LDPC Group-Wise Interleaving for Burst-Error-Resistant Transmission
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Solution Overview
Problem
Current data transmission using LDPC codes faces challenges in maintaining excellent communication quality due to errors and burst errors, particularly in AWGN channels and multi-path environments, which affect decoding performance and power consumption.
Innovation Solution
The implementation of a data processing device and method that includes LDPC encoding with a parity check matrix of specific code lengths and encoding rates, combined with group-wise interleaving and mapping to 256 signal points, to improve error resistance and decoding efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LDPC encoding with standard parity check matrix is used, then error correction capability is provided, but communication quality deteriorates under burst errors and AWGN channels
Solution Approach 1:
The patent divides the LDPC code into multiple bit groups (e.g., 360 bits per group) and applies group-wise interleaving to rearrange these groups according to a specific permutation pattern. This segmentation approach transforms the original sequence of bit groups into a reordered sequence that disperses burst errors across different code blocks, improving error correction performance under AWGN and multi-path fading channels.
Solution Approach 2:
The patent specifies precise parameters for the LDPC code including code length N=16200 bits, encoding rates r=10/15 or 12/15, and bit group size of 360 bits. The group-wise interleaving uses a defined permutation pattern that changes the original bit group sequence. These parameter optimizations are tailored for 256-QAM modulation to achieve near-Shannon-limit performance while maintaining robustness against burst errors and channel impairments.
2Reliability
If group-wise interleaving is applied to improve error resistance, then decoding performance improves, but system complexity increases
Solution Approach 1:
The patent implements group-wise interleaving by dividing the LDPC code into manageable bit groups of 360 bits each and applying a predefined permutation pattern to rearrange these groups. This segmented approach to interleaving simplifies the implementation complexity compared to bit-level interleaving, while still achieving significant improvements in decoding performance and error resistance.
3Reliability
If code length is increased to improve error correction capability, then performance near Shannon limit is achieved, but transmission time increases
Solution Approach 1:
The patent optimizes the LDPC code parameters with a code length of N=16200 bits and specific encoding rates (10/15 or 12/15) to achieve performance near the Shannon limit. The group-wise interleaving with 360-bit groups and specific permutation patterns further enhances error correction capability while maintaining efficient transmission timing for 256-QAM modulation, balancing reliability and transmission speed.
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 10/15 or 12/15 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.