UP	Paper 1859	US-M-A	DOWN
On The Determination of Satellite Capacity Loss Due to Channel Estimates for Dynamic Bandwidth Allocation in a Peer-To-Peer MF-TDMA Network
Gonzalez,Lino		Johns Hopkins University Applied Physics Laboratory
Army tactic to an expanding more mobile battlefield has created a demand for a highly mobile network centric communication systems that provide peer-to-peer communications. To enable this network connectivity over SATCOM requires a sophisticated resource scheduling of satellite resources. The challenge with this new method of satellite utilization is to maximize capacity by dynamically allocating just enough resources between user terminals. Various dynamic bandwidth allocation algorithms have been proposed to optimize ephemeral satellite links. But ultimately the determination of signal to noise and individual transmitter and receiver channel conditions must be accurately determined. The NC requires this information to account for all simultaneous transmitters to make certain that aggregate network power is within allocation and that each established link meets its intended bit-error-rate (BER). The accuracy of the channel estimates will introduce approximations and certainly will result in reduction in capacity. This paper will examine the satellite link variables and the impacts of these on overall capacity.
Lino Gonzalez received his MS in Electrical Engineering from Monmouth University in 1997. For the past 14 years he has provided direct system engineering support to the US Army Program Executive Office PM MILSTAR, PM MILSATCOM and PM WIN-T. He has served as the systems engineer on the Army SCOTT, SCAMP, KaSAT and Phoenix terminal programs. His area of expertise is in Military satellite communication systems such as MILSTAR, UFO, GBS and GAPFILLER. Before joining the Johns Hopkins University Applied Physics Laboratory he worked at the Bendix Corporation and BAE Systems. Vijitha Weerackody received his Ph.D. in electrical engineering from the University of Pennsylvania in 1989. His area of expertise is in signal processing and communication systems. Before joining the Johns Hopkins University Applied Physics Laboratory he worked at the Research Divisions of AT&T Bell Laboratories and Telcordia Technologies. Dr. Weerackody serves as an adjunct Associate Professor of Electrical and Systems Engineering at the University of Pennsylvania, Philadelphia, PA.