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2002 IEEE International Conference on Personal Wireless Communications

15-17 Dec. 2002

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Displaying Results 1 - 25 of 72
  • 2002 IEEE International Conference on Personal Wireless Communicatons (ICPWC-2002) (Cat. No.02TH8635)

    Publication Year: 2002
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  • A computationally efficient algorithm for code decision in CCK based high data rate wireless communications

    Publication Year: 2002, Page(s):143 - 146
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (286 KB) | HTML iconHTML

    A computationally efficient algorithm for decoding an 8-chip complementary code sequence using fast Walsh transform (FWT) technique is presented. The reduction in computation is achieved by exploiting the redundant nature of a set of 4 outputs at the 3/sup rd/ stage of FWT computed from the same pair of 2/sup nd/ stage outputs, the redundancy being with respect to their squared magnitudes. The adv... View full abstract»

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  • Real-time streaming over an IEEE 802.11b based wireless LAN test bed

    Publication Year: 2002, Page(s):155 - 158
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (241 KB) | HTML iconHTML

    Wireless LAN systems based on IEEE 802.11 (see http://grouper.ieee.org/groups/802/11) have become a path-breaking innovation and have revolutionized the home, educational and office network markets (Kapp, S., IEEE Internet Computing, vol.6, no.1, p.82-5, 2002). We attempt to analyze real-time video streaming issues over a wireless LAN test bed based on such a mature technology. The creation of thi... View full abstract»

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  • Index of authors

    Publication Year: 2002, Page(s):335 - 336
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    Freely Available from IEEE
  • Distance-optimized space-time trellis codes

    Publication Year: 2002, Page(s):56 - 60
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (445 KB) | HTML iconHTML

    We propose methods for improving the performance of the space-time trellis codes for static or slow fading wireless channels. We use the 8-PSK symbol constellation with 8, 16 and 32-state trellis structure introduced by Throkh, Seshadri and Calderbank (1998), subject to the same power, bandwidth and trellis complexity for a communication system with two transmit antennas and one receive antenna. T... View full abstract»

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  • On the design of element management system for node Bs in a 3G wireless network

    Publication Year: 2002, Page(s):51 - 55
    Cited by:  Papers (2)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (441 KB) | HTML iconHTML

    The rapid growth in wireless data services has resulted in development of 3G networks. With the advent of 3G wireless networks and their deployment, a strong need of efficient management of the system has arisen. The importance of an open, scalable, flexible and efficient architecture for element management system (EMS) for these networks is now well established. This paper addresses the importanc... View full abstract»

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  • Maximum likelihood clock and carrier recovery in a direct sequence spread spectrum communication system

    Publication Year: 2002, Page(s):322 - 325
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (315 KB) | HTML iconHTML

    Clock and carrier recovery are very critical in high speed digital wireless communication for achieving high data rate with low packet error rate. In this paper, we propose a linear estimator for both clock and carrier recovery in a direct sequence spread spectrum (DSSS) communication system and show that this is also the maximum likelihood (ML) estimator. We present simulation results to illustra... View full abstract»

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  • QoS implementation in cdma2000

    Publication Year: 2002, Page(s):45 - 50
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (499 KB) | HTML iconHTML

    A key challenge for third generation mobile networks is to incorporate quality of service (QoS) to handle subscriber differentiation and provide a variety of speech, data and multimedia services. The new generation wireless networks are designed to host various applications, which include VoIP, video streaming, video conferencing, broadcast services, web browsing, e-mail, games, SMS, file transfer... View full abstract»

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  • Other cells interferences of power controlled CDMA systems

    Publication Year: 2002, Page(s):319 - 321
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (268 KB) | HTML iconHTML

    In this paper, using a simulation and modelling technique, the other cell interference factor is obtained and compared with previous upper bounds. The effect of propagation parameters on other cell interference is investigated. Two scenarios are studied, when the mobile chooses the nearest base station and when it chooses the least attenuation base station. The results indicate that that the other... View full abstract»

