ABSTRACT
This chapter presents a brief survey of the millimeter-wave (mmW) channel models and some aspects of mmW communications. Some of the identified frequency bands for mmW communication are around 28 GHz, 38 GHz, 60 GHz, 73 GHz, and E-band. Wireless communication is also looking to be a substitute for the multigigabit fiber-optic communication systems specially in the places where laying optical fiber networks are cost ineffective. The success of both high spectral efficiency technologies and extreme network densification depends on the accuracy wireless channel model used. The amount of atmospheric attenuation varies greatly with frequency in the 25 to 100 GHz frequency range. The main feature of propagation at mmW wavelengths is the so-called “quasi-optical” nature of the rays due to higher frequencies. mmW is extremely susceptible to be blocked by humans, objects, and building, due to its poor diffraction properties.
