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Implementation of Very High Speed LDPC Decoder

This paper presents high-throughput decoder architecture for generic quasi-cyclic lowdensity parity-check (QC-LDPC) codes. Various optimizations are employed to increase the clock speed. A row permutation scheme is proposed to significantly simplify the implementation of the shuffle network in LDPC decoder. An approximate layered decoding approach is explored to reduce the critical path of the layered LDPC decoder.