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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...
Performance of free-space optical (FSO) links employed quadrature phase shift keying (QPSK) modulation with phase compensation error over Gamma-Gamma turbulent channel is investigated in this paper. By considering the key factors of weather condition, additional noise and phase noise, the closed-form expressions of symbol error rate (SER) are derived by employing the hyper-geometric functions substitution...
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