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Дисертації з теми "Multi-radio"

Автор: Grafiati
Опубліковано: 4 червня 2021
Оновлено: 25 липня 2025

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1

Lim, Christopher. "Optimizing access radio in multi-radio mesh network /." View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?CSED%202009%20LIM.

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2

Valenta, Václav. "Frequency synthesis for cognitive multi-radio." Phd thesis, Université Paris-Est, 2010. http://tel.archives-ouvertes.fr/tel-00597461.

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Анотація:
This doctoral thesis deals with design aspects of a reconfigurable frequency synthesizer for flexible radio transceivers in future cognitive multi-radios. The frequency bandwidth to be covered by this multi-radio synthesizer corresponds to the frequency bands of the most diffused wireless communication standards in the frequency band 800 MHz to 6 GHz. Since multi-standard operation is required, the synthesizer must fulfil the most stringent and sometimes conflicting requirements. Given these requirements, a novel approach for multi-mode frequency synthesis has been conceived. A hybrid phase lo
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3

Panahandeh, Ali. "Multi-polarized sensing for cognitive radio." Doctoral thesis, Universite Libre de Bruxelles, 2012. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209586.

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Анотація:
In this thesis the multi-polarized Cognitive Radios are studied. Cognitive Radios are proposed as an interesting way to more efficiently use the frequency resources. A Cognitive Radio secondary user finds the frequency bands which are not utilized by primary users and communicates on them without interfering with the primary users. In order to achieve this goal the secondary user must be able to detect reliably and quickly the presence of a primary user in a frequency band. In this thesis, the impact of polarization on the spectrum sensing performances of cognitive radio systems is studied.<p>
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4

Piao, Guihua. "Radio resource management for integrated services in multi-radio access networks." Kassel Kassel Univ. Press, 2006. http://www.uni-kassel.de/hrz/db4/extern/dbupress/publik/abstract.php?978-3-89958-269-7.

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5

Piao, Guihua. "Radio resource management for integrated services in multi-radio access networks." Kassel Kassel Univ. Press, 2007. http://d-nb.info/986595012/34.

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6

Kim, Hyung Joon. "Multi-standard radio transceiver architectures and radio frequency front-end design." Connect to this title online, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1110399471.

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Thesis (Ph. D.)--Ohio State University, 2005.<br>Title from first page of PDF file. Document formatted into pages; contains xv, 128 p.; also includes graphics (some col.). Includes bibliographical references (p. 125-128). Available online via OhioLINK's ETD Center
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7

Naveed, Anjum Computer Science &amp Engineering Faculty of Engineering UNSW. "Channel assignment in multi-radio multi-channel wireless mesh networks." Awarded by:University of New South Wales. Computer Science & Engineering, 2008. http://handle.unsw.edu.au/1959.4/41500.

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Анотація:
Channel assignment in wireless mesh network (WMN) aims at improving the network throughput by utilizing multiple orthogonal frequency channels to minimize the interference. Interference can be categorized as coordinated and non-coordinated, depending upon the relative location of the interfering links. Compared to coordinated interference, non-coordinated interference has a severe adverse impact on throughput. This thesis is based on the hypothesis that the network throughput can be improved significantly, if channel assignment minimizes non-coordinated interference with priority. We propose a
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8

Valois, Fabrice. "Auto-organisation de réseaux radio multi-saut." Habilitation à diriger des recherches, Université Claude Bernard - Lyon I, 2007. http://tel.archives-ouvertes.fr/tel-00272361.

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Анотація:
L'auto-organisation de réseaux radio multi-sauts a pour objectif de structurer/organiser un réseau à l'aide d'une structure logique. Pourquoi le structurer ? Pour introduire de la stabilité en ne tenant pas compte de voisins instables ou fortement mobiles, pour fédérer l'ensemble des noeuds, pour introduire une hiérarchie dans le réseau afin de faciliter le passage à l'échelle, pour introduire plus de capacité dans le réseau, etc. L'auto-organisation telle que nous la considérons vise à construire une topologie logique basée sur la topologie physique de telle sorte que les protocoles réseaux (
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9

Alexander, Paul. "Multi-frequency studies of powerful radio sources." Thesis, University of Cambridge, 1986. https://www.repository.cam.ac.uk/handle/1810/265339.

