Birth of satellite communications 1/11 Communications satellites may be used for many applications: • relaying telephone calls • providing communications to remote areas of the Earth, • TV direct-to-user broadcasting • providing communications to …
Satellites are specifically made for telecommunication purpose. They are used for mobile applications such as communication to ships, vehicles, planes, hand -held terminals and for TV and radio broadcasting. They are responsible for providing these services to an assigned region (area) on the earth.
Satellite Communications Architecture • Identify Requirements • Specify Architectures • Determine Link Data Rates • Design & Size each link • Document your rationale
Communication Satellite: Orbit and Description: A Brief history of satellite Communication, satellite Frequency Bands, Satellite Systems, Applications, Orbital Period and Velocity, effects of orbital Inclination, Azimuth and Elevation, Coverage angle and slant Range, Eclipse, Orbital
Satellite Communications Terminology 1. Ground station (also “ground terminal”) sends signals to/receives signals from a satellite 2. Modulator, demodulator (modulator + demodulator = modem) Ground station component: modulator converts digital “1”s and “0”s to a radio frequency signal (modulated carrier) that can be transmitted
Communication Satellite: Orbit and Description: A brief History of Satellite Communication, Satellite Frequency bands, Satellite Systems, Applications, Orbital Period and Velocity, Effects of Orbital inclination, Azimuth and Elevation, Coverage and Slant
Reproduction of figures extracted from the 1990 Edition of CCIR Volumes (XVIIth Plenary Assembly, D€usseldorf, 1990), the Handbook on Satellite Communications (ITU Geneva, 1988) and the ITU-R Recommendations is made with the authorisation of the International Telecommunication Union (ITU) as copyright holder.