Digital information Destination performance measures for a given coding Scheme. Some
examples are directed to improved decoding techniques for linear block codes, Such as low-
density parity-check (LDPC) codes. In one example, modifications to a conven tional belief-
propagation (BP) decoding algorithm for LDPC codes significantly improve the performance
of the decoding algorithm So as to more closely approximate that of the theoretically optimal
maximum-likelihood (ML) decoding Scheme. BP decoder performance generally is …