Iterative Signal Processing for Mitigation of Analog-to-Digital Converter Clipping Distortion in Multiband OFDMA Receivers

<table>Performance comparison between Receivers A and B with channel estimation for User 1 as a function of average received <svg height="10.725" id="M321" style="vertical-align:-0.1254pt" version="1.1" viewbox="0 0 35.150002 10.725" width="35.150002" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,10.725)">
<g transform="translate(72,-63.42)">
<text transform="matrix(1,0,0,-1,-71.95,63.6)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝑆</tspan>
<tspan style="font-size: 12.50px; " x="8.1269503" y="0">𝑁</tspan>
<tspan style="font-size: 12.50px; " x="18.767002" y="0">𝑅</tspan>
</text>
</g>
</g>
</svg> when 5 compensation iterations is performed and the clipping levels for <svg height="10.325" id="M322" style="vertical-align:-0.0pt" version="1.1" viewbox="0 0 9.0375004 10.325" width="9.0375004" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,10.325)">
<g transform="translate(72,-63.74)">
<text transform="matrix(1,0,0,-1,-71.95,63.79)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝐼</tspan>
</text>
</g>
</g>
</svg> and <svg height="12.925" id="M323" style="vertical-align:-1.90608pt" version="1.1" viewbox="0 0 12.325 12.925" width="12.325" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,12.925)">
<g transform="translate(72,-61.66)">
<text transform="matrix(1,0,0,-1,-71.95,63.61)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝑄</tspan>
</text>
</g>
</g>
</svg> branches are <svg height="14.725" id="M324" style="vertical-align:-3.13504pt" version="1.1" viewbox="0 0 40.875 14.725" width="40.875" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,14.725)">
<g transform="translate(72,-60.22)">
<text transform="matrix(1,0,0,-1,-71.95,63.4)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝛾</tspan>
</text>
<text transform="matrix(1,0,0,-1,-66.6,60.27)">
<tspan style="font-size: 8.75px; " x="0" y="0">𝐼</tspan>
</text>
<text transform="matrix(1,0,0,-1,-57.64,63.4)">
<tspan style="font-size: 12.50px; " x="0" y="0">=</tspan>
<tspan style="font-size: 12.50px; " x="12.027886" y="0">6</tspan>
</text>
</g>
</g>
</svg> dB and <svg height="16.262501" id="M325" style="vertical-align:-4.46928pt" version="1.1" viewbox="0 0 43.1875 16.262501" width="43.1875" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,16.2625)">
<g transform="translate(72,-58.99)">
<text transform="matrix(1,0,0,-1,-71.95,63.5)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝛾</tspan>
</text>
<text transform="matrix(1,0,0,-1,-66.6,60.37)">
<tspan style="font-size: 8.75px; " x="0" y="0">𝑄</tspan>
</text>
<text transform="matrix(1,0,0,-1,-55.79,63.5)">
<tspan style="font-size: 12.50px; " x="0" y="0">=</tspan>
<tspan style="font-size: 12.50px; " x="12.027886" y="0">3</tspan>
</text>
</g>
</g>
</svg> dB.</table>

Journal of Electrical and Computer Engineering

fig13

Figure 13

Figure 13: Iterative Signal Processing for Mitigation of Analog-to-Digital Converter Clipping Distortion in Multiband OFDMA Receivers 