Yayın tarihi için WOS İndeksli Bildiri Koleksiyonu listeleme
Toplam kayıt 405, listelenen: 21-40
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Non-data aided EM-Based channel estimation for OFDM systems with time-varying fading channels
(Kluwer Academic Publishers, 2002)In this paper, a computationally efficient algorithm is presented for maximum a posteriori (MAP) channel estimation for OFDM systems employing M-PSK modulation scheme with additive Gaussian noise, based on the Expectation ... -
Design of a broadband microwave amplifier constructed with mixed lumped and distributed elements for mobile communication
(IEEE, 2002)In this paper, we designed a broadband microwave amplifier utilizing. the "semi-analytic method to describe symmetrical lossless two-ports with two-kinds of elements", namely, distributed and lumped elements in cascade ... -
Complex and real rays in three dimensional Minkowski space
(IEEE, 2002)A new approach to the theory of complex rays is proposed. It is shown that the Minkowski space is more appropriate for describing these rays than the usual, Euclidian spaces. Some illustrative examples are represented. -
Volumetric imaging using 2D capacitive micromachined ultrasonic transducer arrays (CMUTs): Initial results
(IEEE, 2002)This paper presents the first volumetric images obtained using a 2D CMUT array with through-wafer via interconnects. An 8×16-element portion of a 32×64-element array flip-chip bonded onto a glass fanout chip was used in ... -
Subarray delta-sigma beamforming for ultrasonic imaging
(IEEE, 2002)We present a beamforming architecture based on subarray processing with non-uniform oversampling 1-bit delta-sigma (??) modulation. The subarray processing combines conventional phased array and synthetic aperture approaches ... -
Blind channel estimation for space-time coding systems with Baum-Welch algorithm
(IEEE, 2002)In recent years, space-time coding is proposed to provide significant capacity gains over the traditional communication systems in fading wireless channels. In this paper, we consider the problem of blind estimation of the ... -
EM-Based sequence estimation for wireless systems with orthogonal transmit diversity
(IEEE, 2003)In this paper, an optimum sequence estimation algorithm for wireless systems with Alamouti's two transmitter diversity in the presence of multipath fading is proposed. The algorithm is based on a jointly iterative channel ... -
Design and simulation of miniaturized communication systems employing symmetrical lossless two-ports constructed with two kinds of elements
(IEEE, 2003)In this paper, a semi-analytic method is presented to describe symmetrical lossless networks with two-kinds of elements, namely, distributed and lumped elements in cascade connection. in terms of the independently chosen ... -
Microwave amplifier design for mobile communication via immittance data modelling
(IEEE, 2003)In this paper, a practical broadband microwave amplifier design algorithm based on immittance data modelling is presented. In the course of design, first, the optimum input and output terminations for the active device are ... -
A parametric approach to describe distributed two-ports with lumped discontinuities for the design of broadband MMIC's
(IEEE, 2003)This paper addreses the use of mixed lumped and distributed elements in the matching equalizers of broadband microwave communication subsytems in MMIC realizations. Construction of two-variable scattering functions for ... -
New criteria for the existence of stable equilibrium points in nonsymmetric cellular neural networks
(IEEE, 2003)A new criteria for the existence of stable equilibrium points in nonsymmetric cellular neural networks (CNN) was presented. It was shown that the results obtained can be used to derive some complete stability conditions ... -
A function of direction in a Weyl subspace associated with a set of orthogonal vector fields
(World Scientific Publ Co Pte Ltd, 2003)Let W-m be an m-dimensional subspace of an n-dimensional Weyl space W-n. Suppose that (1)v, (2)v,..., (m)v are mutually orthogonal smooth vector fields in W-m and that v is a non-tangential smooth vector field defined on ... -
Real-time range sensing with a Scheimpflug camera and a single custom sensor/processor chip
(SPIE-Int Soc Optical Engineering, 2003)An image-based range sensing technique is presented. The technique is originally considered for highway collision avoidance applications but its generality makes it suitable for application in robotics, manufacturing and ... -
Phased subarray imaging for low-cost, wideband coherent array imaging
(IEEE, 2003)The front-end hardware complexity of conventional full phased array (FPA) imaging is proportional to the number of array elements. Phased subarray (PSA) imaging has been proposed as a method of reducing the hardware ... -
A novel representation method for electromyogram (EMG) signal with predefined signature and envelope functional bank
(IEEE, 2004)In this paper, a new method to model EMG signals by means of "Predefined Signature and Envelope Functional Banks (PSEB)" is presented. Since EMG signals present quasi-stationary behavior, any EMG signal Xi is modeled by ... -
A new software tool to model measured RF-data with optimum circuit topology
(IEEE, 2004)In this paper a new S/W tool is presented to model measured RF data employing immitance interpolation techniques. This S/W tool also employs a recently developed sub-routine, which generates circuit models with least number ... -
Breakdown of the Stokes-Einstein relation in supercooled liquids
(Trans Tech Publications Ltd, 2004)Breakdown of the Einstein-Stokes relation in undercooled liquids is one of the unsolved problems in the theory of liquids. The self-diffusion coefficient follows the temperature dependence of the Einstein-Stokes equation ... -
Error propagation through generalized high dimensional model representation for data partitioning
(Wiley-V C H Verlag GMBH, 2004)In many circumstances the explicit form of a multivariate function is not known; rather a finite number of data is listed from some physical experiments. In such cases a function can be constructed only by imposing some ... -
Vektör uzayında sıradüzensel ağaç yapısı ile düzenlenmiş metin veri tabanlarının çoklu yollar üzerinden sorgulanması
(IEEE, 2004)Web sayfaları, makaleler, kitap veya dergi isimlerinden oluşan büyük doküman yığınları üzerinde sorgulama yaparken dokümanları vektörlere ve doküman topluluklarını matrislere indirgemek sorgulamaları çok daha hızlandırır ... -
A novel method to represent the speech signals by using language and speaker independent predefined functions sets
(IEEE, 2004)In this paper a new modeling method of speech signals is introduced. The proposed method is based on the generation of the so-called Predefined Signature S={s(R)(t)} and Envelope Function E = {e(K)(t)} Sets (PSEFS). These ...
