MICROSTRUCTURE AND MECHANICAL PROPERTIES OF PB-4%SB ALLOY PROCESSED BY EQUAL CHANNEL ANGULAR PRESSING



A New Method for Building Low-Density-Parity-Check Codes

This paper proposes a new method for building low-density-parity-check codes, exempt of cycle of length 4, based on a circulant permutation matrix, which needs very little memory for storage it in the encoder and a dual diagonal structure is applied to guarantee that parity check bits can be recursively computed with linear calculation complexity.T

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