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ICC '98. 1998 IEEE International Conference on Communications. Conference Record. Affiliated with SUPERCOMM'98 (Cat. No.98CH36220)最新文献

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Real-time broadband services with jitter control over ATM satellite bridges 实时宽带服务与抖动控制在ATM卫星桥
ICC '98. 1998 IEEE International Conference on Communications. Conference Record. Affiliated with SUPERCOMM'98 (Cat. No.98CH36220) Pub Date : 1998-06-07 DOI: 10.1109/ICC.1998.682591
H. L. Pocher, V. Leung, D. Gillies
{"title":"Real-time broadband services with jitter control over ATM satellite bridges","authors":"H. L. Pocher, V. Leung, D. Gillies","doi":"10.1109/ICC.1998.682591","DOIUrl":"https://doi.org/10.1109/ICC.1998.682591","url":null,"abstract":"A generic satellite interworking unit (IWU) is proposed for delivering real-time traffic across an arbitrary satellite bridge employing asynchronous transfer mode (ATM). End-to-end cell transfer delay (CTD) and cell delay variation (CDV) bounds are provided by logically associating cells to short duration link-level frames. In addition, a generic scheduler is proposed for the uplink earth station (ES). This scheduler only defines the service priorities and deadlines of queued cells but does not define the particular fashion in which an ES gains access to the shared transmission medium. Simulation results demonstrate that the quality of service (QoS) can be efficiently managed in order to maximize satellite throughput of real-time traffic.","PeriodicalId":218354,"journal":{"name":"ICC '98. 1998 IEEE International Conference on Communications. Conference Record. Affiliated with SUPERCOMM'98 (Cat. No.98CH36220)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128939782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Generalized versions of turbo decoding in the framework of Bayesian networks and Pearl's belief propagation algorithm 基于贝叶斯网络和Pearl信念传播算法的turbo译码的广义版本
ICC '98. 1998 IEEE International Conference on Communications. Conference Record. Affiliated with SUPERCOMM'98 (Cat. No.98CH36220) Pub Date : 1998-06-07 DOI: 10.1109/ICC.1998.682598
P. Meshkat, J. Villasenor
{"title":"Generalized versions of turbo decoding in the framework of Bayesian networks and Pearl's belief propagation algorithm","authors":"P. Meshkat, J. Villasenor","doi":"10.1109/ICC.1998.682598","DOIUrl":"https://doi.org/10.1109/ICC.1998.682598","url":null,"abstract":"We use the framework of Bayesian networks to introduce generalizations of the traditional turbo decoding algorithm. We show that traditional turbo decoding represents one of many ways in which the framework of Pearl's belief propagation algorithm (1988) can be applied for decoding of turbo codes. Simulation results show that a noisy received block which does not converge using traditional turbo decoding can converge to the correct value with one or more of the generalizations introduced here. Though we consider only the case of turbo codes with two constituent decoders here, these methods can be extended in a straightforward manner to codes with larger numbers of constituent decoders.","PeriodicalId":218354,"journal":{"name":"ICC '98. 1998 IEEE International Conference on Communications. Conference Record. Affiliated with SUPERCOMM'98 (Cat. No.98CH36220)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127396047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
COMETS for Ka-band and millimeter-wave advanced mobile satellite communications and 21 GHz advanced satellite broadcasting experiments COMETS用于ka波段和毫米波先进移动卫星通信和21千兆赫先进卫星广播实验
ICC '98. 1998 IEEE International Conference on Communications. Conference Record. Affiliated with SUPERCOMM'98 (Cat. No.98CH36220) Pub Date : 1998-06-07 DOI: 10.1109/ICC.1998.682590
H. Wakana, E. Morikawa, H. Saito, M. Ohkawa, Takashi Takahashi, M. Tanaka
