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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.
11

FQPSK Doubles Spectral Efficiency of Telemetry: Advances and Initial Air to Ground Flight Tests

Feher, Kamilo 10 1900 (has links)
International Telemetering Conference Proceedings / October 26-29, 1998 / Town & Country Resort Hotel and Convention Center, San Diego, California / FQPSK is the abbreviation for Feher Quadrature Phase Shift Keying (FQPSK) patented systems [1]. Digcom, Inc. licensed FQPSK products demonstrated significant spectral saving and RF power efficient robust BER performance advantages. These bit rate agile modems and Non Linearly Amplified (NLA) transceivers, DSP and hardware implementations, and in some instances “software-radios” (20kb/s to more than 100Mb/s) and RF frequency agile (from 150MHz to more than 40GHz) developments and systems have recently been demonstrated and deployed. The spectral efficiency, i.e., data throughput capability of the 1st generation of FQPSK, as demonstrated in initial Advanced Range Telemetry (ARTM) flight tests, approximately doubles while 2nd generation “FQPSK-2” systems have the potential to quadruple the spectral efficiency of operational PCM/FM telemetry systems and be backward compatible with the 1st generation of FQPSK technologies. It is also demonstrated that the spectral efficiency advantage of FQPSK over that of NLA power efficient GMSK, OQPSK and QPSK modulated transceivers is in the 50% to 300% range and that the potential spectral efficiency advantage of FQPSK-2 over GMSK [1] is in the 200% to 500% range. Based on extensive multi-year studies of alternative solutions for spectral and RF power efficient, robust BER performance systems, several commercial US and international organizations, AIAA, CCSDS, NASA, ESA, CCSDS and various programs of the US Department of Defense (DoD) concluded that FQPSK offers the most spectrally efficient high performance-high speed proven technology solutions and recommended FQPSK standardization for several data links. Initial DoD-ARTM Program Office Air-to-Ground L-band and S-band jet airborne telemetry Test and Evaluation (T&E) data, obtained during the summer of 1998 are briefly highlighted. These include simultaneosly tested FQPSK and PCM/FM. In these tests the following ARTM objectives have been demonstrated: (a) FQPSK approximately doubles the spectral efficiency of currently operational PCM/FM; (b) The Data Link Performance of these two systems is comparable. The American Institute of Aeronautics and Astronautics (AIAA) draft modulation standard recommended to the DoD, NASA and CCSDS, was approved by the AIAA [23]. The AIAA standard recommends “that FQPSK modulation be immediately adopted as the interim increment–1 standard.”
12

ADVANCED RANGE TELEMETRY (ARTM) TIER I COMPATIBLE DEMODULATOR TESTING AND RESULTS

Temple, Kip 10 1900 (has links)
International Telemetering Conference Proceedings / October 21, 2002 / Town & Country Hotel and Conference Center, San Diego, California / The Nova HYPERMOD demodulator operates in three modes, the classic pulse-code modulation/frequency modulation (PCM/FM), sometimes known as continuous phase frequency shift keying (CPFSK) mode, shaped offset quadrature phase shift keying (SOQPSK) mode, and continuous phase modulation (CPM) mode. Of interest to this paper is SOQPSK mode which is a waveform similar to the Advanced Range Telemetry (ARTM) Tier I waveform, Feher’s Quadrature Phase Shift Keying, B version (FQPSK-B) revision (Rev) A1. Also considered is another variant, FQPSK-JR. This paper will outline the cross compatibility and resynchronization speed of these waveforms based upon ARTM-adopted demodulator performance tests. The results of these laboratory tests comparing the HYPERMOD demodulator, the enhanced Tier I demodulator, and the current Tier I reference demodulator, both from RF Networks, will be presented.
13

As patentes no Sistema Agroindustrial Brasileiro e os produtos Brasileiros patenteados por estrangeiros. / Patents in the Brazilian Agroindustrial System and Brazilian products patented by foreigners.

