Pub Date : 1996-05-05DOI: 10.1109/ICCT.1996.545132
G. Schopflin, C. Weiske, E. Mullner, F. Znidarsic, U. Fischer, K. Kotten, J. Wildmoser, J. Krapfl
Future 10 Gbit/s-TDM systems demand high-speed circuits with a high level of integration in order to be reliable and cost-effective. The building blocks of a 10 Gbit/s-system and a four-part chip-set (16:1 multiplexer, laser-/modulator-driver, AGC-amplifier, 1:16 demultiplexer) are described. The results show the suitability of Si-bipolar technologies for this data rate.
{"title":"Realization of a commercial 10 Gbit/s TDM transmission system","authors":"G. Schopflin, C. Weiske, E. Mullner, F. Znidarsic, U. Fischer, K. Kotten, J. Wildmoser, J. Krapfl","doi":"10.1109/ICCT.1996.545132","DOIUrl":"https://doi.org/10.1109/ICCT.1996.545132","url":null,"abstract":"Future 10 Gbit/s-TDM systems demand high-speed circuits with a high level of integration in order to be reliable and cost-effective. The building blocks of a 10 Gbit/s-system and a four-part chip-set (16:1 multiplexer, laser-/modulator-driver, AGC-amplifier, 1:16 demultiplexer) are described. The results show the suitability of Si-bipolar technologies for this data rate.","PeriodicalId":395678,"journal":{"name":"Proceedings of International Conference on Communication Technology. ICCT '96","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129761617","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}
Pub Date : 1996-05-05DOI: 10.1109/ICCT.1996.545028
Yongzheng Zhang
Neural networks with back-propagation learning algorithms are applied to the prediction of traffic fluctuation in circuit-switched telecommunication networks. The selection of the neural network structure and input/output musters are discussed in detail. The prediction of traffic with neural networks is simulated and then compared with other prediction methods. The results show that neural networks can reduce the prediction error extensively. This forecasting method is then combined with adaptive routing, and the simulation shows that the performance of telecommunications networks, the sum of end-to-end blocking probabilities for all node-pairs, can be improved.
{"title":"Prediction of traffic fluctuation in telephone networks with neural networks","authors":"Yongzheng Zhang","doi":"10.1109/ICCT.1996.545028","DOIUrl":"https://doi.org/10.1109/ICCT.1996.545028","url":null,"abstract":"Neural networks with back-propagation learning algorithms are applied to the prediction of traffic fluctuation in circuit-switched telecommunication networks. The selection of the neural network structure and input/output musters are discussed in detail. The prediction of traffic with neural networks is simulated and then compared with other prediction methods. The results show that neural networks can reduce the prediction error extensively. This forecasting method is then combined with adaptive routing, and the simulation shows that the performance of telecommunications networks, the sum of end-to-end blocking probabilities for all node-pairs, can be improved.","PeriodicalId":395678,"journal":{"name":"Proceedings of International Conference on Communication Technology. ICCT '96","volume":"2270 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130250397","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}
Pub Date : 1996-05-05DOI: 10.1109/ICCT.1996.545031
L. Riping, G. Zixiang, F. Suochum
Based on nonlinear dynamics theory, this article presents an artificial neural network (ANN) blind equalizer associated with its nonlinear dynamic equation and its stability conditions. Simulation results indicate that this ANN blind equalizer has a very strong tolerance of and adaptation to the time-varying high speed channel. The bit rate of its equalized channel can be as high as 10 Gbps.
{"title":"A blind equalizer based on nonlinear dynamics neural networks","authors":"L. Riping, G. Zixiang, F. Suochum","doi":"10.1109/ICCT.1996.545031","DOIUrl":"https://doi.org/10.1109/ICCT.1996.545031","url":null,"abstract":"Based on nonlinear dynamics theory, this article presents an artificial neural network (ANN) blind equalizer associated with its nonlinear dynamic equation and its stability conditions. Simulation results indicate that this ANN blind equalizer has a very strong tolerance of and adaptation to the time-varying high speed channel. The bit rate of its equalized channel can be as high as 10 Gbps.","PeriodicalId":395678,"journal":{"name":"Proceedings of International Conference on Communication Technology. ICCT '96","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131141495","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}
Pub Date : 1996-05-05DOI: 10.1109/ICCT.1996.545235
Minying Sun, Gang Wang, Shilou Jia
We present an analytical method to evaluate the performance of the buffered Banyan network based ATM switches. The switching elements in the interconnection network are provided with a buffer which is shared among all the inlets and outlets of the element. This approach is a iterative computational method. It is based on an approximate discrete time finite-state Markov model of a switch. We present an exact analysis of the 2/spl times/2 and 4/spl times/4 switching element with a shared-buffer. Performance measures of interest in the ATM switching fabric are computed. The load, buffer-size and input/output size has an influence on the performance which is demonstrated in curves. Compared with the simulation method, the analytical technique is more accurate especially in heavy load conditions.
