Outage-Constrained Beamforming for Two-Tier Massive MIMO Downlink with Pilot Reuse

<div>The rearranged <svg height="9.15657pt" id="M102" style="vertical-align:-0.0498209pt" version="1.1" viewbox="-0.0498162 -9.10675 10.7476 9.15657" width="10.7476pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.0135,0,0,-0.0135,0,0)"><path d="M746 650H445V615C520 608 528 602 528 517V370H255V517C255 602 263 608 335 615V650H35V615C112 608 121 602 121 517V133C121 48 112 42 39 35V0H337V35C263 42 255 48 255 133V319H528V133C528 48 520 42 441 35V0H746V35C670 42 662 48 662 132V517C662 602 668 608 746 615V650Z" id="g13-70"></path><glyph.data ascent="1024" descent="-360" horiz-adv-x="783" vert-adv-y="783"></glyph.data></g></svg> for the two-tier network.</div>

International Journal of Antennas and Propagation

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Figure 3

Figure 3: Outage-Constrained Beamforming for Two-Tier Massive MIMO Downlink with Pilot Reuse 