A Novel Low Density Parity Check Coded Differential Amplitude and Pulse Position Modulation Free-Space Optical System for Turbulent Channel

作者：Liang, Yin; Zhang, Hua; Chen, Limin^*; Liu, Xiaoping; Lin, Xuehong

来源：China Communications, 2017, 14(3): 198-206.

DOI：10.1109/CC.2017.7897335

• DAPPM
• LDPC
• partly equidifferent mapping
• FSO
• turbulent

Based on the proposed partly equidifferent mapping and its specific Differential Amplitude and Pulse Position Modulation (DAPPM) demodulation, a modified FSO scheme for turbulent channel is designed and analyzed. The novel Low Density Parity Check (LDPC) coded 4x4 and 4x8 DAPPM Free-Space Optical communication (FSO) system is constructed. The Monte Carlo simulation results show approximately 2dB transmit power reduction against classical LD-PC-DAPPM at the identical Bit-Error-Rate in strong turbulent channel. The proposed partly equidifferent mapping is compatible with other modulations, so it enables widespread adoption in other coded FSO systems.

• 出版日期2017-3
• 单位北京邮电大学; 南昌大学