Effects of troposphere on Earth - Space transmission links

摘要

New multimedia applications have appeared during the last decade and are becoming increasingly popular. In the past, the use of satellite for communications was mainly dedicated to TV broadcast and military applications; however interactive services based on both forward and return satellite links are available for some years and the marketing targets for these applications is mainly the people living in rural areas with no access to xDSL terrestrial infrastructures. Transmitting large amounts of data in (quasi) real-time requires high data rates and this increase in transmission velocity for both terrestrial and satellite services leads to a need for more and more frequency resources and to the development of new bandwidth-efficient coding and modulation schemes.