Amedeo Capozzoli

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In recent years, unconventional applications ranging from biomass estimation, to the detection and location of targets hidden beneath the foliage or even to the full reconstruction of three-dimensional (3D) SAR images of vegetation have earned an increasing interest for both civil and military purposes. SAR tomography allows to access such information on(More)
We discuss the performance of two acceleration data structures for electromagnetic ray-tracing on GPU using the CUDA language, namely the kD-tree and the SBVH. Our implementations have been based on the approach by NVIDIA which accounts for the programming optimizations possible for the latest version of CUDA and NVIDIA GPU architectures.
—The paper deals with the problem of reconstructing the height of forests from polarimetric/multi-baseline SAR data. The approach consists of optimizing an objective functional defined as the distance between the measured data and the data predicted by the model at the actual estimate of the unknowns. We indicate the role of global optimization on the(More)
In this letter, a Photonic True Time Delay (PTTD) unit for phased array antennas is experimentally demonstrated. The PTTD unit, employing a single wavelength laser source, exploits the distributed photonic bandgap offered by a Linearly Chirped Fiber Bragg Grating (LCFBG) to attain different time delays by properly actuating the physical and geometrical(More)
—We provide a sufficient condition to select the parameters of Type 3 Non-Uniform Fast Fourier Transform (NUFFT) algorithms based on the Gaussian gridding to fulfill a prescribed accuracy. This is a problem of significant interest in many areas of applied electromagnetics, as for example fast antenna analysis and synthesis and fast calculation of the(More)
A new approach to estimate the support of a source and/or scattering system from radiated and/or scattered (single frequency and single view) field data on a given observation plane is presented for the 3D geometry. The approach is based on the recently introduced local field properties PSSC and LSC and represents a significant and nontrivial extension of(More)
We discuss one of the computationally most critical steps of the Phase-Only synthesis of aperiodic reflectarrays, namely the fast evaluation of the radiation operator. We present its implementation by using a 2D Non-Uniform FFTs (NUFFTs) of NED (Non-Equispaced Data) type on Graphic Processing Units (GPUs) in Compute Unified Device Architecture (CUDA)(More)
—The problem of characterizing random sources from near-field measurements and of devising the random field sampling procedure is tackled by a stochastic approach. The presented technique is an extension of that introduced in [22] and successfully adopted to experimentally characterize deterministic (CW and multi-frequency) radiators and fields. Under the(More)