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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
31

Extraction of wind speed from high frequency ground wave radar oceanic backscatter /

Green, David W., January 2005 (has links)
Thesis (M.Eng.)--Memorial University of Newfoundland, 2005. / Bibliography: leaves 71-76.
32

Doppler processing of phase encoded underwater acoustic signals

Eldred, Randy Michael. January 1990 (has links) (PDF)
Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, September 1990. / Thesis Advisor(s): Miller, James H. Second Reader: Tummala, Murali. "September 1990." Description based on title screen as viewed on December 17, 2009. DTIC Identifier(s): Acoustic tomography, inverse problems, Fast Hadamard Transforms, theses. Author(s) subject terms: Acoustic tomography, Fast Hadamard Transform, maximal-length sequences, Doppler processing. Includes bibliographical references (p. 95-96). Also available in print.
33

Radar studies of atmospheric gravity waves / by I.M. Reid

Reid, Iain Murray January 1984 (has links)
Includes reprint of author's article, `HF Doppler measurements of mesospheric gravity wave momentum fluxes`, from Journal of the atmospheric sciences, vol. 40, no. 5, May 1983 / Bibliography: Last 6 unnumbered leaves / 300, [225] leaves : ill ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, Dept. of Physics, 1984
34

VHF radar studies of the troposphere /

May, Peter T. January 1986 (has links) (PDF)
Thesis (Ph. D.)--University of Adelaide, 1986. / Includes bibliographical references (leaves 163-172).
35

Detection of growlers in sea clutter using an X-band pulse-Doppler radar.

Nohara, Timothy Joseph. Haykin, S. Unknown Date (has links)
Thesis (Ph.D.)--McMaster University (Canada), 1991. / Source: Dissertation Abstracts International, Volume: 53-01, Section: B, page: 0496. Supervisor: Simon Haykin.
36

An algorithm for the extraction of ocean wave parameters from wide beam HF radar (CODAR) backscatter /

Gill, Eric William. January 1990 (has links)
Thesis (M.Eng.) -- Memorial University of Newfoundland. / Typescript. Bibliography: leaves 73-76. Also available online.
37

Design specifications of an incoherent pulsed doppler sonar instrument for monitoring hydrothermal vent characteristics

Comeau, William Joseph. January 1990 (has links)
Thesis (M.S.)--University of California, San Diego, 1990. / Includes bibliographical references (leaves 71-72).
38

Estimation of vector surface currents beyond the region of overlap of dual-site HF radar : an implementation of the continuity equation /

Bobby, Pradeep, January 2003 (has links)
Thesis (M.Eng.)--Memorial University of Newfoundland, 2003. / Bibliography: leaves 115-120. Also available online.
39

Development of a software defined radar environment simulator

Joubert, Anton Francois 04 1900 (has links)
Thesis (MScEng)--University of Stellenbosch, 2005. / ENGLISH ABSTRACT: The development of a radar system is a complex process, requiring a substantial amount of testing. In general, these tests are performed using field trials. Such trials are expensive, and their exact conditions can never be repeated. A radar environment simulator allows for repeatable testing of the majority of a radar's functionality; however, most commercial products are not cost effective. In this thesis we investigate the various approaches to modelling targets and the littoral environment, and then develop a low-cost, largely software defined simulator. This simulator is capable of generating real-time video signals for a monopulse doppler tracking radar. The core simulation routines reside in an extensible software framework which is populated with simple target and clutter models for a prototype simulator. Closed loop tracking tests verify the operation of the prototype simulator. / AFRIKAANSE OPSOMMING: Die ontwikkeling van 'n radarstelsel is a ingewikkelde proses wat verskeie stelseltoetse benodig. Veldtoetse, wat gewoonlik gebruik word, is 'n duur proses, en die toestande is nooit presies dieselfde nie. 'n Radar-omgewingsimulator kan 'n groot deel van 'n radar se funksionaliteit herhaaldelik toets. Daar is egter weinig koste-effektiewe kommersile produkte vir hierdie doel beskikbaar. Hierdie tesis ondersoek verskeie teiken- en omgewingsmodelle, waarna 'n lae-koste, meestal sagteware-gedefinieerde simulator ontwikkel word. Hierdie simulator genereer intydse videoseine vir 'n enkelpuls-dopplervolgingsradar. Die kernfunksionaliteit van die simulator is in sagteware gesetel, en basiese teiken- en omgewingsmodelle is geïmplementeer. Die prototipe-simulator word getoets deur dit aan die radar self te koppel, en dan die teiken-opsporing en -volging te verifieer.
40

Mitigating interference from switch-mode power supplies in sampling receivers

Slamdien, Muammar January 2017 (has links)
Thesis (MTech (Electrical Engineering))--Cape Peninsula University of Technology, 2017. / This thesis reports on the research and development of techniques applied to mitigate interference from switch-mode power supplies in sampling receivers and also more specifically for FMCW radar receiver applications. During the system testing phase of an FMCW Radar at Reutech Radar Systems (RRS), it was found that a large false target was emerging on the Range-Doppler Map (RDM). It was concluded that the problem was originating from interference caused by the switch-mode power supplies (SMPS), which supply DC power to the radar receiver subsystem. This then created the need for a new DC power supply, which is able to minimize the interference, as well as, mitigate the effects of the interference caused by the switching of the power supply. The mitigation techniques and power supply development was divided four main sections, namely, research, simulation, design and evaluation. The research involved obtaining background information on sampling receivers, sampling theory, Range-Doppler Processing, switch-mode power supplies, their effects and mitigation thereof. In the simulation phase, the research was utilised to simulate the various interference mitigation techniques. A power supply PCB was then designed in the design phase to practically illustrate the techniques being utilised. Lastly, during evaluation, this PCB was evaluated against the criteria set out in the research phase. The results demonstrated that the technique of synchronising the PWM clock to the Sampling frequency and SRF yielded a significant reduction in the SMPS noise on the Range-Doppler Map.

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