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Journal of Systems Engineering and Electronics

Issue 4 • Date Dec. 2004

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Displaying Results 1 - 25 of 63
  • [Front cover]

    Publication Year: 2004, Page(s): c1
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  • Copyright page

    Publication Year: 2004, Page(s): 1
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  • Contents

    Publication Year: 2004, Page(s):1 - 4
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    Freely Available from IEEE
  • Polarization changing technique in macrocosm and it's application to radar

    Publication Year: 2004, Page(s):447 - 452
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (956 KB)

    A new model of air-surveillance radar (named polarization changing in macrocosm radar: PCM radar), which makes use of the polarization changing technique in macrocosm, is presented in this paper. On basis of careful selection of representative 98 states of polarization in macrocosm, PCM radar can not only perform transmitting and receiving polarization matching for various targets, consequently ma... View full abstract»

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  • Robust gray-image face detector based on local statistical features

    Publication Year: 2004, Page(s):453 - 459
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (3621 KB)

    An efficient training framework for gray-image face detection was presented. Our system includes two stages. In the first stage, the pattern rejection theory is used for features selection. The local Haar-like wavelet features used as rejection features to reject those patterns are not faces obviously. In the second stage, the Kullback-Leibler divergence in information theory is applied to choose ... View full abstract»

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  • On UWB system performance under impulsive noise environment

    Publication Year: 2004, Page(s):460 - 466
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1433 KB)

    In this paper, the performance of UWB (ultrawide bandwidth) radio systems under impulsive noise environment (INE) is investigated. At first, the Middleton's class a model is used as a model of impulsive noise (IN), we investigate the statistical characteristics of in-phase and quadrature components of IN, and it is proved that unlike Gaussian noise (GN), they are dependent especially to IN with sm... View full abstract»

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  • Delay performance of the CFDAMA-RPR protocol via satellite

    Publication Year: 2004, Page(s):467 - 471
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (900 KB)

    The relative performance of the combined free/demand assignment multiple access (CFDAMA) protocol with different terminal request strategies is examined. A new scheme is proposed employing combined round robin/piggybacking request strategy (CFDAMA-RPR), which is compared with the CFDAMA-RR (employing round robin request strategy) and CFDAMA-PB (employing piggy-backing request strategy). Simulation... View full abstract»

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  • Error performance analysis of coherent DCSK chaotic digital communication systems

    Publication Year: 2004, Page(s):472 - 475
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (636 KB)

    An approach to calculating the approximate bit error rates for coherent DCSK in an AWGN channel is presented. By using logistic as the chaos generator and assuming ideal synchronization at the receiver, the BER of coherent DCSK in an AWGN channel is derived. The theoretical noise performance of coherent DCSK is again derived and is equal to that of coherent FSK. By computing and simulating, the th... View full abstract»

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  • Upper and lower bounds on PMEPR in OFDM systems and application

    Publication Year: 2004, Page(s):476 - 478
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (555 KB)

    Upper and lower bounds on peak-to-mean envelope power ratio (PMEPR) in OFDM systems are derived in this paper. The derivation results show that the upper bound on PMEPR only depends on the aperiodic autocorrelation functions of the data sequences and is quite useful for rapid elimination of sequences that have PMEPR exceeding a given threshold. According to the lower bound on PMEPR, it has a great... View full abstract»

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  • Neural fuzzy inference network approach to maneuvering target tracking

    Publication Year: 2004, Page(s):479 - 483
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (878 KB)

    In target tracking study, the fast target maneuver detecting and highly accurate tracking are very important. And it is difficult to be solved. For the radar/infrared image fused tracking system, a extend Kalman filter combines with a neural fuzzy inference network to be used in maneuvering target tracking. The features related to the target maneuver are extracted from radar, infrared measurements... View full abstract»

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  • SAR image target segmentation based on entropy maximization and morphology

    Publication Year: 2004, Page(s):484 - 487
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (998 KB)

    Entropy maximization thresholding is a simple, effective image segmentation method. The relation between the histogram entropy and the gray level of an image is analyzed. An approach, which speeds the computation of optimal threshold based on entropy maximization, is proposed. The suggested method has been applied to the synthetic aperture radar (SAR) image targets segmentation. Mathematical morph... View full abstract»

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  • Novel approach for improving signal to noise ratio of seismic images

    Publication Year: 2004, Page(s):488 - 496
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (3683 KB)

    A novel approach of digital image processing technology is applied to improve SNR of seismic images. At first, we analyze the characters of line-like texture in seismic images, and then a preprocessing method named 2 D tracing horizon filtering is designed. After that, the technology of optical flow analysis is adopted to calculate the displacement vectors of adjacent pixels between neighboring se... View full abstract»

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  • Blind separation of sources in nonlinear convolved mixture based on a novel network

    Publication Year: 2004, Page(s):497 - 501
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (910 KB)

    Blind separation of independent sources from their nonlinear convoluted mixtures is a more realistic problem than from linear ones. A solution to this problem based on the Entropy Maximization principle is presented. First we propose a novel two-layer network as the de-mixing system to separate sources in nonlinear convolved mixture. In output layer of our network we use feedback network architect... View full abstract»

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  • Exact analysis of the azimuth resolution characters of squint SAR

    Publication Year: 2004, Page(s):502 - 506
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (843 KB)

    Based on the motion of platform and the scanning rules of the squint SAR, this paper constructs an exact slant range model between a point target and APC, then presents a novel analysis method of the high resolution characters in azimuth of squint SAR. By deeply researching the length of synthetic aperture and the azimuth resolution, we give the application conditions of various formulae about the... View full abstract»

