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Electro/Information Technology Conference, 2004. EIT 2004. IEEE

Date 26-27 Aug. 2004

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Displaying Results 1 - 25 of 48
  • 2004 IEEE Electro/Information Technology Conference (EIT)

    Publication Year: 2004 , Page(s): i
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  • [Copyright notice]

    Publication Year: 2004 , Page(s): ii
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  • Table of contents

    Publication Year: 2004 , Page(s): iii - v
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  • [Blank page]

    Publication Year: 2004 , Page(s): vi
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  • Diagonalizer for correlated or unbalanced diversity branches in Rayleigh or Rician fading channels and wireless communication

    Publication Year: 2004 , Page(s): 1 - 6
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1108 KB) |  | HTML iconHTML  

    Due to the increasing interest in mobile/wireless communication, there has been a continuous research in antenna diversity to combat fading. And the model of correlated and unbalanced diversity branches reflects the real-world scenario. The diagonalizer is introduced here before the diversity branches are combined, which can transform the correlated and balanced branches to the uncorrelated and unbalanced ones, and vice versa. Also, the diagonalizer can be used to implement the optimum combining which is a quadratic combining for the correlated diversity branches. This paper assumes a generic case, in which noise and interference components are correlated with a correlation equal to or smaller than the correlation of signal components. Discussions on how to maximize diversity gains are made in various signal and noise conditions, and with different combining methods. The application of the technology presented in this paper is especially effective when the noise components have the same correlation as the signal components. This is the cases when interferences which come along with the desired signal are the main source of noise, such as the cases in CDMA systems and wireless networks, etc. The method described in this paper can act like a "filter" - to totally filter out the correlation among diversity branches in these cases. View full abstract»

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  • Improved link establishment for HF modems

    Publication Year: 2004 , Page(s): 7 - 14
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1598 KB) |  | HTML iconHTML  

    Single tone, low baud rate modems are used in communications over shortwave radio channels. A modified Goertzel algorithm that rapidly acquires signal parameters under adverse conditions is used. By applying frame excision, a single tone modem that is more tolerant to intersymbol interference and frame synchronization errors may be designed. View full abstract»

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  • A Minimum Phase Space Distance method for the demodulation of M-ary chaotic parameter modulation

    Publication Year: 2004 , Page(s): 15 - 19
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1504 KB) |  | HTML iconHTML  

    An M-ary modulation scheme for chaotic spread spectrum communication is proposed by employing a generalized tent map to modulate binary messages. Binary bit streams are represented by noise-like and broadband chaotic sequences generated from a generalized tent map with different parameter sets. Due to the broad parameter range that can drive this kind of generalized tent map to chaotic behavior, multiple bits can be represented by one chaotic sequence with a specific parameter set. The original binary message is recovered by a minimum phase space distance (MPSD) algorithm to determine the parameters of the received noise contaminated chaotic sequence, thus extract the binary message by matching the parameter sets with the corresponding binary bit stream. View full abstract»

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  • Chaotic-Pulse-Position Modulation: A third party intrusion scheme using Kalman Filter

    Publication Year: 2004 , Page(s): 20 - 25
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2098 KB) |  | HTML iconHTML  

    In this paper, we focus on the security issue of a chaotic digital communication scheme called chaotic-pulse- position modulation. We design a third party intrusion scheme to test to see if CPPM is as secure as is claimed. Experiments are conducted with various chaotic maps, where CPPM is used to modulate the message at the transmitter and a Kalman filter fed with a polynomial approximation is used at the receive. It is, shown that we can recover the original message without knowing the initial state or the chaotic map used at the transmitter. The bit error rate performances under different signal to noise ratios are evaluated to show the feasibility of this task. Furthermore, we use a bank of Kalman filters, each having polynomial models of various degrees, to estimate the degree of the chaotic map used at the transmitter. Successful results are reported. View full abstract»

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  • Frame-based iterative channel estimation using data symbols of space-time block codes

    Publication Year: 2004 , Page(s): 26 - 32
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2172 KB) |  | HTML iconHTML  

