Polarization consideration in characterizing radio wave propagation in urban microcellular channels

Abstract

In this work, the polarization dependence of multipath propagation is investigated for an out of sight side-street in an urban microcellular environment. The investigation is model based. The received power of vertically polarized signals is larger than that of horizontally polarized ones in both narrow and wideband transmission and reception. The fast fading in the vertically co-polarized wave propagation is higher than that of the horizontal polarization. The power delay profiles (PDF) of the two linear polarizations are similar at locations near the junction in the side-street. Considerable difference in the PDF of the two linear polarizations is noticed at larger distance down the side street. The peak value of the power delay profile provides a reasonable estimate of the received signal power in both linear polarizations. At large distance down the side street, the root mean square (RMS) of the vertical polarization PDF is lower than that of the horizontal polarization PDF. The peaks of the horizontal polarization local power delay profiles are more suppressed than their corresponding in the vertical polarization at a large distance.