Дисертації з теми "Radio link design"
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Hamied, Khalid Abdul-Ariz. "Advanced radio link design and radio receiver design for mobile communications." Diss., Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/15940.
Повний текст джерелаAlam, Tasmeer. "LINK DEPENDENT ADAPTIVE RADIO – DESIGN FOR iNET." International Foundation for Telemetering, 2017. http://hdl.handle.net/10150/626995.
Повний текст джерелаVolos, Haris I. "Cognitive Radio Engine Design for Link Adaptation." Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/29148.
Повний текст джерелаPh. D.
Britto, Elizabeth, and Patricia Mwangi. "CHANNEL ISSUES FOR DESIGN OF THE iNET RADIO LINK PROTOCOL." International Foundation for Telemetering, 2005. http://hdl.handle.net/10150/604896.
Повний текст джерелаThis paper presents the issues related to the modeling and performance of the Radio Channel used in Telemetry. Because of the physical environment one expects stressed channel conditions due to multipath, shadowing, and high doppler shift caused by high speeds of up to mach 3. Prior work has created useful data and models for analysis of these radio channels. This paper will develop features of a channel simulator that will allow for evaluation of radio protocols for iNET. Substantial work has also been done to develop requirements for the iNET networked radio environment. This paper will map these requirements into technical features required for the radio link and consider how these will relate to the effects of the channels.
Wu, Yang. "Optical heterodyned radio-over-fiber link design using electroabsorption & electrooptic modulators /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2004. http://wwwlib.umi.com/cr/ucsd/fullcit?p3123659.
Повний текст джерелаHossain, Abu Zafar Mohammad Ekram. "Radio link control and transport layer protocol design issues in wireless IP networks." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0017/NQ58572.pdf.
Повний текст джерелаAden, Hassan Abdullahi, and Källqvist Rasmus Karlsson. "Evaluating LoRa Physical as a Radio Link Technology for use in a Remote-Controlled Electric Switch System for a Network Bridge Radio-Node." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-247895.
Повний текст джерелаDenna rapport utforskar designen av ett system för att fjärrstyrt slå på eller av elektronik över ett avstånd på minst 15 km, för att användas med batteridrivna radionoder för nätverksbryggning utomhus med Wi-Fi. Tillämpningsområdet för nätverksbryggorna är att koppla samman avlägsna nätverk, om Internetinfrastruktur skulle sluta fungera vid en nödsituation.Problemställningen för rapporten var ”Vad är en lämplig radiolänksteknik att använda i ett fjärrstyrt elektriskt strömbrytarsystem, och hur ska det bäst brukas?”. För att svara på frågan gjordes en avgränsning att utforska Low Power Wide Area Network (LPWAN)-länktekniker, på grund av deras tidigare användning inom effektbegränsade enheter.Long Range-radio, förkortat LoRa, är en radiomodulationsteknik som används för att skicka data över långa avstånd med energibegränsade enheter. LoRa:s räckvidd uppnås genom att drastiskt sänka datatakten, och lämpar sig för bruk i batteridrivna eller energiskördande enheter, likt de som återfinns inom fältet Internet of Things.Ett LoRa-baserat sändaroch mottagarpar implementerades, och uppmättes till att ha en paketlevereringsmängd på över 95% vid ett avstånd på 2 km, mätt mellan två broar. Data vid större avstånd kunde inte bli bestämt noggrant, eftersom LoRa transceivern gav felaktiga avläsningar. Ingen slutsats kunde göras för lämpligheten för att använda ett LoRa-baserat system för att lösa problemet, delvist för att en olämplig metod för att testa radions prestanda använts, och delvist på grund av ett ofullständigt mätresultat.
Frykskog, David, and Hjalmar Jonsson. "Construction of RF-link budget template for transceiver modelling." Thesis, Linköpings universitet, Fysik och elektroteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-162159.
Повний текст джерелаBenzerbadj, Ali. "Approche inter-couches pour l'économie d'énergie et la fiabilité dans les Réseaux de Capteurs Sans Fil dédiés aux Applications Critiques de Surveillance." Thesis, Brest, 2018. http://www.theses.fr/2018BRES0034/document.
