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Emerging Technologies Symposium: Broadband, Wireless Internet Access, 2000 IEEE

Date 10-11 April 2000

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  • 2000 IEEE Emerging Technologies Symposium on Broadband, Wireless Internet Access. Digest of Papers (Cat. No.00EX414)

    Publication Year: 2000
    Request permission for commercial reuse | PDF file iconPDF (215 KB)
    Freely Available from IEEE
  • Architecture for IP mobility

    Publication Year: 2000
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    The Mobile IP protocol specifies an IP mobility solution for both IPv4 and IPv6. It introduces the concept of a home agent (HA) and a foreign agent (FA) which are essential pieces in the architecture. The main goal is to achieve seamless mobility as the mobile node moves from its home subnet to any other point of attachment. MIP, however, has limitations with routing, handoff, and security. The IP... View full abstract»

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  • TCP over packet radio

    Publication Year: 2000
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (398 KB)

    A wireless packet data communications system utilizing the General Packet Radio Service (GPRS) is studied. A traffic model that exhibits self-similarity is considered for wireless Internet applications. The radio channel is modeled as a two-state Markov fading channel. The performance of TCP over such a packet radio link is obtained through analysis and simulation. Theoretical bounds are derived f... View full abstract»

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  • Over the air handset management

    Publication Year: 2000
    Cited by:  Patents (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (330 KB)

    The advance in code division multiple access (CDMA) technology makes it possible for a third generation mobile station (MS) to support applications that require high data rates, capacity and multimedia capabilities. Future MSs are thus devices supporting voice, fax capabilities, data and messaging services. To support high quality services and improve the satisfaction of the users, over the air ma... View full abstract»

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  • Throughput analysis of ATM traffic over satellite links using ARQ and adaptive concatenated FEC codes

    Publication Year: 2000
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (301 KB)

    In this paper, we analyze the performance of an adaptive hybrid FEC/ARQ scheme that adjusts the code rate to match the channel conditions. The concatenated scheme is using a fixed-rate RS(59,53) over GF(2/sup 8/) as the outer code along with a rate-compatible punctured convolutional RCPC code as the inner code. The inner code has order 6 memory and its rate is 1/2, 4/7, 2/3, 4/5, or 8/9, depending... View full abstract»

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  • A combined antenna array and LMMSE multi-user detection DS-CDMA receiver in multipath fading channels

    Publication Year: 2000
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (379 KB)

    In this paper, a DS-CDMA receiver that combines adaptive beamforming together with a linear minimum mean square error (LMMSE) multi-user detection in a multipath fading channel is proposed and analyzed. By beamforming, the desired user's signal is enhanced and the co-channel interference from other directions is reduced. For in-beam multiple access interference reduction; LMMSE multi-user detectio... View full abstract»

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  • Aloha channel performance in a wireless data system employing antenna diversity receivers

    Publication Year: 2000
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (447 KB)

    In wireless data systems, Aloha channels are often used to send requests or short messages from a mobile station to the base station receiver. This paper evaluates a slotted Aloha channel with receiver antenna diversity; packets are transmitted in randomly selected time slots. The packet success-rate is studied as it relates to the carrier to noise plus interference ratio observed in each received... View full abstract»

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  • Further results on 3G CDMA transmit adaptive arrays

    Publication Year: 2000
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (433 KB)

    Transmit adaptive arrays (or "TX AA") have been shown previously to provide significant capacity improvements over open loop diversity techniques. This paper expands TX AA to utilize multiple antenna elements, compares the theoretical performance to open loop diversity, and examines techniques to reduce the feedback data rate. Results are presented for high data rate traffic channels operating on ... View full abstract»

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  • Global standardization efforts of BWA systems based on cable modem

    Publication Year: 2000
    Cited by:  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    Data-over-Cable Service Interface Specifications (DOCSIS) developed by Cable Labs has been adopted by the International Telecommunication Union (ITU) as a draft Recommendation in ITU-T and ITU-R. Nortel Networks has been spearheading the BWA standards efforts in ITU-R, ITU-T and in IEEE 802.16, that uses the cable modem specifications as a basis for wireless access systems in order to achieve econ... View full abstract»

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  • Iterative co-channel interference cancellation in narrowband mobile radio systems

    Publication Year: 2000
    Cited by:  Papers (2)  |  Patents (39)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (483 KB)

    In this paper, co-channel interference cancellation using iterative subtraction is proposed for narrow-band QPSK systems. Signal separability is obtained using both the relative timing delay between signals and the decoded bits output from the channel decoder. Cancellation after decoding results in more reliable signal subtraction, at the expense of interleaving delay. Simulation results show that... View full abstract»

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  • Open-loop transmit diversity for CDMA forward link

    Publication Year: 2000
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    Open-loop transmit diversity (TD) methods for the third generation (3G) CDMA cellular standards are briefly described. These solutions are based on orthogonal signal transmission from the base station to reduce same-cell interference. The performance enhancement due to this orthogonal signal transmission is studied and it is compared with traditional schemes. Performance bounds based on the Shanno... View full abstract»

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  • Channel coding performance in cdma2000 systems

    Publication Year: 2000
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (358 KB)

    Channel coding performance in a third generation mobile communication system is investigated in this paper. Specifically, the channel coding methods adopted in the cdma2000 standard along with the decoding procedures are described. The forward link performance of a cdma2000 system using both turbo codes and convolutional codes are studied. View full abstract»

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  • E-911 location standards and location commercial services

    Publication Year: 2000
    Cited by:  Papers (3)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (418 KB)

