1998 International Zurich Seminar on Broadband Communications. Accessing, Transmission, Networking. Proceedings (Cat. No.98TH8277)

17-19 Feb. 1998

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  • 1998 International Zurich Seminar on Broadband Communications. Accessing, Transmission, Networking. Proceedings (Cat. No.98TH8277)

    Publication Year: 1998
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    Freely Available from IEEE
  • Author index

    Publication Year: 1998, Page(s): 307
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    Freely Available from IEEE
  • A wireless multimedia DS-CDMA network based on adaptive transmission rate/power control

    Publication Year: 1998, Page(s):45 - 50
    Cited by:  Papers (3)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (476 KB)

    This paper proposes a method of synchronously controlling transmission rate and power for wireless multimedia code division multiple access (CDMA) systems. In the wireless multimedia system, quality of service (QoS) such as bit error rate (BER), signal-to-noise ratio (SNR) and delay time should be taken into account. The wireless CDMA system can achieve a flexible balance if transmission rate and ... View full abstract»

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  • Performance of a random OFDMA system for mobile communications

    Publication Year: 1998, Page(s):37 - 43
    Cited by:  Papers (5)  |  Patents (36)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (548 KB)

    In this paper we consider the uplink performance of an OFDMA (orthogonal frequency division multiple access) system for mobile communications. We describe the random OFDMA system which is based on MC-FDMA (multicarrier FDMA), and where each user has a set of randomly selected subchannels. We also analyze the problem of block synchronization in an OFDM transmission. Then we describe three different... View full abstract»

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  • Algorithms and VLSI architectures for RLS-based time reference beamforming in mobile communications

    Publication Year: 1998, Page(s):29 - 36
    Cited by:  Papers (1)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (948 KB)

    We propose the use of RLS-based techniques for adaptive antenna signal processing in mobile communications, where systems are required to operate reliably in the presence of strong interference and under time-varying propagation conditions. We present several practical schemes for implementing digital beamformers employing training sequences for initial weight adaptation and either periodically in... View full abstract»

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  • Implementation of HyperFM data broadcasting system

    Publication Year: 1998, Page(s):259 - 266
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (804 KB)

    In this paper, a HyperFM data broadcasting system is proposed, in which hypertext data are transmitted toward personal computers via an FM (frequency modulation) radio channel. This system is based on using the vacant frequency space in the FM radio band to broadcast multimedia data at a low cost. The HyperFM data are multiplexed with FM voice signals and transmitted at a rate of 16 kbps. The data... View full abstract»

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  • Comparison of threshold setting rules for the probability of acquisition in a DS spread spectrum receiver

    Publication Year: 1998, Page(s):23 - 28
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (380 KB)

    This paper describes the meaning of different threshold setting rules in the code acquisition process of a DS spread spectrum receiver. The consideration is made in an AWGN channel. The performance measure is the probability of the acquisition, Pacq, in a given observation interval. A matched filter acquisition is used with or without a verification mode using an active integration. The... View full abstract»

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  • Improvements of data transmission on ISI channels by means of channel matched m-ary PAM-trellis codes

    Publication Year: 1998, Page(s):253 - 257
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (392 KB)

    It is shown that data transmission using trellis codes with codewords equal to or very similar to the channel impulse response and its time reversed version outperform TCM-methods or methods using optimum codes for the AWGN channel concatenated with Tomlinson precoding (Tomlinson 1971; Fischer et al. 1995) View full abstract»

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  • Mobility management for wireless CATM networks

    Publication Year: 1998, Page(s):299 - 306
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (788 KB)

    A frame-structure, referred to as wireless CATM (CATV ATM) network, is introduced to provide multimedia communication to mobile terminals. The widespread CATV (community antenna TV) networks are attractive infrastructures for next generation wireless networks. Also, providing interactive broadband services over CATV networks is a big trend in communication and ATM (asynchronous transfer mode) netw... View full abstract»

