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TENCON 2003. Conference on Convergent Technologies for the Asia-Pacific Region

Date 15-17 Oct. 2003

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  • Convergent Technologies for the Asia-Pacific Region

    Publication Year: 2003, Page(s):vii - xliv
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1104 KB)

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  • Event based commanding

    Publication Year: 2003, Page(s):1288 - 1292 Vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB) | HTML iconHTML

    This paper presents the software system titled "event based commanding" developed for one of the ground automated mode of telecommanding operations for Indian geo-stationary satellites. Any satellite needs health monitoring, analyzing and controlling with respect to the requirement. Monitoring, analyzing and controlling is done by controller/operator as per the defined and necessary directives. As... View full abstract»

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  • Design of a fixed-rate multiple description image coder

    Publication Year: 2003, Page(s):1284 - 1287 Vol.4
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (311 KB) | HTML iconHTML

    Multiple description coding refers to encoding an information source into multiple bitstreams in a way to be able to trade oft between channel protection and decoding quality. In this paper we propose a two-description subband image coder. We use over-sampling to produce redundancy for the lowest frequency subband which has the highest visual quality, and then split the subbands samples among the ... View full abstract»

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  • A 0.1-W CMOS class-E power amplifier for Bluetooth applications

    Publication Year: 2003, Page(s):1348 - 1351 Vol.4
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (351 KB) | HTML iconHTML

    This paper describes the design of a CMOS class-E RF power amplifier for Bluetooth applications in a standard 0.35-μm CMOS technology. Simulation results using Spectre with MOS level 49 parameters show that the power amplifier can deliver 100 mW output power to 50-Ω load at 2.4 GHz with 64% drain efficiency and 59% power-added-efficiency respectively under a single supply voltage of 2.5 V... View full abstract»

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  • Robust timing synchronization for OFDM based wireless LAN system

    Publication Year: 2003, Page(s):1558 - 1561 Vol.4
    Cited by:  Papers (13)  |  Patents (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (379 KB) | HTML iconHTML

    In this paper, a robust a and efficient frame detection and symbol timing synchronization technique suitable for IEEE 802.11a wireless LAN system is proposed. The proposed method does frame detection using a threshold comparison mechanism and performs orthogonal frequency division multiplexing (OFDM) symbol boundary detection using correlation techniques. This algorithm is a novel combination of s... View full abstract»

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  • Integrated scheduling of hard real-time and multimedia tasks

    Publication Year: 2003, Page(s):1618 - 1622 Vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (513 KB) | HTML iconHTML

    In this paper, we develop a tool for carrying out acceptance tests in a multiprocessor system, for workloads that include both sporadic hard tasks with specified resource requirements, and multimedia tasks with firm (m, k) guarantees. The tool is a two-level scheduler. The higher-level server planner generates server arrangements for the multimedia server, such that it can meet the (m, k) firm gua... View full abstract»

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  • Phase-locked loop design for flexible mode tracking

    Publication Year: 2003, Page(s):1277 - 1283 Vol.4
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (646 KB) | HTML iconHTML

    This paper describes the design of PLL to track sinusoid flexible mode signals in flexible satellites. The phase detector of the PLL is associated with a low pass filter which is usually not shown in literature. Specifications of the low pass filter are developed based on the frequency of the flexible modes. Subsequently, the filter order is designed with the desired suppression at high frequency.... View full abstract»

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  • Design optimization of inverter fed 3-phase squirrel cage induction motor

    Publication Year: 2003, Page(s):1303 - 1307 Vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (459 KB) | HTML iconHTML

    Static inverter fed induction motor drive is an important competitor in the field of variable speed drives. Design optimization of a six-stepped three-phase inverter fed squirrel cage induction motor for minimum cost and maximum frequency operation is presented in this paper. Additional winding loss, core loss, stray loss and torque pulsations produced by harmonic voltages over a frequency-range t... View full abstract»

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  • A high-capacity indoor optical wireless LAN architecture

    Publication Year: 2003, Page(s):1316 - 1319 Vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (378 KB) | HTML iconHTML

