Browsing by Keywords "Simulation result"
Now showing items 120 of 21

Accurate resonant frequency computation of multisegment rectangular dielectric resonator antennas
(Taylor & Francis, 2010)In this study, multisegment dielectric resonator antenna (MSDRA) is analyzed. A new formulation depending on the Weighted Average Model (WAM) is proposed for the determination of resonant frequency which is called as ... 
A Bayesian approach to respiration rate estimation via pulsebased ultrawideband signals
(2009)In this paper, theoretical limits on estimation of respiration rates via pulsebased ultrawideband (UWB) signals are studied in the presence of prior information about respiration related signal parameters. First, a ... 
Boundary control of some infinite dimensional systems
(IFAC Elsevier, 2005)We will consider the feedback stabilization of a class of infinite dimensional systems by using boundary control, i.e. control inputs are applied at the boundaries of such systems. Such systems usually possess an internal ... 
Compressed sensing on ambiguity function domain for high resolution detection
(2010)In this paper, by using compressed sensing techniques, a new approach to achieve robust high resolution detection in sparse multipath channels is presented. Currently used sparse reconstruction techniques are not immediately ... 
Costaware strategies for query result caching in Web search engines
(Association for Computing Machinery, 2011)Search engines and largescale IR systems need to cache query results for efficiency and scalability purposes. Static and dynamic caching techniques (as well as their combinations) are employed to effectively cache query ... 
Effects of additional independent noise in binary composite hypothesistesting problems
(2009)Performance of some suboptimal detectors can be improved by adding independent noise to their observations. In this paper, the effects of adding independent noise to observations of a detector are investigated for binary ... 
Electric field dependence of radiative recombination lifetimes in polar InGaN/GaN quantum heterostructures
(2009)We report on external electric field dependence of recombination lifetimes in polar InGaN/GaN quantum heterostructures. In our study, we apply external electric fields one order of magnitude less than and in opposite ... 
Enhanced position estimation via node cooperation
(2010)Twoway timeofarrival (TWToA) is a widely used ranging protocol that can provide the distance between two devices without time synchronization. One drawback of the TWToA is poor positioning accuracy in the absence of ... 
Hybrid TWTOA/TDOA positioning algorithms for cooperative wireless networks
(2011)The problem of positioning an unknown target is studied for a cooperative wireless sensor network using hybrid twoway timeofarrival and timedifferenceofarrival measurements. A maximum likelihood estimator (MLE) can ... 
Incorporating doppler velocity measurement for track initiation and maintenance
(2006)Performance of multiple target tracking algorithms in complex environments heavily relies on the success of track initiation and measurementtotrack association algorithms. Doppler velocity measurement is the major ... 
A new delayed feedback control scheme for discrete time chaotic systems
(2009)In this paper we consider the stabilization problem of unstable periodic orbits of discrete time chaotic systems. We consider both one dimensional and higher dimensional cases. We propose a novel generalization of the ... 
A new periodic controller for discrete time chaotic systems
(World Scientific Publishing Co. Pte. Ltd., 2010)In this paper we consider the stabilization problem of unstable periodic orbits of discrete time chaotic systems. For simplicity we consider only one dimensional case. We propose a novel periodic feedback controller law ... 
Particle swarm optimization based channel identification in crossambiguity domain
(2010)In this paper, a new array signal processing technique by using particle swarm optimization (PSO) is proposed to identify multipath channel parameters. The proposed technique provides estimates to the channel parameters ... 
Positioning algorithms for cooperative networks in the presence of an unknown turnaround time
(2011)This paper addresses the problem of single node positioning in cooperative network using hybrid twoway timeofarrival and timedifferenceofarrival where, the turnaround time at the target node is unknown. Considering ... 
Powersourceaware backbone routing in wireless sensor networks
(2010)Due to the limited energysource and mostly unattended nature of the wireless sensor networks, efficient use of energy has a critical importance on the lifetime of the applications accomplished by such networks. Although ... 
Spatiotemporal interpolation of ionospheric TEC data
(2011)GPS signals are crucial, because they are used to estimate the electron density in the ionosphere. However, sometimes GPS receivers can not receive signals. In order to estimate ionospheric electron density during this ... 
Stability results for some periodic feedback controllers
(2005)We propose two periodic feedback schemes for the stabilization of periodic orbits for one dimensional discrete time chaotic systems. These schemes can be generalized to higher dimensional systems in a straightforward way. ... 
Synthesis of threedimensional light fields with binary spatial light modulators
(Optical Society America, 20110524)Computation of a binary spatial light modulator (SLM) pattern that generates a desired light field is a challenging quantization problem for which several algorithms have been proposed, mainly for farfield or Fourier plane ... 
Target detection in SAR images using codifference and directional filters
(2010)Target detection in SAR images using region covariance (RC) and codifference methods is shown to be accurate despite the high computational cost. The proposed method uses directional filters in order to decrease the search ... 
Time delay estimation in cognitive radio systems
(2009)In cognitive radio systems, secondary users can utilize multiple dispersed bands that are not used by primary users. In this paper, time delay estimation of signals that occupy multiple dispersed bands is studied. First, ...