Howtosignalprocessing
What is regular LDPC code?
Definition: A regular LDPC code is one for which the m×n parity check matrix of interest has wc one's in every column and wr ones in every row. • Each code bit is involved with wc parity constraints and each parity constraint involves wr bits. • “Low density” means wc ≪ m and wr ≪ n.
Are LDPC codes block codes?
LDPC codes are linear block codes, based on low-density parity check matrices H, i.e the number of non-zero elements in the matrix is much less than the number of zeros. The code rate R of an LDPC code is given by:(1) R = N - M N where N and M are respectively the number of columns and rows of H.
