Title :
Assessment of Millimeterwave Propagation over Sea by Experiment and Simulation
Author :
Essen, Helmut ; Fuchs, H.-H. ; Pagels, A. ; Stanko, Stephan ; Forster, J. ; Fabbro, V. ; Duvenot, R.
Author_Institution :
FGAN Res. Inst. for High Freq. Phys. & Radar Tech., Wachtberg
Abstract :
To be able to assess the capability of maritime radars under different conditions at differing radar bands simulation programs for the refractivity profile of the atmosphere and the wave propagation, based upon a solution of the parabolic equation have been developped. These have been used to model the propagation for a series of measurements which have been conducted using an experimental radar operating simultaneously at frequencies of 10 GHz, 35 GHz and 94 GHz against reference reflectors onboard a vessel for outbound and inbound courses. Simultaneously environmental measurements using wavebuoys and meteosonds have been conducted to generate a complete data set. Moreover an approach was initiated to retrieve the vertical profile of the refractive index from sea clutter data by an inversion method. The method is based on the LS-SVM (Least-Squares Support Vector Machines) theory. The paper describes the experimental approach and the simulation methods. Results of simulations retrieved from the classical method and the new inversion approach are compared.
Keywords :
least mean squares methods; parabolic equations; radar clutter; radiowave propagation; refractive index; support vector machines; frequency 10 GHz; frequency 35 GHz; frequency 94 GHz; least-squares support vector machines theory; maritime radars; millimeterwave propagation assessment; parabolic equation; radar bands simulation programs; refractive index; sea clutter data; wave propagation; Inverse Methods; Millimeterwaves; Propagation over Sea; Simulation;
Conference_Titel :
Antennas and Propagation, 2007. EuCAP 2007. The Second European Conference on
Conference_Location :
Edinburgh
Print_ISBN :
978-0-86341-842-6