VASGAS, Xangai Gustavo. 25 May 2018 (has links)
Submitted by Johnny Rodrigues (johnnyrodrigues@ufcg.edu.br) on 2018-05-25T19:24:37Z No. of bitstreams: 1 XANGAI GUSTAVO VARGAS - DISSERTAÇÃO PPGSA PROFISSIONAL 2017..pdf: 676716 bytes, checksum: 48cfadb315e5a3c32d03d47d75c48022 (MD5) / Made available in DSpace on 2018-05-25T19:24:37Z (GMT). No. of bitstreams: 1 XANGAI GUSTAVO VARGAS - DISSERTAÇÃO PPGSA PROFISSIONAL 2017..pdf: 676716 bytes, checksum: 48cfadb315e5a3c32d03d47d75c48022 (MD5) Previous issue date: 2017 / Sabe-se que a Amazônia é um berço natural da fauna e flora mundial. Desta forma desperta interesses e cobiças dos mais variados povos estrangeiros. Nas últimas décadas tem-se notado o número crescente de produtos naturais amazônicos patenteados por empresas e nações estrangeiras como se fossem produtos originários daquele lugar. Desta forma, o objetivo do trabalho é realizar estudo sobre patentes de produtos amazônicos e seus aspectos jurídicos, dado ao quadro crescente de biopirataria que vem ocorrendo na Amazônia, o grande aumento de contrabando de plantas, derrubada de árvores nativas e até mesmo apropriação indevida de produtos originários nesta parte do planeta. Várias ONGs, associações, entidades e pessoas camuflam-se para buscar aqui o que é riqueza do povo amazonense. E assim, é necessário que o governo aumente a fiscalização fronteiriça, estreite os paralelos judiciais e medidas contra tal situação. Dentro do contexto, serão tratados assuntos pertinentes ao tema do trabalho, com isso espera-se que a pesquisa satisfaça pelo menos em parte, acentue e instigue a necessidade e tomada de providências. / It is known that the Amazon is a natural cradle of flora and fauna worldwide. Thus awakens desires and interests of various foreign peoples. In recent decades it has been noticed the increasing number of natural products Amazon patented by corporations and foreign nations like products originating from that place. Thus, the objective is to conduct study on patents for Amazon products and their legal, given the growing cadre of biopiracy that has been occurring in the Amazon, the great increase in smuggling of plants, felling of native trees and even misappropriation of products originating in this part of the planet. Several NGOs, associations, organizations and persons camouflage themselves to look here what is the people's wealth Amazon. And so, it is necessary that the government, increase thereby border surveillance, narrow the parallels and judicial measures against such great absurdity. Within the context will be treated matters pertaining to the subject of study, it is expected that satisfies not in all, but at least partially, thereby sharpen and instigates the need and outlet arrangements.
14

The replacement of the doctrine of pith and marrow by the catnic test in English Patent Law : a historical evaluation

Zondo, Raymond Mnyamezeli Mlungisi 02 1900 (has links)
This dissertation is a historical evaluation of the movement of the English courts from the doctrine of pith and marrow to the Catnic test in the determination of non-textual infringement of patents. It considers how and why the doctrine was replaced with the Catnic test. It concludes that this movement occurred as a result of the adoption by a group of judges of literalism in the construction of patents while another group dissented and maintained the correct application of the doctrine. Although the Court of Appeal and the House of Lords initially approved the literalist approach, they, after realising its untennability, adopted the dissenters’ approach, but, ultimately, adopted the Catnic test in which features of the dissenters’ approach were included. The dissertation concludes that the doctrine of pith and marrow, correctly applied, should have been retained as the Catnic test creates uncertainty and confusion. / Mercantile Law / LL.M.
15

The replacement of the doctrine of pith and marrow by the catnic test in English Patent Law : a historical evaluation

Zondo, Raymond Mnyamezeli Mlungisi 02 1900 (has links)
This dissertation is a historical evaluation of the movement of the English courts from the doctrine of pith and marrow to the Catnic test in the determination of non-textual infringement of patents. It considers how and why the doctrine was replaced with the Catnic test. It concludes that this movement occurred as a result of the adoption by a group of judges of literalism in the construction of patents while another group dissented and maintained the correct application of the doctrine. Although the Court of Appeal and the House of Lords initially approved the literalist approach, they, after realising its untennability, adopted the dissenters’ approach, but, ultimately, adopted the Catnic test in which features of the dissenters’ approach were included. The dissertation concludes that the doctrine of pith and marrow, correctly applied, should have been retained as the Catnic test creates uncertainty and confusion. / Mercantile Law / LL. M.
16

DIGITAL RECEIVER PERFORMANCE

Troublefield, Robert C. 10 1900 (has links)
International Telemetering Conference Proceedings / October 23-26, 2000 / Town & Country Hotel and Conference Center, San Diego, California / Bit errors often occur in a wireless communications link when impairments alter the transmitted signal. It is advantageous to be able to predict how well a system will tolerate transmission problems. This paper details laboratory performance measurements and comparisons in terms of evaluating configurations of a digital receiver for Feher patented Quadrature Phase Shift Keying (FQPSK-B) demodulation. The transmitted signal is subjected to calibrated levels of impairments while the receiver performance is monitored in real-time.

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