Low-density parity-check (LDPC) code, a very promising near-optimal error correction code (ECC), is being widely considered in next generation industry standards. In this paper, two simple iterative low complexity algorithms for decoding LDPC codes have been explained. These algorithms are implemented using real additions only and also not dependent on power spectral density. Comparison of these algorithms with standard BP algorithm are explained. How these algorithms are useful for standards DVB-S2, T2 and WiMAX are explained. In VLSI implementation these algorithms using shift-LDPC codes these algorithms reduces hardware complexity
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