This paper presents a method for generating volumetric clutter for air surveillance radar simulation. Complex
valued radar signal consists of magnitude and phase. In the presented simulation, radar clutter signal is created
from magnitude and phase distribution and then filtered imitating the radar signal formation. Radar geometry
can be integrated to the simulation by manipulating magnitude, phase, and phase difference distributions. Magnitude
is affected by range bin size and distance from radar. Also weather condition and polarization effect on
the signal. These can be controlled with adjustments to the distribution that the matrix is created from. This
solution offers a simple way to create background to realistic radar simulation. Different distributions are used
for signal magnitude and phase of various clutter sources. Typically, volumetric clutter source consists of many
evenly sized scatterers. Preliminary phase, originating from randomly distributed particles, can be considered
evenly distributed. Phase difference in long time, on the other hand, shows the radial movement of particles.
Therefore, phase difference can be modeled, for example, with Gaussian distribution and magnitude with Weibull
distribution, of course, depending on true environment. As an example, chaff is simulated with differing radial
wind.
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