Дисертації з теми "Smart Antenna System"
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Tidd, William Graves. "Sequential beamspace smart antenna system." Thesis, Montana State University, 2011. http://etd.lib.montana.edu/etd/2011/tidd/TiddW0511.pdf.
Повний текст джерелаTung, Edwin Tai-Wing. "A multiport antenna for an indoor PCS smart antenna system." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ38646.pdf.
Повний текст джерелаLee, Gil Young. "Conformal Body-Worn Smart Antenna System for Wideband UHF Operation." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1323756546.
Повний текст джерелаJanapsatya, Januar. "Switched-beam smart antenna system for indoor wireless LAN /." [St. Lucia, Qld.], 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18419.pdf.
Повний текст джерелаChakravorti, Mark F. J. "CMOS analog signal processing for a smart antenna system." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0018/MQ49671.pdf.
Повний текст джерелаRoh, Mark C. (Mark Charles) 1975. "A base station smart antenna system for CDMA cellular." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/47613.
Повний текст джерелаNg, Kok Keng. "Smart antenna application in DS-CDMA mobile communication system." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2002. http://library.nps.navy.mil/uhtbin/hyperion-image/02sep%5FNg.pdf.
Повний текст джерелаSchacht, Mirko [Verfasser]. "System Performance Gains from Smart Antenna Concepts in CDMA / Mirko Schacht." Aachen : Shaker, 2005. http://d-nb.info/1181620074/34.
Повний текст джерелаNg, Stewart Siew Loon. "Smart antenna in DS-CDMA mobile communication system using circular array /." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Mar%5FNg.pdf.
Повний текст джерелаYoon, Hwan-Sik. "Design, Modeling, and Optimization of a Mechanically Reconfigurable Smart Reflector Antenna System." The Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1036426477.
Повний текст джерелаKhallaayoun, Ahmed. "High resolution direction of arrival estimation analysis and implementation in a smart antenna system." Thesis, Montana State University, 2010. http://etd.lib.montana.edu/etd/2010/khallaayoun/KhallaayounA0510.pdf.
Повний текст джерелаChoi, Junsung. "Latency Study and System Design Guidelines for Cooperative LTE-DSRC Vehicle-to-Everything (V2X) Communications including Smart Antenna." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/78083.
Повний текст джерелаMaster of Science
Panique, Michael David. "Design and evaluation of test bed software for a smart antenna system supporting wireless communication in rural areas." Thesis, Montana State University, 2008. http://etd.lib.montana.edu/etd/2008/panique/PaniqueM0508.pdf.
Повний текст джерелаHwang, Seung-Hyeon. "Adaptive antenna techniques for smart antennas and radar systems." Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2005. http://wwwlib.umi.com/cr/syr/main.
Повний текст джерелаDorni, Aljoša. "IEEE 802.11 Networks: MAC Protocols for Heterogeneous Multi-Antenna Scenarios and Software-Defined Radio PHY Layer Implementation." Doctoral thesis, Università degli studi di Trieste, 2013. http://hdl.handle.net/10077/8538.
Повний текст джерелаThe objective of this thesis is to discuss the performance achieved by IEEE 802.11 networks, considering in detail their simulation and experimental analysis, as well as the implementation aspects. The original contribution of this dissertation involves three main research fields within the context of distributed wireless networks: the experimental and theoretical analysis of IEEE 802.11e networks in presence of quality of service mechanisms, the development and the simulation of backward compatible medium access control protocols in presence of smart antenna systems, and, finally, the implementation of the IEEE 802.11ag physical layer on software-defined radio platforms.
L’obiettivo di questa tesi è discutere le prestazioni ottenibili nelle reti IEEE 802.11, prendendo in considerazione sia la loro simulazione ed analisi sperimentale, sia gli aspetti implementativi. Il contributo originale di questa tesi include tre argomenti principali che riguardano le reti wireless distribuite: l’analisi sperimentale e teorica delle reti 802.11e che adottano meccanismi di qualità del servizio, lo sviluppo e la simulazione di schemi di accesso multiplo retrocompatibili basati sull’utilizzo di sistemi di antenne intelligenti, e, infine, l’implementazione su piattaforme software-defined radio del livello fisico 802.11ag.
