High Accuracy 2D-DOA Estimation for Conformal Array Using PARAFAC

<table>(a) The distance vector <svg height="15.7" id="M64" style="vertical-align:-3.276pt" version="1.1" viewbox="0 0 27.737499 15.7" width="27.737499" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,11.55)"><path d="M600 0h-557v24l268 633l28 8l261 -641v-24zM497 50l-194 489l-196 -489h390z" id="x394"></path></g><g transform="matrix(.017,-0,0,-.017,10.959,11.55)"><path d="M16 651v25h315q130 0 199.5 -46t69.5 -135q0 -60 -33.5 -104.5t-95.5 -67.5q-29 -11 -71 -16q-30 -2 -138 -4v-192q0 -51 14 -65q13 -13 73 -21v-25h-333v25q33 3 45 9q23 9 31 29t8 63v427q0 59 -16 75q-15 18 -68 23zM262 606v-268q95 2 130 32q36 32 36 114
q0 84 -27 120.5t-89 36.5q-50 0 -50 -35z" id="x1D40F"></path></g>
<g transform="matrix(.012,-0,0,-.012,21.35,15.637)"><path d="M384 0h-275v27q67 5 81.5 18.5t14.5 68.5v385q0 38 -7.5 47.5t-40.5 10.5l-48 2v24q85 15 178 52v-521q0 -55 14.5 -68.5t82.5 -18.5v-27z" id="x31"></path></g>
</svg>. (b) The distance vector <svg height="15.7" id="M65" style="vertical-align:-3.276pt" version="1.1" viewbox="0 0 27.737499 15.7" width="27.737499" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,11.55)"><path d="M600 0h-557v24l268 633l28 8l261 -641v-24zM497 50l-194 489l-196 -489h390z" id="x394"></path></g><g transform="matrix(.017,-0,0,-.017,10.959,11.55)"><path d="M16 651v25h315q130 0 199.5 -46t69.5 -135q0 -60 -33.5 -104.5t-95.5 -67.5q-29 -11 -71 -16q-30 -2 -138 -4v-192q0 -51 14 -65q13 -13 73 -21v-25h-333v25q33 3 45 9q23 9 31 29t8 63v427q0 59 -16 75q-15 18 -68 23zM262 606v-268q95 2 130 32q36 32 36 114
q0 84 -27 120.5t-89 36.5q-50 0 -50 -35z" id="x1D40F"></path></g>
<g transform="matrix(.012,-0,0,-.012,21.35,15.637)"><path d="M412 140l28 -9q0 -2 -35 -131h-373v23q112 112 161 170q59 70 92 127t33 115q0 63 -31 98t-86 35q-75 0 -137 -93l-22 20l57 81q55 59 135 59q69 0 118.5 -46.5t49.5 -122.5q0 -62 -29.5 -114t-102.5 -130l-141 -149h186q42 0 58.5 10.5t38.5 56.5z" id="x32"></path></g>
</svg>.</table>

International Journal of Antennas and Propagation

High Accuracy 2D-DOA Estimation for Conformal Array Using PARAFAC

Figure 3