{"title":"COMETS for Ka-band and millimeter-wave advanced mobile satellite communications and 21 GHz advanced satellite broadcasting experiments","authors":"H. Wakana, E. Morikawa, H. Saito, M. Ohkawa, Takashi Takahashi, M. Tanaka","doi":"10.1109/ICC.1998.682590","DOIUrl":"https://doi.org/10.1109/ICC.1998.682590","url":null,"abstract":"COMETS (Communications and Broadcasting Engineering Test Satellite), which was developed to evaluate Ka-band (31/21 GHz) and millimeter-wave (47/44 GHz) advanced mobile satellite communications and 21-GHz advanced satellite broadcasting systems, is presented as well as the developed ground terminals. COMETS carries an SCPC/TDM regenerative transponder for direct mobile-to-mobile communications, and IF-filterbanks for interconnection between multibeams. For mobile and personal applications, a portable terminal for regenerative transponder experiments, and several antennas such as an active phased array antenna, a waveguide slot array antenna, and a torus reflector antenna were developed. For satellite broadcasting experiments, trellis-coded modems for HDTV transmission at 60/140 Mbps and 155 Mbps were developed.","PeriodicalId":218354,"journal":{"name":"ICC '98. 1998 IEEE International Conference on Communications. Conference Record. Affiliated with SUPERCOMM'98 (Cat. No.98CH36220)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130500390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
On cell breathing in CDMA networks CDMA网络中细胞呼吸的研究
ICC '98. 1998 IEEE International Conference on Communications. Conference Record. Affiliated with SUPERCOMM'98 (Cat. No.98CH36220) Pub Date : 1998-06-07 DOI: 10.1109/ICC.1998.685159
Angela Amphawan
{"title":"On cell breathing in CDMA networks","authors":"Angela Amphawan","doi":"10.1109/ICC.1998.685159","DOIUrl":"https://doi.org/10.1109/ICC.1998.685159","url":null,"abstract":"The objective of this paper is to provide an assessment of the advantages that cell breathing may give in optimal management of CDMA network capacity. The paper studies the capabilities of cell breathing and is primarily intended to determine whether there are any deployment and/or traffic scenarios where the breathing algorithm can be used to improve capacity in high traffic cells by redirecting mobiles to surrounding cells.","PeriodicalId":218354,"journal":{"name":"ICC '98. 1998 IEEE International Conference on Communications. Conference Record. Affiliated with SUPERCOMM'98 (Cat. No.98CH36220)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131087557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 58
Performance of high rate turbo codes on a PR4-equalized magnetic recording channel 高速率turbo码在pr4均衡磁记录通道上的性能
ICC '98. 1998 IEEE International Conference on Communications. Conference Record. Affiliated with SUPERCOMM'98 (Cat. No.98CH36220) Pub Date : 1998-06-07 DOI: 10.1109/ICC.1998.685151
W. Ryan
{"title":"Performance of high rate turbo codes on a PR4-equalized magnetic recording channel","authors":"W. Ryan","doi":"10.1109/ICC.1998.685151","DOIUrl":"https://doi.org/10.1109/ICC.1998.685151","url":null,"abstract":"We discuss the applicability of high rate turbo codes for magnetic recording, citing in particular the attractiveness of interleaver gain as opposed to coding gain. We then examine the performance of rate 4/5, 8/9, and 16/17 turbo codes on a PRA-equalized magnetic recording channel at a user density of S/sub u/=2.0. Simulation results show that a gain of 7.1 dB relative to the uncoded situation is attainable at an error rate of 10/sup -5/ for the rate 4/5 and 8/9 codes, whereas the rate 16/17 code achieves a gain of 6.5 dB.","PeriodicalId":218354,"journal":{"name":"ICC '98. 1998 IEEE International Conference on Communications. Conference Record. Affiliated with SUPERCOMM'98 (Cat. No.98CH36220)","volume":"141 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132898251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 106
Modeling and analysis of waiting time in a symmetric fast circuit switched robust-WDM LAN with an AR/LTP MAC protocol 基于AR/LTP MAC协议的对称快速电路交换鲁棒wdm局域网的等待时间建模与分析
ICC '98. 1998 IEEE International Conference on Communications. Conference Record. Affiliated with SUPERCOMM'98 (Cat. No.98CH36220) Pub Date : 1998-06-07 DOI: 10.1109/ICC.1998.682666