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  • On the ability of CDMA to combat log-normal fading

    Publication Year: 1998, Page(s):17 - 22
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (552 KB)

    In contrast to the common opinion, that CDMA offers only advantages to overcome frequency-selective fading, it is shown that CDMA can combat log-normal fading (long-term fading), too. This statement holds under the following two conditions. First, equal transmission rates for all users are presupposed. Second, interference cancellation is applied to combat multiple access interference. Including c... View full abstract»

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  • Hard and soft decision decoding of phase rotation invariant block codes

    Publication Year: 1998, Page(s):249 - 251
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (192 KB)

    We consider a binary discrete channel with phase inversion and with random errors. Such a channel is a cascade of two channels. We also consider a continuous channel with phase inversion. For both channels, we wish to correct a phase inversion error when it occurs as well as random errors. For this purpose, we introduce a special metric to describe combinations of these errors. We call this metric... View full abstract»

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  • On the mobile radio capacity increase through SDMA

    Publication Year: 1998, Page(s):293 - 297
    Cited by:  Papers (9)  |  Patents (16)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (396 KB)

    In a cellular mobile radio system an SDMA component can be implemented for the reuse of radio channels physically incorporated by time, frequency or code slots. In this paper we will present simulation results on an SDMA downlink channel allocation scheme operating in a typical urban mobile radio cell. Based on the resulting blocking probabilities we will give estimations on the capacity increase ... View full abstract»

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  • TDMA-based broadband fixed radio access: performance and implementation issues of adaptive equalizers

    Publication Year: 1998, Page(s):193 - 200
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (656 KB)

    The performance of adaptive equalization strategies for future broadband fixed ATM radio access systems is investigated. The LMS and zero forcing algorithms are suitable for the downlink, whereas for the uplink, a fast converging RLS algorithm has to be employed. Furthermore, a hybrid F/TDMA has to be implemented to transmit the assumed 156 Mbit/s in the uplink. A complexity analysis comparing dif... View full abstract»

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  • QoS provisioning in handoff algorithms for wireless LAN

    Publication Year: 1998, Page(s):9 - 16
    Cited by:  Papers (3)  |  Patents (20)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (820 KB)

    The performance of the handoff algorithm is the primary concern for supporting mobile devices with roaming capability in wireless communications. The IEEE 802.11 standard for wireless local area networks (LANs) recommends carrier sense multiple access with collision avoidance (CSMA/CA) as the medium access control (MAC) protocol. The contention-based CSMA/CA access mechanism is sensitive to the tr... View full abstract»

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  • Combating multipath via directional antennas for broadband wireless ATM

    Publication Year: 1998, Page(s):119 - 126
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (700 KB)

    The rapid growth of multimedia wireless communications services spearheads the development of advanced wireless broadband systems with high reliability and high bit-rate. In order to achieve this goal, new system concepts with increased system capacity are required. Within this context, asynchronous transfer mode (ATM) is a rapidly maturing technology for a wired infrastructure and is also receivi... View full abstract»

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  • Construction of binary almost perfect sequences based on extended cyclic difference sets

    Publication Year: 1998, Page(s):243 - 248
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (456 KB)

    Sequences with noise-like characteristics are required for symbol synchronization, signal detection, signal estimation, spectrum spreading and secrecy coding. Periodic binary sequences exhibiting zero out-of-phase autocorrelation except one value in the middle are studied here. They are based mainly on cyclic difference sets D with parameters (v,k,λ), where k denotes the number of elements ... View full abstract»

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  • Coverage of macrocellular multicarrier joint detection code division multiple access (MC/JD-CDMA)

    Publication Year: 1998, Page(s):285 - 292
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (644 KB)

    Owing to the limited transmit powers of mobiles, the coverage of macrocellular radio systems is governed by the uplink. In this communication, the coverage of a macrocellular radio system deploying the recently proposed multicarrier joint detection code division multiple access (MC/JD-CDMA) is analyzed. We set out from the uplink minimally allowed mean received power Pe, min which is re... View full abstract»

