INVESTIGATION OF INDOOR MILLIMETER WAVE PROPAGATION CHARACTERISTICS FOR FUTURE WIRELESS COMMUNICATION NETWORK USING RAY TRACING

Abstract

The demands for indoor location services are increasing due to rapid growth in the smart wireless systems with higher data rates. These systems require the development of indoor wireless networks with big data rate and high capacity demanding large bandwidth. Thus, there is growing interest in developing efficient and reliable indoor propagation model for future wireless systems in millimeter wave frequency ranges that have high available bandwidth. This work includes the investigation of the propagation characteristics of millimeter waves in indoor environment using ray tracing method at 60 GHz. In this thesis, the standard building type, second floor of Haramaya University Technology (HIT) campus building 412 was considered as specific site. The properties of objects inside building floor such as thickness, permittivity and conductivity are defined using a package in WinProp, a propagation modelling and simulation tool that help to define the scenario and building data bases based on deterministic modelling method. Subsequently, the wideband propagation characteristic parameters (path loss, received power, delay spread, power delay profile, and angle spread) with and without human body effects have simulated and analyzed. In the study, the propagation parameters are analyzed by considering absorption, reflection, and diffraction due to building structure and furniture’s, location of transceivers, antenna effect, and attenuation, and mobility of human beings in the offices, corridor, and stairwell. The outcomes identified the scale of channel parameters characteristics of the future wireless communication. The thesis has covered propagation characteristics for indoor environment and investigation of mm wave in LOS and NLOS scenarios using 3D Intelligent Ray Tracing a package in WinProp tool.