The improved phase modulation method is used to numerically simulate a two-dimensional freak wave. While generating waves at specific positions, the spectral structure of target spectrum can also be maintained, and statistical characteristics wave sequences satisfied. numerical simulation process discussed in detail from perspective different spectra other parameters, priority applicability Joi...

The space target recognition algorithm, which is based on the time series of radar cross section (RCS), is proposed in this paper to solve the problems of space target recognition in the active radar system. In the algorithm, EMD method is applied for the first time to extract the eigen of RCS time series. The normalized instantaneous frequencies of high-frequency intrinsic mode functions obtai...

[1] The relationship between microwave imaging radar measurements of fluid velocities in the surf zone and shoaling, breaking, and broken waves is studied with field observations. Normalized radar cross section (NRCS) and Doppler velocity are estimated from microwave measurements at near-grazing angles, and in situ fluid velocities are measured with acoustic Doppler velocimeters (ADVs). Joint h...

Many missile–target simulation systems use random numbers to mimic the effects of a fluctuating target Radar Cross Section (RCS) in an attempt to minimise simulation times. In this paper a Genetic Algorithm is used to optimise the complexity of a pointscatterer model with a realistic radar cross section, ultimately allowing real measured data to be used in simulations. The performance of the ge...

nowadays, radar systems have many applications and radar imaging is one of the most important of these applications. inverse synthetic aperture radar (isar) is used to form an image from moving targets. conventional methods use fourier transform to retrieve doppler information. however, because of maneuvering of the target, the doppler spectrum becomes time-varying and the image is blurred. joi...

This paper reviews a number of different moment-based methods for estimating the parameters of the K distribution. The K distribution is a model for the statistics of synthetic aperture radar (SAR) imagery that is formed from the product of two independent distributions, one representing the radar cross-section, and the other representing speckle that is a characteristic of coherent imaging. A ...

Abstract The High-Altitude Imaging Wind and Rain Airborne Profiler (HIWRAP) dual-frequency conically scanning airborne radar provides estimates of the range-profiled mean Doppler backscattered power from precipitation surface. A velocity–azimuth display analysis yields near-surface horizontal wind vector υ h in cases which is present throughout scan. From surface return, normalized cross sectio...