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  • Efficient equalization of discrete wavelet multi-tone over twisted pair

    Publication Year: 1998, Page(s):185 - 191
    Cited by:  Papers (5)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (480 KB)

    In this paper, we examine the efficacy of different equalization schemes for discrete wavelet multi-tone (DWMT) with relatively high average bandwidth efficiency (6 bps/Hz). Using simulated bit error rate (BER) performance results, we demonstrate that the sensitivity of DWMT to small amounts of distortion in the end-to-end channel makes it infeasible to use only FIR filtering at the DWMT receiver ... View full abstract»

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  • Comparison of contention resolution algorithms for a cable modem MAC protocol

    Publication Year: 1998, Page(s):83 - 90
    Cited by:  Papers (11)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (832 KB)

    A reservation-based MAC protocol has been adopted by standards bodies as the basic protocol for data communication within the upstream channel of a cable plant. The available capacity is divided in two separate channels. One is a random access channel, or contention channel, used to send requests to the head-end, with the possibility of collisions occurring therein. When collisions happen, they ar... View full abstract»

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  • Resource management techniques applied to satellite communications networks

    Publication Year: 1998, Page(s):1 - 8
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (748 KB)

    Efficient resource management is mandatory to achieve maximum system capacity for the next generation communications systems. Resource management deals with the available spectral band, time, power, and space for a transmission signal. It includes (i) the frequency planning and (ii) the assignment of transmission resources to users. The paper presents a generalized notation as well as graph algori... View full abstract»

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  • Broadband transmission using OFDM: system performance and receiver complexity

    Publication Year: 1998, Page(s):99 - 104
    Cited by:  Papers (19)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (608 KB)

    This paper investigates the system performance of coherent OFDM transmission over frequency selective fading channels taking into account the constraints imposed by the receiver complexity. The effects of synchronization errors in the receiver are analyzed. In a properly designed inner receiver, these errors lead to extra noise. Specifying the limits for this additional noise allows one to derive ... View full abstract»

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  • Blind identification of channels for discrete multitone (DMT) applications

    Publication Year: 1998, Page(s):113 - 118
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (424 KB)

    This paper presents an alternate channel identification approach for discrete multitone (DMT) systems. This method uses a blind algorithm-instead of data-driven algorithms-to identify the channel from the received symbols and knowledge of the statistics of the transmitted symbols. The structure of an ideal DMT system is outlined, and the channel identification algorithm is developed as an extensio... View full abstract»

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  • Analysis of protocol sequences for slow frequency hopping

    Publication Year: 1998, Page(s):237 - 242
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (468 KB)

    Decoding error probability bounds are derived for slow frequency hopping schemes. For unslotted asynchronous multiple access random protocol sequences with interleaved codes are considered. Nonrandom constructions of protocol sequences with good cyclic correlation properties are given. For slotted access the maximum and average Hamming correlation properties of these protocol sequences imply error... View full abstract»

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  • Realizing the benefits of virtual LANs by using IPv6

    Publication Year: 1998, Page(s):279 - 283
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (452 KB)

    The benefits that virtual LANs offer can also be realized by using features of an IPv6 network together with the small enhancements to the IPv6 and DHCPv6 protocol stacks outlined in the present paper. The aim is to create complex network structures without a special layer 2 infrastructure. This proposal can be also applied to IPv4 networks wherein multicasting a DHCP is available View full abstract»

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  • A new flow control scheme for integrated ATM services

    Publication Year: 1998, Page(s):219 - 224
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (368 KB)

    A new synchronous flow control scheme for integrated ATM services using explicit rate indications (SER) is proposed in this paper. The presented scheme allocates bandwidth fairly, efficiently and rapidly. The rate of an available bit rate (ABR) source in the SER scheme goes up monotonously with time. By introducing virtual nodes, the transient durations experienced by ABR connections can further b... View full abstract»

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