Performance Analysis of SC-FDE Considering Radiation Pattern in Millimeter-wave and Terahertz Broadband Communications

With the growing demand for wireless mobile services and the development of fifth- and sixth-generation mobile communication systems, the throughput analysis of broadband wireless transmission in extremely high-frequency bands is becoming increasingly important. This study investigates the system capacity of millimeter-wave (mmWave) and terahertz (THz) broadband communications considering delayed waves and radiation patterns, as well as the molecular absorption and rain attenuation. In our performance evaluation, single-carrier with frequency domain equalization (SC-FDE) is adopted as a practical transmission method for extremely high-frequency bands, and the 3GPP technical report (TR) 38.901 is used as the channel and antenna model to evaluate the impact of delay spread and radiation pattern. Compared with the case of an isotropic antenna, the proposed method incorporates the frequency selectivity and directionality into the performance evaluation according to the line-of-sight (LoS) and non-line-of sight (NLoS) conditions.