International Journal of Digital Multimedia Broadcasting / 2010 / Article / Fig 4

Research Article

Robust MMSE Transceiver Designs for Downlink MIMO Systems with Multicell Cooperation

Figure 4

Convergence of the DCOA: duality gap, four Lagrange multipliers, and four per-antenna transmission power, as functions of the number of iterations under the per-antenna power constraint with . (Legend: the 4 different colors in the two middle subplots and two lower subplots correspond to the 4 transmit antennas.)
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