Повний текст джерелаWireless Sensor Networks (WSNs) are a special class of Ad hoc networks, which are under intensive research.They are considered as a very powerful tool to connect the physical and the digital worlds. They consist of a largenumber of sensor nodes that are characterized with limited resources in terms of energy, range of sensing and communication, processing speed and storage capacity.They are deployed in an indoor or outdoor environment in many application domains such as army, environment, health, home and agriculture. The scarcity of sensor node resources and the unreliability of wireless links drive most of the research issues in the field of WSNs, namely energy, coverage, connectivity, routing, fault tolerance and security. The aim of this thesis is to propose an energyefficient and reliable cross-layer surveillance protocol for sensitive fenced areas, such as oil or nuclear sites, using duty-cycled WSNs with asymmetrical links due to the radio irregularity phenomenon. Initially, the proposed protocol identifies the boundary nodes of the deployedWSN, to be used as sentinel nodes, i.e., nodes that are always in an active state. The remaining nodes are usedas duty-cycled relay nodes during the routing phase to relay alerts towards the sink. The boundary nodes identification process and alert routing are both performed using an enhanced version of the Greedy Perimeter Stateless Routing (GPSR) protocol, referred to as GPSR over Symmetrical Links (GPSR-SL) and which relies on a Non Unit Disk Graph (N-UDG). The proposed cross-layer surveillance protocol has been implemented and its performance has been evaluated under the OMNeT++/Castalia simulation environment. Performance results show that this protocol achieves higher Packet Delivery Ratio by up to 3.63%, energy .efficiency and satisfactory latency when compared to the same protocol based on the original GPSR
Josefsson, Elias. "Multi-viewed Visualization of Modularity for Product Line Management : Case study at Hardware Radio Design, Ericsson AB." Thesis, KTH, Maskinkonstruktion (Inst.), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-157048.
Повний текст джерелаSyftet med denna uppsats är att undersöka hur visualisering kan hjälpa Hardware Radio Design på Ericsson AB i sitt modularitetsarbete. För att kunna tillmötesgå marknades krav på fler och fler versioner av radioenheter, har Ericsson infört en modulbaserad utveckling av sin produktfamilj. Med en modulär produktfamilj kan fler varianter utvecklas med samma mängd resurser och därmed stärka Ericssons position på marknaden. I arbetet med att fastslå moduläriteten måste olika intressenter förstå och utvärdera effekten utifrån flera aspekter. Inledningsvis intervjuades utvalda intressenter på Ericsson för att identifiera den information, relaterad till modularitet, som gagnas av visualisering där utvecklingstid, resursanvändning och tidsplanering har fokuserats. Därefter utvecklades visualiseringskoncept för valda fokusområden som utvärderades av intressenterna. Koncepten innehåller kända diagram, t.ex. organisationschema för produktstruktur, stapeldiagram för resursanvändning och GANTTschema för tidsplanering. Slutligen byggdes en web-applikation med flera interaktiva vyer och modeller för att kunna validera resultaten. Slutsatsen i projektet är att en visualisering av produktfamiljens modularitet mycket sannolikt skulle hjälpa intressenter att förstå hur ett modulärt förslag påverka olika aspekter. Genom att, utifrån samma data, generera flera vyer kan aktörer med olika intressen tillsammans diskutera och fatta bättre beslut. Resultaten visar att ett visualiseringsverktyg för modularitet med stor sannolikhet också skulle underlätta kommunikationen mellan olika delar av organisationen. Som framtida arbete bör en omfattande verifiering av visualiseringarna och verktyget göras för att säkerställa dess värde i en verklig utvecklingsprocess. Det finns även stora möjligheter att utveckla verktyget med fler typer av element, t.ex. mjukvara och testfall. Även integration med andra system kan ge ytterligare värden, t.ex. tidrapporteringssystem för att utvärdera gjorda tidsestimat med verkliga utfall.
