Sparse Signal Recovery via ECME Thresholding Pursuits

<table>Influence of thresholding parameter <svg height="13.425" id="M226" style="vertical-align:-2.29482pt" version="1.1" viewbox="0 0 8.8500004 13.425" width="8.8500004" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,13.425)">
<g transform="translate(72,-61.26)">
<text transform="matrix(1,0,0,-1,-71.95,63.6)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝛽</tspan>
</text>
</g>
</g>
</svg> for sparse Gaussian signals with <svg height="10.9125" id="M227" style="vertical-align:-0.17555pt" version="1.1" viewbox="0 0 58.537498 10.9125" width="58.537498" 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">𝑛</tspan>
<tspan style="font-size: 12.50px; " x="9.6773224" y="0">=</tspan>
<tspan style="font-size: 12.50px; " x="21.71771" y="0">2</tspan>
<tspan style="font-size: 12.50px; " x="27.969212" y="0">0</tspan>
<tspan style="font-size: 12.50px; " x="34.220711" y="0">0</tspan>
<tspan style="font-size: 12.50px; " x="40.47221" y="0">0</tspan>
</text>
</g>
</g>
</svg>, <svg height="10.9125" id="M228" style="vertical-align:-0.17555pt" version="1.1" viewbox="0 0 54.049999 10.9125" width="54.049999" 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">𝑚</tspan>
<tspan style="font-size: 12.50px; " x="12.340461" y="0">=</tspan>
<tspan style="font-size: 12.50px; " x="24.38085" y="0">4</tspan>
<tspan style="font-size: 12.50px; " x="30.632351" y="0">0</tspan>
<tspan style="font-size: 12.50px; " x="36.88385" y="0">0</tspan>
</text>
</g>
</g>
</svg>: comparisons in terms of SNR (dB) and number of iterations.</table>

Mathematical Problems in Engineering

Sparse Signal Recovery via ECME Thresholding Pursuits

Figure 5