A. Moghaddar et al., ESTIMATING THE TIME-DELAY AND FREQUENCY DECAY PARAMETER OF SCATTERINGCOMPONENTS USING A MODIFIED MUSIC ALGORITHM, IEEE transactions on antennas and propagation, 42(10), 1994, pp. 1412-1418
A superresolution technique to determine the time-delay and frequency
response of individual components of electromagnetic scattering is pre
sented. A modification of the MUltiple SIgnal Classification (MUSIC) a
lgorithm is proposed for the data model which includes scattering comp
onents with frequency dependent amplitudes. The modified technique is
based on pre-multiplying the scattering data by the inverse of an assu
med frequency dependence parameterized by a variable alpha. Estimates
of a are then obtained by considering the roots of the root-MUSIC poly
nomial for various alpha. The algorithm is tested for simulated and ex
perimental compact range data. For the example of measured scattering
from a diagonal flat plate, different decay parameters corresponding t
o the single and double diffraction components are determined using th
e new algorithm.