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Signal Processing and Communications Applications Conference, 2004. Proceedings of the IEEE 12th

Date 28-30 April 2004

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Displaying Results 1 - 25 of 213
  • Multisensor fusion for compiling battlespace tactical picture

    Publication Year: 2004, Page(s):751 - 754
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (334 KB) | HTML iconHTML

    The paper presents a modeling and simulation approach for a multisensor data fusion system to obtain a common tactical picture in defence surveillance applications. We explore an architecture for building a more accurate tactical picture. In addition, it combines evidence to determine platform position, velocity and identity parameters. One of the advantages of our method is its ability to combine... View full abstract»

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  • Jamming of GPS receivers

    Publication Year: 2004, Page(s):747 - 750
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (355 KB) | HTML iconHTML

    GPS is a radio navigation system that provides accurate navigation signals to any place on Earth. Although GPS was originally designed for military applications, GPS has also been used in many civilian applications. The reliability of GPS receivers and the availability of GPS signals have become crucial in the fast-growing use of GPS in military and civilian applications. GPS is designed as a spre... View full abstract»

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  • Automated inspection of textile defects using independent component analysis

    Publication Year: 2004, Page(s):743 - 746
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (467 KB) | HTML iconHTML

    The paper addresses a new defect detection method that uses independent component analysis (ICA) for locating and also partially identifying defects in textile fabric images. The method is based on obtaining ICA basis vectors for a large number of textile images obtained from the same fabric. Feature vectors are computed for the test images and these are compared with the true feature vector prede... View full abstract»

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  • Detection of sea targets from thermal images

    Publication Year: 2004, Page(s):672 - 675
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (359 KB) | HTML iconHTML

    The sea target detection problem from thermal (IR) images is solved by using statistical classification methods. Background modelling is achieved via principle component analysis (PCA) followed by a two-class Bayes classification step, i.e., target or sea. A wavelet-denoising block is added to the system resulting in a significant increase in the detection performance. K-means clustering is also i... View full abstract»

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  • Robust spherical clustering as mixed integer optimization problem and its gradient network solution

    Publication Year: 2004, Page(s):739 - 742
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (345 KB) | HTML iconHTML

    Support vector based spherical clustering is described as an optimization problem posed in the input space where the cluster indicators are also considered as variables. It is attempted to find the robust clustering by taking the objective function of the optimization problem as the energy function of the gradient network. The proposed method is an extension of the authors' work which formulated t... View full abstract»

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  • Dissolve detection for archive films

    Publication Year: 2004, Page(s):510 - 513
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (401 KB) | HTML iconHTML

    The paper proposes a novel pixel based method for the detection of dissolves in archive films. Initially, video frames are sub-sampled in order to reduce effects caused by zoom and visual degradations encountered in the video. Object and camera movement effects are reduced using an excessive change mask that rules out pixels that display extreme variations. Ascending, descending and constant pixel... View full abstract»

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  • Use of cooperative robots in motion estimation with scale factor

    Publication Year: 2004, Page(s):470 - 473
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (361 KB) | HTML iconHTML

    We have investigated the performance of estimating the 3D motion and structure when the scale information is obtained by utilizing the cooperative efforts of multiple robots. The method determines the relative positions of robots by tracking a specific geometric target present on each of them, and then uses the extended Kalman filter to estimate the motion and structure. We have performed several ... View full abstract»

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  • New CMOS realization of high performance differential current conveyor (DCCII) and its application as a four quadrant multiplier

    Publication Year: 2004, Page(s):367 - 370
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (279 KB) | HTML iconHTML

    A new CMOS realization of a high performance differential current conveyor is presented. The proposed high performance differential current conveyor is a good analog building block with the advantage of wide bandwidth. It can be directly used with MOS transistors operating in the ohmic region to implement the required analog functions, As an application of the proposed DCCII, a four quadrant curre... View full abstract»

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  • Buried object detection - EMI and IR sensors

    Publication Year: 2004, Page(s):668 - 671
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (373 KB) | HTML iconHTML

