Title :
A frequency extrapolation algorithm for FISC
Author :
Wang, Yuanxun ; Ling, Hao ; Song, Jiming ; Chew, Weng Cho
Author_Institution :
Dept. of Electr. & Comput. Eng., Texas Univ., Austin, TX, USA
fDate :
12/1/1997 12:00:00 AM
Abstract :
A frequency extrapolation algorithm for the fast multipole method (FMM)-based moment method code FISC (Fast Illinois Solver Code) is presented. Our approach is to parameterize the induced current on the target, which is available from the FISC solution based on a multipath excitation model. The ESPRIT super-resolution algorithm is applied to extract the time-of-arrival and amplitude parameters in the model. Once the frequency-dependent model of the induced current on the target is constructed, the induced current can be extrapolated to a broad band of frequencies and the multifrequency scattered field can be computed. The range profiles for a missile model are calculated in this manner to demonstrate the accuracy and performance of the algorithm
Keywords :
amplitude estimation; direction-of-arrival estimation; electric current; electromagnetic fields; electromagnetic induction; extrapolation; method of moments; multipath channels; radar computing; radar cross-sections; radar signal processing; radar target recognition; signal resolution; ESPRIT super-resolution algorithm; FISC; Fast Illinois Solver Code; accuracy; amplitude parameter; automatic target identification; computational complexity reduction; fast multipole method; frequency extrapolation algorithm; frequency-dependent model; induced current; missile model; moment method code; multifrequency scattered field; multipath excitation model; performance; radar cross sections; radar signature prediction; range profiles; target; time-of-arrival parameters; Electromagnetic scattering; Extrapolation; Frequency; MLFMA; Missiles; Moment methods; Optical scattering; Radar cross section; Radar scattering; Scattering parameters;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
