Smooth Approximation <svg     style="vertical-align:-4.47127pt;width:14.3125px;" id="M1" height="21.65" version="1.1" viewBox="0 0 14.3125 21.65" width="14.3125"  xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg">
	
		
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</svg>-Norm Constrained Affine Projection Algorithm and Its Applications in Sparse Channel Estimation

<table>A typical sparse multipath channel.</table>

The Scientific World Journal

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Figure 2

Figure 2: Smooth Approximation <svg     style="vertical-align:-4.47127pt;width:14.3125px;" id="M1" height="21.65" version="1.1" viewBox="0 0 14.3125 21.65" width="14.3125"  xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg">
	
		
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			<g transform="matrix(.016,-0,0,-.016,6.088,21.4)"><path id="x30" d="M241 635q53 0 94 -28.5t63.5 -76t33.5 -102.5t11 -116q0 -58 -11 -112.5t-34 -103.5t-63.5 -78.5t-94.5 -29.5t-95 28t-64.5 75t-34.5 102.5t-11 118.5q0 58 11.5 112.5t34.5 103t64.5 78t95.5 29.5zM238 602q-32 0 -55.5 -25t-35.5 -68t-17.5 -91t-5.5 -105
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</svg>-Norm Constrained Affine Projection Algorithm and Its Applications in Sparse Channel Estimation 

The Scientific World Journal

Smooth Approximation -Norm Constrained Affine Projection Algorithm and Its Applications in Sparse Channel Estimation

Figure 2