XXV Ciclo
1980
Palantei, Elyas. "Switched Parasitic Smart Antenna: Design and Implementation for Wireless Communication Systems." Thesis, Griffith University, 2012. http://hdl.handle.net/10072/366219.
Повний текст джерелаThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
Griffith School of Engineering
Science, Environment, Engineering and Technology
Full Text
OLIVEIRA, Elias Marques Ferreira De. "Desenvolvimento de sistema inteligente de controle de arranjo de antenas para aplicação no sistema Celpe." Univesidade Federal de Pernambuco, 2016. https://repositorio.ufpe.br/handle/123456789/18271.
Повний текст джерелаMade available in DSpace on 2017-01-30T18:03:51Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Dissertação - Elias Marques V4.2 (Revisão Biblioteca).pdf: 4899848 bytes, checksum: 78834b022de3c1d5eb7fcee1273f65c7 (MD5) Previous issue date: 2016-02-22
FACEPE
Este trabalho de dissertação apresenta a concepção e implantação de um sistema controlador de arranjo de antenas capaz de integrar-se a uma rede de comunicação SCADA e direcionar o diagrama de radiação de um arranjo de antenas, garantindo melhor comunicação entre estação base e remota. É apresentado um circuito de RF capaz de realizar o controle automático das fases de alimentação de um arranjo de antenas composto por diversos dispositivos de RF, incluindo um defasador de 8 bits. São apresentados testes destes dispositivos bem como a caracterização de ramos constituídos por estes componentes. Desenvolveu-se também um circuito controlador de arranjo de antenas que desempenha funções de identificação de endereços e determina as fases a serem utilizadas no controle dos defasadores. O circuito foi testado em um projeto piloto no campus da UFPE e está instalado na subestação da CELPE na cidade de Gravatá, no interior do estado de Pernambuco.
This dissertation presents the design and implementation of a Antenna Array Controller System capable of integrating into a SCADA network and directing the main radiation lobe, granting best communication between base and remote stations. An RF circuit is presented capable of automatically controlling the phases fed to the antenna array composed by several RF devices, including an 8-bit phase shifter. Tests of the devices and the characterization of braches composed by them are shown. In addition, an antenna array controller has been developed to perform functions that include the identification of an address and the determination of the phase to be used in the phase shifters’ control. The circuit was tested in a pilot project at the UFPE campus and is installed at a CELPE substation in the city of Gravatá.
Elfarawi, Shaaban M. "Indoor CDMA capacity using smart antenna base station." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0019/MQ54885.pdf.
Повний текст джерелаYu, Xiaoming. "Multibeam smart antenna systems for wireless communications." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0034/NQ66298.pdf.
Повний текст джерелаZhou, Wei. "Autonomous smart antenna systems for future mobile devices." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/9959.
Повний текст джерелаHaghdad, Mehdi, and Kamilo Feher. "PSEUDO ERROR DETECTION IN SMART ANTENNA/DIVERSITY SYSTEMS." International Foundation for Telemetering, 2003. http://hdl.handle.net/10150/605363.
Повний текст джерелаAn implementation of a Pseudo Error Detection (PSED) system is presented and its performance in conjunction with smart antenna and smart diversity systems tested and evaluated. Non redundancy, instant response and relative simplicity make the Pseudo Error Detectors excellent real time error monitoring systems in smart antenna and smart diversity systems. Because of the Non-redundant Error Detection mechanism in Pseudo Error Detectors, we can monitor the error quality without any coding or overhead. The output of the pseudo error detector in AWGN, selective fading Doppler shift and other interference environments is directly correlated to the BER and BLER. This direct correlation makes it a great tool for online error monitoring of a system and can have numerous applications In a PSED the Eye diagram from the demodulator is sampled once per symbol. By monitoring and comparison of the eye at sampled intervals at different thresholds, we would know if an error has occurred. By integrating this result over a period of time we can get the averaged error level. The results provided in this paper were obtained and verified by both MatLab simulations using dynamic simulation techniques and hardware measurements over dynamic channels.
Lei, Yu. "Resource Management with Smart Antenna in CDMA Systems." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/30876.
