LDPC Bit Group Interleaving for QPSK Burst Error Scattering

The patent segments the bit stream into blocks and applies interleaving at the block level rather than bit-by-bit. The LDPC codeword is divided into multiple blocks, and each block is interleaved independently using a block interleaver, which prevents burst errors from affecting the entire codeword and confines them to localized segments that can be more effectively corrected

The patent transitions from one-dimensional bit-by-bit interleaving to two-dimensional block-based interleaving. By organizing bits into blocks with specific dimensions and applying interleaving patterns across these blocks, the system adds a spatial dimension to error distribution, effectively scattering burst errors across multiple blocks rather than concentrating them

The patent divides the codeword into multiple blocks and applies systematic interleaving patterns within each block. This segmentation allows the use of relatively simple intra-block interleaving schemes while achieving effective burst error distribution across the entire codeword through the combination of block division and patterned interleaving

The patent applies interleaving only within each block rather than across the entire codeword in a complex manner. This partial action approach simplifies the interleaver design while still achieving effective error distribution, as the block-level interleaving is sufficient to scatter burst errors without requiring full-codeword complex interleaving