A new construction method of LDPC codes for optical transmission systems
Jianguo Yuan, Yuexing Jia, Wenjuan Bi, Liang Xu · Frontiers of Optoelectronics · 2012
Based on the construction method of systematically constructed Gallager (SCG)(4, k ) code, a new improved construction method of low density parity check (LDPC) code is proposed. Compared with the construction method of SCG(4, k ) codes improved before, the proposed construction method has some advantages, such as saving storage space and reducing computation complexity in the hardware implementation. And then LDPC(5929, 5624) code with 5.42% redundancy is constructed by the proposed method. The simulation results and analysis show that the constructed LDPC(5929, 5624) code has better error-correction performance, lower redundancy and lower decoding complexity than those of a classic Reed-Solomon (RS)(255, 239) code. Therefore, LDPC(5929, 5624) code, constructed by the proposed construction method on LDPC codes, can better suitable for optical transmission systems.