    In this paper, a novel approach using frame-based iterative channel fading parameters estimation technique from the received data sequence exploiting orthogonal property of the space-time block (STB) code is proposed. For practical implementation of STB code, the receiver requires to estimate these parameters. Regarding this type of estimation, the inherent orthogonal nature of STB code can be exploited to simplify multiple-input-multiple-output (MIMO) channel estimation technique. While modified decision-directed iterative channel estimation updates estimated parameters throughout the frame, proposed frame-based iterative channel estimation technique updates estimated channel parameters once in each iteration after decoding the whole frame. This modification reduces the effect of incorrect detection significantly. Simulation results show about 1 dB gain of bit error rate over the state-of-the-art method. The proposed scheme uses few pilot symbols to provide near perfect lower-bound performance at the cost of increased receiver complexity. View full abstract»

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  • Error correction coding for a serial digital multi-gigabit communication system

    Publication Year: 2004 , Page(s): 33 - 41
    Cited by:  Papers (2)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1735 KB) |  | HTML iconHTML  

    This paper presents the analysis used in choosing and designing an error correction coding (ECC) scheme for a wired serial digital multi-gigabit communication system. Background information is provided on multi-gigabit systems, followed by a detailed analysis leading to an ECC design. The analysis consists of determining the transmission channel bandwidth, identifying the significant noise sources, using estimates of Eb/N0 to determine channel capacity, establishing the relevant characteristics of the source data, and determining for specified random and deterministic jitter levels the probability of a bit error vs. the sampling time point. These analyses are used to develop ECC requirements for the selection and design of the code. A two-error correcting BCH code is selected and specified. The target for implementation of the ECC design is an Altera Stratix GX Field programmable gate array (FPGA). This family of FPGAs contains embedded serial transceivers that can operate at up to 3.125 Gbps. The ECC design in this paper included consideration of the capabilities of an FPGA implementation. View full abstract»

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  • Real-time communication for motorists using ad hoc network

    Publication Year: 2004 , Page(s): 42 - 47
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1588 KB) |  | HTML iconHTML  

    Traffic congestion on major roadways costs our nation billions of dollars in lost earnings, wasted fuel consumption, injury and loss of human life. Providing motorists with real time roadway conditions is essential to mitigating traffic congestion. We propose a novel real-time messaging system that can be used to communicate imminent traffic conditions to motorists. Having such information can allow motorists to alter their routes or increase awareness of potential hazardous or changing driving conditions. Our system uses ad-hoc wireless networking and personal data assistance devices. View full abstract»

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  • Lossless wavelet compression for telemammography

    Publication Year: 2004 , Page(s): 48 - 52
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1900 KB) |  | HTML iconHTML  

    Transmission of mammographic images in real time and of sufficient accuracy to render accurate diagnosis is under demand. This requires efficient lossless image compression schemes. Image compression has been a major research area for the past few decades despite the massive growth in data storage and transmission speeds. Moreover, wavelets have become the cutting edge techniques in image compression. Thus the work presented in this paper is to address some of the questions. Several types of wavelets are utilized to identify the best wavelet to deliver a lossless compression scheme for mammographic images. Compression results for different mammograms are presented. View full abstract»

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  • Harmonic analysis

    Publication Year: 2004 , Page(s): 53 - 58
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2105 KB) |  | HTML iconHTML  

    This paper describes a method of calculating the transforms, currently obtained via Fourier and reverse Fourier transforms. The method allows calculating efficiently the transforms of a signal having an arbitrary dimension of the digital representation by reducing the transform to a vector-to-circulant matrix multiplying. There is a connection between harmonic equations in rectangular and polar coordinate systems. The connection established here and used to create a very robust recursive algorithm for a conformal mapping calculation. There is also suggested a new ratio (and an efficient way of computing it) of two oscillative signal. View full abstract»

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  • Imaging of electromagnetic waves for bridge deck evaluation

    Publication Year: 2004 , Page(s): 59 - 61
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (708 KB) |  | HTML iconHTML  

    Visual inspection is the commonly used method for bridge deck inspection. However, this method depends on the intuition of the inspector and his experience. The deteriorated condition of the nation's infrastructure requires better techniques for evaluation. Nondestructive evaluation can verify the integrity of a structure or any of its components without compromising its ability to perform in service. Several nondestructive techniques are implemented on concrete bridge decks evaluation. However, ground penetrating radar (GPR) is one of the promising methods in this area. Radar scans are collected and transferred into images where information about the subsurface can be extracted. This paper discusses the basis of GPR along with the advantages and disadvantages of the method. In addition, a case study of a bridge deck with asphalt overlay will be presented. View full abstract»