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  • Design and implementation of a clock recovery circuit for fast Ethernet applications

    Publication Year: 2004, Page(s):507 - 510
    Cited by:  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1105 KB)

    A circuit architechure to realize clock recovery for fast Ethernet applications is presented, whick includies system architecture, modified Mueller Muller algorithm for 100BASE-TX, phase detector for 100BASE-TX and multiple output charge pump PLL. The clock recovery circuit is verified by TSMC 0. 35μm 1P5M CMOS process. The results show that this clock recovery circuit exactly extracts the ... View full abstract»

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  • Signal processing technique for randomly discontinuous spectra HF radar waveforms

    Publication Year: 2004, Page(s):511 - 515
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1223 KB)

    A major problem with all high frequency (HF) radars is a relatively poor range resolution available due to many interference sources. To avoid the interferences in frequency domain and operate with wideband, the randomly discontinuous spectra (RDS) signal is employed. However, it results in high range sidelobes when matching the reflected echo, which is much more difficult for target detection. A ... View full abstract»

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  • Research of a newer spread-spectrum CDM telemetry communication system

    Publication Year: 2004, Page(s):516 - 519
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (776 KB)

    In order to reduce the multiplexing interference and enhance the information data transmission efficiency of the common spread-spectrum telemetry communication system, based on the m-sequence's parallel move equivalent sequence, one type of spread-spectrum CDM (code division multiplexing) telemetry communication system is issued. The method of anti-multiplexing interference of the system is given,... View full abstract»

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  • Signal analysis and processing for random binary phase coded pulse radar

    Publication Year: 2004, Page(s):520 - 524
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (810 KB)

    The application of the random binary phase coded signal in the CW radar system has been limited by the difficulty to isolate the transmission and reception signal. In order to make use of the random binary phase coded signal, the random binary phase coded pulse radar (RBPC-PR) system has been studied. First, the average ambiguity function (AAF) of the RBPC-PR signal has been analyzed. Then, a stat... View full abstract»

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  • Second decision-making method of the fuzzy optimal model and its application

    Publication Year: 2004, Page(s):525 - 528
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (660 KB)

    In the process of concept design offshore platforms, it is necessary to select the best from feasible alternatives through comparison and filtering. Fuzzy optimal selection in multiple stages is an useful method in engineering decisionmaking, but in some cases, it is difficult to make a distinction between the first alternative and the second. Therefore it is necessary to improve the fuzzy optimal... View full abstract»

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  • Security analysis and modification of a chaotic encryption system

    Publication Year: 2004, Page(s):529 - 532
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (667 KB)

    A type of digital chaotic encryption system was proposed in Ref. [1] which uses a class of 1-D piecewise linear (PWL) map to realize chaotic encryption and decryption system through the inverse system approach. In the general structure of encryption system, a dynamical system ∑(.) is used to connect the linear combination of n-order delay with the input terminal. In this paper we show that ... View full abstract»

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  • Characteristic polynomial assignment in F-M model II of 2-D systems

    Publication Year: 2004, Page(s):533 - 536
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (714 KB)

    The problems of characteristic polynomial assignment in Fornasini-Marchesini (F-M) model II of 2-D systems are investigated. The corresponding closed-loop systems described by F-M model II are obtained via the state feedback. Using the algebraic geometry method, the characteristic polynomial assignment in the closed-loop systems is discussed. In terms of the theory of algebraic geometry, the probl... View full abstract»

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  • Knowledge-based decision support system for tool management in flexible manufacturing system

    Publication Year: 2004, Page(s):537 - 541
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (951 KB)

    Tool management is not a single, simple activity, it is comprised of a complex set of functions, especially in a flexible manufacturing system (FMS) environment. The issues associated with tool management include tool requirement planning, tool real-time scheduling, tool crib management, tool inventory control, tool fault diagnosis, tool tracking and tool monitoring. In order to make tools flow in... View full abstract»

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  • Study on the expression of systematic Lyapunov exponent based on UPOs

    Publication Year: 2004, Page(s):542 - 545
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (680 KB)

    The natural measure of a certain area in phase space is defined firstly. On the basis of natural measure, the expression of Lyapunov exponent based on unstable periodic orbits (UPOs) of chaotic systems is deduced from theoretical aspect. Then, by means of the inherent relation between UPOs and systematic Lyapunov exponent, the transitional mechanism and route of chaotic systems from low-dimensiona... View full abstract»

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  • Research on performance of ethernet interface in network centric warfare

    Publication Year: 2004, Page(s):546 - 552
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1273 KB)

    The concept of network centric warfare (NCW) and its character, high requirement of real-time synchronization are introduced. The distributed equal-node network architecture in NCW is presented. Based on theoretical analysis on ethernet interface performance, this paper presents that forwarding latency between ethernet interface devices is a key influence factor of real-time synchronization in NCW... View full abstract»

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  • Modeling for parallel scheduling and performance evaluation of MANET using stochastic Petri nets

    Publication Year: 2004, Page(s):553 - 558
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1011 KB)

    In this paper, Petri nets technique is introduced into mobile ad hoc networks (MANET) and a packet-flow parallel scheduling scheme is presented using Stochastic Petri Nets (SPN). The flowing of tokens is used in graphics mode to characterize dynamical features of sharing a single wireless channel. Through SPN reachability analysis and isomorphic continuous time Markov process equations, some netwo... View full abstract»

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Aims & Scope

Journal of Systems Engineering and Electronics reports the latest developments and achievements in both theoretical and practical aspects of systems engineering, electronics and related research areas.

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Meet Our Editors

Editor-in-Chief
Professor Rong Shi
Journal of Systems Engineering and Electronics