Terahertz band channel properties according to transmit power estimation
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Terahertz band channel properties according to transmit power estimation Mustafa Alper Akkas¸1
Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Over the last decade, short-range communications in the THz (Terahertz) band have been extensively studied as a technology-enabler for dense and ultra-dense wireless networks. The increasing demand for high data rates for wireless communication systems will inevitably lead to the extension of operation frequencies with larger bandwidths. THz range enables bandwidths on the order or hundreds of GHz. Thus, THz Band communication will alleviate the capacity limitations and spectrum scarcity of current wireless systems, and enable new classical networks and novel nanoscale networks applications. The main aim of this paper is to provide design guidelines for close proximity links with transmission capacity beyond 100 Gbit/s. We present the path loss, absorption loss, signal to noise ratio (SNR) and capacity of propagating electromagnetic waves at THz Band in different air medium types. The channel capacity and SNR properties are calculated according to transmit power estimation. In this paper, five air medium types are investigated which are average latitude—summer, high latitude—summer, average latitude—winter, high latitude—winter and tropics. Keywords Terahertz band Transmit power Capacity Signal-to-noise ratio
1 Introduction Humanity becomes increasingly dependent on information transmission and deployment of wireless communication systems for a multitude of new applications is accompanied by an increasing need for higher data rates [1]. The data rates of wireless communication have been increasing twofold every 18 months over the last 3 decades [2]. The terahertz (THz) band which is a promising frequency range for the next generation ultra-dense wireless networks can answer the problem of increasing need for higher data rates [3, 4]. Figure 1a shows the link budget for sending data in air medium. Figure 1b shows Terahertz (THz) wireless data communication applications for the Terahertz (THz) wireless data communication. Air molecules vibrates at THz range. Each molecule vibration changes according to THz range so when modeling, each molecules that form the & Mustafa Alper Akkas¸ [email protected] 1
Department of Computer Engineering, Bolu Abant I˙zzet Baysal University, Bolu 14280, Turkey
medium where THz wave propagate have to be considered. THz waves absorption increases at the vibration parts of the molecules. As a result, i every component of the air has been thought has been considered in this paper [3, 4]. PRX ðdBmÞ ¼ PTX ðdBmÞ þ G ðdBiÞ L ðdBÞ
ð1Þ
Equation (1) shows the link budget equation for a radio communications system. In Eq. (1) PRX is received power decibel-milliwatts (dBm), PTX is transmitter output power (dBm), G is gain which can be transmitter and receiver antenna gain decibels-isotropic (dBi) and L is losses which can be free space loss, path loss, miscellaneous s
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