Sparse Adaptive Channel Estimation Based on <svg xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg" style="vertical-align:-6.80586pt;width:16.0875px;" id="M1" height="25.5" version="1.1" viewBox="0 0 16.0875 25.5" width="16.0875">
	
		
			<g transform="matrix(.022,-0,0,-.022,.062,16.025)"><path id="x1D459" d="M238 681l-124 -585q-7 -31 4 -31q10 0 37.5 18.5t49.5 41.5l16 -22q-40 -48 -89.5 -81.5t-76.5 -33.5q-42 0 -16 122l105 488q7 32 0 41t-39 9h-35l5 26q35 3 71 13t58 17.5t26 7.5q14 0 8 -31z"></path></g>

			<g transform="matrix(.016,-0,0,-.016,6.088,21.4)"><path id="x1D45D" d="M570 304q0 -108 -87 -199q-40 -42 -94.5 -74t-105.5 -43q-41 0 -65 11l-29 -141q-9 -45 -1.5 -58t45.5 -16l26 -2l-5 -29l-241 -10l4 26q51 10 67.5 24t26.5 60l113 520q-54 -20 -89 -41l-7 26q38 28 105 53l11 49q20 25 77 58l8 -7l-17 -77q39 14 102 14q82 0 119 -36
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</svg>-Norm-Penalized Affine Projection Algorithm

<table>Typical sparse multipath communication system.</table>

International Journal of Antennas and Propagation

fig1

Figure 1

Figure 1: Sparse Adaptive Channel Estimation Based on <svg xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg" style="vertical-align:-6.80586pt;width:16.0875px;" id="M1" height="25.5" version="1.1" viewBox="0 0 16.0875 25.5" width="16.0875">
	
		
			<g transform="matrix(.022,-0,0,-.022,.062,16.025)"><path id="x1D459" d="M238 681l-124 -585q-7 -31 4 -31q10 0 37.5 18.5t49.5 41.5l16 -22q-40 -48 -89.5 -81.5t-76.5 -33.5q-42 0 -16 122l105 488q7 32 0 41t-39 9h-35l5 26q35 3 71 13t58 17.5t26 7.5q14 0 8 -31z"></path></g>

			<g transform="matrix(.016,-0,0,-.016,6.088,21.4)"><path id="x1D45D" d="M570 304q0 -108 -87 -199q-40 -42 -94.5 -74t-105.5 -43q-41 0 -65 11l-29 -141q-9 -45 -1.5 -58t45.5 -16l26 -2l-5 -29l-241 -10l4 26q51 10 67.5 24t26.5 60l113 520q-54 -20 -89 -41l-7 26q38 28 105 53l11 49q20 25 77 58l8 -7l-17 -77q39 14 102 14q82 0 119 -36
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</svg>-Norm-Penalized Affine Projection Algorithm 

International Journal of Antennas and Propagation

Sparse Adaptive Channel Estimation Based on -Norm-Penalized Affine Projection Algorithm

Figure 1