Naval Postgraduate School
Theses and Dissertations
Now showing items 1-10 of 32
An electromagnetic interference analysis of uninterruptible power supply systems in a data processing environment
(Monterey, Calif. Naval Postgraduate School, 2002-12)
The levels of Electromagnetic Interference (EMI) generated by two standard models of Uninterruptible Power Supplies (UPS) were examined. Conducted current measurements were made on all conductors exiting and entering two ...
High energy lasers for ship-defense and maritime propagation
(Monterey California. Naval Postgraduate School, 2002-12)
High Energy Lasers (HELs) are a new class of weapons that may be of great value to the Navy in the near future. A high-power Free Electron Laser (FEL) is being designed using short Rayleigh-length resonators to increase ...
Free electron and solid state lasers development for naval directed energy
(Monterey California. Naval Postgraduate School, 2002-12)
A MW level FEL is being designed with a short a Rayleigh length resonator to increase the spot size at the mirrors and to avoid mirror damage. In this thesis, it is found that it is desirable to focus the electron beam to ...
Theoretical development, design and testing of a magnetic fuel cell
(Monterey, Calif. Naval Postgraduate School, 2002-12)
A magnetic fuel cell uses high-pressure gas to cause a time-dependant change in magnetic field to generate a voltage based upon Faraday's Induction Law. In this thesis, the use of a compressed magnetic gas passing through ...
Performance evaluation of a cooperative diversity enhanced ad hoc network
(Monterey, California. Naval Postgraduate School, 2002-12)
Currently wireless multi-hop ad hoc networks utilize protocols that relay packets of data node-by-node along a path connecting the source node to the sink node. This thesis describes a new methodology called "Cooperative ...
Design of microstrip patch antenna for the NPSAT1
(Monterey, Calif. Naval Postgraduate School, 2002-12)
This thesis presents the design of two circularly polarized patch antennas for operation at 1.767 GHz and at 2.207 GHz (for receiving and transmitting, respectively) on NPSAT1 satellite. The design requirements for the ...
Face recognition using infrared imaging
(Monterey, California. Naval Postgraduate School, 2002-12)
This study investigated a (IR) face recognition system using an uncooled IR camera. A computer-based image collection set-up was designed and used to create a small database of 420 facial images, from 14 volunteers. Man-ual ...
Performance of IEEE 802.11a wireless LAN standard over frequency-selective, slowly fading Nakagami channels in a pulsed jamming environment
(Monterey California. Naval Postgraduate School, 2002-12)
Wireless local area networks (WLAN) are increasingly important in meeting the needs of the next generation broadband wireless communication systems for both commercial and military applications. In 1999, the Institute of ...
Narrowband filtering effects on frequency-hopped signals
(Monterey, Calif. Naval Postgraduate School, 2002-12)
A low complexity solution to remove follower, narrowband tone jamming signals which are randomly dispersed within the bandwidth of a hop without causing non-linear phase distortions in a frequency-hopping (FH) system is ...
Coding-spreading tradeoff in CDMA systems
(Monterey, California. Naval Postgraduate School, 2002-09)
In this thesis we investigate the use of low rate codes primarily to provide the total bandwidth expansion required for a CDMA system. Comparing different combinations of coding and spreading with a traditional DS-CDMA, ...
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