Optical wireless communication based on the log-normal model under the turbulence channel was introduced. Combining the characteristics of atmospheric channel, we analyzed the error rate of atmospheric laser communication using several kinds of subcarrier modulation system is analyzed. Under different scintillation distribution, the error rate of wireless optical communication using subcarrier modulation on turbo code was analyzed, and the bit error rate (BER) performance between Turbo coded and uncoded systems was compared. The simulation results showed that the error performance of binary phase shift keying (BPSK) was better than others, and turbo coded is efficient to improve jamming-rejection capability of system with the low signal-noise ratio (SNR) and strong scintillation index.