پديد آورنده :
ميرمقتدايي، وحيد
عنوان :
طراحي و شبيه سازي يك فرستنده راديو ضربه فراپهن باند براي بهبود عملكرد توامان با سيستمهاي باند باريك
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده برق و كامپيوتر
صفحه شمار :
يازده،[107]ص: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
علي فتوت احمدي، ابوالقاسم زيدآبادي نژاد
استاد مشاور :
رسول دهقاني
توصيفگر ها :
توليد كننده پالس UWB , همزيستي با سيستم باند باريك , 802.11aWLAN , BER , طيف فركانسي داراي صفر
تاريخ نمايه سازي :
9/10/92
استاد داور :
مهدي فخرايي، مسعود سيدي، مهدي حبيبي، اصغر غلامي
دانشكده :
مهندسي برق و كامپيوتر
كد ايرانداك :
ID583 دكتري
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
A New IR UWB Transmitter to Improve Coexistence Performance of UWB and Narrowband Systems Sayed Vahid Mir Moghtadaei moghtada@yahoo com November 3 2013 Department of Electrical and Computer Engineering Isfahan University of Technology Isfahan 84156 83111 Iran st Supervisor Abolghasem Zeidaabadi Nezhad zeidabad@cc iut ac ir nd Supervisor Ali Fotowat Ahmady afotowat@sharif edu st Advisor Wouter A Serdijn nd Advisor Rasoul Dehghani Department Graduate Program Coordinator Masood Omoomi Isfahan University of Technology Isfahan Iran Sharif University of Technology Tehran Iran Delft University of Technology Mekelweg CD Delft the Netherlands Abstract A new ultra wideband UWB pulse generator covering a dB bandwidth of GHz with a tunable center frequency of GHz to mitigate coexistence issues of impulse radio UWB IR UWB systems and IEEE a WLAN or other narrowband NB systems in nm CMOS technology is proposed The UWB pulse is generated based on frequency up conversion of the first derivative of the Gaussian pulse which creates an adjustable null in the frequency spectrum Simulation results show that employing the proposed pulse generator mitigates the mutual interference between UWB and WLAN systems significantly The proposed transmitter consists of a low frequency signal LFS generator an LC oscillator and a mixer whose output directly drives the antenna using a matching on chip transformer Two control signals change the bandwidth and center frequency of the transmitted spectrum depending on the NB frequency and considering process supply voltage and temperature PVT variations A fast start up circuit is used in the LC oscillator using current pulse injection and together with the mixer is duty cycled to reduce the power consumption Post layout simulation results show a null depth of dB for a null bandwidth of MHz which is enough for NB systems The energy pulse and energy pulse normalized to the output voltage amplitude are pJ pulse and pJ pulse V from a V supply for a pulse rate of Mpulse s with an active circuit area of only mm Key Words UWB pulse generator narrowband interference avoidance IEEE a WLAN BER performance spectrum null PDF created with pdfFactory trial version www pdffactory com
استاد راهنما :
علي فتوت احمدي، ابوالقاسم زيدآبادي نژاد
استاد مشاور :
رسول دهقاني
استاد داور :
مهدي فخرايي، مسعود سيدي، مهدي حبيبي، اصغر غلامي
