortions. By digitizing the optical signal and applying computational algorithms, the system transforms the previously irreparable analog signal degradation into a form that can be mathematically corrected, thereby converting the harm of nonlinear effects into a solvable problem.
Solution Approach 2:
The patent replaces traditional analog signal processing with digital signal processing. Instead of using analog components to handle nonlinear effects directly in the optical domain, the system converts optical signals to digital signals and applies computational methods, substituting mechanical/analog processing with digital/computational processing to achieve better noise resistance and nonlinear compensation.
2Measurement precision
If digital signal processing is applied to compensate nonlinear effects, then signal processing accuracy is improved, but the device complexity increases due to additional processing modules
Solution Approach 1:
The patent integrates multiple functions into a unified digital signal processing framework. The same digital processing system performs both analog-to-digital conversion and nonlinear effect compensation, eliminating the need for separate dedicated hardware for each function. This multi-functional approach reduces overall device complexity while maintaining high signal processing accuracy.
Solution Approach 2:
The patent changes the domain parameter from analog to digital, fundamentally altering how signals are processed. By representing continuous optical signals as discrete digital values, the system enables the application of sophisticated compensation algorithms that would be impossible in the analog domain, achieving high accuracy without proportionally increasing hardware complexity.
Data Source
AI summary
Provided are a signal processing method and apparatus, a storage medium, and an electronic apparatus. The method is applied to an optical communication receiving end, and comprises: after receiving an optical analog signal, converting the optical analog signal into a digital signal; and performing nonlinear effect compensation processing on the digital signal.