We deal with an approach based on Non-Uniform FFTs (NUFFTs) of type-3 and on a pruned FFT to efficiently computing the far-field radiated/scattered by volumetric sources/objects. The approach consists of three steps: 1) representation of 'non-uniformly sampled' Fourier exponentials by a finite number of 'uniformly sampled' ones, with such number controlling the accuracy; 2) 'pruned' FFT; 3) interpolation, again with controlled accuracy, of the 'uniformly sampled' exponentials onto the 'non-uniformly sampled' ones corresponding to the relevant observation directions. The computational performance of the approach is sketched
Pruned NUFFT-3 for far-field calculations / Capozzoli, A.; Curcio, C.; Liseno, A.; Piccinotti, J.. - (2018), pp. 2301-2302. (Intervento presentato al convegno 2018 IEEE Antennas and Propagation Society International Symposium and USNC/URSI National Radio Science Meeting, APSURSI 2018 tenutosi a The Westin Boston Waterfront, usa nel 2018) [10.1109/APUSNCURSINRSM.2018.8609099].
Pruned NUFFT-3 for far-field calculations
Capozzoli A.;Curcio C.;Liseno A.;
2018
Abstract
We deal with an approach based on Non-Uniform FFTs (NUFFTs) of type-3 and on a pruned FFT to efficiently computing the far-field radiated/scattered by volumetric sources/objects. The approach consists of three steps: 1) representation of 'non-uniformly sampled' Fourier exponentials by a finite number of 'uniformly sampled' ones, with such number controlling the accuracy; 2) 'pruned' FFT; 3) interpolation, again with controlled accuracy, of the 'uniformly sampled' exponentials onto the 'non-uniformly sampled' ones corresponding to the relevant observation directions. The computational performance of the approach is sketchedI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