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  • Mobile IP in 3G CDMA networks

    Publication Year: 2002, Page(s):41 - 44
    Cited by:  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (345 KB) | HTML iconHTML

    Third generation networks are fast evolving towards all-IP. Conventional IP was designed to work in a static network and is not sufficient to handle the mobility of IP nodes across subnets. To solve this problem, IETF has proposed a solution called Mobile IP, which bridges these gaps to facilitate convergence. The paper describes our experience in integrating the Mobile IP stack with the cdma2000 ... View full abstract»

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  • Optimal power allocation for multiaccess fading channels with minimum rate guarantees

    Publication Year: 2002, Page(s):20 - 24
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (349 KB) | HTML iconHTML

    Future wireless networks will have to support multimedia services which possess inherent quality of service (QoS) requirements. A minimum rate guarantee is often an important QoS requirement. We propose dynamic power and rate allocation strategies that counter the effect of channel variations while guaranteeing a minimum rate to each user. View full abstract»

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  • Handoff protocol for Bluetooth public access

    Publication Year: 2002, Page(s):159 - 162
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    A major requirement for providing Internet connectivity to mobile handhelds is the wireless network access for handheld devices. As an alternative to the expensive 3G networks, which share 2 Mbps in several square kilometers, the use of short-range wireless technologies like Bluetooth, that shares 1 Mbps among just 7 users, has been proposed. This is much more economical, as it works in the unlice... View full abstract»

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  • An iterative method for code timing acquisition for DS-CDMA systems

    Publication Year: 2002, Page(s):314 - 318
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (342 KB) | HTML iconHTML

    A recently proposed differential correlation based acquisition technique, the differential correlator-matched filter (DC-MF) algorithm, results in greater interference suppression by using differential correlators, but is computationally complex. We propose a modification to this algorithm, which reduces the computational complexity with little loss in performance. Simulations, for a multiuser sys... View full abstract»

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  • Adaptive routing for ad hoc wireless networks providing QoS guarantees

    Publication Year: 2002, Page(s):196 - 200
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (449 KB) | HTML iconHTML

    A cluster-based route discovery and dynamic route management protocol for ad hoc networks with inaccurate information for given QoS (quality of service) requirements has been proposed and compared with existing routing protocols. The proposed scheme is much more scalable, the route discovery is faster (O(logN) against O(N), N being the number of nodes) and it also guarantees QoS - a feature which ... View full abstract»

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  • Modeling the mobile host's mobility/position as a function of time

    Publication Year: 2002, Page(s):270 - 274
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (438 KB) | HTML iconHTML

    When modeling wireless networks we require to find the distance of a mobile from the base station of the current cell, and also from base stations in some neighboring cells. This is needed for many reasons, such as to estimate cochannel interference and signal to noise ratio (SNR), and also for resource management functions. A model is proposed to find the position of the mobile host at any point ... View full abstract»

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  • EDGE: a technology assessment

    Publication Year: 2002, Page(s):35 - 40
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (489 KB) | HTML iconHTML

    EDGE is a narrowband wireless data technology evolution for GSM networks. Some GSM and TDMA operators plan to deploy EDGE as an evolution from GPRS to provide higher data rates and sector throughput. EDGE and GPRS are interim steps for these operators as they evolve to 3G technologies. The paper provides an assessment of EDGE (enhanced data rates for GSM evolution) technology in an era of increasi... View full abstract»

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  • Non-linear channel equalization using computationally efficient neuro-fuzzy channel equalizer

    Publication Year: 2002, Page(s):16 - 19
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (334 KB) | HTML iconHTML

    The paper investigates the problem of channel equalization in digital cellular radio (DCR). These channels are affected by intersymbol interference (ISI) with non-linearity in the presence of additive white Gaussian noise (AWGN). We propose a computationally efficient neuro-fuzzy system based equalizer for use in communication channels with these anomalies. This equalizer performs close to the opt... View full abstract»

