Ultra-Wideband N-Bit Digitally Tunable Pulse Generator

Yilmaz, Sertac; Tekin, İbrahim

doi:10.1109/icu.2005.1570027

Cited by 15 publications

(5 citation statements)

References 5 publications

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“…Pulse generators using step recovery diodes and tunneling diodes have fast transition time (<100 ps) and are usually used for generating steep edged pulses [33,[40][41][42][43]. However, these diodes are expensive and difficult to integrate into a standard CMOS process.…”

Section: Discussionmentioning

confidence: 99%

Gaussian pulse approximation using standard CMOS and its application for sub‐GHz UWB impulse radio

Zhang

El-Gamel

Bayoumi

2008

Circuit Theory & Apps

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SUMMARYGaussian pulse is widely used in communication systems. The true Gaussian function is not physically realizable, but it can be approximated through linear functions. This paper presents a Gaussian pulse approximation approach to generate a quasi-Gaussian pulse by using the transient response of a CMOS inverter. The basic structure of the proposed design includes a digital variable square pulse generator, a Gaussian pulse generator and a small antenna model. The digital variable square pulse generator makes the amplitude and width of the generated quasi-Gaussian pulse tunable. The proposed pulse generator works well for three different electrical small antenna models. The simulation results show that the generated pulse approximates the Gaussian shape very well and the radiated signal at the antennas is compliant with the Federal Communication Commission's spectral mask for the 0-960 MHz band. The simple structure of this Gaussian pulse generator lends itself to a low-power, single-chip UWB transceiver solution.

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Section: Discussionmentioning

confidence: 99%

Gaussian pulse approximation using standard CMOS and its application for sub‐GHz UWB impulse radio

Zhang

El-Gamel

Bayoumi

2008

Circuit Theory & Apps

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“…Türklerin 1071 yılında Anadolu'ya gelmesi ile birlikte kentin kültü rel mozaiği çeşitlenmiştir. Bu çeşitlenme yerleşmenin arazi yapısının da etkisi ile kentsel dokuya yansımış, yukarı Talas'ta ağırlıklı olarak Gayri Müslimler (Ermeniler, Rumlar), Aşağı Talas'ta ise Müslüman lar yaşamıştır (Yılmaz, 2005). Envanter Çalışması her iki alanda yer alan geleneksel yapıları içerecek biçim¬ de geniş bir çerçevede gerçekleştirilmiştir.…”

Section: Talas (Kayseri̇) Kentsel Kültür Varliklari Envanteri̇ (2007 -2unclassified

Talas (Kayseri̇) Kentsel Kültür Varliklari Envanteri̇ (2007 - 2009) 1

Büyükmihçi¹,

Bakır²,

Eldek³

2009

tubaked

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The cultural heritage of Talas, an important village in Kayseri, was documented by a project team of eleven individuals between the summer of 2007 and the winter of 2009. This took place in the context of the documentation of cultural heritage as carried out by Turkish Cultural Branch of the Turkish Academy of Sciences (TÜBA-TÜKSEK). Site surveys were carried out by two teams in two areas determined by the topography of Talas. The first, a level area of fields is located close to the Kayseri city center, and the second, on the lower slopes of Mount Erciyes. The documentation criteria and working principles of the teams were based on a common approach, but they were adapted to suit the two individual study areas. The primary investigator unified the various works under a general umbrella. Severe climate conditions delayed completion of the project. Our work began in June 2007 and could not be completed until 2009, effectively lasting about a year and a half. The project focused on all the traditional structures within the town proper. New structures (using modern construction techniques and materials) were not included in the detailed study while mosques, churches, traditional trade centers and examples of civil architecture were all respectively documented. In this framework 412 traditional buildings and 488 modern structures totalling nearly 900 were documented. Three hundred sixty of the 412 structures were studied in detail. Plan sketches were drawn, the structures were measured, digital photos were taken and GPS coordinates were taken. The remaining 52 were not studied in detail do to structural problems but they were nonetheless inventoried, photographed and their GPS coordinates were recorded. This study was supported by Erciyes University and the Talas Municipality. GİRİŞ Türkiye Bilimler Akademisi, Türkiye Kültür Sek törü (TÜBA-TÜKSEK) programı çerçevesinde yürütülen Türkiye Kültür Envanteri Projesi kap samında Kayseri İli'nin Talas İlçesi'nde Kentsel Envanter çalışması aşağıdaki ekip tarafından ger çekleştirilmiştir.

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“…One of the main restrictions to UWB techniques is that the PSD of the transmitted pulse in the band of 3.1 to 10.6 GHz should not exceed −41.3 dBm/MHz (the complete specifications are summarized as the spectral mask for UWB ). To generate pulses that meet the specified mask, different approaches, either electrical or optical, have been proposed. In the optical domain photonic schemes to generate, modify or transmit UWB pulses have been proposed and developed.…”

Section: Introductionmentioning

confidence: 99%

Photonic frequency up‐conversion of baseband pulses for IR‐UWB using optical beating and balanced coherent detection

Santos-Aguilar

Arturo

Gutiérrez‐Martínez

2016

Micro & Optical Tech Letters

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This article describes a photonic scheme that performs frequency up‐conversion of baseband pulses for potential applications on Impulse Radio‐Ultra Wideband systems. Mixing a laser modulated by a pulse with a wavelength‐tunable laser (local oscillator) and a coherent photodetection scheme we obtain high order pulses comparable with nth derivatives of a Gaussian pulse. With our approach is possible to perform the frequency translation of the baseband pulses so that UWB pulses within standardized UWB mask are obtained. Baseband components produced in the optical mixing are removed by using a balanced photodetection stage. Our scheme exploits two different microwave photonics technics (microwave generation and coherent detection) for accomplish a simple generator of high order pulses avoiding the use of complex schemes. Additionally, the scheme can be implemented with commercially available components and it is reconfigurable in a very simple way. The performance of the proposed scheme is analyzed and evaluated in this work.© 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2749–2755, 2016

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Ultra-Wideband N-Bit Digitally Tunable Pulse Generator

Cited by 15 publications

References 5 publications

Gaussian pulse approximation using standard CMOS and its application for sub‐GHz UWB impulse radio

Gaussian pulse approximation using standard CMOS and its application for sub‐GHz UWB impulse radio

Talas (Kayseri̇) Kentsel Kültür Varliklari Envanteri̇ (2007 - 2009) 1

Photonic frequency up‐conversion of baseband pulses for IR‐UWB using optical beating and balanced coherent detection

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