Salah  Aldeen Adnan, Mazin  Ali A. Ali, Sarah  Ali. Al-Saeedi, 
    Characteristics of RF Signal in Free Space Optics (RoFSO) Considering Rain Effect,
    Journal of Engineering and Applied Sciences,
    Volume 13,Issue 7,
    2018,
    Pages 1644-1648,
    ISSN 1816-949x,
    jeasci.2018.1644.1648,
    (https://makhillpublications.co/view-article.php?doi=jeasci.2018.1644.1648)
    Abstract: Radio over Free Space Optics (Ro-FSO) is promising future communication techniques. In this
study, design Ro-FSO with mathematical analysis for transmission and simulation comparison of radio
frequency RF (20, 60) GHz for transporting 2.5 and 10 Gbps over acceptable maximum distance are possible of
FSO under clear air, light rain, moderate rain and heavy rain weather condition. To knowing the ability radio
frequencies for carrying difference values of information (data rate) over the same optical source 1550 nm.
    Keywords: Radio over Free Space Optics (Ro-FSO);Radio Frequency (RF);Signal to Nnoise Ratio (SNR);turbulence (C ) and Bit Rate Error (BER);source;difference