    Mobile location positioning technologies, initially developed in answer to the U.S. Federal Communications Commission (FCC) E-911 requirement have become an increasingly important topic in the standards development group. The U.S. FCC has mandated that by October 2001, mobile callers to E-911 must be located to within a certain accuracy level (i.e., 50 m in 67% of cases and 150 m in 95% of cases f... View full abstract»

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  • End to end QoS considerations for UMTS

    Publication Year: 2000
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (389 KB)

    The advent of 3G wide area cellular systems opens up the possibility of seamless roaming for IP based applications between wired/wireless LAN environments and wide area cellular coverage areas. Mechanisms to offer differentiated QoS to the Internet are currently being developed and deployed. Wide area cellular access to the Internet will need such mechanisms to offer users a seamless experience in... View full abstract»

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  • Global standardization of IMT-2000

    Publication Year: 2000
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (468 KB)

    As we usher in the new millennium, the International Mobile Telecommuncations-2000 (IMT-2000) standards are near completion. The much-anticipated standardization of the third generation (3G) wireless systems has been the focus of wireless standards organizations around the world for the last several years. Wireless standards activities have been underway in the ITU-R, ITU-T, TIA, Tl, ARIB, TTC, TT... View full abstract»

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  • Performance analysis of a wireless multirate DS-CDMA in multipath fading channels

    Publication Year: 2000
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    A new multirate technique for DS-CDMA mobile radio system is proposed tested and analyzed. In this technique, a variable processing gain multirate concept is used, but with another spreading strategy, serial time-orthogonal spreading. Every user in the cell is assigned a unique spreading code with the highest spreading factor regardless of its data rate. If the user is to send voice, the whole cod... View full abstract»

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  • EDGE air-interface capacity analysis

    Publication Year: 2000
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (267 KB)

    The third generation evolution paths for GSM and TDMA include a common air-interface standard entitled Enhanced Data Rates for Global Evolution (EDGE). This paper discuss the EDGE air-interface capabilities, modes, and features. It examines the frequency reuse, and link throughput capabilities for the EDGE radio interface in a TDMA network. The upper bound on the base station transceiver's (BTS) l... View full abstract»

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  • GSM mobile positioning simulator

    Publication Year: 2000
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    Mobile positioning technology has become an important area of research, for emergency as well as for commercial services. The handset-based enhanced observed time difference of arrival (E-OTD) location technology is one of the methods that has been standardized for mobile positioning in GSM-based networks. This paper describes the functionality of a software tool that is being used to analyze E-OT... View full abstract»

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  • DSP & analog SOC integration in the Internet era

    Publication Year: 2000
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (371 KB)

    In the PC era, microprocessors and memory were the semiconductor components that drove the PC industry. In the Internet era, DSP and analog functions will drive the Internet access industry. System-on-a-chip (SOC) integration will be the primary technology driver along with continuing Moore's law. This paper discusses the device issues on the integration of analog baseband, small signal RF functio... View full abstract»

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  • High efficiency K-band amplifier for on-satellite wireless communication systems

    Publication Year: 2000
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (287 KB)

    A high efficiency amplifier has been developed for use in K-band communication systems. The 3-stage amplifier achieves an average gain of 28 dB over the frequency range of 17 to 21 GHz. Six volt operation of the amplifier attains 28 dBm of output power at 45% power added efficiency at 19.5 GHz. This is the highest power added efficiency reported to date for a high gain, 3-stage amplifier fabricate... View full abstract»

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  • RF MEMS devices: a brave new world for RF technology

    Publication Year: 2000
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (369 KB)

    The design, fabrication, and behavior of a microelectromechanical (MEM) capacitive membrane microwave switching device is described. The switching element consists of a thin metallic membrane, which has two states, actuated or unactuated, depending on the applied bias. A microwave signal is switched on and off when the membrane is switched between the two states. The devices are electrostatically ... View full abstract»

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  • Smart antennas for broadband wireless access

    Publication Year: 2000
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    Smart antennas enable space division multiple access, that is they manage access to a network by accounting for where users are spatially and using antenna technology to better isolate signals from noise and interference. For mobile systems, the benefits are increased capacity from existing cell sites, maximum return on infrastructure investment, and improved network efficiency and performance. In... View full abstract»

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  • Customer premise antenna design for LMDS applications

    Publication Year: 2000
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (382 KB)

    This paper focuses on the design of customer premise equipment (CPE) antennas for Local Multipoint Distribution Services (LMDS). An overview of LMDS systems and applications is presented as an introduction followed by specific requirements of a CPE antenna. These requirements include electrical performance issues, such as FCC and ETSI regulations, aesthetic values of the antenna, as well as mechan... View full abstract»

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  • Designing embedded antennas

    Publication Year: 2000
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (210 KB)

    Antenna design has bewildered engineers, of most disciplines, since the dawn of wireless technology. To create a simple device with just the right geometry, material and connection has in itself proven an insurmountable task for those without the required training and background. An antenna must act as a transducer allowing an electrical current to transform from conducted energy on a metal conduc... View full abstract»

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  • A system architecture to maximize broadband fixed wireless capacity

    Publication Year: 2000
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (327 KB)

    This paper explores system architecture considerations in a broadband fixed wireless application. This paper further explores solutions that optimize the spectral efficiency of a deployment and maximize the bandwidth available to a subscriber. The system solution presented here uses FDD channelization and a TDMA protocol in the MMDS band and is applicable in the 3.5 GHz range, also. Two variants a... View full abstract»

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