Parallel LDPC Encoding for Multi-Rate Optical Error Correction
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Solution Overview
Problem
Current error correction systems in optical transmission fail to efficiently handle various transmission rates and distances while maintaining a manageable circuit scale, as they are not designed to accommodate flexible signal processing for multiple client rates and require increased circuit complexity for burst error tolerance.
Innovation Solution
The implementation of a configuration with multiple encoding or decoding circuits operating in parallel, utilizing rate conversion memories, merging circuits, and bit replacement circuits to execute encoding and decoding processes across different transmission rates, allowing for flexible handling of LDPC convolutional code sequences without increasing circuit scale.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple encoding/decoding circuits are arranged in parallel to handle various transmission rates, then adaptability to different transmission rates is improved, but device complexity increases
Solution Approach 1:
A single encoding circuit and decoding circuit are designed to handle multiple transmission rates (e.g., 1/4, 1/3, 2/3, 3/4 rates) through configurable parameters. The circuits use the same hardware structure with adjustable code length L and number of parallel processing units N, allowing one circuit to perform functions that would traditionally require multiple dedicated circuits for different rates.
2Reliability
If multiple encoding/decoding circuits are arranged in parallel to handle burst errors through interleaving, then error correction capability is improved, but device complexity increases
Solution Approach 1:
The patent combines burst error correction functionality with the rate adaptation capability in a single integrated circuit design. The interleaving for burst error correction is implemented within the same configurable framework that handles different transmission rates, merging what would traditionally be separate functions into one unified circuit that achieves both goals without requiring additional parallel circuits.
3Reliability
If code length L and number of parallel circuits N are increased to improve error correction performance, then reliability is improved, but device complexity and processing delay increase
Solution Approach 1:
The patent introduces dynamic configurability where the code length L and number of parallel processing units N can be adjusted based on the desired transmission rate and error correction requirements. This allows the system to optimize the balance between error correction performance and circuit complexity dynamically, rather than being fixed at maximum values that would always maximize complexity.
Data Source
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AI summary
Provided is an error correction device including an encoding circuit configured to encode a plurality of error correction code sequences, in which the encoding circuit includes a plurality of encoding circuits connected in parallel, and is configured to execute encoding processing for the plurality of error correction code sequences through use of all the plurality of encoding circuits by adjusting an output bus width and a frequency of an operation clock with respect to a difference in transmission rate for any payloads input in one or more systems.