ABSTRACT
Nowadays, many wireless communication applications and services demand high capacity and bandwidth. Experts expect that in next few years, communications markets need to use high data rates up to 40 Gbps. For meeting the requirements of high data rate, bands up to 3 THz hold promise as they can achieve data rates up to a few tens of Gbps. The bands ranging from 275 to 3,000 GHz are known as terahertz (THz) bands. THz bands are not assigned yet globally for dedicated services and communication applications. The implementation of THz communication requires various kinds of evaluations and effort in order to assess different aspects related to channel characterizations, THz system designs, propagation, algorithms and techniques for signal processing, platform configurations, in addition to security and privacy issues. The evaluation and assessment should also consider the statistical parameters and measurements of the channels. This chapter introduces the key aspects of THz channel specifications and related considerations. In addition, a comparison between mm-waves and THz channel characteristics is made. The chapter also discusses the theoretical concepts of THz channel characterizations, limitations, requirements, and methodologies for measurements including a comparison between different channel analyses. Moreover, the chapter provides a brief description of THz channel characterization in nano communications.