T. S. El-Bawab, A. Jayasumana
{"title":"Modeling and analysis of waiting time in a symmetric fast circuit switched robust-WDM LAN with an AR/LTP MAC protocol","authors":"T. S. El-Bawab, A. Jayasumana","doi":"10.1109/ICC.1998.682666","DOIUrl":"https://doi.org/10.1109/ICC.1998.682666","url":null,"abstract":"The robust-WDM is proposed to realize wavelength division multiplexed (WDM) local area networks (LANs) in the presence of laser wavelength drifts. The approach of robust-WDM is to design access protocols that can exploit a new wavelength-tracking receiver. We introduce an analytical model that can be used as a tool to design robust-WDM LANs, and to predict and understand their performance characteristics. The model is designated for a class of these networks that relies on an aperiodic-reservation based access protocol and uses a token-passing control channel to organize the right to reserve among nodes.","PeriodicalId":218354,"journal":{"name":"ICC '98. 1998 IEEE International Conference on Communications. Conference Record. Affiliated with SUPERCOMM'98 (Cat. No.98CH36220)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128579068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
An adaptive diversity receiver for OFDM in fading channels 一种用于衰落信道OFDM的自适应分集接收机
ICC '98. 1998 IEEE International Conference on Communications. Conference Record. Affiliated with SUPERCOMM'98 (Cat. No.98CH36220) Pub Date : 1998-06-07 DOI: 10.1109/ICC.1998.683040
S. Bulumulla, S. Kassam, S. Venkatesh
{"title":"An adaptive diversity receiver for OFDM in fading channels","authors":"S. Bulumulla, S. Kassam, S. Venkatesh","doi":"10.1109/ICC.1998.683040","DOIUrl":"https://doi.org/10.1109/ICC.1998.683040","url":null,"abstract":"Interest in OFDM has renewed with the standardization of OFDM for digital audio broadcasting in Europe. In this paper, we consider an adaptive, diversity receiver for OFDM signals in a Rayleigh fading channel. The diversity receiver has L branches with each branch receiving the signal from L independently fading diversity channels. We model the fading process as a vector auto-regressive process and use the Kalman filter to obtain the MMSE optimum channel estimates for each branch. The channel estimates and the signals are combined using the maximal ratio combining rule to obtain the decision variables. We analyze the performance of this receiver and provide a numerical example to highlight the advantage of using diversity.","PeriodicalId":218354,"journal":{"name":"ICC '98. 1998 IEEE International Conference on Communications. Conference Record. Affiliated with SUPERCOMM'98 (Cat. No.98CH36220)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132930960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 31
Increasing the DS/CDMA system reverse link capacity by equalizing the performance of different velocity users 通过均衡不同速度用户的性能，提高DS/CDMA系统反向链路容量
ICC '98. 1998 IEEE International Conference on Communications. Conference Record. Affiliated with SUPERCOMM'98 (Cat. No.98CH36220) Pub Date : 1998-06-07 DOI: 10.1109/ICC.1998.685158
B. Hashem, E. Sousa
{"title":"Increasing the DS/CDMA system reverse link capacity by equalizing the performance of different velocity users","authors":"B. Hashem, E. Sousa","doi":"10.1109/ICC.1998.685158","DOIUrl":"https://doi.org/10.1109/ICC.1998.685158","url":null,"abstract":"The capacity of the reverse link DS/CDMA system has been investigated by many researchers. Power control is essential for such systems to increase the capacity. Power control based on equalizing the received power levels from different users was proposed. The user's bit error rate (BER) depends on its received signal to noise ratio (SNR). Since the user's required SNR to achieve a given BER depends on its velocity, low mobility users are expected to have a lower BER compared to high mobility ones. Hence, the BER performance of a high mobility user is investigated when determining the system capacity. We propose a power control algorithm based also on power level measurements but where the required threshold is determined according to the user velocity where slow users thresholds are lower than fast ones. This results in increasing the slow users BER but lower the interference they cause to other users and hence increases the system capacity. This increase in capacity is found to be about 30% for a three resolvable Rayleigh fading paths channel and a path-loss exponent of four.","PeriodicalId":218354,"journal":{"name":"ICC '98. 