**5.3 Influence of the position of EYDWA amplifier**

The performance analysis of the system amplified under clear, medium and heavy rain conditions are shown in "**Table 2**", and Max Q factor has been analyzed **Figures 12** and **13**. It can be seen that under optimized conditions of data rate, the increase in the attenuation (respective intensity of rain) causes the decrease in the maximum transmission distance (FSO range) with acceptable quality factor Q values around of 6.

We note that EYDWA as post-amplifier can be carried the link range up to 26 km at and 8 km at BER 10<sup>9</sup> under clear and heavy rain, respectively. However EYDWA preamplifier limits this distance of FSO range to 16 Km and 4.5 km at BER 10<sup>9</sup> under clear and heavy rain conditions, respectively.
