Title :
Design of high-rate LDGM codes
Author :
Suthisopapan, Puripong ; Kupimai, Mongkol ; Tongta, Rangsan ; Imtawil, Virasit
Author_Institution :
Electr. Eng. Dept., Khon Kaen Univ., Khon Kaen, Thailand
Abstract :
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.
Keywords :
matrix algebra; parity check codes; high-rate LDGM codes; identity matrix; iterative decoding; low density generator matrix; low density parity check codes; parity-check matrix; Block codes; Code standards; Concatenated codes; DSL; Encoding; Iterative decoding; Linear code; Magnetic memory; Matrices; Parity check codes; Low Density Generator Matrix (LDGM) codes; Low density parity check (LDPC) codes; high rate; irregular; low complexity encoding; systematic;
Conference_Titel :
Communications and Networking in China, 2009. ChinaCOM 2009. Fourth International Conference on
Conference_Location :
Xian
Print_ISBN :
978-1-4244-4337-6
Electronic_ISBN :
978-1-4244-4337-6
DOI :
10.1109/CHINACOM.2009.5339739
