International Journal of Digital Multimedia Broadcasting / 2010 / Article / Fig 1

Research Article

Near Optimum Power Control and Precoding under Fairness Constraints in Network MIMO Systems

Figure 1

Sum power minimization subject capacity (sum rate) and fairness constraint.
(a) The individual power levels and the sum power for the six cases we study. The sum power is significantly lower (21.6 dBm) without fairness than with fairness (  dBm). In fact, in a real system Cases would hardly be feasible for User-3 due to the typical power limitation of MS (  dBm)
(b) The individual rates in the six fairness cases that we study. The sum rate is kept constant (2 bps/Hz/cell), but this sum rate is “distributed” unequally (Case ) or nearly equally (Case ) in the different cases

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