Yazar "Ahmadin, Omar Mohamed Mohamed Ibrahim" seçeneğine göre listele

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    FM band channel measurements and modelling
    (İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2018) Ahmadin, Omar Mohamed Mohamed Ibrahim; Özdemir, Mehmet Kemal
    As the demand for higher data rates increases every day, the need for new frequency bands becomes more and more prominent. The FM band between 88 and 108 MHz is one of the bands that are not fully utilized. This band for now is being assigned for audio broadcast around the world, however, it is expected that more people will abandon the services offered at this band. The band is characterized by great features. For instance, it retains exceptional key characteristics such as propagation, which has a large coverage range and excellent through-buildings penetration. As FM coverage is so ever-present around the world, various applications can be considered to better exploit this useful band. Thus, investigating and obtaining the key channel parameters for the FM band for the possible two-way digital wireless systems, has become of significant interest. In this thesis, we present the results of field measurements at 86 MHz conducted at Gebze, Kocaeli, Turkey. Through the measurements, some of the FM channel characteristics are identified. Measurements are performed for urban, hilly terrain, and rural areas. Our results show that the FM channel expectedly has a large coverage area but at the same time, it possesses large channel excess delays. While most of COST-207 channel power delay profile models are also applicable for the FM Band, for urban environments and hilly terrain environments, channel clusters and excess delays are also higher than those of COST-207 models. As 5G systems aim to utilize lower frequency bands for supplementary links, FM Band can be considered as one of the potential bands and the channel models proposed in this study can then be exploited for performance analysis.