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A class of combinatorial structures, called absorbing sets, strongly influences the performance of low-density parity-check (LDPC) decoders at low error rates. Past experiments have shown that a class of (8,8) absorbing sets determines the error floor performance of the (2048,1723) Reed-Solomon based LDPC code (RS-LDPC). A postprocessing approach is formulated to exploit the structure of the absorbing...
A. class of combinatorial structures, called absorbing sets, strongly influences the performance of low-density parity- check (LDPC) decoders. In particular, the quantization scheme strongly affects which absorbing sets dominate in the error-floor region. Absorbing sets may be characterized as weak or strong. They are a characteristic of the parity check matrix of a code. Conventional quantization...
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