The Evaulation of the V and W Bands for Satellite Communications
Open AccessAbstract of ThesisThe Evaluation of a Radio Frequency Link (V and W Bands) for Satellite CommunicationsThis paper evaluates a two-way geostationary satellite communications link, operating in the V and W bands of the radio frequency spectrum (50 to 111 GHz). Currently, the V&W; band is not yet commercially available or heavily used, but types of recent applications or ongoing research projects using this frequency band are typically in radar systems, military tracking & targeting, and terrestrial wireless systems. The International Telecommunications Union (ITU) and commercial companies have a very high interest in operating in the V and W bands for satellite communications, since most of the older bands (for example: L, S, C, and K) are heavily used or congested.It is known that the quality of service when operating at frequencies above 3 GHz can be very poor (signal degradation). This impairment to the radio wave is caused by the earth atmosphere and other phenomena effects such as; gas attenuation, cloud and fog attenuation, rain attenuation, depolarization, and tropospheric scintillation. These major effects can be reduced by adjustments made at the satellite and earth station (HUB or VSAT). The goal for this research paper will be to investigate and determine the appropriate parameters for the geostationary satellite and earth station. Based on my assumptions, I will theoretically calculate and evaluate the signal links and compare my results with commercially available satellite services operating at lower frequencies. The key technical area of my research paper will include the following; satellite, earth station, radio frequency bands (Ku, Ka, V, and W), wavelength, effective isotropic radiated power (EIRP), power flux density ( PFD), antenna gain; free space path loss, power (transmit and received), system noise, elevation angle, attenuation models (gas, clouds, fog, rain, depolarization, and tropospheric scintillation), carrier-to-noise ratio, and bit error rate (BER) for digital modulation (BPSK and QPSK). The paper also includes the modification ITU-R P.676 Gaseous Attenuation Approximation Model and ITU-R P.618-8 Rain & Ice Depolarization Model to support the frequency at 90 GHz.
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Arredondo_gwu_0075M_11148.pdf | 2018-01-16 | Open Access |
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