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Анотація:
This thesis is concerned with the physics of extragalactic radio - sources. Radio observations of a given source provide a powerful method with which to make direct measurements of the physical processes occuring within the la~ge-scale radio lobes and hotspots . Multi-frequency observations with up to five frequencies have been made for a number of ~ources using the Cambridge 5-km telescope and the Very Large Array. These data have been used to determine the change in radio spectra across the source . to obtain information about the way in which the electron population has evolved. Combining t
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10

Lee, Chungki. "Communication protocols in multi-hop radio networks." Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/8199.

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11

Amiri, Nehzad Maryam. "Channel assignment protocols for multi-radio multi-channel wireless mesh netwworks." Doctoral thesis, Universitat Politècnica de Catalunya, 2013. http://hdl.handle.net/10803/104156.

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Анотація:
The increasing demand for large and low cost wireless coverage, ranging from campus to city wide areas, has motivated a high interest in multi-hop communications with Wireless Mesh Networks (WMN) based on IEEE 802.11s as the most recent and significant standard. Channel Assignment (CA) is mechanism which selects the best channels for an individual wireless node or the entire network aiming to increase the capacity of the network. Channel assignment has been extensively researched for multi-radio WMNs, but it is still very challenging when it comes to its implementation. Although IEEE 80
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12

Thomas, Willie L. II, Samuel Berhanu, and Nathan Richardson. "System Framework for a Multi-Band, Multi-Mode Software Defined Radio." International Foundation for Telemetering, 2014. http://hdl.handle.net/10150/577442.

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ITC/USA 2014 Conference Proceedings / The Fiftieth Annual International Telemetering Conference and Technical Exhibition / October 20-23, 2014 / Town and Country Resort & Convention Center, San Diego, CA<br>This paper describes a system framework for a multi-band, multi-mode software defined radio (MBMM SDR) being developed for next-generation telemetry applications. The system framework consists of the multi-band front-end (MBFE), the multi-mode digital radio (MMDR), and the configuration and control (C2) sub-systems. The MBFE consists of an L/S/C-band transceiver architecture that provides w
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13

Habib, Usman. "Millimetre-wave radio-over-fibre supported multi-antenna and multi-user transmission." Thesis, University of Kent, 2018. https://kar.kent.ac.uk/71556/.

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In this thesis, various features of the RoF supported mmW communication for future wireless systems have been analysed including photonic generation of mmW for MIMO operation, performance analysis of mmW MIMO to achieve spatial diversity and spatial multiplexing with analog RoF fronthaul, and multi-user transmission in the 60 GHz-band using multiplexing-over-fibre transport and frequency-selective antenna. A low cost mmW generation system for two independent MIMO signals has been presented, consisting of a single optical Phase Modulator (PM). The different aspects of experimental analysis on R
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14

Luo, Jijun. "Joint radio resource management for multi-link terminals /." Aachen : Mainz, 2006. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=016146959&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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15

Girnyk, Maksym. "Cooperative communication for multi-user cognitive radio networks." Licentiate thesis, KTH, Kommunikationsteori, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-96794.

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Анотація:
In recent years, the main trend in wireless communications has been shifted from voice transmission to data-centric communication. This shift has caused an increase in the data rate requirements for future wireless communication systems. These requirements result in need for large bandwidth. Being a limited and thus expensive resource, wireless spectrum needs to be used efficiently. For higher spectral efficiency, new transmission techniques as well as new dynamic spectrum-allocationpolicies are needed. Cognitive radio is a promising approach for increasing spectral efficiency of wireless syst
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16

Xin, Qin. "Time efficient communication in multi-hop radio networks." Thesis, University of Liverpool, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.408569.

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17

Mortada, Mohamad Rida. "Multi-hop routing for cognitive radio sensor network." Thesis, Brest, École nationale supérieure de techniques avancées Bretagne, 2021. http://www.theses.fr/2021ENTA0010.

