Title :
Degree distribution mapping method of parity check matrix in LDPC based FSO communication through atmospheric turbulence channel
Author :
Fei Xiao ; Lijia Zhang ; Bo Liu ; Qi Zhang ; Yongjun Wang ; Jianglong Zheng ; Qinghua Tian ; Xiaoli Yin ; Xiangjun Xin
Author_Institution :
Sch. of Electron. Eng., Beijing Univ. of Posts & Telecommun. (BUPT), Beijing, China
Abstract :
A degree distribution mapping method of parity check matrix in irregular QC-LDPC based FSO communication is proposed. Before channel coding, use the mapping method to select the appropriate distribution of the parity check matrix corresponding to atmospheric channel estimation feedback. BER performance of the optimal distribution of the parity check matrix in different turbulence intensity has been made. Compared to old coding schemes without optimizing degree distribution, the new one have greatly improved the transmission performance.
Keywords :
atmospheric turbulence; channel coding; channel estimation; error statistics; matrix algebra; optical communication; parity check codes; wireless channels; BER performance; FSO communication; atmospheric channel estimation feedback; atmospheric turbulence channel; channel coding; degree distribution mapping method; free-space optical communication; irregular QC-LDPC; parity check matrix; transmission performance; turbulence intensity; Adaptive optics; Atmospheric modeling; Bit error rate; Channel estimation; Laser beams; Parity check codes; Signal to noise ratio; Atmospheric turbulence channel; Degree distribution mapping method; QC-LDPC;
Conference_Titel :
Optical Communications and Networks (ICOCN), 2014 13th International Conference on
Conference_Location :
Suzhou
DOI :
10.1109/ICOCN.2014.6987132
