پديدآورندگان :
Dabiri Mohammad Taghi fm_dabiri@sbu.ac.ir Department of Electrical Engineering, Shahid Beheshti University G. C., Tehran, Iran , Saber Mohammad Javad m_saber@sbu.ac.ir Department of Electrical Engineering, Shahid Beheshti University G. C., Tehran, Iran , Sadough Seyed Mohammad Sajad s_sadoughg@sbu.ac.ir Department of Electrical Engineering, Shahid Beheshti University G. C., Tehran, Iran
چكيده فارسي :
Free space optical link provides a number of advantages in terms of high data rate, resistance to jamming and license free data transmission. Atmospheric turbulence is a great challenge in clear sky when an optical wave is propagated through the atmosphere. Since turbulence-induced fading changes slowly, adaptive techniques can be used to mitigate the problem of fading. Compared to classical adaptive modulation schemes, here, we introduce an adaptive modulation technique by using digital pulse interval modulation (DPIM) to obtain the maximum throughput under average power constraint. We present numerical results in terms of throughput and outage probability for nominal values of FSO system. Our results indicate that adaptive DPIM outperforms previous adaptive modulation schemes based on pulse position modulation (PPM).