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  • A novel chaotic watermarking scheme for MP3 audio signals

    Publication Year: 2004 , Page(s): 62 - 65
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (587 KB) |  | HTML iconHTML  

    This paper proposes a novel chaotic watermarking scheme for MP3 encoded audio signals. MP3 standard encodes audio signals in frequency domain and performs audio compression task by employing the psychoacoustic model of the audio signals. Spread spectrum chaotic signal that represents the copyright of the audio is embedded in the audio signal in the process of conducting MP3 encoding in which psychoacoustic model is used to control the perceptual distortion caused by both MP3 compression and chaotic watermarking. View full abstract»

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  • A versatile Q-band electron paramagnetic resonance spectrometer

    Publication Year: 2004 , Page(s): 66 - 81
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2276 KB) |  | HTML iconHTML  

    The design, construction, and operation of a Q-band (34.5-35.5 GHz) electron paramagnetic resonance (EPR) spectrometer system that is versatile to accommodate several sample irradiation and signal detection configurations is described. The spectrometer system that was developed includes a microwave bridge, synthesizer array, receiver, and signal processing unit. The main feature of the microwave bridge is the use of frequency translation technology to translate the fundamental microwave frequency, nominally 33 GHz, to spectrally pure multiple time-locked closely-spaced frequencies, nominally centered about 35 GHz, from an array of time-locked microwave synthesizers. A spectral purity of all incident spurious products < -65 dBc has been achieved. The design strategies to this end are described. The main features of the receiver are low-noise, low intermodulation products, and synchronous down- conversion to a nominal 1 GHz first intermediate frequency (IF). This first IF can then be downconverted either to baseband or to a nominal second IF of 12.8 MHz. The noise figure from the sample port of the circulator to the output of the IF preamplifier is approximately 7.5 dB. The main feature of the signal processing is direct analog-to-digital (A/D) conversion of the 12.8 MHz IF using a time-locked sub-sampling (TLSS) approach for subsequent analysis on a computer. EPR information at multiple microwave frequencies of interest can now be collected in a single sweep of the DC magnetic field. The automatic frequency control (AFC) system in both single-frequency and multiple-frequency environments is described. View full abstract»

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  • Evolving stability in bipedal robotic systems

    Publication Year: 2004 , Page(s): 82 - 91
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2882 KB) |  | HTML iconHTML  

    In order for a bipedal robotic system to interact with its environment it must be able to have stability. And because an environment can be composed of different types of terrain and surfaces, adaptation must be part of system behavior. Many current bipedal systems (e.g. Honda's P3 and Asimo or Sony's) utilize high torque custom designed servos and/or control systems to handle specific terrain (flat surfaces). What remains to be seen is how well these bipedal systems respond to terrain that isn't well defined. A robust stable system will be free of behavior that could cause damage to the system such as can occur in a fall. This thesis proposal proposes this. In order to have a completely stable system, a biped robot must be able to adapt to its environments terrain in real time and have the ability to employ corrective behavior in the event of an occurrence of instability. View full abstract»

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  • Multi-output passive digital filters

    Publication Year: 2004 , Page(s): 92 - 95
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (306 KB) |  | HTML iconHTML  

    In this paper, an overview of some of our previous work on multi-output passive digital filters and a family of four multi-output passive and stable 2nd-order digital filters derived from passive digital 2-ports are presented. The coefficients of each of these four filters can be computed by direct mapping with the coefficients of a bilinear transformed digital transfer function, derived according to a given set of filter specifications from an analog filter handbook. Under finite wordlength arithmetic operations, each of these digital filters is free from zero-input oscillation and constant-input oscillation by applying magnitude truncation at each of the two outputs of its constituent digital 2-ports. View full abstract»

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  • A unit test architecture that traces variables of JavaScript programming

    Publication Year: 2004 , Page(s): 96 - 100
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1636 KB) |  | HTML iconHTML  

    We introduce an architecture for unit tests that traces the values of output variables of JavaScript programming. We present an object model that describes the relationships between tracing and other programming components. We also present six types of tracing statements, implementation and automation approach. We created examples of XHTML and JavaScript programming to illustrate the implementation of the architecture. View full abstract»

