Impact of Different Modulation Schemes on Millimeter Wave Cellular Systems

This thesis examined the wireless millimeter Wave (mmWave) communication systems which utilize frequency range from 30 GHz to 300 GHz as a candidate of the fifth generation (5G) system. The 5G systems still undergo some problems such as hardware component that improves system efficiency where the following major setbacks are highlighted: very high path loss, shadowing, amplifier non-linearity and phase noise. In this study, using a set of simulations are illustrated in engaging vast bandwidth at mmWave frequencies by Frequency Shift Keying (FSK), the two first mentioned problems, path loss and shadowing, can be relieved while it will not be helpful to tackle amplifier non-linearity and phase noise. In this regard, extensive simulations were conducted and some parameters relating to the influence of the four mentioned problems at mmWave frequencies were defined. The results of this study show an improved performance of non-coherent FSK compared with the other types of modulations like Quadrature Amplitude Modulation (QAM) and Phase Shift Keying (PSK) modulation. Association of this achievement with the relatively slight complexity of non-coherent FSK in terms of the aspect of detection makes it good enough to attain elevated Gbps wireless links at mmWave frequencies. Additionally, as a suitable tool for examination and validation purposes, this suggested simulation can be engaged for assessment of the performance of a broad range of mmWave systems, practically. Keywords: MmWave, 5G, MIMO, Mobile communication, Path-loss.