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Анотація:
Le réseau de capteurs sans fil (WSN) se compose d'un grand nombre de minuscules dispositifs appelés nœuds, et ces nœuds sont généralement limités en puissance et ils sont déployés de manière aléatoire dans une zone géographique à des fins de surveillance. En raison du grand nombre de nœuds dans le WSN, leur demande en ressources de fréquence devient un véritable défi en raison de la rareté du spectre. La radio cognitive (CR) a été introduite pour améliorer l'efficacité spectrale. La CR classe les utilisateurs entre l'utilisateur principal (PU) qui détient une licence sur une bande passante du
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18

Keskin, Faruk. "Precoding for MIMO multi-user mobile radio downlinks." [Kaiserslautern] : [Universitätsbibliothek], 2007. http://d-nb.info/989961354/34.

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19

Batista, Rodrigo Lopes. "Radio resource allocation for coordinated multi-point systems." reponame:Repositório Institucional da UFC, 2011. http://www.repositorio.ufc.br/handle/riufc/10836.

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Анотація:
BATISTA. R. L. Radio resource allocation for coordinated multi-point systems. 2011 74 f. Dissertação (Mestrado em Engenharia de Teleinformática) - Centro de Tecnologia, Universidade Federal do Ceará, Fortaleza, 2011.<br>Submitted by Marlene Sousa (mmarlene@ufc.br) on 2015-02-27T19:26:14Z No. of bitstreams: 1 2011_dis_rlbatista.pdf: 1984568 bytes, checksum: fb73d12e218f0bf5048212826227d5bc (MD5)<br>Approved for entry into archive by Marlene Sousa(mmarlene@ufc.br) on 2015-03-04T15:49:40Z (GMT) No. of bitstreams: 1 2011_dis_rlbatista.pdf: 1984568 bytes, checksum: fb73d12e218f0bf5048212826227d5bc
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20

Zandegran, Antony Jeyasehar Ansel. "Multi-operator, Multi-Radio Performance Monitoring and Context-Aware access Provision Test-bed." Thesis, KTH, Kommunikationssystem, CoS, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-141707.

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21

Piao, Guihua [Verfasser]. "Radio resource management for integrated services in multi-radio access networks / Universität Kassel. Guihua Piao." Kassel : Kassel Univ. Press, 2007. http://d-nb.info/986595012/34.

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22

Papadopoulos, Dimitrios Filippos. "A power efficient linear multi-mode CMOS radio transmitter /." Zürich : ETH, 2008. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=18122.

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23

Abaii, Mohammad. "Multi-cell radio resource management for future cellular systems." Thesis, University of Surrey, 2009. http://epubs.surrey.ac.uk/843425/.

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Future mobile communications systems will be designed to support a wide range of data rates with complex and conflicting quality of service requirements. It is becoming more challenging to optimize radio resource management and maximise the system capacity whilst meeting the required quality of service from users' point of view. Traditional techniques have approached this problem by mainly focusing on resources within a cell and to large extent ignoring effects of multi-cell architecture leading to non uniform and unstable capacity across the network. This thesis first investigates the potenti
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24

Fortune, P. M. "Multi-level modulation schemes for digital cellular mobile radio." Thesis, University of Southampton, 1988. https://eprints.soton.ac.uk/421471/.

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25

Sakki, Kranthi Kumar. "A Radio Frequency Identification Multi-Sensor Health Monitoring System." Thesis, California State University, Long Beach, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10262351.

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<p> Health Monitoring Systems (HMS) are used to monitor physiological signals such as the blood pressure, heart rate, and temperature of patients. The use of a HMS for continuous monitoring of the Vital Signs of patients requiring constant medical supervision, is particularly important. The current project presents the development and implementation of a multi-sensor HMS to track and record multiple parameters of a patient (Electrocardiogram, pulse, temperature, and body position). The project development uses biomedical sensor technology for monitoring the physiological signals, Radio Frequen
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26

Suárez, Peñaloza Martha. "Architectures d'émetteurs pour des systèmes de communication multi-radio." Thesis, Paris Est, 2009. http://www.theses.fr/2009PEST1050.