Lazaris, Dimitrios Theodoros. "Design and evaluation of portable antennas for location of sources of radio noise emanating from power-line hardware." Thesis, Monterey, California. Naval Postgraduate School, 1992. http://hdl.handle.net/10945/23619.
Повний текст джерелаPower-line noise (PLN) is a major contributor to factors which cause the loss of signals at naval receiving sites. Navy Signal-to-Noise Enhancement Program (SNEP) teams have developed portable instrumentation for the location of RF noise-producing power-line hardware. An important component of the instrumentation is a lightweight antenna with modest directivity and wide bandwidth (60-800 MHz). The purpose of this study is the design, construction, analysis, and measurement of three customized Log-periodic Dipole Arrays (LPDA) for use in locating PLN sources. Modifications to standard LPDA designs include a feeder boom with convenient construction features and emphasis on a compact, lightweight, portable structure. The Numerical Electromagnetics Code (NEC) was used to analyze the performance of the various designs. Input impedances were measured in operational environments using network analyzers. The final designed were field-tested at a U.S. Naval site in Okinawa and found to be completely acceptable for SNEP use.
Gong, Fei. "Front End Circuit Module Designs for A Digitally Controlled Channelized SDR Receiver Architecture." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1322606039.
Повний текст джерелаAkour, Amneh M. "Design Techniques for Manufacturable 60GHz CMOS LNAs." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1306443049.
Повний текст джерелаShakoori, Moghadam Monfared Shaghayegh. "Design and prototyping of indoor positioning systems for Internet-of-Things sensor networks." Doctoral thesis, Universite Libre de Bruxelles, 2021. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/316363.
Повний текст джерелаDoctorat en Sciences de l'ingénieur et technologie
info:eu-repo/semantics/nonPublished
Huang, Wei-Chi, and 黃偉奇. "D8PSK Software Radio Design for Air-Ground Data Link." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/69248317168809304789.
Повний текст джерела國立海洋大學
電機工程學系
87
For data communications in CNS/ATM, the air-ground aeronautical telecommunication network requires irregular, high data rates of transmission in long bursts. The Aircraft Communication Addressing and Reporting System ( ACARS ) is a VHF radio currently used in air-ground Communications. Due to its low data transmission rate of 2.4 Kb/s, small communication capacity and high cost, ACARS can''t cope with the fast growing needs of high throughput in aeronautical communications. Because VHF Digital Link ( VDL ) can operate at a bit rate up to 31.5 Kb/s, and has larger capacity, it will gradually replace ACARS and become the key VHF data link system for the next generation air-ground data communications. The objective of the thesis is to develop the mode3 VDL prototype system which implements D8PSK baseband/IF band transceiver for physical layer protocols, and evaluate its performance over a Gaussian white noise channel when estimation errors of synchronization parameters including carrier frequency, phase and symbol timing exist. By the use of DSP on-line simulator ( LabVIEW ) and the associated wideband ADC/DAC module board, the VDL transceiver system is simulated, designed and tested ant its performance is assessed. The results from the thesis can facilitate the DSP chip-based design in the future for practical applications, and is anticipated to establish the key technology for the next generation air-ground communications.
Al-Tamimi, Majid. "MAC Protocol Design for Parallel Link Rendezvous in Ad Hoc Cognitive Radio Networks." Thesis, 2010. http://hdl.handle.net/10012/5006.
Повний текст джерелаHossain, Ekram. "Radio link control and transport layer protocol design issues in wireless IP networks." Thesis, 2000. https://dspace.library.uvic.ca//handle/1828/9562.
Повний текст джерелаGraduate
Salamon, Stephen John. "Modelling Terrestrial Clear-Air Microwave Radio Fading." Thesis, 2022. https://hdl.handle.net/2440/136413.
Повний текст джерелаThesis (Ph.D.) -- University of Adelaide, School of Electrical and Electronic Engineering, 2022
Ma, Hao. "Performance Analysis of Secondary Link with Cross-Layer Design and Cooperative Relay in Cognitive Radio Networks." Thesis, 2012. http://hdl.handle.net/10754/234954.
