Search Results - "Zhang, Cemin"

Investigation of High-Accuracy Indoor 3-D Positioning Using UWB Technology by Mahfouz, M.R., Cemin Zhang, Merkl, B.C., Kuhn, M.J., Fathy, A.E.

“…There are many challenges in building an ultra-wideband (UWB) indoor local positioning system for high-accuracy applications. These challenges include reduced…”
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Real-Time Noncoherent UWB Positioning Radar With Millimeter Range Accuracy: Theory and Experiment by Cemin Zhang, Kuhn, M.J., Merkl, B.C., Fathy, A.E., Mahfouz, M.R.

“…In this paper, we propose a novel architecture for ultra-wideband (UWB) positioning systems, which combines the architectures of carrier-based UWB systems and…”
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Performance Enhancement of a Sub-Sampling Circuit for Ultra-Wideband Signal Processing by Cemin Zhang, Fathy, A.E., Mahfouz, M.

“…An ultra-wideband (UWB) sampling mixer has been developed based on utilizing the combined advantages of two known circuit topologies: a wideband balun and a…”
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A System-Level Simulation Framework for UWB Localization by Kuhn, M J, Mahfouz, M R, Zhang, C, Merkl, B C, Fathy, A E

“…In this paper we present a comprehensive simulation framework that can accurately simulate our indoor UWB positioning system including the analog front-ends,…”
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Development of an UWB Indoor 3D Positioning Radar with Millimeter Accuracy by Cemin Zhang, Kuhn, M., Merkl, B., Mahfouz, M., Fathy, A.E.

“…A high resolution ultra wideband (UWB) positioning radar system based on time difference of arrival (TDOA) has been developed. The UWB radar system provides…”
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A system level design approach to UWB localization by Kuhn, M.J., Cemin Zhang, Song Lin, Mahfouz, M.R., Fathy, A.E.

“…We have developed a novel UWB positioning system with millimeter range 3D accuracy. It is difficult to comprehensively simulate a system of this nature since…”
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Real-time noncoherent UWB positioning radar with millimeter range accuracy in a 3D indoor environment by Cemin Zhang, Kuhn, M., Fathy, A.E., Mahfouz, M.

“…In this work, we have successfully developed a stand-alone system for positioning both static and dynamic targets in an indoor environment with approximately 2…”
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Development of an ultra-wideband elliptical disc planar monopole antenna with improved omni-directional performance using a modified ground by Cemin Zhang, Fathy, A.E.

“…A planar monopole antenna has many attractive features such as a simple structure, exhibition of ultra-wideband characteristics, and a near omni-directional…”
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High accuracy UWB localization in dense indoor environments by Kuhn, M., Cemin Zhang, Merkl, B., Depeng Yang, Yazhou Wang, Mahfouz, M., Fathy, A.

“…UWB communication and localization systems have many inherent advantages for robust performance in dense, indoor multipath environments. Although UWB systems…”
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UWB antipodal vivaldi antennas with protruded dielectric rods for higher gain, symmetric patterns and minimal phase center variations by Elsherbini, A., Cemin Zhang, Song Lin, Kuhn, M., Kamel, A., Fathy, A.E., Elhennawy, H.

“…In this paper, the authors proposed a technique to improve the gain, narrow the H-plane beamwidth, and minimize the phase center variations with frequency by…”
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Development of an ultra wideband Vivaldi antenna array by Yunqiang Yang, Cemin Zhang, Song Lin, Fathy, A.E.

“…We have developed a 1/spl times/16 sub-array antenna structure for ultra wideband applications such as see-through-walls imaging radar. The utilized single…”
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Planar antipodal Vivaldi antenna array configuration for low cross-polarization and reduced mutual coupling performance by Cemin Zhang, Kuhn, M., Mahfouz, M., Fathy, A.E.

“…Investigations of various antipodal Vivaldi antenna array configurations have been carried out. Based on this study, it has been demonstrated that planar…”
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Notch bandwidth and filter order trade-offs in band-notched monopole antennas for UWB applications by Elsherbini, A., Cemin Zhang, Fathy, A.E., Mahfouz, M.

“…In this paper, we have optimized the performance of both the slot notched and compact coplanar waveguide (CRW) cell (CRCC) notched monopoles to eliminate the…”
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Investigation of pulse dispersion in a carrier-based UWB system with LO leakage cancellation: Investigation of Pulse Dispersion by Zhang, Cemin, Elsherbini, Adel, Fathy, Aly E., Mahfouz, Mohamed

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Reconfigurable Pico-Pulse Generator for UWB Applications by Zhang, C., Fathy, A.E.

“…We have designed, fabricated, and tested a low cost tunable narrow pico-pulse generator using a 60ps transition time step-recovery diode (SRD) device. Both the…”
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Low-inertial IR controlled circuits in 110- 130 GHz range based on dielectric image guides by Gigoyan, S., Melikyan, A., Wilson, J., Song Lin, Cemin Zhang, Fathy, A.E.

“…We have experimentally studied various circuit elements in the 110-130 GHz frequency band based on dielectric image lines (DIL) that are optically controlled…”
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Investigation of pulse dispersion in a carrier-based UWB system with LO leakage cancellation by Zhang, Cemin, Elsherbini, Adel, Fathy, Aly E., Mahfouz, Mohamed

“…Local oscillator (LO) leakage in a carrier‐based ultrawideband (UWB) system is a major design concern. In many cases, mixer LO‐RF isolation is not sufficient…”
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Accurate UWB indoor localization system utilizing time difference of arrival approach by Zhang, C., Kuhn, M., Merkl, B., Fathy, A.E., Mahfouz, M.

“…An accurate ultra wideband (UWB) localization approach has been developed based on time difference of arrival (TDOA). This method provides sub-cm accuracy,…”
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Real-time UWB indoor positioning system with millimeter 3-D dynamic accuracy by Kuhn, M., Zhang, C., Mahfouz, M., Fathy, A.E.

“…A real-time UWB positioning system has been developed which has dynamic 3D accuracy of better than 6 mm and static 3D accuracy of 3-4 mm. This accuracy is an…”
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Optimization of cascode CMOS low noise amplifier using inter-stage matching network by Zhang, C., Huang, D., Lou, D.

“…The traditional cascode structure of CMOS low noise amplifier (LNA) is considered as a two-stage amplifier and inter-stage matching network is introduced…”
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