Table 1 Optimal cutoff SNR ${\mathit{\gamma }}_{\mathbf{0}}$ and ${\mathit{\gamma }}_{\mathit{c}}$ for i.i.d. Nakagami- m fading channels and different number of antennas.

${\mathit{n}}_{\mathbf{1}}\mathbf{=}{\mathit{n}}_{\mathbf{2}}\mathbf{=}\mathbf{1}$

${\mathit{n}}_{\mathbf{1}}\mathbf{=}{\mathit{n}}_{\mathbf{2}}\mathbf{=}\mathbf{2}$

${\mathit{n}}_{\mathbf{1}}\mathbf{=}{\mathit{n}}_{\mathbf{2}}\mathbf{=}\mathbf{3}$

${\mathit{\gamma }}_{\mathbf{0}}$

${\mathit{\gamma }}_{\mathit{c}}$

${\mathit{\gamma }}_{\mathbf{0}}$

${\mathit{\gamma }}_{\mathit{c}}$

${\mathit{\gamma }}_{\mathbf{0}}$

${\mathit{\gamma }}_{\mathit{c}}$