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  • Development of a CDMA system with RAKE receiver for the third generation wireless communication systems

    Publication Year: 2002, Page(s):309 - 313
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (413 KB) | HTML iconHTML

    The main constituent of the third generation (3G) digital cellular mobile communication systems is a CDMA transceiver. The transmitter includes complex scrambling code generation, channelization code generation, and the spreading operation with both. The receiver involves RAKE reception, code synchronization, descrambling code and channelization code generation and the despreading operations. The ... View full abstract»

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  • A power-efficient resource allocation scheme for multiuser OFDM

    Publication Year: 2002, Page(s):224 - 228
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (443 KB) | HTML iconHTML

    We present a new power-efficient resource allocation scheme for downlink multiple access communications based on OFDM for indoor wireless systems. A theoretical bound on the minimum total transmit power at the base station while satisfying the bit-rate (BR) and bit-error rate (BER) criterion of the various portable users in the system is derived. As this cannot be realized in a simple manner, we p... View full abstract»

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  • Performance enhancement of TCP on multihop ad hoc wireless networks

    Publication Year: 2002, Page(s):90 - 94
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (527 KB) | HTML iconHTML

    It has been found that the throughput performance of TCP controlled file transfers over multi-hop wireless networks can be very poor, and the bandwidth sharing between multiple TCP transfers can be very unfair. We first report our reconfirmation of these simulation results in the context of a string topology network that uses the IEEE 802.11b medium access control protocol, and an ad hoc routing p... View full abstract»

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  • Selection diversity based ARQ schemes and their enhancements using packet combining in a slow Rayleigh fading channel

    Publication Year: 2002, Page(s):192 - 195
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (346 KB) | HTML iconHTML

    Antenna diversity is a widely studied strategy to combat fading processes in wireless systems. While packet combining may further enhance receiver diversity, this issue has not received much attention. We study ARQ schemes with or without receiver diversity. An important outcome of this work is that significant performance gain can be achieved with packet combining along with selection diversity. View full abstract»

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  • Precise location identification in cellular mobile environment

    Publication Year: 2002, Page(s):265 - 269
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (409 KB) | HTML iconHTML

    With the advent of cellular networks and the increasing number of users in this environment, the demands of different services are growing day by day. For many such services it is required to identify the exact location of a mobile user within a radius of few meters or so. We present a location management scheme to determine the exact location of the mobile user when it transmits a distress signal... View full abstract»

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  • Resource allocation in DS-CDMA with imperfect power control and correlated interference

    Publication Year: 2002, Page(s):30 - 34
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (342 KB) | HTML iconHTML

    Allocation of processing gain for data users in cellular CDMA is considered. Throughput and delay analyses of packet data services using variable spreading gain (VSG) CDMA are carried out considering correlation amongst signal and interferers and power control error (PCE). The effects of correlation and PCE on the outage performance of data users are also indicated. View full abstract»

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  • Performance evaluation of error resilient tools for MPEG-4 video transmission over a mobile channel

    Publication Year: 2002, Page(s):285 - 289
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (346 KB) | HTML iconHTML

    The paper deals with a. research project dealing with the transmission of video over terrestrial trunked radio (TETRA) mobile channels. The deployment of a reliable and efficient video communication service over TETRA mobile channels faces two major constraints: TETRA's limited available bandwidth and high channel error rates. For these reasons, the effective transmission of video over TETRA mobil... View full abstract»

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  • Efficient decoding of binary shortened cyclic fire code

    Publication Year: 2002, Page(s):11 - 15
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (375 KB) | HTML iconHTML

    Channel coding adds redundant bits to the original information bits in order to detect and correct possible errors occurring during transmission. In GSM (global system for mobile communications), we use both block coding and convolutional coding for error control. One of the channel coding schemes is CS-1 (see ETSI EN 300 909 v8.5.1, 1999), which employs shortened the cyclic fire code for burst er... View full abstract»

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