Figure 9

${\mathit{N}}_{\mathit{t}}^{\mathbf{\left(}\mathit{u}\mathbf{\right)}}\mathbf{=}\mathbf{4}\mathbf{,}{\mathit{N}}_{\mathit{r}}\mathbf{=}\mathbf{1}$ and a spectral efficiency of 4 bits/s/Hz. ABER for node 1 with${\alpha }_{\left(1\right)}^2=1$, node 2 with${\alpha }_{\left(2\right)}^2=0.1$and node 3 with${\alpha }_{\left(3\right)}^2=0.01$.Ana(N_(u)) denotes the analytical upper bound for node u. Since the analytical bound is asymptotically tight, at low ABER the dashed and solid lines overlap.