# IEEE GLOBECOM 1998 (Cat. NO. 98CH36250)

## Filter Results

Displaying Results 1 - 25 of 110
• ### IEEE Globecom 1998 [front matter]

Publication Year: 1998, Page(s):i - xii
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• ### An emulator for testing the performance of framed access schemes

Publication Year: 1998, Page(s):3777 - 3782
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First Page of the Article
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• ### Author index

Publication Year: 1998, Page(s):xiii - xxi
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• ### Channel equalization using an Euclidean direction search based adaptive algorithm

Publication Year: 1998, Page(s):3479 - 3484 vol.6
Cited by:  Papers (3)
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An adaptive filtering algorithm based on the Euclidean direction search (EDS) method is presented for channel equalization. It is shown that this algorithm has a computational complexity of O(N), where N is the number of adaptable filter coefficients. It is also proven that the algorithm converges to the true solution and that the convergence rate of the EDS method is superior to that of the well ... View full abstract»

• ### Blind and semi-blind single user receiver techniques for asynchronous CDMA in multipath channels

Publication Year: 1998, Page(s):3572 - 3577 vol.6
Cited by:  Papers (7)  |  Patents (3)
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We consider multiple users in an asynchronous DS-CDMA system operating in a multipath environment. The received cyclostationary spread signal sampled at the chip rate is converted to a stationary vector signal, leading to a linear multichannel model. Linear receivers for multiple access interference (MAI) suppression are studied with emphasis on computationally simple algorithms. The desired user ... View full abstract»

• ### DSP implementation and design of trellis coded quantisation based on PUM codes

Publication Year: 1998, Page(s):3239 - 3243 vol.6
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This paper describes the DSP implementation and design of new trellis coded quantisation (TCQ) schemes based on the unit memory (UM) and partial unit memory (PUM) codes. We show that the minimum square quantisation error (MSQE) of the proposed scheme is very close to the conventional scheme, but the bit error performance of the proposed technique is better. In addition we prove that the block stru... View full abstract»

• ### Application of data aided phase control in the implementation of differential GMSK receivers

Publication Year: 1998, Page(s):3473 - 3478 vol.6
Cited by:  Papers (1)
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An implementation method for differential Gaussian minimum shift keying receivers with phase control is presented. It is shown that in such receivers the effect of intersymbol interference (ISI) on the signal, caused by the adjacent bits is reduced by introducing phase control in accordance with the data stream. This results in improved system performance, particularly at low values of time-bandw... View full abstract»

• ### Performance evaluation of the dual signal receiver for a quadrature modulation scheme

Publication Year: 1998, Page(s):3542 - 3547 vol.6
Cited by:  Papers (5)
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The dual signal receiver (DSR) is a narrowband multi-user receiver. Because of its lower complexity and promising results, it can be a valid alternative to CDMA multi-user reception schemes. This paper has three objectives, namely: (i) a presentation of a new realization of the DSR concept, (ii) an investigation of the performance of the DSR with QPSK, and (iii) a comparison of the results for the... View full abstract»

• ### Symbol timing recovery using digital spectral line method for 16-CAP VDSL system

Publication Year: 1998, Page(s):3467 - 3472 vol.6
Cited by:  Papers (1)  |  Patents (1)
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This paper presents a new digital spectral line symbol timing recovery method for 16-CAP VDSL system. The proposed method resolves the digital implementation issues of the analog counterpart in two ways: (i) it avoids the costly linear phase bandpass filter that would otherwise be necessary, and (ii) it resolves the bandwidth expansion problem by using a single-sided pre-filter pair. With the arch... View full abstract»

• ### Hidden Markov models for burst errors in GSM and DECT channels

Publication Year: 1998, Page(s):3692 - 3698 vol.6
Cited by:  Papers (7)
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Digital communication systems operating over fading radio channels suffer burst errors which can be modeled by a hidden Markov process model. An approach is presented for constructing HMM models for GSM and DECT channels using waveform level simulation and the resulting set of HMM models are tabulated for realistic values of the fading channel parameters. The use of the HMM model for protocol desi... View full abstract»

• ### Performance of multicode direct-detection optical CDMA systems

Publication Year: 1998, Page(s):3227 - 3232 vol.6
Cited by:  Papers (7)
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We analyze the performance of multicode direct-detection optical code-division multiple-access (CDMA) systems supporting several kinds of data with different bit rates: each user is assigned a set of sequence codes generated from time-shifted versions of optical orthogonal codes (OOCs). We analyze the performance of multicode direct-detection optical CDMA systems by using the mean value of the max... View full abstract»

• ### Averaging methods for blind multiuser detection in DS/CDMA systems

Publication Year: 1998, Page(s):3566 - 3571 vol.6
Cited by:  Papers (1)
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We present a blind adaptive code-aided algorithm for suppression of multiuser interference (MAI) and narrow-band interference (NBI) in DS/CDMA systems. The algorithm -which we call the BAG algorithm-is based on the concept of accelerating the convergence of stochastic gradient methods by averaging. This ingenious concept of averaging was invented by Polyak-our paper examines its application to int... View full abstract»

• ### Relating interoperability testing with conformance testing

Publication Year: 1998, Page(s):3768 - 3773 vol.6
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Conventionally the term conformance testing has been used to indiscriminately denote different types of conformance testing in a broad sense and the term interoperability testing has been used without regard to possibly different interoperability test architectures. This study classifies conformance testing into interface conformance testing and entity conformance testing and investigates how they... View full abstract»