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Анотація:
Cette thèse porte sur les architectures d’émission pour des terminaux mobiles multi-radio fonctionnant dans la bande de fréquences, 800 MHz - 6 GHz. Avec l’évolution constante des systèmes de communication, les terminaux doivent fonctionner dans plusieurs bandes de fréquences et modes, correspondant à une grande diversité de normes. Le concept d’une architecture multi-radio unique est une évolution de celui de l’émetteur-récepteur multistandard, caractérisé par une mise en parallèle des circuits pour chaque standard. Il permet alors d’optimiser coût et consommation. L’objet de l’étude est de c
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27

Teeraparpwong, Pongsakorn. "Operator and radio resource sharing in multi-carrier environments." Diss., [La Jolla] : University of California, San Diego, 2009. http://wwwlib.umi.com/cr/ucsd/fullcit?p1469262.

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Анотація:
Thesis (M.S.)--University of California, San Diego, 2009.<br>Title from first page of PDF file (viewed October 20, 2009). Available via ProQuest Digital Dissertations. Includes bibliographical references (p. 54-56).
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28

Wu, Di. "Scalable multi-standard radio baseband for modern wireless communications /." Linköping : Department of of Electrical Engineering, Linköping University, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-18208.

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29

Kumar, Sumit. "Architecture for simultaneous multi-standard software defined radio receiver." Electronic Thesis or Diss., Sorbonne université, 2019. http://www.theses.fr/2019SORUS160.

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Анотація:
Motivés par les capacités du SDR, nous théorisons dans ce travail un récepteur de définition radio multi-standard simultané (SMS-SDR). Un récepteur SMS-SDR sera capable de décoder "simultanément" les informations de plusieurs standards sans fil hétérogènes utilisant le même frontal RF. Nos réseaux cibles sont des réseaux à accès aléatoire fonctionnant dans des bandes sans licence. Ces normes fonctionnent sans coordination centralisée et sont soumises à de graves brouillage entre canaux du même type de technologie (CT-CCI) car leurs bandes de fréquences de fonctionnement se chevauchent. Nous dé
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30

Choi, Sangil. "Minimum interference channel assignment for multicast in multi-channel multi-radio wireless mesh networks." [Ames, Iowa : Iowa State University], 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1468073.

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31

Variano, Fabrizio. "Progettazione e valutazione di un protocollo MAC multi-radio multi-canale per reti wireless." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2011. http://amslaurea.unibo.it/2726/.

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32

Shen, Tianning. "EXPERIMENTAL STUDY OF MULTIRATE MARGIN IN SOFTWARE DEFINED MULTIRATE RADIO." Cleveland State University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=csu1263695252.

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33

Bales, Jason M. "Multi-channel hardware/software codesign on a software radio platform." Fairfax, VA : George Mason University, 2008. http://hdl.handle.net/1920/3400.

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Анотація:
Thesis (M.S.)--George Mason University, 2008.<br>Vita: p. 89. Thesis director: David D. Hwang. Submitted in partial fulfillment of the requirements for the degree of Master of Science in Electrical Engineering. Title from PDF t.p. (viewed Mar. 9, 2009). Includes bibliographical references (p. 85-88). Also issued in print.
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34

Lau, Chiew Tong. "Multi-antenna and receiver slotted ALOHA packet radio systems with capture." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/30727.

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Анотація:
The problem of data transmission in a packet radio system with one central base station and a number of mobile/stationary terminals is addressed. More specifically, the effects of possible collisions between packets on the inbound channel are investigated. Schemes which can be used to improve the performance are studied. The use of capture to improve the performance of slotted ALOHA systems is discussed. For a power group division scheme proposed by Metzner in which a capture effect is artificially induced, it is shown that in the two power group case, the higher power packet needs only be a
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35

Furuskär, Anders. "Radio resource sharing and bearer service allocation for multi-bearer service, multi-access wireless networks." Doctoral thesis, KTH, Signals, Sensors and Systems, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3502.

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<p>Two expected characteristics of future wireless networks aresupport for multiple bearer services, which in turn enablemultiple end-user services, and the parallel use of multipleradio access technologies. This dissertation discusses radioresource management principles to improve capacity for suchmulti-bearer service, multi-access networks.</p><p>More specifically, it is first focused on how to mostefficiently share the radio resource between bearer servicegroups within one access technology. A general principle forsharing resources in interference limited systems is proposed,and its expecte
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36

Vollenbruch, Ulrich. "Design of reconfigurable digital phase locked loops for multi-standard, multi-band mobile radio terminals." München Verl. Dr. Hut, 2008. http://d-nb.info/992163412/04.

