Sparse Cumulants Fitting for Direction-of-Arrival Estimation without Redundancy

<table>Spatial spectra of NR-SpCF and 4-MUSIC for underdetermined DOA estimation case, when <svg height="11.175" id="M141" style="vertical-align:-0.0pt" version="1.1" viewbox="0 0 45.0625 11.175" width="45.0625" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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</svg>, <svg height="14.3125" id="M142" style="vertical-align:-1.90608pt" version="1.1" viewbox="0 0 40.762501 14.3125" width="40.762501" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,11.4)"><path d="M745 361q0 -134 -83.5 -233t-214.5 -130l16 -11q97 -67 250 -132l-8 -23q-76 3 -131 16q-81 19 -242 125l-20 13q-129 8 -209 91t-80 208q0 160 116 271t289 111q136 0 226.5 -83t90.5 -223zM645 356q0 127 -57.5 201.5t-169.5 74.5q-126 0 -210.5 -104.5t-84.5 -248.5
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</svg>. The real DOAs are marked by the circles.</table>

International Journal of Antennas and Propagation

fig2

Figure 2

Figure 2: Sparse Cumulants Fitting for Direction-of-Arrival Estimation without Redundancy 