Повний текст джерелаMaster of Science
Chim, Kwok Chi. "Investigating the impact of smart antenna on SAR /." View Abstract or Full-Text, 2002. http://library.ust.hk/cgi/db/thesis.pl?ELEC%202002%20CHIM.
Повний текст джерелаIncludes bibliographical references (leaves 53-54). Also available in electronic version. Access restricted to campus users.
Puska, H. (Henri). "Code acquisition in direct sequence spread spectrum systems using smart antennas." Doctoral thesis, University of Oulu, 2009. http://urn.fi/urn:isbn:9789514290497.
Повний текст джерелаTiivistelmä Tässä väitöstyössä tutkitaan suorahajotushajaspektrijärjestelmän (DS/SS, direct sequence spread spectrum) koodisynkronoinnin etsintävaihetta, kun vastaanottimessa käytetään älyantennia. Koodisynkronoinnilla tarkoitetaan järjestelmän käyttämän hajotuskoodin ajastuksen synkronointia vastaanottimessa. Johdannon jälkeen esitetään kirjallisuuskatsaus koodisynkronointiin sekä tuodaan esille kirjallisuudesta löytyviä tutkimustuloksia aihepiiristä seuraavissa tilanteissa: häipyvä kanava, Doppler-ilmiö, tahallinen häirintä, monikäyttöhäiriö, muiden järjestelmien aiheuttama häiriö sekä moniantennijärjestelmät. Tämän jälkeen esitetään yleiskatsaus älyantenneihin kohdistuen erityisesti digitaalisiin keilanmuodostus- sekä suuntaestimointialgoritmeihin. Työn loppuosa keskittyy kirjoittajan omaan tutkimukseen aiheesta. Tämän nippuväitöskirjan alkuperäiset artikkelit on luokiteltu kahteen ryhmään niiden sisältöön perustuen. Ensimmäinen ryhmä käsittelee DS/SS-järjestelmän koodisynkronoinnin etsintävaiheen suorituskykyä tahallisessa häirinnässä tutkimalla, miten hyvin erilaiset keilanmuodostusalgoritmit kykenevät poistamaan kapea- ja leveäkaistaisia häirintäsignaaleja tilanteessa, jossa hyötysignaalin tulosuunta tiedetään. Tutkimustulokset osoittavat, että monet tilatason keilanmuodostusalgoritmit kykenevät poistamaan useita erityyppisiä häirintäsignaaleita, jos ne eivät saavu hyötysignaalin kanssa samasta suunnasta. Mikäli kulmaero hyöty- ja häirintäsignaalien välillä ei ole riittävä, joudutaan käyttämään rakenteeltaan monimutkaisempia menetelmiä. Toinen ryhmä artikkeleita keskittyy synkronointiin liittyvien todennäköisyyksien ja keskimääräisen etsintäajan teoreettiseen analyysiin. Jos hyötysignaalin tulosuunta on tuntematon, voidaan kulmaepävarmuusalue jakaa pieniin kulmasoluihin käyttäen keilanmuodostustekniikoita, kuten kirjallisuudessa esitetään. Tällöin kyseessä on kaksiulotteinen (viive-kulma) etsintäongelma. Tässä työssä kyseistä tutkimusaihetta laajennetaan koskemaan myös edistyneet keilanmuodostusmenetelmät, koska ne tarjoavat parantuneen häiriönvaimennuskyvyn. Työssä osoitetaan, että viive-kulma menetelmän suorituskykyä voidaan parantaa joissakin tilanteissa lisäämällä järjestelmään suuntaestimaattori, koska se saattaa vähentää tarvittavien kulmasolujen lukumäärää. Lisäksi tutkitaan sellaista pienimmän keskineliövirheen (MMSE, minimum mean square error) keilanmuodostusmenetelmää, jossa ainoastaan yhtä hajotuskoodin koodijaksoa käytetään opetukseen. Kyseisellä menetelmällä todettiin olevan parempi suorituskyky kuin viive-kulma etsinnällä, koska MMSE-menetelmä ei tarvitse suuntainformaatiota. Tässä työssä ei kuitenkaan löydetty yhtä sellaista menetelmää, jonka suorituskyky on muita parempi kaikissa tilanteissa
Lakshmanan, Sriram. "Securing wireless networks against eavesdropping using smart antennas." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/26698.
