Millimeter-Wave Wireless Communication Systems: Theory and Applications

A study of the effect of diffraction and rough surface scatter modeling on ray tracing results in an urban environment at 60 GHz

“…Not only is the LOS component considerably strong at these points, but also due to the small grazing angles of reflected paths, the roughness factor that the reflection coefficient is multiplied by is close to one (see (1), (2) and (3)) and therefore surface roughness does not greatly impact the power of reflected components.…”

“…This parameter is defined as the shortest distance between two points with zero cross correlation of height. For rough surfaces, the Fresnel coefficient is multiplied by a roughness correction factor, s ρ as shown in (1), (2) and (3), to…”

“…With the evergrowing demand for higher bit-rates, though, attention has been shifted to higher less constipated frequency bands, namely the millimeter wave band, specifically a newly unlicensed bandwidth around 60 GHz announced in a large part of the world [2]. The smaller wavelengths at these frequencies along with certain characteristics of propagation, including oxygen absorption, result in significantly different over-all channel responses for these frequencies in comparison to the much researched UHF and UWB bands; therefore necessitating the development of new models or modification of previous ones to meet the needs of a channel model for millimeter wave frequencies.…”

Integrated dual-wavelength semiconductor laser systems for millimeter wave generation

“…Millimeter-wave frequencies (30 GHz -300 GHz) have attracted great interest from industries involved in the development of broadband wireless communication systems because they can provide short range communications with data rates above 1 Gbp/s [1,2]. Furthermore, millimeter waves can be exploited for surveillance aims [3] and for microcrack detection in concrete structures [4].…”

Interference control using polarization in directive 60 GHz mesh networks

“…A directive mesh network operating in the unlicensed millimeter wave band (60 GHz) can provide a suitable alternative for small cell backhaul support [2]. The wide unlicensed bandwidth available at this frequency (up to 7 GHz allocated worldwide [3]) allows for the high bit rates required for backhaul implementation and the highly directive antennasthat are available in sizes as small as 30 cm in diameter [4] -effectively suppress interference and increase network capacity through vigorous spatial reuse.…”