## 5 FSO Networks with Relay Assist
### Unmanned Aerial Vehicle
\begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Ref.**} & \multicolumn{2}{c}{**FSO Link**} & \multicolumn{2}{c}{**RF Link**} & \multirow{2}{*}{**Max Data**} & \multirow{2}{*}{**Fading Distribution**} & \multicolumn{2}{c}{**FSO**} & \multicolumn{2}{c}{**RF**} & \multirow{2}{*}{**Rejay Type**} & \multicolumn{2}{c}{**Simulation**} & \multirow{2}{*}{**DC Bias**} \\  & \multicolumn{2}{c}{**Distance**} & \multicolumn{2}{c}{**Distance**} & & & **Wavelength** & & **(nm)** & **(GHz)** & & **Software** \\ \hline
[106] & 8 & Na & 750 Mbps & GG & 785 & Na & Na & Monte-Carlo & \\ \hline
[108] & 1 & 1 & NDA & GG & NDA & NDA & DF & NDA & \\ \hline
[110] & 0.5 & NDA & 5 Byte/s/Hz & GG/Rayleigh & NDA & NDA & DF & Matlab & \\ \hline
[111] & NDA & NDA & 7.23 Byte/s/Hz & GG/Rayleigh & 1550 & NDA & DF & NDA & ✓ \\ \hline
[112] & 0.2 & 0.2 & 16 bit/s/Hz & GG/Rayleigh & 1550 & 150 & NDA & NDA & \\ \hline
[113] & 25 & 25 & NDA & GG/Rician & NDA & NDA & NDA & Monte-Carlo & \\ \hline
[114] & 1 & NDA & 12 bit/s/Hz & M/Rayleigh & 785 & NDA & AF & Monte-Carlo & \\ \hline
[115] & NDA & NDA & 13 bit/s/Hz & GG/Rayleigh & NDA & NDA & AF & NDA & \\ \hline
[133,134] & NDA & NDA & NDA & GG/Rayleigh & NDA & NDA & DF & Matlab & \\ \hline
[136] & NDA & 20 & 70 bit/s/Hz & GG/Nakagami-m & 1550 & 1.9 & AF & Matlab & \\ \hline
[137] & 3 & 3 & 1.8 bit/s/Hz & GG/Nakagami-m & 1550 & 60 & DF & Monte-Carlo & \\ \hline
[138] & NDA & NDA & NDA & GG/Nakagami-m & 1550 & 60 & DF & Monte-Carlo & ✓ \\ \hline
[140] & NDA & NDA & 1.8 bit/s/Hz & GG/Nakagami-m & NDA & NDA & AF & Monte-Carlo & \\ \hline
[142] & NDA & NDA & NDA & GG/Nakagami-m & NDA & NDA & NDA & Monte-Carlo & \\ \hline
[144] & 1 & 1 & NDA & GG/Rayleigh & 1550 & NDA & AF & Monte-Carlo & ✓ \\ \hline
[146] & NDA & NDA & NDA & GG/Rayleigh & NDA & NDA & NDA & Monte-Carlo & ✓ \\ \hline
[147] & 1 & 1 & IGbps & GG/Rician & 1550 & 3.5 & DF & NDA & \\ \hline
[149] & NDA & NDA & NDA & GG/Nakagami-m & NDA & NDA & AF & Monte-Carlo & ✓ \\ \hline
[150] & NDA & NDA & 9.2 bit/s/Hz & GG/Nakagami-m & NDA & NDA & AF & NDA & \\ \hline
[151] & NDA & NDA & NDA & CG/K & NDA & NDA & AF & Monte-Carlo & \\ \hline
[152] & NDA & NDA & 0.5 bit/s/Hz & Malaga/AKM & NDA & NDA & DF & Monte-Carlo & \\ \hline
[153] & 3.8 & 3.8 & 4.5 bit/s/Hz & GG/Nakagami-m & 1550 & 60 & DF & Monte-Carlo & \\ \hline
[154] & NDA & NDA & 4 bit/s/Hz & GG/Rayleigh & NDA & NDA & AF & Monte-Carlo & \\ \hline
[155] & NDA & NDA & NDA & GG/Rayleigh & NDA & NDA & AF & Matlab & ✓ \\ \hline
[156] & NDA & NDA & NDA & \(\alpha\)-u/Rayleigh & NDA & NDA & DF & NDA & \\ \hline
[157] & 1 & 1 & NDA & Log-normal/Rayleigh & NDA & NDA & DF & NDA & \\ \hline
[158] & NDA & NDA & NDA & Malaga/Weibull & NDA & NDA & DF & NDA & \\ \hline
[159] & NDA & NDA & 1.5 Gbps & GG/Rayleigh & NDA & NDA & AF & NDA & \\ \hline
[160] & O.5 & 0.001 & 40 Gbps & NDA & 1580 & 100 & NA & NDA & \\ \hline
[161] & NDA & NDA & 55 Gbps & Log-normal/Rician & 1550 & 10 & DF & NDA & \\ \hline
[162] & NDA & NDA & 20 bit/s/Hz & Malaga/Rician & NDA & 28 & AF & Monte-Carlo & ✓ \\ \hline
[163] & NDA & NDA & 1 bit/s/Hz & Malaga/Nakagami-m & NDA & NDA & DF & Monte-Carlo & \\ \hline
[171] & NDA & NDA & NDA & GG/Rician & NDA & NDA & DF & Matlab & \\ \hline
[165] & NDA & NDA & 9 bit/s/Hz & GG/Rayleigh & NDA & NDA & AF & Monte-Carlo & \\ \hline
[166] & NDA & NDA & NDA & GG/Rayleigh & NDA & NDA & QER & NDA & \\ \hline
[167] & 0.5 & NDA & 6 bit/s/Hz & GG/Rayleigh & NDA & NDA & NDA & Monte-Carlo & \\ \hline
[168] & NDA & NDA & NDA & NDA & 670 & 2.4 & Switch & Matlab & \\ \hline
[169] & NDA & 0.005 & NDA & GG/Nakagami-m & NDA & 28 and 38 & AF & Monte-Carlo & \\ \hline
[170] & 600 & 600 & 900 Mb/s & GG/Nakagami-m & 1550 & 2.4 & NDA & Monte-Carlo & \\ \hline
[36] & NDA & NDA & NDA & GG/Negative & NDA & NDA & AF & Matlab & \\ \hline \hline \end{tabular}
\end{table} 
Table 5: Comparison of the relay-assisted models. FSO link. The authors propose a BF technique that boosts the minimum average signal-to-interference-plus-noise ratio (SINR) of the users.