Повний текст джерелаCommittee Chair: Raghupathy, Sivakumar; Committee Member: Farmarz Fekri; Committee Member: Mary Ann, Ingram. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Kavak, Adnan. "Vector propagation channel studies for smart antenna wireless communication systems /." Full text (PDF) from UMI/Dissertation Abstracts International, 2000. http://wwwlib.umi.com/cr/utexas/fullcit?p3004302.
Повний текст джерелаNoordin, Nurul Hazlina. "Adaptive array antenna design for wireless communication systems." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/8950.
Повний текст джерелаDurrani, Salman. "Investigations into smart antennas for CDMA wireless systems /." [St. Lucia, Qld.], 2004. http://adt.library.uq.edu.au/public/adt-QU20041201.165143/index.html.
Повний текст джерелаHu, Bin. "Multicarrier DS-CDMA communication systems using smart antennas." Thesis, University of Southampton, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.430726.
Повний текст джерелаMarikar, Shakheela H. "Resource Management In 3G Systems Employing Smart Antennas." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/30875.
Повний текст джерелаMaster of Science
Torlak, Murat. "Estimation and capacity of channels in smart antenna wireless communication systems /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.
Повний текст джерелаAbusultan, Monther Younis. "Digital implementation of direction-of-arrival estimation techniques for smart antenna systems." Thesis, Montana State University, 2010. http://etd.lib.montana.edu/etd/2010/abusultan/AbusultanM0510.pdf.
Повний текст джерелаYiu, Candy. "High Speed Wireless Networking for 60GHz." PDXScholar, 2011. https://pdxscholar.library.pdx.edu/open_access_etds/373.
Повний текст джерелаStridh, Rickard. "Smart Antennas in Wireless Networks : Systems Issues and Performance Limits." Doctoral thesis, KTH, Signals, Sensors and Systems, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3467.
Повний текст джерелаThis work deals with performance limits when using smartantennas in future wireless systems. The current evolution inthe field of wireless communication implicates a substantiallyincreased demand on transport capacity. Smart antennas is onevery powerful means to fulfill these demands. In this work theuse of smart antennas, deployed at either the access point orboth the access point and the mobile terminal isinvestigated.
In order to find out how the evolution within wirelesscommunication will continue during the ten years to come, ascenario analysis is performed where driving forces areidentified and scenarios are created.
The system aspects of uplink and downlink communicationsutilizing smart antenna algorithms are investigated. For theuplink case, the impact of different smart antenna algorithmson a packet switched radio interface is investigated. In thedownlink case, the use of joint optimal beamforming and powercontrol is examined and compared to suboptimal downlinkalgorithms. Further, an algorithm for admission control isintroduced and evaluated and the issue of optimal access pointassignment is assessed.
The extension to use smart antennas with both multipletransmitters and multiple receivers, i.e. dual arrays, canprovide high link capacity in future wireless systems. Ananalysis of indoor environment channel measurements in the 5.8GHz band is performed and the possible increase in linkcapacity is examined. It is found that in the measured indoorenvironment, the scattering is sufficiently rich to providesubstantial link capacity increase and that moderateintra-antenna-element distances is enough to give this capacityincrease.
It is concluded that smart antennas promise substantialcapacity increase and remains a strong enabling technology forfuture systems for wireless communication
Soodmand, Soheyl. "Optimised inductively coupled reader antennas for smart HF RFID systems." Thesis, University of Surrey, 2015. http://epubs.surrey.ac.uk/807246/.
Повний текст джерелаHuang, Fei, and 黄菲. "Design and analysis of transmission protocols in wireless networks with smart antennas." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B46421610.
Повний текст джерелаKim, Sang-youb. "A fast estimation algorithm of array response vector for adaptive smart antenna systems /." Digital version accessible at:, 2000. http://wwwlib.umi.com/cr/utexas/main.
Повний текст джерелаKongara, Gopichand V. R. "Performance of a smart base station antenna in IS-136 cellular systems." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0004/MQ36710.pdf.
