Design of High-Rate LDGM codes
Puripong Suthisopapan, Mongkol Kupimai, Rangsan Tongta, Virasit Imtawil · 2009
Low density generator matrix to construct low-density parity check (LDPC) codes is designed in this paper. The proposed structure significantly reduces the encoding complexity of LDPC codes. Codes in this class can be easily constructed by concatenating the parity-check matrix of array low-density parity-check (ALDPC) codes with the identity matrix and also contains no short cycle of length four. The results shown in this paper indicate that these codes can perform very well at high code rate (R ¿ 0.85) under iterative decoding with no serial or parallel concatenation of two codes.