Повний текст джерелаHu, Kangmin. "Analysis and design on low-power multi-Gb/s serial links." Thesis, 2011. http://hdl.handle.net/1957/21944.
Повний текст джерелаGraduation date: 2012
Ku, Chien Chun, and 辜建竣. "Arbitrary Output Power Ratio One Section Branch Line Design." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/ympumh.
Повний текст джерела國立勤益科技大學
電子工程系
105
In this paper, an arbitrary output power ratio one section branch line coupler is proposed. Based on two symmetry planes and the circuit analysis, using Mathematica software as the formula to derive the auxiliary program, the scattering parameters of the structure are deduced. By giving some physical parameters we have deduced the equal electrical length of any output power ratio branch line coupler, fixed electrical length of any output power ratio branch line coupler, equal transmission line impedance value of any output ratio branch line coupler, and fixed transmission line impedance value of any output ratio branch line coupler. All circuits were simulated by the EM simulation softwares, the output power ratio at working frequency can be applied to any ratio of the output power of the demand, the fabricted circuits were measured by the vector network analyzer, and the simulated and measured results are in good agreement at working frequency. The circuit design can be applied to different center frequency, easy to fabricate, and has significantly cost reduction in circuit fabrication.
Lai, Xi-Song, and 賴溪松. "Tandem and route diversity system design on 20GHz band radio relay links in Taiwan." Thesis, 1986. http://ndltd.ncl.edu.tw/handle/41316677086828795565.
Повний текст джерелаHSU, SHIH-ANG, and 許世昂. "Designs of High Power Ratio Dividers Using Left-Handed Transmission Line Transformers." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/75y88e.
Повний текст джерела國立高雄大學
電機工程學系碩博士班
105
In general, high power ratio unequal Wilkinson power divider needs high characteristic impedance quarter-wavelength transformer. However, high impedance microstrip quarter-wavelength transformer is not easily implemented. Each of the proposed high power ratio unequal power dividers uses left-handed transmission line transformer which has -90° phase delay to avoid the usage of high impedance quarter-wavelength transformer. In order to achieve impedance match and isolation design, an equivalent 270° impedance transformer can be designed between isolation resistor and input port of each proposed divider. In this study, the equivalent 270° impedance transformer is realized by multi-T-shaped, multi-π-shaped, or a uniform impedance transmission line transformer.
Han, Guoxiang. "High-Performance Reconfigurable Radio-Frequency Integrated-Circuit Receiver Architectures for Concurrent Signal Reception." Thesis, 2021. https://doi.org/10.7916/d8-2d6f-tb91.
Повний текст джерелаTeng, Chi-Huan, and 鄧跡寰. "Design of the Microstrip Couplers with Arbitrary Power Ratio and Microstrip Bandpass Filter with the Stepped Coupled Line." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/65560166977257394692.
Повний текст джерела國立中正大學
電機工程研究所
101
This paper presents two designs. First, a novel design equations and examples of the modified arbitrary power ratio microstrip tandem coupler are presented. In order to obtain a wide passband, couplers with triple poles at the return loss are proposed. Compared to the conventional couplers such as Lange couplers and parallel coupled line couplers, high impedance transmission lines and narrow coupling gaps are not required for the proposed microstrip coupler. In terms of measured results, there is a wide bandwidth of more than 70%. Moreover, good agreement between theoretical predication and measurement validates our proposed structure. In the second design, a novel wide passband microstrip bandpass filter with broader stopbands is provided. The proposed bandpass filters is composed of the stepped coupled line and two short-circuited stubs. Each stage of electrical length of the stepped coupled line has been optimized and cascaded together for harmonic suppression. Moreover, the stepped coupled line with weak–strong–weak coupling results in a wide stopband. Furthermore, with short-circuited stubs connected at the input/output port, there is a steeper passband skirt and broader passband. In addition, the agreement between theoretical prediction and measurement validates our proposed structure.