Title :
Design and Code Optimization of Parallel Concatenated Gallager Codes
Author :
Wang, Fang ; Cheng, Shixin ; Xu, Wei ; Wang, Haifeng
Author_Institution :
Southeast Univ., Nanjing
Abstract :
Constructing PCGCs with unequal-code-rate irregular component LDPC codes is proposed in this paper. Parameters of component codes are optimized by differential evolution based on EXIT chart. In the optimization results, code rate of component code 1 is relatively higher and the other one is lower so that these two component codes play different roles in different decoding stages. Numerical simulation results show that the proposed PCGCs with optimized parameters outperform PCGCs constructed by equal-code-rate regular/likely regular component codes and optimized irregular LDPC code.
Keywords :
concatenated codes; parity check codes; code optimization; irregular component LDPC codes; parallel concatenated Gallager codes; unequal-code-rate; Concatenated codes; Design optimization; Encoding; Iterative decoding; Laboratories; Land mobile radio; Mobile communication; Numerical simulation; Optimization methods; Parity check codes;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2007. PIMRC 2007. IEEE 18th International Symposium on
Conference_Location :
Athens
Print_ISBN :
978-1-4244-1144-3
Electronic_ISBN :
978-1-4244-1144-3
DOI :
10.1109/PIMRC.2007.4394240
