LDPC Group-Wise Interleaving for Error Floor Reduction
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Solution Overview
Problem
Current data transmission using LDPC codes faces challenges in securing excellent communication quality, particularly in maintaining error correction capabilities and avoiding error floor phenomena in decoding characteristics.
Innovation Solution
The implementation of a data processing device and method that performs LDPC encoding based on a specific parity check matrix with a code length of 16200 bits and encoding rates of 6/15, 8/15, and 10/15, along with group-wise interleaving and mapping to 64 signal points, to enhance communication quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LDPC encoding is performed with increased code length to approach Shannon limit, then error correction capability is improved, but system complexity and processing overhead increase
Solution Approach 1:
The LDPC code is segmented into multiple bit groups (e.g., 360 bits per group for 16200-bit code), allowing distributed processing during encoding and decoding operations. This segmentation reduces the computational burden on single processing units while maintaining the overall error correction capability of the full code length.
Solution Approach 2:
The patent employs different coding rates (e.g., 6/15, 8/15, 10/15) and code lengths (e.g., 16200 bits) as adjustable parameters to optimize the balance between error correction performance and system complexity. By selecting appropriate parameters based on channel conditions, the system achieves near-Shannon limit performance without unnecessarily increasing complexity.
2Reliability
If group-wise interleaving is applied to improve decoding performance and avoid error floor, then communication quality is enhanced, but processing time and computational load increase
Solution Approach 1:
Group-wise interleaving is applied during the encoding stage before transmission, organizing bits into groups and permuting them according to predetermined patterns. This preliminary arrangement prepares the data structure to resist burst errors and avoid error floor phenomena during decoding, reducing the computational burden and time required during the critical decoding phase.
Solution Approach 2:
The patent uses specific interleaving patterns and group sizes (e.g., 360-bit groups) as configurable parameters to optimize the trade-off between decoding performance and processing time. These parameters are selected based on channel characteristics to achieve excellent communication quality without excessive processing overhead.
Data Source
AI summary
The present technology relates to a data processing device and a data processing method, which are capable of securing excellent communication quality in data transmission using an LDPC code. In group-wise interleave, an LDPC code in which a code length N is 16200 bits and an encoding rate r is 6/15, 8/15, or 10/15 is interleaved in units of bit groups of 360 bits. In group-wise deinterleave, a sequence of the LDPC code that has undergone the group-wise interleave is restored to an original sequence. For example, the present technology can be applied to a technique of performing data transmission using an LDPC code.