{"title":"Queueing analysis of buffered ATM switches","authors":"Minying Sun, Gang Wang, Shilou Jia","doi":"10.1109/ICCT.1996.545235","DOIUrl":"https://doi.org/10.1109/ICCT.1996.545235","url":null,"abstract":"We present an analytical method to evaluate the performance of the buffered Banyan network based ATM switches. The switching elements in the interconnection network are provided with a buffer which is shared among all the inlets and outlets of the element. This approach is a iterative computational method. It is based on an approximate discrete time finite-state Markov model of a switch. We present an exact analysis of the 2/spl times/2 and 4/spl times/4 switching element with a shared-buffer. Performance measures of interest in the ATM switching fabric are computed. The load, buffer-size and input/output size has an influence on the performance which is demonstrated in curves. Compared with the simulation method, the analytical technique is more accurate especially in heavy load conditions.","PeriodicalId":395678,"journal":{"name":"Proceedings of International Conference on Communication Technology. ICCT '96","volume":"172 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123008311","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}
Pub Date : 1996-05-05DOI: 10.1109/ICCT.1996.545022
M. Bischoff, M. Huber
In the future the existing transport network will be enhanced by adding a new network layer based on optical frequency division multiplexing. This network is characterized by an efficient cross-connecting of very high bit rate streams (10 Gbit/s or higher) carried by an optical frequency channel. In case of a cable break or node failure a huge amount of data will be lost. The high traffic concentration in all-optical transport networks makes network restoration of paramount importance. A scheme for restoration methods is presented. Four methods are assessed qualitatively and quantitatively using a ten node sample network. The results indicate that the cost for the redundancy to be installed may be high in all cases.
{"title":"Survivability concepts for all-optical transport networks","authors":"M. Bischoff, M. Huber","doi":"10.1109/ICCT.1996.545022","DOIUrl":"https://doi.org/10.1109/ICCT.1996.545022","url":null,"abstract":"In the future the existing transport network will be enhanced by adding a new network layer based on optical frequency division multiplexing. This network is characterized by an efficient cross-connecting of very high bit rate streams (10 Gbit/s or higher) carried by an optical frequency channel. In case of a cable break or node failure a huge amount of data will be lost. The high traffic concentration in all-optical transport networks makes network restoration of paramount importance. A scheme for restoration methods is presented. Four methods are assessed qualitatively and quantitatively using a ten node sample network. The results indicate that the cost for the redundancy to be installed may be high in all cases.","PeriodicalId":395678,"journal":{"name":"Proceedings of International Conference on Communication Technology. ICCT '96","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125650573","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}
Pub Date : 1996-05-05DOI: 10.1109/ICCT.1996.545134
Q.T. Zhang
In a typical land mobile radio system, the received signal usually suffers from multipath fading, severely degradating the service quality. Equal gain combiner (EGG) is a powerful means to combat multipath fading and has long been used in practice owing to its good performance and ease of implementation. Nevertheless, the error probability of the EGC in a closed form is still not available in the literature. By formulating the problem in the framework of signal detection and evaluating the probability of error directly from the characteristic function (CF) of the signal at the combiner output, we obtain closed form solutions to the probability of error for the EG combiner with two or three branches operating over a Rayleigh fading channel.