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37

Skalli, Habiba. "Channel assignment, routing and cross layer issues for multi-radio multi-channel wireless mesh netorks." Thesis, IMT Alti Studi Lucca, 2009. http://e-theses.imtlucca.it/16/1/Skalli_phdtheis.pdf.

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Анотація:
Next generation wireless mobile communications will be driven by converged networks that integrate disparate technologies and services. The Wireless Mesh Network (WMN) is envisaged to be one of the key components in the converged networks of the future, providing flexible, high-bandwidth wireless backhaul over large geographical areas. While single radio mesh nodes, operating on a single channel suffer from capacity constraints, equipping mesh routers with multiple radios using multiple non-overlapping channels can significantly alleviate the capacity problem and increase the aggregate bandwi
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38

Kim, Hyungwook. "CMOS radio-frequency power amplifiers for multi-standard wireless communications." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/44786.

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Анотація:
The development of multi-standard wireless communication systems with low cost and high integration is continuously requested and accompanied by the explosive growth of the wireless communication market. Although CMOS technology can provide most building blocks in RF transceivers, the implementation of CMOS RF power amplifiers is still a challenging task. The objective of this research is to develop design techniques to implement fully-integrated multi-mode power amplifiers using CMOS technology. In this dissertation, a load modulation technique with tunable matching networks and a pre-distor
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39

Kondareddy, Yogesh Reddy Agrawal Prathima. "MAC and routing protocols for multi-hop cognitive radio networks." Auburn, Ala, 2008. http://repo.lib.auburn.edu/EtdRoot/2008/SUMMER/Electrical_and_Computer_Engineering/Thesis/Kondareddy_Yogesh_18.pdf.

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40

Koudouridis, Georgios. "Study of Multi-Radio Transmission Diversity in Heterogeneous Access Networks." Licentiate thesis, KTH, Kommunikationsnät, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-122723.

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Анотація:
With the advent of multi-radio access (MRA), an integration of differentradio access technologies (RATs) into a heterogeneous radio access network(RAN) becomes feasible. Such integration allows a user to be at any instantof time served by one or multiple radio accesses (RAs) concurrently, where anRA constitutes an independent radio resource, such as a carrier or a channel,implemented by a single RAT. It also allows a user´s service demands to bemapped onto the aggregated network resources in a transparent and efficientway. An approach for the realization of such multi-radio integrated environm
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41

Keskin, Faruk [Verfasser]. "Precoding for MIMO multi-user mobile radio downlinks / Faruk Keskin." [Kaiserslautern] : [Universitätsbibliothek], 2007. http://d-nb.info/989961354/34.

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42

Mannering, Elizabeth J. A. "A multi-wavelength study of radio-loud active galactic nuclei." Thesis, University of Bristol, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.619451.

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Анотація:
In part I. I construct a sample of radio-loud active galactic nuclei (AGN) host galaxies from the optical Sloan Digital Sky Survey (SDSS) and Faint Images of the Radio Sky at Twenty cm (FIRST). These have 1.4GHz luminosities in the range 1023 - 1025 WHZ-l, span redshifts 0.02 < z < 0.18, are brighter than rpetro < 17.77 mag and are constrained to 'early-type' morphology in colour space (u• - r• > 2.22 mag). Optical emission-line ratios (at > 311) are used to remove type 1 AGN and star-forming galaxies from the radio sample using BPT diagnostics. For comparison, a sample of radio-quiet galaxies
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43

Roman, Mircea Cristian. "Heterogeneous parallel multi-radio transmission system in wireless vehicular communication." Thesis, Oxford Brookes University, 2016. https://radar.brookes.ac.uk/radar/items/cd528ff7-5eea-4b5c-992a-ef5c923c155b/1/.

