Sparse Signal Recovery via ECME Thresholding Pursuits

<table>Sparse Laplacian signals with <svg height="10.9125" id="M275" style="vertical-align:-0.17555pt" version="1.1" viewbox="0 0 50.724998 10.9125" width="50.724998" 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">4</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>
</text>
</g>
</g>
</svg>, <svg height="10.9125" id="M276" style="vertical-align:-0.17555pt" version="1.1" viewbox="0 0 43.612499 10.9125" width="43.612499" 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">𝑘</tspan>
<tspan style="font-size: 12.50px; " x="10.239957" y="0">=</tspan>
<tspan style="font-size: 12.50px; " x="22.280346" y="0">2</tspan>
<tspan style="font-size: 12.50px; " x="28.531845" 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 12