    Several sensors have been used to detect buried objects, such as GPR (ground penetrating radar) and EMI (electromagnetic induction) sensors. IR (infrared) and acoustic sensors are supportive sensors which are used with an EMI sensor or GPR. The paper focuses mainly on two sensors, a main EMI sensor and a support IR sensor. The EMI sensor's output signal and IR sensor's output image are determined ... View full abstract»

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  • Shape recognition with generalized beam angle statistics

    Publication Year: 2004, Page(s):735 - 738
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (358 KB) | HTML iconHTML

    We develop a new shape descriptor and matching algorithm in order to find a given template shape in an edge detected image without performing boundary extraction. The shape descriptor, based on generalized beam angle statistics (GBAS), defines the angles between the lines connecting each boundary point with the rest of the points as a random variable. Then, it assigns a feature vector to each poin... View full abstract»

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  • Analysis of 1/f characteristics of male/female voiced speech residual

    Publication Year: 2004, Page(s):216 - 219
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (347 KB) | HTML iconHTML

    In this paper, we examine the 1/f nature of voiced speech residual signal. Speech signals are generally classified as voiced or unvoiced. Voiced speech signals are considered to be generated by the vocal cords vibration signal exciting the vocal tract. In our model, the vocal tract is considered as a linear system. The excitation signal is the 1/f noise which is called the speech residual signal. ... View full abstract»

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  • A content based image retrieval system based on the fuzzy ARTMAP architecture

    Publication Year: 2004, Page(s):506 - 509
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB) | HTML iconHTML

    This study deals with designing a flexible feature space for content based image retrieval systems (CBIR). Initially, a large variety of features are extracted from the regions of the pre-segmented images. Then, the feature set of each object class is learned using the fuzzy ARTMAP architecture, by identifying the weights of each feature for each object class. In the querying phase, a trained set ... View full abstract»

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  • Polynomial expansion WCDMA receivers refined by local MMSE functionalities

    Publication Year: 2004, Page(s):387 - 390
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (332 KB) | HTML iconHTML

    UMTS-FDD mode downlink system is in practice supposed to be partially loaded due to interference limitations. In other words, some of the orthogonal codes are not used. This indicates that the system is overdetermined and there exists a noise space which can be exploited to cancel the intracell and intercell interference. However, since the scramblers that differentiate the base stations are aperi... View full abstract»

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  • Increasing the minimum Euclidean distance in combined trellis coding by using genetic algorithms

    Publication Year: 2004, Page(s):549 - 551
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (257 KB) | HTML iconHTML

    Channel coding, combined with expanded signal sets, has been shown to improve error performance over uncoded modulation (Ungerboeck, G., IEEE Trans. Information Theory, vol.IT-28, p.55-67, 1982). It was found that simple 8-state and 16-state trellis codes for symmetric MPSK modulation can achieve 6-7 dB gain over uncoded modulation without reduction in information bit rate by using genetic algorit... View full abstract»

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  • Optimal behaviour inspired fuzzy controller design for a three joint robot leg in protraction phase

    Publication Year: 2004, Page(s):466 - 469
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (365 KB) | HTML iconHTML

    A fuzzy controller design is performed for a three joint robot leg in the protraction phase. The aim is to develop a controller to carry the tip point to any given destination. The design is based on inspiration derived from the optimal behavior of the leg. The optimal trajectories are obtained by using optimization methods of "numeric gradient" and "optimal control" successively. Separate fuzzy c... View full abstract»

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  • Performance improvement via AR modeling based linear prediction for time division duplex (TDD) smart antenna systems

    Publication Year: 2004, Page(s):200 - 203
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (363 KB) | HTML iconHTML

    In time-division-duplex (TDD) mode wireless communication, downlink performance of a smart antenna system (SAS) can be degraded due to variation of spatial signatures especially in vehicular scenarios. To mitigate this, prediction based downlink beamforming can be applied, which relies on using updated weight vectors via linear prediction of spatial signatures in the downlink interval based on the... View full abstract»

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  • The realization of FTFN-based simple chaotic circuit and experimental verification of its high frequency performance

    Publication Year: 2004, Page(s):642 - 645
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (373 KB) | HTML iconHTML

