Howtosignalprocessing
- What are regular LDPC codes?
- What are the advantages of LDPC coding compared with Turbo coding?
- Are LDPC codes block codes?
- What is LDPC encoding and decoding?
What are regular LDPC codes?
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. wcn = wrm = number of ones in H.
What are the advantages of LDPC coding compared with Turbo coding?
LDPC codes have several advantages against their biggest rival Turbo codes and these advantages can be summarized as follows: demonstrating better block error performance, error floors in much lower Bit Error Rate (BER) values, the ability to obtain good error performance without the need for interleavers and an ...
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.
What is LDPC encoding and decoding?
LDPC coding method includes the Algorithm of LU decomposable encoding and the algorithm of partitioned iterated encoding. the algorithm of message passing, the algorithm of minimum-sum decoding and the algorithm of bit-flipping decoding are the common decoding algorithms of the LDPC codes.
