Naval Postgraduate School
Theses and Dissertations
Now showing items 11-20 of 65
A comparison of frequency offset estimation methods in Orthogonal Frequency Division Multiplexing (OFDM) systems
(Monterey California. Naval Postgraduate School, 2004-12)
OFDM is a modulation technique that achieves high data rates, increased bandwidth efficiency and robustness in multipath environments. However, OFDM has some disadvantages, such as sensitivity to channel fading, large peak ...
A novel approach to modeling the effects of radiation in Gallium-Arsenide solar cells using Silvaco's atlas software
(Monterey, California. Naval Postgraduate School, 2004-09)
The effects of radiation in GaAs solar cells has been extensively researched and the results of numerous investigation have yielded a considerable amount of information about the degradation in irradiated solar cells. This ...
Performance analysis of wireless LAN signals transmitted over a ricean fading channel in a pulsed-noise preference environment
(Monterey California. Naval Postgraduate School, 2004-09)
This thesis examines the performance of the waveforms specified by the IEEE 802.11a wireless local area network standard when the signal is transmitted over a Ricean fading channel with AWGN and pulsed-noise interference. ...
A comparison of timing methods in orthogonal frequency division multiplexing (OFDM) systems
(Monterey California. Naval Postgraduate School, 2004-09)
Orthogonal frequency division multiplexing (OFDM) is being used by wireless local area network (WLAN) standards, such as IEEE 802.11a, and wireless metropolitan area network (MAN) standards, such as IEEE 802.16a. OFDM is ...
An evaluation of management techniques for SONET/SDH Telecommunication networks
(Monterey California. Naval Postgraduate School, 2004-09)
A study of SONET network management applications and the load they impart to the network is conducted to provide a better understanding of the capability of various management approaches. In this study, a SONET network is ...
Evaluation and testing of the Naval Postgraduate School Satellite (NPSAT1) Solar Cell Measurement System
(Monterey California. Naval Postgraduate School, 2004-09)
The Naval Postgraduate School Spacecraft Architecture and Technology Demonstration Satellite, NPSAT1, launching in the fall of 2006, will include a system to measure the performance of new experimental triplejunction solar ...
Implementation of a quaternion-based Kalman filter for human body motion tracking using MARG sensors
(Monterey California. Naval Postgraduate School, 2004-09)
"Human body motion tracking using inertial sensors requires an attitude estimation filter capable of tracking in all orientations. One way to represent orientation is to use Euler angles, but they have singularities and ...
Simulating radiation-induced defects on semiconductor devices
(Monterey California. Naval Postgraduate School, 2004-09)
Exploring semiconductor lifetime, reliability and performance is a never-ending science for today's modern electronics. One significant problem that affects all of these areas is radiation-induced damage. Making calculations ...
NPSAT1 magnetic attitude control system algorithm verification, validation, and air-bearing tests
(Monterey California. Naval Postgraduate School, 2004-09)
NPSAT1 is a gravity-gradient friendly, prolate body designed to fly at 600 Å 40 km inclined to 34.5 degrees. The satellite uses a magnetic 3-axis active attitude control system (ACS) using magnetic torque rods that interact ...
Kill vehicle effectiveness for boost phase interception of ballistic missiles
(Monterey, California. Naval Postgraduate School, 2004-06)
Boost phase interception of ballistic missiles is envisioned as the primary response of the layered defense architecture implemented in the ballistic missile defense system. A limited time frame in which to take action and ...
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