Table 2.

Parameters of mmW and FSO beams for LD and HD configurations.

mmW					FSO
	${\mathit{N}}_{\mathit{a}}$	${\mathit{N}}_{\mathit{r}}$	$\Delta {\mathit{\alpha }}_{-\mathbf{3}\mathbf{dB}}$	$\Delta {\mathit{\beta }}_{-\mathbf{3}\mathbf{dB}}$	$\mathbf{2}{\mathit{\theta }}_{{\mathbf{B}}_{\mathbf{x}}^{\mathbf{p}}}$	$\mathbf{2}{\mathit{\theta }}_{{\mathbf{B}}_{\mathbf{z}}^{\mathbf{p}}}$
LD	32	8	∼$34.5\mathrm{deg}$	∼$12.5\mathrm{deg}$	$1\mathrm{deg}$	$1\mathrm{deg}$
HD	180	90	∼$9\mathrm{deg}$	∼$1.12\mathrm{deg}$	$0.1\mathrm{deg}$	$0.1\mathrm{deg}$