Decentralized Limited-Feedback Multiuser MIMO for Temporally Correlated Channels

<table>Overview of the feedback error compensation through angle forwarding. The transmit weight update is done on both transmit and receive side according to (<a href="https://static.hindawi.com/articles/jece/volume-2010/915653/figures/#EEq5">5</a>), where the rotors <svg height="12.1875" id="M128" style="vertical-align:-1.20384pt" version="1.1" viewbox="0 0 7.9375 12.1875" width="7.9375" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,12.1875)">
<g transform="translate(72,-62.25)">
<text transform="matrix(1,0,0,-1,-71.95,63.5)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝐉</tspan>
</text>
</g>
</g>
</svg> are built from the angles <svg height="13.55" id="M129" style="vertical-align:-2.29482pt" version="1.1" viewbox="0 0 34.575001 13.55" width="34.575001" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,13.55)">
<g transform="translate(72,-61.16)">
<text transform="matrix(1,0,0,-1,-71.95,63.5)">
<tspan style="font-size: 12.50px; " x="0" y="0">(</tspan>
<tspan style="font-size: 12.50px; " x="4.1634989" y="0">𝛼</tspan>
<tspan style="font-size: 12.50px; " x="11.202688" y="0">,</tspan>
<tspan style="font-size: 12.50px; " x="16.416439" y="0">𝛽</tspan>
<tspan style="font-size: 12.50px; " x="23.393112" y="0">)</tspan>
</text>
</g>
</g>
</svg>, which are contained in the feedback message <svg height="10.9125" id="M130" style="vertical-align:-0.17555pt" version="1.1" viewbox="0 0 8.8125 10.9125" width="8.8125" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,10.9125)">
<g transform="translate(72,-63.27)">
<text transform="matrix(1,0,0,-1,-71.95,63.5)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝐛</tspan>
</text>
</g>
</g>
</svg>. The coordinate plane indices <svg height="13.55" id="M131" style="vertical-align:-2.29482pt" version="1.1" viewbox="0 0 32.012501 13.55" width="32.012501" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,13.55)">
<g transform="translate(72,-61.16)">
<text transform="matrix(1,0,0,-1,-71.95,63.5)">
<tspan style="font-size: 12.50px; " x="0" y="0">(</tspan>
<tspan style="font-size: 12.50px; " x="4.1634989" y="0">1</tspan>
<tspan style="font-size: 12.50px; " x="10.414999" y="0">,</tspan>
<tspan style="font-size: 12.50px; " x="15.616247" y="0">𝑞</tspan>
<tspan style="font-size: 12.50px; " x="21.342621" y="0">)</tspan>
</text>
</g>
</g>
</svg> of the rotors are not shown.</table>

Journal of Electrical and Computer Engineering

fig1

Figure 1

Figure 1: Decentralized Limited-Feedback Multiuser MIMO for Temporally Correlated Channels 