Comparing TM and TE music for point-like scatterers´ localization

In this paper we examine Time Reversal MUSIC (TRM) performance for two orthogonal polarizations: TM_z and TE_z. It is shown that if a little amount of noise corrupts the data there is an intrinsic limit on the number of scatterers that can be successfully detected. This number turns out to be the so-called number of degrees of freedom of the scattered field. Moreover, it is found that Time Reversal MUSIC performance changes depending on the considered polarization.