Multilevel Error Correction Coding with XOR-Based Soft Decision Load Reduction
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Solution Overview
Problem
The existing error correction coding device faces increased operation complexity and processing load as the number of middle bits and multilevel modulation symbols grows, making it inefficient for large-scale data transmission.
Innovation Solution
The proposed error correction coding device employs processing circuitry to perform exclusive OR operations on information bit strings, generate soft and hard decision error correction redundancy bits, and use reflection binary gray coding to create pulse amplitude modulation symbols, thereby reducing the operation amount of soft decision error correction coding processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If soft decision error correction coding is performed on all multilevel modulation symbols, then error correction capability is improved, but operation amount increases significantly
Solution Approach 1:
The patent segments the multilevel modulation symbols into two groups: first multilevel modulation symbols (with fewer bits) and second multilevel modulation symbols (with more bits). Soft decision error correction coding is applied selectively only to the first group, while the second group uses hard decision error correction coding. This segmentation reduces the overall operation amount while maintaining error correction capability for the more critical first group.
Solution Approach 2:
The patent applies different error correction coding methods to different parts of the data stream based on their specific requirements. The first multilevel modulation symbols (which have fewer bits and potentially higher error sensitivity) receive soft decision error correction coding for enhanced protection, while the second multilevel modulation symbols use hard decision error correction coding to reduce processing complexity. This local differentiation optimizes the balance between reliability and operation amount.
2Quantity of substance
If the number of middle bits and multilevel modulation symbols increases, then data transmission capacity is improved, but processing load increases
Solution Approach 1:
The patent divides the multilevel modulation symbols into first and second groups based on their bit characteristics. By segmenting the processing target, the system can handle larger overall data volumes while applying computationally intensive soft decision coding only to the first group with fewer symbols, thereby controlling processing load even as total transmission capacity increases.
Solution Approach 2:
The patent changes the parameter of error correction coding method based on the characteristics of different multilevel modulation symbol groups. For the first group with fewer bits, soft decision coding is used to maximize error correction performance. For the second group with more bits, hard decision coding is applied to reduce processing load. This parameter adaptation allows the system to maintain acceptable processing loads while supporting increased data transmission capacity.
Data Source
AI summary
An error correction coding device is configured to include an exclusive OR operating unit to acquire a plurality of information bit strings that are labels of respective multilevel modulation symbols from a frame in which a plurality of information bit strings that are labels of the plurality of multilevel modulation symbols are arranged, and operate an exclusive OR of a plurality of information bits that are labels of the respective multilevel modulation symbols, and a soft decision error correction coding unit to generate soft decision error correction redundancy bits by performing soft decision error correction coding on a plurality of operation results of the exclusive OR by the exclusive OR operating unit.