Optical Signal Compensation Device Using Nonlinear Algorithm
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Solution Overview
Problem
Current optical communication systems face processing delays due to the need for table lookups during nonlinear compensation of optical signals, which affects the overall performance and efficiency of signal transmission.
Innovation Solution
The implementation of a new nonlinear compensation algorithm in the optical signal compensation device that eliminates the need for table lookups, allowing for faster processing and reducing overall delay by using a parallel structure with linear and nonlinear compensation modules connected in parallel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional nonlinear compensation methods using table lookups are employed, then compensation performance is maintained, but processing delay increases and processing speed decreases
Solution Approach 1:
The patent extracts and removes the table lookup operation from the nonlinear compensation process. By eliminating the need for pre-computed lookup tables, the system directly calculates nonlinear compensation values through mathematical operations on the received signal, thereby removing the time-consuming table access step while maintaining compensation accuracy
Solution Approach 2:
The patent performs preliminary dispersion compensation before nonlinear compensation. By first correcting linear dispersion effects, the signal is prepared in an optimal state for subsequent nonlinear compensation, allowing the use of simplified algorithms that do not require extensive lookup tables, thus reducing processing delay
2Device complexity
If traditional nonlinear compensation with table lookups is used, then compensation accuracy is maintained, but device complexity increases
Solution Approach 1:
The patent removes the complex table lookup mechanism and replaces it with direct mathematical calculations. This extraction of the lookup table dependency simplifies the device architecture while maintaining compensation accuracy through efficient real-time computation of nonlinear effects
Solution Approach 2:
The patent changes the computational parameters from discrete table lookups to continuous mathematical operations. By transforming the compensation approach from reading pre-stored values to calculating values based on signal parameters, the device complexity is reduced while preserving the ability to accurately compensate for nonlinear effects
3Reliability
If incident power is increased to improve signal-to-noise ratio, then receiving end signal quality improves, but nonlinear effects are amplified reducing system performance
Solution Approach 1:
The patent applies preliminary dispersion compensation to counteract linear effects before nonlinear compensation. This preliminary anti-action prepares the signal in a state where subsequent nonlinear compensation can more effectively counterbalance the harmful nonlinear effects generated by high power transmission, thereby maintaining signal quality without requiring excessive power increases
Data Source
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Figure 2-b~3-a
AI summary
Embodiments of the present invention disclose an optical signal compensation device, where, a nonlinear compensation module in the optical signal compensation device adopts a new nonlinear compensation algorithm to perform nonlinear compensation on an optical signal, and during the process of performing the nonlinear compensation, it is no longer required to look up a table. Technical solutions provided in the embodiments of the present invention can effectively increase the processing speed of the nonlinear compensation, thereby reducing the overall processing delay of an optical signal compensation system.