Повний текст джерелаTang, Hongyan. "Non-mechanical phase shifting techniques for semi-smart mobile basestation antenna systems." Thesis, Queen Mary, University of London, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.498269.
Повний текст джерелаAlam, Fakhrul. "Space Time Processing for Third Generation CDMA Systems." Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/29669.
Повний текст джерелаPh. D.
Tin, Noel Tai-Tung. "An experimental system for characterizing wideband CDMA vector channels and smart antennas." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ55935.pdf.
Повний текст джерелаPan, Yaobin. "Impact of DOA (direction of arrival) : in 4G MIMO Systems." Thesis, Linnéuniversitetet, Institutionen för fysik och elektroteknik (IFE), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-42158.
Повний текст джерелаPetrus, Paul. "Novel Adaptive Array Algorithms and Their Impact on Cellular System Capacity." Diss., Virginia Tech, 1997. http://hdl.handle.net/10919/30375.
Повний текст джерелаPh. D.
Juswardy, Budi. "Integrated broadband microphotonic beamformer for adaptive nulling in smart antennas." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2010. https://ro.ecu.edu.au/theses/1843.
Повний текст джерелаKhosrowabadi, Allen, Richard Gurr, and Amy Fleishans. "SUBMINIATURE GPS INERTIAL TIME SPACE POSITION INFORMATION." International Foundation for Telemetering, 2000. http://hdl.handle.net/10150/608299.
Повний текст джерелаIn the past few years, GPS has proven itself as an effective source of time space position information (TSPI) data for air vehicles. Currently, GPS truth systems are used to track aircraft ranging from low dynamic vehicles to high dynamic fighters. However, low-cost GPS TSPI instrumentation is not currently available for stores and weapons delivered by air vehicles. To date, data is collected by tracking dropped items using radar or optical means. This process is costly and time consuming. The purpose of this project is to leverage the recent advances in micro-electromechanical systems (MEMS) technology to develop a subminiature, inexpensive, low power, disposable telemetrytransmitting package. The purpose of this transmitting package is to up-link the GPS positional data from the weapon or store to the host aircraft. This data is then retransmitted by the host aircraft to a ground station and/or recorded on board for post processing. The transmission of the data to the host aircraft can provide near real- time position data for the released object. The transmitting package must have a unique identification method for application in tracking multiple objects. Since most of the systems used in weapons testing will be destroyed, it is extremely important to keep the development and maintenance cost low. In addition, the package must be non-intrusive to avoid any significant modification to the weapon and to facilitate quick instrumentation of the weapon for test and evaluation.
PAIVA, ANA PAULA DE LACERDA. "PERFORMANCE OF JOINT DETECTION RECEIVERS TD/CDMA SYSTEM WITH AND WITHOUT USING SMART ANTENNAS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1999. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=7269@1.
Повний текст джерелаSeveral multiple acess techniques are under discussion for third generation cellular systems. One of them is based on a hybrid time division, code division multiple acess (TD/CDMA). Since in this acess technique all users sharing the same slot are time synchronized, it is possible to jointly detect the different user signals arriving at the base station, eliminating both intersymbol and multiple acess interferences. Besides the use of techniques aiming to improve the receiver performance, another way to increase the capacity of a cellular system is adaptive antennas at the base station. A simulation tool was developed to verify the performance of a TD/CDMA system with with and without joint detection in three different situations: varying the number of simultaneous active users, in presence of failures on the power control mechanism and in presence of imprecisions of the channel estimator. It was compared also the performance of both receivers considering the effects of using smart antennas. The obtained results indicate that, in spite of increasing system complexity, the use of joint detection receivers might be a better option since its performance wes shown to be significantly better than that of conventional CDMA receivers.
