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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal align=center style='text-align:center'><b><span style='font-size:16.0pt;line-height:115%;font-family:"Tahoma","sans-serif"'>MS Thesis Defense<o:p></o:p></span></b></p><p class=MsoNormal align=center style='text-align:center'><b><span style='font-size:16.0pt;line-height:115%;font-family:"Tahoma","sans-serif"'>USRP2 Implementation of OFDM Channel Estimation Using Compressive Sensing<o:p></o:p></span></b></p><p class=MsoNormal align=center style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:center;line-height:150%'><b><span style='font-size:14.0pt;line-height:150%;font-family:"Tahoma","sans-serif"'>Tina Jayce Mathews</span></b><b><span style='font-size:12.0pt;line-height:150%;font-family:"Tahoma","sans-serif"'><o:p></o:p></span></b></p><p class=MsoNormal align=center style='margin-bottom:0in;margin-bottom:.0001pt;text-align:center;line-height:normal'><b><span style='font-size:12.0pt'>Date:</span></b><span style='font-size:12.0pt'> <b>Monday, October 1, 2012</b><o:p></o:p></span></p><p class=MsoNormal align=center style='margin-bottom:0in;margin-bottom:.0001pt;text-align:center;line-height:normal'><span style='font-size:12.0pt'><o:p> </o:p></span></p><p class=MsoNormal align=center style='margin-bottom:0in;margin-bottom:.0001pt;text-align:center;line-height:normal'><b><span style='font-size:12.0pt'>Location:</span></b><span style='font-size:12.0pt'> Electrical Engineering Conference Room – N328<o:p></o:p></span></p><p class=MsoNormal align=center style='margin-bottom:0in;margin-bottom:.0001pt;text-align:center;line-height:normal'><b><span style='font-size:12.0pt'>Time:</span></b><span style='font-size:12.0pt'> 10:00 AM<o:p></o:p></span></p><p class=MsoNormal align=center style='margin-bottom:0in;margin-bottom:.0001pt;text-align:center;line-height:normal'><span style='font-size:12.0pt'><o:p> </o:p></span></p><p class=MsoNormal align=center style='margin-bottom:0in;margin-bottom:.0001pt;text-align:center;line-height:normal'><b><span style='font-size:12.0pt'>Committee Chair: </span></b><span style='font-size:12.0pt'>Dr. Zhu Han<o:p></o:p></span></p><p class=MsoNormal align=center style='margin-bottom:0in;margin-bottom:.0001pt;text-align:center;line-height:normal'><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal align=center style='margin-bottom:0in;margin-bottom:.0001pt;text-align:center;line-height:normal'><b><span style='font-size:12.0pt'>Committee Members: <span style='color:#1F497D'><o:p></o:p></span></span></b></p><p class=MsoNormal align=center style='margin-bottom:0in;margin-bottom:.0001pt;text-align:center;line-height:normal'><span style='font-size:12.0pt'>Dr. E.J. Charlson<b><o:p></o:p></b></span></p><p class=MsoNormal align=center style='margin-bottom:0in;margin-bottom:.0001pt;text-align:center;line-height:normal'><span style='font-size:12.0pt'>Dr. Rong Zheng<o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:normal'><span style='font-size:12.0pt'><o:p> </o:p></span></p><p class=MsoNormal align=center style='margin-bottom:0in;margin-bottom:.0001pt;text-align:center;line-height:normal'><span style='font-size:12.0pt'><o:p> </o:p></span></p><p class=MsoNormal style='text-align:justify;text-indent:.5in;line-height:200%'><span style='font-size:12.0pt;line-height:200%'>Radio channel impairment is a major concern in any wireless system. Channel estimation is performed at the receiver to obtain the channel response in order to calculate the multipath channel effects. However the traditional way of using pilots for channel estimation has a tradeoff between spectral efficiency and estimation accuracy. An increasing amount of research is being done on a novel signal processing technique called compressive sensing and its applications in the modern day wireless systems for channel estimation. <o:p></o:p></span></p><p class=MsoNormal style='text-align:justify;text-indent:.5in;line-height:200%'><span style='font-size:12.0pt;line-height:200%'>The aim of this thesis is to investigate various modulation schemes in a software based radio development kit, GNU Radio for a wireless system and build a Compressed Sensing based Channel Estimator for the OFDM module on a Universal Software Radio Peripheral 2 (USRP2). Simulations for compressed channel sensing were conducted to prove the effectiveness over traditional channel estimation. The time domain based compressed channel estimator was implemented as a signal processing package in GNU Radio and performance studies were done. <o:p></o:p></span></p><p class=MsoNormal style='text-align:justify;line-height:200%'><span style='font-size:12.0pt;line-height:200%'><o:p> </o:p></span></p><p class=MsoNormal style='text-align:justify;line-height:200%'><o:p> </o:p></p></div></body></html>