Title :
A Novel Low Complexity LDPC Encoder Based on Optimized RU Algorithm with Backtracking
Author :
Sun, XiangRan ; Zeng, Zhibin ; Yang, Zhanxin
Author_Institution :
Inf. Eng. Sch., Commun. Univ. of China, Beijing, China
Abstract :
We present a low-complexity high-efficiency LDPC encoder, based on classic method of Richardson and Urbanke with a novel backtracking algorithm, which we propose to substitute greedy algorithm for approximate triangulation with sparse matrix of LDPC codes. For the LDPC code in CMMB, for example, the complexity of encoding is reduced effectively, and an implementation of LDPC encoder for two different code rate (1/2 and 3/4) on Altera Stratix II EP1S180F102014 can achieve encoding rate 34 Mbps and 69 Mbps.
Keywords :
encoding; parity check codes; CMMB; backtracking algorithm; greedy algorithm; low complexity LDPC encoder; optimized Richardson-Urbanke algorithm; sparse matrix; Algorithm design and analysis; Complexity theory; Encoding; Greedy algorithms; Hardware; Parity check codes; Sparse matrices;
Conference_Titel :
Multimedia Technology (ICMT), 2010 International Conference on
Conference_Location :
Ningbo
Print_ISBN :
978-1-4244-7871-2
DOI :
10.1109/ICMULT.2010.5631468