    The increased use of portable computing and multimedia terminals in recent years has led to a growth in interest in the area of high-speed wireless digital links and local area networks (LANs). The requirement is for a communication medium that has high speed, low cost, low power consumption and high-level of security. Traditionally, radio frequency (RF) transmission is used in wireless applicatio... View full abstract»

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  • Object-based affine motion estimation

    Publication Year: 2003, Page(s):1343 - 1347 Vol.4
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (526 KB) | HTML iconHTML

    Motion estimation and compensation form a major part in any video coding scheme. The video coding standard adopted for multimedia applications is the MPEG-4 wherein object-based motion estimation comes into play. However, MPEG-4 uses conventional motion estimation technique that can detect only pure translational motion along the image plane and fails to consider any complex motion that arises due... View full abstract»

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  • Design of an embedded receiver for satellite-based real time voice and data messaging for efficient disaster management

    Publication Year: 2003, Page(s):1414 - 1418 Vol.4
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (410 KB) | HTML iconHTML

    Disaster management is combination of various technological, infrastructural and administrative activities and communities have already recognized the need to improve capability for adopting and using real time communication systems for the benefit of all sectors of the community specially for the purpose of dissemination of warning messages predicting impending disaster. There is no denying the f... View full abstract»

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  • ARKEPIanGraphSort: a graph based sorting algorithm

    Publication Year: 2003, Page(s):1386 - 1390 Vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (494 KB) | HTML iconHTML

    Sorting is a well-known problem frequently used in many aspects of the world of computational application. Sorting means arranging a set of records (or a list of keys) in some (increasing or decreasing) order. In this paper, we propose a graph based sorting algorithm, designated as ARKEPIanGraphSort that takes time ⊗(n2) in the worst-case, where n is the number of records in the ... View full abstract»

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  • Line harmonics reduction using neural based controller for shunt active filters

    Publication Year: 2003, Page(s):1554 - 1557 Vol.4
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (318 KB) | HTML iconHTML

    Harmonic distortion is a form of electrical noise. It is a superposition of signals, which are of multiples of fundamental frequency. Proliferation of large power electronic systems results in increased harmonic distortion. Harmonic distortion results in reduction of power quality and system stability. This paper presents neural based proportional integral (PI) control applicable for active power ... View full abstract»

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  • An adaptive fuzzy filter system for smoothing noisy images

    Publication Year: 2003, Page(s):1614 - 1617 Vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (481 KB) | HTML iconHTML

    This paper presents an adaptive fuzzy filter system that combines the outputs of several filters at any time. It is observed that each objective function associated with a filter yields differing capability in the filtering operation. Hence, all the objective functions are divided into 2 types: multiplicative type (Pi) and summation type (Sigma). In this paper, we present several filter combinatio... View full abstract»

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  • Classification of power system transients using wavelet transforms and probabilistic neural networks

    Publication Year: 2003, Page(s):1272 - 1276 Vol.4
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (387 KB) | HTML iconHTML

    Through this paper, we propose a novel method of automation of power system fault identification information, by the wavelet analysis of power system transients. We have incorporated a probabilistic neural network (PNN) for detecting the type of fault. This paper is focused on fault identification but can also be easily extended to other power system solutions such as fault location and so forth. View full abstract»

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  • Modified soft output Viterbi algorithm for truncated trellis

    Publication Year: 2003, Page(s):1535 - 1538 Vol.4
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB) | HTML iconHTML

    In concatenated codes, the performance of the outer decoder can be improved with a soft output from the inner decoder. Soft output Viterbi algorithm (SOVA) is one such technique when the inner decoder is Viterbi based. However, when the trellis does not terminate to a single final state, the outer decoder performance does not improve substantially. In this work, we propose two methods to restore t... View full abstract»

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  • Information congestion

    Publication Year: 2003, Page(s):1595 - 1599 Vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (474 KB) | HTML iconHTML

    This paper talks about information congestion in an enterprise. The various reasons for information congestion, strategies and guidelines like portals, content management systems, personalization and framework based solution to control information congestion in an enterprise. By keeping a futuristic view, this paper also demonstrates how business process modeling based on emerging standards like i... View full abstract»