• ### Performance modeling of advance resource reservation service

Publication Year: 1998, Page(s):3344 - 3349 vol.6
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We study the performance of advance resource reservation in a network environment with emphasis placed on multi-party conferencing. An immediate acknowledgment model is considered, where a reservation request is processed as soon as it is submitted. The set of links that interconnect the conference participants is determined by a routing function. Routing decisions can be affected by the way link ... View full abstract»

• ### Channel decoding of block codes with a priori information

Publication Year: 1998, Page(s):3536 - 3541 vol.6
Cited by:  Papers (1)
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We propose a complete transmission system for still images. This system comprises a VQ source encoder with a compression rate of 9 and the data is encoded using a BCH block code and mapped on a 16-QAM constellation. Two BCH codes are considered: BCH(29,24,3) and BCH(54,48,3). The parameters of the code book and channel encoder have been optimized for 16-QAM. We use a new joint source-channel decod... View full abstract»

• ### A novel threshold technique for minimizing error propagation in MDFE read channel

Publication Year: 1998, Page(s):3362 - 3367 vol.6
Cited by:  Papers (7)
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MDFE (multi-level decision feedback equalization) is an excellent detector for magnetic recording channels using (1,k) codes. However, being a decision feedback based scheme, MDFE also suffers from the phenomenon of error propagation. In this paper, a novel threshold approach is proposed for detection and partial suppression of error propagation in MDFE. A theoretical analysis of this approach is ... View full abstract»

• ### A new flexible multiuser detection scheme for DS CDMA systems

Publication Year: 1998, Page(s):3560 - 3565 vol.6
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We consider a synchronous code division multiple access (CDMA) system where all users share an additive white Gaussian noise channel. For this multiuser communication system a new so-called hybrid multiuser detection scheme based on a favourable link of multistage multiuser detection algorithms and maximum likelihood detection is presented. It is shown that this scheme yields a profitable tradeoff... View full abstract»

• ### Synchronization paradigm for protocol testing under multi-party configuration

Publication Year: 1998, Page(s):3460 - 3466 vol.6
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Protocol testing leads to the synchronization problem should test sequences be applied to multiple distanced testers, namely under the multi-party configuration. This paper presents a novel synchronization paradigm which seamlessly unifies two synchronization techniques, self-synchronizable sequences and external synchronization operations. To demonstrate the viability of the proposed paradigm, we... View full abstract»

• ### Investigation of IMBE parameters' sensitivity to noise

Publication Year: 1998, Page(s):3734 - 3739 vol.6
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In modern digital communication systems, more and more vocoders are used. At the same time improving their resistance to noise also becomes an important issue since their input speech is often unavoidably corrupted by noise when they work in real world. This paper investigates the improved multi-band excitation (IMBE) parameters' sensitivity to white noise and the parameter error's effect on the q... View full abstract»

• ### Performance analysis of integrated voice/data transmission in slotted CDMA packet radio communication networks

Publication Year: 1998, Page(s):3288 - 3294 vol.6
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This paper presents an exact analysis to numerically evaluate the performance of integrated voice/data slotted code division multiple access (CDMA) network systems with random access protocol for packet radio communications. The system model consists of a finite number of users and each user can be a source of both voice traffic and data traffic. The allocation of codes to voice sources is given p... View full abstract»

• ### Throughput analysis and design of fixed and adaptive ARQ/diversity systems for slow fading channels

Publication Year: 1998, Page(s):3686 - 3691 vol.6
Cited by:  Papers (3)  |  Patents (34)
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We study the performance of a fixed diversity (FD) ARQ system in which no error correction coding is used, and only second order transmitter diversity is used. In the system two spatially separated antennas are used to transmit the same information signal in a staggered fashion. In an FD system with two transmitting antennas, due to the staggered nature of transmission, the information rate of the... View full abstract»

• ### Numerical results on capacity bounds for magnetic recording channels

Publication Year: 1998, Page(s):3385 - 3390 vol.6
Cited by:  Papers (3)
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Capacity for magnetic recording channels has been difficult to calculate due to the binary input constraint. We summarize different capacity bounding techniques for channels with media and electronics noise. The performance of existing detectors are computed and compared to the proposed capacity bounds. Simulation results project a less than 3 dB gap between the capacity lower and upper bounds, an... View full abstract»

• ### A fragmented' restoration scheme for flat network architectures

Publication Year: 1998, Page(s):3763 - 3767 vol.6
Cited by:  Patents (2)
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An escalation strategy for a flat network based on the Big Crossconnects Architecture (BCA) and discordant virtual paths is proposed. The proposed scheme implements different restoration mechanisms at the switching and transport layers of the BCA for each discordant virtual path. The switching layer mechanism is called the dormant VP protection and will combine the best characteristics of dedicate... View full abstract»

• ### A high performance frequency and timing synchronization technique for OFDM

Publication Year: 1998, Page(s):3443 - 3448 vol.6
Cited by:  Papers (10)  |  Patents (22)
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In this paper, we propose a new signal-repetition-based frequency and timing synchronization technique for a burst OFDM modem in the severe fading environments typical of broadband wireless communication systems. The repeated synchronization signals are added at the beginning of the radio packets for synchronization agility. The proposed technique employs a weighting function for correlation calcu... View full abstract»

• ### Stochastic traffic features and queueing working conditions: a simulation study

Publication Year: 1998, Page(s):3338 - 3343 vol.6
Cited by:  Papers (2)
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The paper presents an extended simulation study aimed to the evaluation of the impact on queueing performance of different statistical features of actual traffic data. In particular the relevance of marginal distribution (PDF of the arrival rate) and memory properties (LRD-SRD) is considered, highlighting the impact of these features in different queueing scenarios, varying queue length and loadin... View full abstract»