Estimating the time-delay and frequency decay parameter of scattering components using a modified MUSIC algorithm

1 January 1994

journal article
Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Antennas and Propagation

Vol. 42 (10) , 1412-1418
https://doi.org/10.1109/8.320748

Abstract

A superresolution technique to determine the time-delay and frequency response of individual components of electromagnetic scattering is presented. A modification of the MUltiple SIgnal Classification (MUSIC) algorithm is proposed for the data model which includes scattering components with frequency dependent amplitudes. The modified technique is based on pre-multiplying the scattering data by the inverse of an assumed frequency dependence parameterized by a variable /spl alpha/. Estimates of /spl alpha/ are then obtained by considering the roots of the root-MUSIC polynomial for various /spl alpha/. The algorithm is tested for simulated and experimental compact range data. For the example of measured scattering from a diagonal flat plate, different decay parameters corresponding to the single and double diffraction components are determined using the new algorithm.

Keywords

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