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dc.contributor.authorBrisebois, Terrenceen_US
dc.date.accessioned2014-03-14T20:41:15Z
dc.date.available2014-03-14T20:41:15Z
dc.date.issued2009-07-07en_US
dc.identifier.otheretd-07092009-103656en_US
dc.identifier.urihttp://hdl.handle.net/10919/33943
dc.description.abstractThe goal of software-defined radio (SDR) is to move the processing of radio signals from the analog domain to the digital domain â to use digital microchips instead of analog circuit components. Until faster, higher-precision analog-to-digital (ADCs) and digital-to-analog converters (DACs) become affordable, however, some analog signal processing will be necessary. We still need to convert high-radio frequency (RF) signals that we receive to low intermediate-frequency (IF) or baseband (centered on zero Hz) signals in order for ADCs to sample them and feed them into microchips for processing. The reverse is true when we transmit. Amplification is also needed on the receive side to fully utilize the dynamic range of the ADC and power amplification is needed on the transmit side to increase the power output from the DAC for transmission. Analog filtering is also needed to avoid saturating the ADC or to filter out interference when receiving and to avoid transmitting spurs. The analog frequency conversion, amplification and filtering section of a radio is called the RF front end. This thesis describes work on a new RF front end daughterboard for the Universal Software Radio Peripheral, or USRP. The USRP is a software-radio hardware platform designed to be used with the GNU Radio software radio software package. Using the Motorola RFIC4 chip, the new daughterboard receives RF signals, converts them to baseband and does analog filtering and amplification before feeding the signal into the USRP for processing. The chip also takes transmit signals from the USRP, converts them from baseband to RF and amplifies and filters them. The board was designed and laid out by Randall Nealy. I wrote the software driver for GNU Radio. The driver defines the interface between the USRP and the RFIC chip, controls the physical settings, and calculates and sets the hundreds of variables necessary to operate this extremely complex chip correctly. It allows plug-and-play compatibility with the current USRP daughterboards and supplies additional functions not available in any other daughterboard.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartbrisebois-thesis-draft10.pdfen_US
dc.rightsI hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Virginia Tech or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.en_US
dc.subjectUSRPen_US
dc.subjectradio hardwareen_US
dc.subjectland mobile radioen_US
dc.subjectpublic safetyen_US
dc.subjectGNU Radioen_US
dc.subjectMotorola RFICen_US
dc.subjectSPI interfaceen_US
dc.subjectPythonen_US
dc.subjectsoftware radioen_US
dc.titleWideband RF Front End Daughterboard Based on the Motorola RFICen_US
dc.typeThesisen_US
dc.contributor.departmentElectrical and Computer Engineeringen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineElectrical and Computer Engineeringen_US
dc.contributor.committeechairBostian, Charles W.en_US
dc.contributor.committeememberDavis, William A.en_US
dc.contributor.committeememberMacKenzie, Allen B.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-07092009-103656/en_US
dc.date.sdate2009-07-09en_US
dc.date.rdate2012-05-07
dc.date.adate2009-07-20en_US


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