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dc.contributor.advisorGezici, Sinan
dc.contributor.authorTutay, Mehmet Emin
dc.date.accessioned2016-01-08T18:17:12Z
dc.date.available2016-01-08T18:17:12Z
dc.date.issued2010
dc.identifier.urihttp://hdl.handle.net/11693/15349
dc.descriptionAnkara : The Department of Electrical and Electronics Engineering and the Institute of Engineering and Sciences of Bilkent University, 2010.en_US
dc.descriptionThesis (Master's) -- Bilkent University, 2010.en_US
dc.descriptionIncludes bibliographical references leaves 70-74.en_US
dc.description.abstractIn transmitted-reference (TR) and frequency-shifted reference (FSR) ultrawideband (UWB) systems, data and reference signals are shifted relative to each other in time and frequency domains, respectively. The main advantage of these systems is that they remove strict requirements of channel estimation. In order to implement TR UWB systems, an analog delay line, which is difficult to build in an integrated fashion, is needed. Although FSR systems require frequency conversion at the receiver, which is much simpler in practice, they have data rate limitations. Instead, a code-multiplexed transmitted-reference (CM-TR) UWB system that transmits data and reference signals using two distinct orthogonal codes can be considered. This system requires a simpler receiver and has better performance than TR and FSR. In the first part of the thesis, CM-TR systems are investigated and probability of error expressions are obtained. For the single user case, a closed-form expression for the exact probability of error is derived. For the multiuser case, a closed-form expression is derived based on the Gaussian approximation, and the results are compared in different scenarios. In the second part of the thesis, some optimal and suboptimal receivers are studied. First, low complexity receivers, such as the blinking receiver (BR) and the chip discriminator, are presented. The requirements for these types of receivers are explained, and the conditions under which their performance can be improved are discussed. Then, an analytical analysis of the linear minimum mean-squared error (MMSE) receiver and the requirements to implement this MMSE receiver are provided. Lastly, the optimal maximum-likelihood (ML) detector is derived, which has higher computational complexity and more strict requirements than the other receivers. Finally, simulation results are presented in order to verify the theoretical results and to compare the performance of the receivers.en_US
dc.description.statementofresponsibilityTutay, Mehmet Eminen_US
dc.format.extentxi, 74 leavesen_US
dc.language.isoEnglishen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectUltra-wideband (UWB)en_US
dc.subjectimpulse radio (IR)en_US
dc.subjectmultiple-access interference (MAI)en_US
dc.subjecttransmitted-reference (TR)en_US
dc.subjectfrequency-shifted reference (FSR)en_US
dc.subjectcoded-multiplexed transmitted-reference (CM-TR)en_US
dc.subjectblinking receivers (BR)en_US
dc.subjectchip discriminatoren_US
dc.subjectlinear MMSEen_US
dc.subjectmaximum-likelihood (ML)en_US
dc.subject.lccTK5103.4 .T88 2010en_US
dc.subject.lcshUltra-wideband devices.en_US
dc.subject.lcshBroadband communication systems.en_US
dc.subject.lcshWireless communication systems.en_US
dc.titleReceiver design and performance analysis for code-multiplexed transmitted-reference ultra-wideband systemsen_US
dc.typeThesisen_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.publisherBilkent Universityen_US
dc.description.degreeM.S.en_US


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