The Distortion Characteristics of a Pulse Wave Propagating through Fog Medium at Millimeter Wave Band

Abstract

When a pulse wave propagates through fog, the effects of distortion, being severer at millimeter wave band, is caused by fog because of its dispersive property. The transfer function of a pulse signal is obtained by the theory of radio wave propagation; the complex envelope is deduced by the solution of Fourier integral. The broadening and compressing effects of a pulse wave are discussed. The variations of distortion effects with pulse-width, propagation distance and visibility of fog are found. As an example, the simulating and calculating results of distortion effects for Gaussian pulse at millimeter wave band are given.

Study of Parabolic Equation Method for Millimeter-Wave Attenuation in Complex Meteorological Environments

“…The relationship between visibility V (km) and liquid water content of fog W (kg/cm 3 ) is empirically given as [19] …”