LDPC Bit Interleaver Permutation for 4096-Symbol Burst Errors

The patent segments the codeword into multiple bit groups (e.g., 180 bit groups of 360 bits each for a 64800-length codeword) and performs interleaving at the bit group level rather than individual bit level. This segmentation allows the system to maintain flexibility while effectively distributing burst errors across different bit groups, preventing concentrated error patterns that would degrade performance.

The patent employs parameter changes by defining specific interleaving patterns and permutation sequences tailored to particular modulation orders (e.g., 4096-QAM) and code rates (e.g., 3/15 for LDPC). The interleaver uses predetermined permutation orders and bit group configurations that are optimized for specific parameter combinations, achieving excellent performance while managing complexity through standardized parameter sets rather than fully adaptive designs.