1998 IEEE International Conference on Communications. Conference Record. Affiliated with SUPERCOMM'98 (Cat. No.98CH36220)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133849983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 15
A hidden Markov model-RPE algorithm for narrowband interference suppression in spread spectrum systems 扩频系统窄带干扰抑制的隐马尔可夫模型- rpe算法
ICC '98. 1998 IEEE International Conference on Communications. Conference Record. Affiliated with SUPERCOMM'98 (Cat. No.98CH36220) Pub Date : 1998-06-07 DOI: 10.1109/ICC.1998.685107
L. Johnston, V. Krishnamurthy
{"title":"A hidden Markov model-RPE algorithm for narrowband interference suppression in spread spectrum systems","authors":"L. Johnston, V. Krishnamurthy","doi":"10.1109/ICC.1998.685107","DOIUrl":"https://doi.org/10.1109/ICC.1998.685107","url":null,"abstract":"This paper presents a novel nonlinear estimation algorithm based on hidden Markov models for narrowband interference suppression in CDMA spread spectrum systems. The proposed algorithm combines a recursive hidden Markov model estimator, a Kalman filter and a recursive prediction error parameter estimation algorithm. It is shown that the proposed algorithm not only outperforms the nonlinear filtering techniques for narrowband interference suppression presented in Rusch and Poor (1994), but that it outperforms and has faster, more robust convergence properties than the cross-coupled expectation maximization based algorithm presented in Logothetis and Krishnamurthy.","PeriodicalId":218354,"journal":{"name":"ICC '98. 1998 IEEE International Conference on Communications. Conference Record. Affiliated with SUPERCOMM'98 (Cat. No.98CH36220)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133974042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Effect of imperfect amplitude estimation on the performance of hybrid interference cancellation 不完全振幅估计对混合干扰消除性能的影响
ICC '98. 1998 IEEE International Conference on Communications. Conference Record. Affiliated with SUPERCOMM'98 (Cat. No.98CH36220) Pub Date : 1998-06-07 DOI: 10.1109/ICC.1998.683088
D. Koulakiotis, H. Aghvami
{"title":"Effect of imperfect amplitude estimation on the performance of hybrid interference cancellation","authors":"D. Koulakiotis, H. Aghvami","doi":"10.1109/ICC.1998.683088","DOIUrl":"https://doi.org/10.1109/ICC.1998.683088","url":null,"abstract":"The impact of imperfect amplitude estimation on interference cancellation is addressed in this study. Several parameters are discussed such as position of training sequence, influence of Doppler frequency and symbol rate. It is shown that, when using linear interpolation, the idea of splitting the training sequence into 3 parts as a pre-/ mid-/ post-amble allows the evolution of the channel to be followed with greater accuracy than in the case of mid-amble only. In addition, for fast fading rate channels, the idea of processing the estimates in two different lines is introduced and improves estimation. The conclusion is that linear interpolation can offer a solution for the channel estimation required by interference cancellation, combining very low complexity and very good channel tracking capability even at relative high vehicular speeds.","PeriodicalId":218354,"journal":{"name":"ICC '98. 1998 IEEE International Conference on Communications. Conference Record. Affiliated with SUPERCOMM'98 (Cat. No.98CH36220)","volume":"323 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114059011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
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