Figure 4

Rate cumulative distribution function for FUE 1 (blue) and FUE 2 (red) when 2-bit mode 1 is applied with different beamforming methods and various background noise regimes. (a) (FAP 1 ego/FAP 2 alt). (b) (FAP 1 ego/FAP 2 ego). Interference scenario: ${\stackrel{¯}{\gamma }}_{1\to 1}=(15-\Delta )$ dB, ${\stackrel{¯}{\gamma }}_{1\to 2}=(0-\Delta )$ dB, ${\stackrel{¯}{\gamma }}_{2\to 1}=(15-\Delta )$ dB, and ${\stackrel{¯}{\gamma }}_{2\to 2}=(20-\Delta )$ dB. All cases: P _N used as reference power. Solid: Δ=10 dB (strong background noise regime). Dashed: Δ=0 dB (reference background noise regime). Dotted: Δ=−10 dB (weak background noise regime). Scheduling criterion: ${\widehat{\gamma }}_{\text{th}}^{\left(c\right)}$ (all cases). Threshold selection: FUE 2 is 30% of time silent.