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Neural Network Emulation of the Integral Equation Model with Multiple Scattering
Department of Electronic Engineering, Sapienza University of Rome, via Eudossiana 18, 00184 Rome, Italy
* Author to whom correspondence should be addressed.
Received: 3 August 2009; in revised form: 29 September 2009 / Accepted: 12 October 2009 / Published: 15 October 2009
Abstract: The Integral Equation Model with multiple scattering (IEMM) represents a well-established method that provides a theoretical framework for the scattering of electromagnetic waves from rough surfaces. A critical aspect is the long computational time required to run such a complex model. To deal with this problem, a neural network technique is proposed in this work. In particular, we have adopted neural networks to reproduce the backscattering coefficients predicted by IEMM at L- and C-bands, thus making reference to presently operative satellite radar sensors, i.e., that aboard ERS-2, ASAR on board ENVISAT (C-band), and PALSAR aboard ALOS (L-band). The neural network-based model has been designed for radar observations of both flat and tilted surfaces, in order to make it applicable for hilly terrains too. The assessment of the proposed approach has been carried out by comparing neural network-derived backscattering coefficients with IEMM-derived ones. Different databases with respect to those employed to train the networks have been used for this purpose. The outcomes seem to prove the feasibility of relying on a neural network approach to efficiently and reliably approximate an electromagnetic model of surface scattering.
Keywords: neural networks; surface scattering; radar sensors
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Pulvirenti, L.; Ticconi, F.; Pierdicca, N. Neural Network Emulation of the Integral Equation Model with Multiple Scattering. Sensors 2009, 9, 8109-8125.
Pulvirenti L, Ticconi F, Pierdicca N. Neural Network Emulation of the Integral Equation Model with Multiple Scattering. Sensors. 2009; 9(10):8109-8125.
Pulvirenti, Luca; Ticconi, Francesca; Pierdicca, Nazzareno. 2009. "Neural Network Emulation of the Integral Equation Model with Multiple Scattering." Sensors 9, no. 10: 8109-8125.