Title page for ETD etd-12232009-020026
|Type of Document
||Jones, S. J.
||The application of the systems engineering process to the development of a global communications system using portable phones
||Master of Engineering
|Pratt, Timothy J.
|Blanchard, Benjamin S. Jr.
- Telecommunication systems
|Date of Defense
Telecommunications capabilities have increased
dramatically in recent years. Especially significant is the
introduction and tremendous growth of mobile telephone
communications. Given the limitations of current mobile
phone communications and the need for truly global person-to-
person capabilities, an enhanced satellite-based system
is presented as a feasible means to link portable telephones
throughout the world.
Using systems engineering and the systems approach, the
choice of using a satellite system vice other methods is
made from a feasibility analysis. Following this choice,
operational requirements are established. Based upon these
requirements, two different satellite constellations are
presented for consideration: a three-satellite
geosynchronous constellation and a multi-satellite low earth
orbiting (LEO) constellatIon. The advantages and
disadvantages of each configuration are explored and the LEO
constellation is chosen. Throughout the paper, systems
engineering and its methodologies are used to illustrate how
such a system might be developed using the systems approach.
|| Approximate Download Time
| 28.8 Modem
|| 56K Modem
|| ISDN (64 Kb)
|| ISDN (128 Kb)
|| Higher-speed Access
next to an author's name indicates that all
files or directories associated with their ETD
are accessible from the Virginia Tech campus network only.
If you have questions or technical
problems, please Contact DLA.