Securing Communication via Transmission of Artificial Noise by Both Sides: Bipolar-Beamforming Optimization

<table class="table-group" width="800px"><tr class="fig-image" id="a"><td><img alt="686403.fig.001a" src="https://static.hindawi.com/articles/mpe/volume-2013/686403/figures/686403.fig.001a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b>AN sent by Alice</td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="686403.fig.001b" src="https://static.hindawi.com/articles/mpe/volume-2013/686403/figures/686403.fig.001b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b>AN sent by Bob</td></tr></table></td></tr><tr class="fig-image" id="c"><td><img alt="686403.fig.001c" src="https://static.hindawi.com/articles/mpe/volume-2013/686403/figures/686403.fig.001c.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(c) </b>AN sent by both sides</td></tr></table></td></tr></table>

<table>Illustration to compare 3 different kinds of AN models.</table>

Mathematical Problems in Engineering

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Figure 1

Figure 1: Securing Communication via Transmission of Artificial Noise by Both Sides: Bipolar-Beamforming Optimization 