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  • A neural network method for mammogram analysis based on statistical features

    Publication Year: 2003, Page(s):1489 - 1492 Vol.4
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (378 KB) | HTML iconHTML

    In this paper, we present a novel approach to the problem of computer-aided analysis of digital mammograms for breast cancer detection. The algorithm developed here classifies mammograms into normal and abnormal. First, the structures in mammograms produced by normal glandular tissue of varying density are eliminated using a wavelet transform (WT) based local average subtraction. Then the linear m... View full abstract»

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  • Performance evaluation of Brands' digital cash system in TCP/IP environment

    Publication Year: 2003, Page(s):1298 - 1302 Vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (497 KB) | HTML iconHTML

    Brands' digital cash system is a single term system that builds on two concepts, Schnorr digital signature and the representation problem in group of prime order. The Brands' scheme is almost as efficient as the fully traceable offline systems. In this paper, we evaluate the performance of Brands' system in TCP/IP Environment and report the results in various conditions. View full abstract»

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  • An analytical model for intersystem handover

    Publication Year: 2003, Page(s):1311 - 1315 Vol.4
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (466 KB) | HTML iconHTML

    Universal Mobile Telecommunication Systems (UMTS) shall be developed in such a way that it supports compatibility with an evolved Global System for Mobile Ccommunications (GSM). In this paper, we investigate intersystem handover between GSM and UMTS based on wideband code division multiple access (WCDMA) air-interface. A mathematical model is proposed to evaluate the handover performance. The hand... View full abstract»

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  • Nonlinear predictive coding for streaming video

    Publication Year: 2003, Page(s):1325 - 1328 Vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (489 KB) | HTML iconHTML

    The coding of multimedia data streams is a vital factor in how well, and to what extent a given network can support popular applications. Coding of speech and video, the two significant categories of data under consideration, currently follows the standards based on linear prediction, and MPEG respectively. The work documented in this paper is directed towards the development of an algorithm which... View full abstract»

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  • A new approach to reduce encoding time in EBCOT algorithm for JPEG2000

    Publication Year: 2003, Page(s):1338 - 1342 Vol.4
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (669 KB) | HTML iconHTML

    The JPEG2000 is a new image compression standard providing better performances over other previous standards. One of the major parts of JPEG2000 is EBCOT (embedded block coding with optimized truncation) algorithm, which is needed to encode all bitplanes of every codeblock into compressed passes, then, truncated to achieve a particular desired hit-rate by using rate-distortion optimization. Eviden... View full abstract»

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  • Performance analysis of an LMS based Fourier analyzer for sinusoidal signals with time-varying amplitude

    Publication Year: 2003, Page(s):1409 - 1413 Vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (382 KB) | HTML iconHTML

    The estimation of sinusoidal signals in additive noise finds many engineering applications. Examples are the estimation of harmonics in power systems and the pitch detection in musical transcription and so on. In this article, firstly, it is verified from numerical experiment that a least mean square (LMS) based Fourier analyzer for sinusoidal signals with time-varying amplitude can track each amp... View full abstract»

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  • Methods for classification of phonocardiogram

    Publication Year: 2003, Page(s):1514 - 1515 Vol.4
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB) | HTML iconHTML

    The emergence of cardiac surgery and with it an imperative need for precise anatomical diagnosis have revived the technical advancement necessary for the amplification and recording of cardiovascular sounds. The study of phonocardiography has developed out of this confidence. The recordings of the sounds, produced by the mechanical activity of the human heart that contains vital information are ca... View full abstract»

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  • Allpass lattice structure based second order digital IIR notch filter for removing DC and very low frequencies

    Publication Year: 2003, Page(s):1384 - 1385 Vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (255 KB) | HTML iconHTML

    In this paper, an allpass lattice structure based second order notch filter with notch at DC is designed. The filter perfectly removes the dc and the specified very low frequencies. It can be designed for a very sharp transition band thereby eliminating frequencies close to DC. The filter is simple to implement and the number of multipliers required is equal to one. For the purpose of illustration... View full abstract»

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