Várias técnicas de múltiplo acesso estão sob discussão para sistemas celulares de 3a. geração. Uma delas é baseada em um sistema híbrido TD/CDMA (Time Division, Code Division Multiple Access). Neste sistema os sinais de todos os usuários simultaneamente ativos são síncronos, o que permite o emprego de receptores de detecção conjunta. Estes receptores conseguem cancelar idealmente as componentes de interferência de múltiplo acesso e entre símbolos e assim apresentam desempenho superior aos receptores CDMA convencionais. Além do desenvolvimento de receptores com melhor desempenho, outra técnica para aumentar a capacidade dos sistemas celulares é o emprego de antenas inteligentes. Neste trabalho, uma ferramenta de simulação foi desenvolvida para verificar o desempenho de sistemas TD/CDMA com e sem o emprego de receptores de detecção conjunta, em três situações: com a variação do número de usuários, considerando-se falhas no mecanismo de controle de potência e de estimação do canal. Adicionalmente, foi estudada a conveniência do emprego antenas inteligentes em conjunto com receptores CDMA convencionais e com detecção conjunta. Os resultados obtidos indicam que, apesar de aumentar a complexidade do sistema, o uso de receptores de detecção conjunta é bastante atraente, já que seu desempenho mostrou-se significativamente superior ao dos receptores CDMA convencionais.
Do-Hong, Tuan [Verfasser]. "Wideband Direction-of-Arrival Estimation and Wideband Beamforming for Smart Antenna Systems / Tuan Do-Hong." Aachen : Shaker, 2004. http://d-nb.info/1170534392/34.
Повний текст джерелаNewhall, William George. "Radio Channel Measurements and Modeling for Smart Antenna Array Systems Using a Software Radio Receiver." Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/27115.
Повний текст джерелаPh. D.
De, Kuo Ren, and 郭仁德. "Design of 2.4GHz Smart Antenna System Testbed." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/89717646372452611148.
Повний текст джерела中原大學
電子工程學系
88
In wireless communication, smart antenna system can be used to suppress multipath fading by antenna diversity and increase system capacity by supporting multiple cochannel users in reception and transmission. The purpose of this thesis is to design a testbed, which has the function of smart antenna system. This testbed is helpful for the research, evaluation and provability of smart antenna system algorithm and vector propagation channel modeling. First, we''re going to introduce the specifications of this system, also the circuit design and fabrication for the three main modules (RF module, Baseband module and Common module), which comprise this testbed. The RF module consists of transmitter and receiver unit . Most of the components in the above unit have been tested and meet the specifications. The Baseband module consists of DAQ unit and I/O interface. Circuits of DAQ unit have been designed and realized. Also the control programs between I/O interface and the control unit of common module have been finished and an elementary test has been done. The Common module consists of synthesizer, control unit and mother broad. The synthesizer has been realized and tested, and the circuits of mother broad have been designed well.
Kao, Ming-tse, and 高銘澤. "Indoor Location Estimation Using Smart Antenna System." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/51559282224551739713.
Повний текст джерела國立中央大學
通訊工程研究所
100
During the last few years, Wireless LAN (WLAN) has been rapidly growing and becoming more and more popular. In particular, the techniques of indoor location estimation are receiving a lot of attentions due to wide variety of service such as building the medical health care, tracking people for security issue, sustaining emergency supplement system, providing directional guidance, and so on. With the matured indoor location technology, the new demand on wireless applications is location-based service (LBS). It is toward the usage for the business, public securities and safety requirements. Therefore, increasing the accuracy of positioning is a significant issue for indoor location technologies. In indoor environments, the shadowing of positioning environment, the multi-path and reflection phenomenon make the position estimation inaccurate. In traditional location fingerprint method shows that more Access Point (AP) deployments can obtain enough Receive Signal Strength (RSS) information to describe signal characteristics of the target space. However, it does not make sense and increase waste costs. On the other hand, insufficient AP deployments would significantly downgrade the accuracy of position estimation, because RSS information which is measured for the target object could be not enough. This thesis provides a novel indoor positioning solution to increase the accuracy of location estimation by gathering abundant RSS from the AP which has multi-antennas architecture. Since the AP equipped multi-antennas, the AP gathers RSS from all of antenna sets periodically. This system obtains enough RSS to compute the user position. Experimental results show that the proposed indoor location estimation demonstrates a high accuracy of positioning and outstanding performance while RSS is collected by smart antenna technique. Our proposed method not only achieves the high-precision positioning but also provides a rational deployments of cost in indoor location environments. The numerical results show that the accuracy is increased from 1.34% to 92.4% and the error variance is reduced by 96% as compared to the traditional location fingerprint method.