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In the context of growing demand for mobile data and the emergence of ve­ hicular applications, heterogeneous networks will become a necessity to meet the various requirements of future Intelligent Transport Systems. The aim of this research work is to investigate the use of heterogeneous vehicular wireless net­ works with multiple independent Radio Access Technologies (RATs). A Multiple Interface Scheduling System (MISS) is proposed, based on a user perspective, where the vehicle has visibility of all the available RATs, with no modification to the fixed infrastructure, operator independent,
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44

Abdelnasser, Amr Adel Nasr. "Radio resource management techniques for multi-tier cellular wireless networks." IEEE Transactions on Mobile Computing, 2013. http://hdl.handle.net/1993/30993.

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There is a prolific increase in the penetration of user devices such as smartphones and tablets. In addition, user expectations for higher Quality of Service (QoS), enhanced data rates and lower latencies are relentless. In this context, network densification through the dense deployment of small cell networks, underlaying the currently existing macrocell networks, is the most appealing approach to handle the aforementioned requirements. Small cell networks are capable of reusing the spectrum locally and providing most of the capacity while macrocell networks provide a blanket coverage for mob
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45

Kozal, Ahmed Sultan Bilal. "Multi user cooperation spectrum sensing in wireless cognitive radio networks." Thesis, Liverpool John Moores University, 2015. http://researchonline.ljmu.ac.uk/4474/.

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With the rapid proliferation of new wireless communication devices and services, the demand for the radio spectrum is increasing at a rapid rate, which leads to making the spectrum more and more crowded. The limited available spectrum and the inefficiency in the spectrum usage have led to the emergence of cognitive radio (CR) and dynamic spectrum access (DSA) technologies, which enable future wireless communication systems to exploit the empty spectrum in an opportunistic manner. To do so, future wireless devices should be aware of their surrounding radio environment in order to adapt their op
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46

Maheshwarappa, Mamatha R. "Software defined radio (SDR) architecture for concurrent multi-satellite communications." Thesis, University of Surrey, 2017. http://epubs.surrey.ac.uk/813388/.

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SDRs have emerged as a viable approach for space communications over the last decade by delivering low-cost hardware and flexible software solutions. The flexibility introduced by the SDR concept not only allows the realisation of concurrent multiple standards on one platform, but also promises to ease the implementation of one communication standard on differing SDR platforms by signal porting. This technology would facilitate implementing reconfigurable nodes for parallel satellite reception in Mobile/Deployable Ground Segments and Distributed Satellite Systems (DSS) for amateur radio/univer
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47

Yang, Xi. "Filter-less Architecture for Multi-Carrier Software Defined Radio Transmitters." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1321403816.

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48

Ertas, Tuncay. "Trellis coded multi-h CPM for digital mobile radio systems." Thesis, University of Sussex, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358879.

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49

Dewani, Aliya Ashraf. "Flexible Multi-Layer Frequency Selective Surfaces for Radio Secure Environments." Thesis, Griffith University, 2016. http://hdl.handle.net/10072/367902.

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In buildings with multiple occupancy, frequency shielding and re-use methods are required to enhance the spectral efficiency. Passive band stop Frequency Selective Surfaces (FSSs) can be used to improve the electromagnetic architecture of the buildings. This dissertation provides a new approach to the design of spatial filter material (frequency selective surfaces) on a flexible, thin and transparent substrate. The flexibility, transparency and frequency shielding property of these film type structures help them to be deployed on the walls/windows of offices, vehicles, and prisons etc. This te
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50

Toomey, James IV. "The galactic center radio arc : a multi-frequency polarimetric study." Thesis, University of Iowa, 2014. https://ir.uiowa.edu/etd/4774.

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Despite the Radio Arc non-thermal filaments (NTFs) being discovered 30 years ago, their origin remain poorly understood. The Radio Arc NTFs have an unusually flat spectrum in the centimeter to millimeter spectrum with a predicted, though poorly constrained, turn-over between 30-200 GHz. With the recently upgraded wide-band capabilities of the VLA, we conducted a multi-frequency polarimetric study of the Radio Arc region. With observations at a set of low radio frequencies (continuous coverage over 2-6 GHz & 10-12 GHz), we imaged both the total and polarized intensity distributions at high angu
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