Department of Electrical and Electronics Engineering
Recent Submissions
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Characterization of sleep spindles using higher order statistics and spectra
(IEEE, 2000-08)This work characterizes the dynamics of sleep spindles, observed in electroencephalogram (EEG) recorded from humans during sleep, using both time and frequency domain methods which depend on higher order statistics and ... -
Convolution, filtering, and multiplexing in fractional Fourier domains and their relation to chirp and wavelet transforms
(, 1994)A concise introduction to the concept of fractional Fourier transforms is followed by a discussion of their relation to chirp and wavelet transforms. The notion of fractional Fourier domains is developed in conjunction ... -
Single-crystal sum-frequency-generating optical parametric oscillator
(Optical Society of America, 1999)We report a synchronously pumped optical parametric oscillator that generates the sum frequency of the pump and the signal wavelengths. A single KTiOPO4 (KTP) crystal is used for both parametric generation and sum-frequency ... -
Limit to bit rate capacity of electrical interconnects from aspect ratio of system architecture
(Elsevier, 1997-02-25)We show that there is a limit to the total number of bits per second, B, of information that can flow in a simple digital electrical interconnection that is set only by the ratio of the length l of the interconnection ... -
Cross-Term-Free Time-Frequency Distribution Reconstruction via Lifted Projections
(Institute of Electrical and Electronics Engineers, 2015-01)A crucial aspect of time-frequency (TF) analysis is the identification of separate components in a multicomponent signal. The Wigner-Ville distribution is the classical tool for representing such signals, but it suffers ... -
Gibbs random field model based weight selection for the 2-D adaptive weighted median filter
(Institute of Electrical and Electronics Engineers, 1994)A generalized filtering method based on the minimization of the energy of the Gibbs model is described. The well-known linear and median filters are all special cases of this method. It is shown that, with the selection ... -
On the Design of AQM Supporting TCP Flows Using Robust Control Theory
(Institute of Electrical and Electronics Engineers, 2004)Recently it has been shown that the active queue management schemes implemented in the routers of communication networks supporting transmission control protocol (TCP) flows can be modeled as a feedback control system. ... -
Enhanced transmission of electromagnetic waves through split-ring resonator-shaped apertures
(Society of Photo-Optical Instrumentation Engineers (SPIE), 2011-06-21)The design of aperture shape is a promising approach for enhanced transmission through a subwavelength aperture. We designed split-ring-resonator (SRR)-shaped apertures in order to increase the transmission through ... -
InSb high-speed photodetectors grown on GaAs substrate
(American Institute of Physics, 2003)We report InSb-based high-speed photodetectors grown on GaAs substrate. The p-i-n type photodetectors can operate at room temperature. Room-temperature dark current was 4 mA at 1 V reverse bias, and the differential ... -
MPLS Automatic Bandwidth Allocation via Adaptive Hysteresis
(Elsevier, 2011-04-01)MPLS automatic bandwidth allocation (or provisioning) refers to the process of dynamically updating the bandwidth allocation of a label switched path on the basis of actual aggregate traffic demand on this path. Since ... -
Capacity Bounds and Concatenated Codes Over Segmented Deletion Channels
(IEEE, 2013-03)We develop an information theoretic characterization and a practical coding approach for segmented deletion channels. Compared to channels with independent and identically distributed (i.i.d.) deletions, where each bit ... -
Digital computation of linear canonical transforms
(IEEE, 2008-06)We deal with the problem of efficient and accurate digital computation of the samples of the linear canonical transform (LCT) of a function, from the samples of the original function. Two approaches are presented and ... -
On a parameter estimation method for Gibbs-Markov random fields
(IEEE, 1994-04)This correspondence is about a Gibbs-Markov random field (GMRF) parameter estimation technique proposed by Derin and Elliott. We will refer to this technique as the histogramming (H) method. First, the relation of the ... -
Nanometer-scale patterning and individual current-controlled lithography using multiple scanning probes
(American Institute of Physics., 1999-03-19)Scanning probe lithography(SPL) is capable of sub-30-nm-patterning resolution and nanometer-scale alignment registration, suggesting it might provide a solution to the semiconductor industry’s lithography challenges. ... -
Biquadratic transconductance switched capacitor filters
(IEEE, 1993-04)Switched-capacitor (SC) filters yield efficient implementations in integrated form. However, they employ op-amps, each of which must be designed for a given filter separately. Furthermore, SC filters are not tunable. This ... -
On the design of dynamic associative neural memories
(, 1994)We consider the design problem for a class of discrete-time and continuous-time neural networks. We obtain a characterization of all connection weights that store a given set of vectors into the network; that is, each ... -
Comparative analysis of different approaches to target differentiation and localization with sonar
(Elsevier, 2003-05)This study compares the performances of di erent methods for the di erentiation and localization of commonly encountered features in indoor environments. Di erentiation of such features is of interest for intelligent ... -
Design and Optimization of High-Speed Resonant Cavity Enhanced Schottky Photodiodes
(IEEE, 1999-02)Resonant cavity enhanced (RCE) photodiodes (PD’s) are promising candidates for applications in optical communications and interconnects where high-speed high-efficiency photodetection is desirable. In RCE structures, ... -
The effect of GaN thickness inserted between two AIN layers on the transport properties of a lattice matched AllnN/AIN/GaN/AIN/GaN double channel heterostructure
(Elsevier, 2014-01-31)One AlInN/AlN/GaN single channel heterostructure sample and four AlInN/AlN/GaN/AlN/GaN double channel heterostructure samples with different values of the second GaN layer were studied. The interface profiles, crystalline ... -
Optically Implemented Broadband Blueshift Switch in the Terahertz Regime
(American Physical Society, 2011)We experimentally demonstrate, for the first time, an optically implemented blueshift tunable metamaterial in the terahertz (THz) regime. The design implies two potential resonance states, and the photoconductive semiconductor ...
