Experimental studies of communication channel bandwidth of millimeter wave range indoors

Abstract

There is a rapid development of technologies worldwide that have access to the Internet, independently exchange data, and upload collected information to cloud storage. Every year, the amount of data transmitted from things and people on the Internet is approximately two zettabytes. The volume of data on the Internet is constantly growing. According to the Internet Live Stats service, more than 50,000 search queries are made on Google every second, 120,000 videos are viewed on YouTube, and almost 2.5 million e-mails are sent. Therefore, it is expedient to implement the fifth generation of communication, which will work in the millimeter range. Promising technologies for building 5G and its implementation include small base stations, which are analogs of conventional mobile network base stations. Within settlements, small base stations should be located short distances from each other (approximately 250 meters). From such parameters, it can be concluded that it will be necessary to use thousands of such stations to cover even a small city, forming a single network that will transmit data to 5G users. Among the advantages, it can be noted that due to the small size of the antennas, they can be placed on any elements of structures and buildings (for example, on the walls of buildings, pillars, etc.) without additional obstacles. The paper presents and investigates the bandwidth of the millimeter wave range indoor communication channel. The structure of the modem and the format of the control command, the dependence of the transmission speed C on the length of the radio line of the IEEE 802.11ad 60 GHz communication system in point-to-point mode (Indoor LOS) and (Indoor NLOS) are presented. In work, there are theoretical assessments of the achievable data transfer rates based on the bandwidth of the Shannon communication channel and practically possible data transfer rates for various segments of the information transfer network for the IEEE 802.11ad standard equipment using different modulation and coding schemes (MCS).