Thursday, April 1
4:30 - 5:30 PM
Room 1001 EECS
Abstract-
This seminar presents an overview of emerging satellite
systems. The
first part of the seminar focuses on mobile satellite
systems with
Iridium as a specific example. Iridium is a system
consisting of 66
satellites plus spares at a LEO orbit. This system is the
first global
mobile satellite system in operation. The satellites
perform onboard
processing and use intersatellite links to provide low
latency and
improved links. The goal of the Iridium system is to
complement the
coverage of terrestrial cellular systems.
The second part of the seminar is a brief overview of
broadband, fixed
service, satellite systems. In particular, the second part
will focus on
the Teledesic System. Teledesic consists of a constellation
288
satellites at a LEO orbit to globally provide fiber like
quality at
several Mbps information rates on the uplink. The
satellites also
perform onboard processing and use intersatellite links to
provide for a
very attractive, low latency end-to-end communications.
Following an overview of the Iridium System and the
Teledesic System,
the channel models are presented, and design issues are
considered.