ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384)最新文献_第9页

Performance and fault-tolerance analysis of a replicated HLR placement strategy in a broadband signaling transport network 宽带信号传输网络中复制HLR放置策略的性能和容错分析

ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384) Pub Date : 1998-10-05 DOI: 10.1109/ICUPC.1998.733065

D. Ghosal, G. Meempat, Tsong-Ho Wu

引用次数: 2

An adaptive DS-CDMA receiver for multipath and multi-user environments 一种多径多用户环境下的自适应DS-CDMA接收机

ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384) Pub Date : 1998-10-05 DOI: 10.1109/ICUPC.1998.733685

H. Khoshbin-Ghomash, R. Ormondroyd

引用次数: 0

Reliable ATM transmission of multimedia in wireless networks 无线网络中多媒体的ATM可靠传输

ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384) Pub Date : 1998-10-05 DOI: 10.1109/ICUPC.1998.733660

A. Michelson, A. Lewis, B. Basch, A. Levesque

{"title":"Reliable ATM transmission of multimedia in wireless networks","authors":"A. Michelson, A. Lewis, B. Basch, A. Levesque","doi":"10.1109/ICUPC.1998.733660","DOIUrl":"https://doi.org/10.1109/ICUPC.1998.733660","url":null,"abstract":"We described the error-control problems associated with supporting ATM transmission of multimedia services on line of sight (LOS) radio circuits. The major problems to address are associated with poor circuit quality and limited transmission bandwidths. Poor circuit quality is manifested by low received SNRs and high delivered BERs and can be improved by judicious application of error-control coding. The desire to support as many ATM users as possible and the constraint of limited bandwidth favor the use of high-rate coding techniques. To provide an acceptable QoS, however, the selected coding technique must be effective for all realistic channel conditions, including AWGN and slow Rician fading. It was shown that binary BCH codes can be used to provide a highly effective error-control technique for ATM transmission on LOS circuits. The wide selection of block lengths, rate, and error correction power allows solutions to be tailored to the wireless ATM application. It was shown that the best designs result when a powerful binary BCH code is used to protect the header and a somewhat less powerful code is used to protect the payload. The effects of residual uncorrected error events can then be addressed with an appropriate end-to-end error-control technique, or, in the case of MPEG video, with error concealment algorithms. It was also shown that Reed Solomon codes with erasure filling can provide an effective, high-rate, end-to-end coding scheme to protect against cell loss due to congestion in ATM networks and decoding failure events associated with the link codes.","PeriodicalId":341069,"journal":{"name":"ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126679964","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: 5

Dynamic reconfiguration and efficient resource allocation for indoor broadband wireless networks 室内宽带无线网络的动态重构与有效资源分配

ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384) Pub Date : 1998-10-05 DOI: 10.1109/ICUPC.1998.732805

T. Farnham, B. Foxon

{"title":"Dynamic reconfiguration and efficient resource allocation for indoor broadband wireless networks","authors":"T. Farnham, B. Foxon","doi":"10.1109/ICUPC.1998.732805","DOIUrl":"https://doi.org/10.1109/ICUPC.1998.732805","url":null,"abstract":"A combined frequency and time division multiple access (FDMA/TDMA) mechanism for implementing an indoor broadband radio access system at 5 GHz is described Farnham (see IEEE ICUPC, p.918-22, 1997 and Broadband Wireless Communications, Springer-Verlag, l998). The main feature of this approach is that real-time co-ordinated prioritised time slot assignments are performed in clusters of access points (APs), which share the same carrier frequency. Re-use partitioning is performed in time by simultaneously assigning time slots within a cluster of APs based on the expected level of interference and in frequency by allowing the carriers to be re-used by clusters of APs that are sufficiently isolated. The AP cluster configuration is important for efficient utilisation of the scarce radio resources. If the clusters remain fixed then the system can support uneven load distributions within each cluster, but is not able to adapt to supporting load distributions which are unevenly distributed between clusters or to interference from other systems. In this paper a method of dynamically reconfiguring the clusters to support changes in the geographic load distribution over time and external interference is investigated. The performance in the presence of small scale signal fading is obtained and compared.","PeriodicalId":341069,"journal":{"name":"ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121669066","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: 1

OFDM subchannel space-combining transmission diversity for broadband wireless communication systems 宽带无线通信系统的OFDM子信道空间组合传输分集

ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384) Pub Date : 1998-10-05 DOI: 10.1109/ICUPC.1998.732818

Y. Matsumoto, N. Mochizuki, M. Umehira

引用次数: 15

Access signaling and IN-based mobility management for wireless ATM systems 无线ATM系统的接入信令和基于in的移动性管理

ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384) Pub Date : 1998-10-05 DOI: 10.1109/ICUPC.1998.733634

N. H. Loukas, C.K. Xenakis, L. Merakos, I. Venieris

引用次数: 1

Low complexity bit mapping algorithm for multi-carrier communication systems with fading channels 信道衰落多载波通信系统的低复杂度位映射算法

ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384) Pub Date : 1998-10-05 DOI: 10.1109/ICUPC.1998.733645

Joonsuk Kim, Jiunn-Tsair Chen, J. Cioffi

引用次数: 13

Adaptive detection algorithms in DS-CDMA DS-CDMA中的自适应检测算法

ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384) Pub Date : 1998-10-05 DOI: 10.1109/ICUPC.1998.732803

M. Melvasalo, J. Virtamo

引用次数: 1

Admission control with priorities: approaches for multi-rate wireless systems 具有优先级的准入控制:多速率无线系统的方法

ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384) Pub Date : 1998-10-05 DOI: 10.1109/ICUPC.1998.732843

D. Ayyagari, A. Ephremides

引用次数: 12

Narrowband interference suppression in spread spectrum CDMA communications using pipelined recurrent neural networks 利用流水线递归神经网络抑制扩频CDMA通信中的窄带干扰

ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384) Pub Date : 1998-10-05 DOI: 10.1109/ICUPC.1998.733704

P. Chang

{"title":"Narrowband interference suppression in spread spectrum CDMA communications using pipelined recurrent neural networks","authors":"P. Chang","doi":"10.1109/ICUPC.1998.733704","DOIUrl":"https://doi.org/10.1109/ICUPC.1998.733704","url":null,"abstract":"This paper investigates the application of pipelined recurrent neural networks (PRNN) to the narrowband interference (NBI) suppression over spread spectrum CDMA channels in the presence of AWGN plus non-Gaussian observation noise. Optimal detectors and receivers for such channels are no longer linear. A PRNN that consists of a number of simpler small-scale recurrent neural network (RNN) modules with less computational complexity is conducted to introduce the best nonlinear approximation capability into the minimum mean squared error nonlinear predictor model in order to accurately predict the NBI signal based on adaptive learning for each module from previous non-Gaussian observations. Once the prediction of the NBI signal is obtained, a resulting signal is computed by subtracting the estimate from the received signal. Thus, the effect of the NBI can be reduced. Moreover, since those modules of a PRNN can be performed simultaneously in a pipelined parallelism fashion, this would lead to a significant improvement in its total computational efficiency. Simulation results show that PRNN-based NBI rejection provides a superior SNR improvement relative to the conventional adaptive nonlinear ACM filters, especially when the channel statistics and the exact number of CDMA users are not known to those receivers.","PeriodicalId":341069,"journal":{"name":"ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132778401","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: 30