Abstract:

A new method is proposed to estimate the parameters of damped sinusoids (poles) utilizing scattering responses data in frequency domain. Scattering responses of the frequency band in resonance region are calculated by the method of moments (MoM), and transient scattering responses are obtained using a fast inverse Fourier transform. The influence of poles number unknown and distinguishing early time and late time transient responses on poles extraction is investigated. Then a modified total least square matrix pencil method (MTLS MPM) is presented and verified by two simulation examples of thin wire and aircraft. Poles results of them extracted for frequency domain data in different azimuth show that the new method is more convenient and precise in practice.