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  • A maintenance information system for rural municipalities

    Publication Year: 2004 , Page(s): 101 - 103
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1186 KB) |  | HTML iconHTML  

    Maintenance management is an orderly and systematic approach to planning, organizing, monitoring and evaluating maintenance activities and their costs. The decaying conditions of rural roads are often attributed to the absence of a formal maintenance system and lack of resources. However, rural municipalities are constantly looking for ways to reduce cost and increase productivity in maintaining their infrastructure. In this paper, a rural maintenance information system will be presented. The proposed system was developed to facilitate the maintenance process for rural road public works using modern database management systems. View full abstract»

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  • Methods of reverse engineering and data transformation in determining the multiplicities of associations in object-oriented modeling for database applications

    Publication Year: 2004 , Page(s): 104 - 107
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (911 KB) |  | HTML iconHTML  

    We present an approach of using methods of database reverse engineering and data transformation in determining the multiplicities of associations in object-oriented analysis and modeling (OOAM). OOAM methodology is being used more and more in the development for IT applications of larger sizes. Creating correct object models is becoming important for ensuring that the design for the application is sound. Determining multiplicities of associations among object classes is a key part of creating the object model. The proposed approach is useful for information technology (IT) projects that migrate or integrate old database applications to new database applications. Many IT projects of large scale nowadays are of this type, because companies want to preserve as much as possible the capitals that they invested for old database applications. Many IT projects of large scale more or less involve with migrating or integrating some old database applications. View full abstract»

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  • Software infrastructure for prototyping evolving manufacturing control architecture

    Publication Year: 2004 , Page(s): 108 - 114
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2293 KB) |  | HTML iconHTML  

    Control architectures for manufacturing span a broad range of categories from hierarchical at one extreme to purely hierarchical on the other. Such range covers broad spectrum of solutions, from quasi-hierarchical structures to self-organizing systems. This paper describes an agent-based framework that provides the tools and components for implementing a self-organizing system which blends the advantages of hierarchical and hierarchical architectures. Typical components include, for example, a generic agent for encapsulation of machine-level control, a configurable decision process for the agents, hierarchical or hierarchical control frameworks. Use of these predefined components enables rapid prototyping and instantiation of system-level control. View full abstract»

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  • A model based data normalization technique for improving performance of engine misfire detection algorithms

    Publication Year: 2004 , Page(s): 115 - 124
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1981 KB) |  | HTML iconHTML  

    An engine misfire detection scheme must work accurately under different engine operating conditions and in presence of different kinds of engine misfire patterns. To address these issues, a model based data normalization technique capable of improving the performance of engine misfire detection algorithms is proposed in this paper. Results obtained from a six cylinder engine speed data indicate that the proposed technique works very well. View full abstract»

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  • User Interface and application development experience on handheld devices

    Publication Year: 2004 , Page(s): 125 - 137
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3829 KB) |  | HTML iconHTML  

    Today, handheld devices play an important role in human's life. Pocket PCs, Palms and Mobile devices are good examples of handhelds; one of the main concerns when we use these devices is how the interface in these devices works and what characteristics are important in creating a good User Interface. This paper describes a brief study on needs for a User Interface in handheld devices and then we will compare and explores the needs for creating the most efficient User Interface in these devices. Different factors such as application, platform and device in the context of .NET Compact Framework and J2ME were described for developing a good interface in this paper. .NET Compact Framework and J2ME are platforms for development of applications for smart devices. Here we overview these two leading platforms for smart device development. We discuss and do a comparative analysis of these two technologies by means of developing a 'Math Tutoring Game' in both the environments. View full abstract»

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  • Linear structure modeling and PCA algorithm for bridge crack detection

    Publication Year: 2004 , Page(s): 138 - 142
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1855 KB) |  | HTML iconHTML  

    An algorithm to detect cracks in concrete bridges for the purpose of automating inspection of concrete bridges is presented. The algorithm combines linear structure modeling with principal component analysis (PCA) to detect cracks in images using a training set. PCA is a classical technique in feature detection; however, to improve the results of such algorithm the linear modeling is prior to PCA. Experimental results using real bridge images are presented. View full abstract»

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