Subband synthesis method for simulation of wideband radar clutter

A strategy of physical model based subband synthesis method for simulating ground clutter of wideband radars is studied in this paper. This method uses a general facet model to obtain subband echo contributions of a highly correlated segment of ground surface based on the observation that less randomness remains in a high-resolution cell. Such a segment consists of only a predominant reflector plus a complex random scatter from other weak factors. Then the subband contributions are synthesized to form the simulated clutter data of all resolution cells within the facet. Overlap scheme is used to smooth sudden change across adjacent facets. Because the subband scattering of different facet shapes have different types of frequency dependence, the proposed method is able to keep more detailed information of ground surface structure, resulting in a potential to give a high-fidelity clutter simulation.