    The VOA (voltage-mode operational amplifier)-based simple chaotic circuit proposed by J.C. Sprott (see Physics Letters A, vol.266, p.19-23, 2000) is realized as an FTFN (four-terminal floating or)-based circuit and its high frequency performance is investigated. The results of experimental studies show that the FTFN-based chaotic circuit exhibits better performance at high frequencies than a VOA-b... View full abstract»

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  • e_Coach

    Publication Year: 2004, Page(s):99 - 102
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (316 KB) | HTML iconHTML

    We developed the necessary software to control the playback speed of exercise videos playing on a personal computer, using the heart rate of an individual performing the recorded exercise routine. Moderate exercise, at an appropriate heart rate, is widely regarded today as an excellent way to improve one's health when performed on a regular and frequent basis. One popular form of an indoor exercis... View full abstract»

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  • Dynamic solvers for linear optimization problems

    Publication Year: 2004, Page(s):304 - 307
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (334 KB) | HTML iconHTML

    In this study, based on the classical gradient projection method of optimization theory a dynamic solver for linearly constrained linear optimization problems called the gradient projection network is introduced. To illustrate the performance of the network the result obtained for a special linear problem is compared with those obtained by Kennedy-Chua, Rodriguez-Vazquez and Zak's network. View full abstract»

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  • Prediction of protein subcellular localization based on primary sequence data

    Publication Year: 2004, Page(s):118 - 120
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (317 KB) | HTML iconHTML

    Subcellular localization is crucial for determining the functions of proteins. A system called prediction of protein subcellular localization (P2SL) that predicts the subcellular localization of proteins in eukaryotic organisms based on the amino acid content of primary sequences using amino acid order is designed. The approach for prediction is to find the most frequent motifs for each protein in... View full abstract»

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  • Motion compensated temporal filtering within the H.264 standard

    Publication Year: 2004, Page(s):363 - 366
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (343 KB) | HTML iconHTML

    We propose an adaptive motion-compensated temporal filtering (MCTF) structure to provide efficient temporal scalability within the H.264/AVC video compression standard. MCTF has traditionally been considered within fully scalable wavelet video coders. However, motion-compensated simple 5/3 lifted temporal wavelet filtering suffers at scene changes, as well as occlusion regions. We note that the bi... View full abstract»

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  • The compression of musical instrument signals by wavelet transform

    Publication Year: 2004, Page(s):493 - 495
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (263 KB) | HTML iconHTML

    The performance of the wavelet transform in the analysis, synthesis and compression of the audio signals of some musical instruments and of speech signals is investigated. Musical samples are taken from flute, bass guitar, clarinet and cello. In the analysis and the synthesis, Mallat's algorithm is used to calculate the wavelet transform. The process is repeated for all wavelet functions that can ... View full abstract»

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  • Laser radar prototype development

    Publication Year: 2004, Page(s):665 - 667
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (331 KB) | HTML iconHTML

    High power lines, pylons, towers and other obstacles endanger helicopters flying at low or ground hugging altitudes. A design and prototype development activity for a laser radar system was initiated with NATO-WEAG support in 1999. The participants are the leading defence industries and institutions of Turkey, Portugal and Italy. Principles of operation, system parameters, and integration and test... View full abstract»

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  • Image-based extraction of material reflectance properties of a 3D rigid object

    Publication Year: 2004, Page(s):245 - 248
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (390 KB) | HTML iconHTML

    In this study, an appearance reconstruction method based on extraction of material reflectance properties of a three-dimensional (3D) object from its two-dimensional (2D) images is explained. One of the main advantages of this system is that the reconstructed object can be rendered in real-time with photorealistic quality in varying illumination conditions. The reflectance of the object is decompo... View full abstract»

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  • A new point of view to common vector approach

    Publication Year: 2004, Page(s):732 - 734
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (293 KB) | HTML iconHTML

    The common vector approach is handled from a new point of view. Thus, all classes can be represented by a unique subspace and high recognition rates can be obtained by using feature vectors with very low dimensions. The recognition rates obtained from an experimental study using the TI-digit database are also given. View full abstract»

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