Performance Comparison of Doppler Scale Estimation Methods for Underwater Acoustic OFDM

<table class="table-group" width="800px"><tr class="fig-image" id="a"><td><img alt="703243.fig.0011a" src="https://static.hindawi.com/articles/jece/volume-2012/703243/figures/703243.fig.0011a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b>Adding noise with power <svg height="15.575" id="M101" style="vertical-align:-0.17555pt" version="1.1" viewbox="0 0 15.3875 15.575" width="15.3875" xmlns="http://www.w3.org/2000/svg">
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<tspan style="font-size: 12.50px; " x="-0.16253901" y="0">𝜎</tspan>
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<tspan style="font-size: 8.75px; " x="0" y="0">2</tspan>
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</svg></td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="703243.fig.0011b" src="https://static.hindawi.com/articles/jece/volume-2012/703243/figures/703243.fig.0011b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b>Added noise with power 2<svg height="15.575" id="M102" style="vertical-align:-0.17555pt" version="1.1" viewbox="0 0 15.3875 15.575" width="15.3875" xmlns="http://www.w3.org/2000/svg">
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<tspan style="font-size: 12.50px; " x="0" y="0"></tspan>
<tspan style="font-size: 12.50px; " x="-0.16253901" y="0">𝜎</tspan>
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<tspan style="font-size: 8.75px; " x="0" y="0">2</tspan>
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<table>MACE10: BLER Performance using different Doppler estimation methods by adding artificial noise to the received signal,  <svg height="15.575" id="M100" style="vertical-align:-0.17555pt" version="1.1" viewbox="0 0 15.3875 15.575" width="15.3875" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,15.575)">
<g transform="translate(72,-59.54)">
<text transform="matrix(1,0,0,-1,-71.78,59.73)">
<tspan style="font-size: 12.50px; " x="0" y="0"></tspan>
<tspan style="font-size: 12.50px; " x="-0.16253901" y="0">𝜎</tspan>
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<tspan style="font-size: 8.75px; " x="0" y="0">2</tspan>
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</svg>  denoting the estimated ambient noise power.</table>

Journal of Electrical and Computer Engineering

fig11

Figure 11

Figure 11: Performance Comparison of Doppler Scale Estimation Methods for Underwater Acoustic OFDM 