{"title":"Some closed-form solutions to the equal gain combiner over Rayleigh fading channels","authors":"Q.T. Zhang","doi":"10.1109/ICCT.1996.545134","DOIUrl":"https://doi.org/10.1109/ICCT.1996.545134","url":null,"abstract":"In a typical land mobile radio system, the received signal usually suffers from multipath fading, severely degradating the service quality. Equal gain combiner (EGG) is a powerful means to combat multipath fading and has long been used in practice owing to its good performance and ease of implementation. Nevertheless, the error probability of the EGC in a closed form is still not available in the literature. By formulating the problem in the framework of signal detection and evaluating the probability of error directly from the characteristic function (CF) of the signal at the combiner output, we obtain closed form solutions to the probability of error for the EG combiner with two or three branches operating over a Rayleigh fading channel.","PeriodicalId":395678,"journal":{"name":"Proceedings of International Conference on Communication Technology. ICCT '96","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125986505","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}
Pub Date : 1996-05-05DOI: 10.1109/ICCT.1996.545246
T. Nishio, H. Ikeda, H. Yoshida
This paper describes a short distance single-mode optical fiber data transmission system, which is constructed using an AO mode space frequency modulator, in which an edge-emitting LED is used as a light source. The output frequency responses for the 0th and 1st order beams from the AO mode space frequency modulator were flat over the frequency range of DC to 3.5 MHz when a squarewave frequency modulation (SWFM) was accomplished. When 12 channels of SSB data modulated the squarewave carrier at a frequency of 2.5 MHz, the obtained SWFM signal was transmitted over a distance of 5 km through single-mode optical fibers.
{"title":"Optical fiber data transmission system using AO mode space frequency modulator and LED","authors":"T. Nishio, H. Ikeda, H. Yoshida","doi":"10.1109/ICCT.1996.545246","DOIUrl":"https://doi.org/10.1109/ICCT.1996.545246","url":null,"abstract":"This paper describes a short distance single-mode optical fiber data transmission system, which is constructed using an AO mode space frequency modulator, in which an edge-emitting LED is used as a light source. The output frequency responses for the 0th and 1st order beams from the AO mode space frequency modulator were flat over the frequency range of DC to 3.5 MHz when a squarewave frequency modulation (SWFM) was accomplished. When 12 channels of SSB data modulated the squarewave carrier at a frequency of 2.5 MHz, the obtained SWFM signal was transmitted over a distance of 5 km through single-mode optical fibers.","PeriodicalId":395678,"journal":{"name":"Proceedings of International Conference on Communication Technology. ICCT '96","volume":"18 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125759361","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}
Pub Date : 1996-05-05DOI: 10.1109/ICCT.1996.545179
L. Xiaokang, L. Yihan, M. Shiwen, X. Yi
This paper presents a narrowband asynchronous transfer mode (narrowband ATM or NATM) network and its differences from ATM specified by ITU. The technical characteristics, provided services and its applications are also introduced.
{"title":"Narrowband ATM network","authors":"L. Xiaokang, L. Yihan, M. Shiwen, X. Yi","doi":"10.1109/ICCT.1996.545179","DOIUrl":"https://doi.org/10.1109/ICCT.1996.545179","url":null,"abstract":"This paper presents a narrowband asynchronous transfer mode (narrowband ATM or NATM) network and its differences from ATM specified by ITU. The technical characteristics, provided services and its applications are also introduced.","PeriodicalId":395678,"journal":{"name":"Proceedings of International Conference on Communication Technology. ICCT '96","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127786066","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}
Pub Date : 1996-05-05DOI: 10.1109/ICCT.1996.545154
M. Kemp
This paper describes a research project being undertaken in BNR (Bell Northern Research), to investigate ATM based architectures and technology for the next generation multi-media, multi-service broadband access platforms. It provides an overview of the project and the high level results to date. A more detailed analysis is provided of one aspect of the work considered a critical underpinning for any multimedia network deployment, i.e. flow control. Finally it details a collaborative industry/academia project, the objective of which, is to take the research beyond theory through building an experimental network.
{"title":"Multi-media access architectures","authors":"M. Kemp","doi":"10.1109/ICCT.1996.545154","DOIUrl":"https://doi.org/10.1109/ICCT.1996.545154","url":null,"abstract":"This paper describes a research project being undertaken in BNR (Bell Northern Research), to investigate ATM based architectures and technology for the next generation multi-media, multi-service broadband access platforms. It provides an overview of the project and the high level results to date. A more detailed analysis is provided of one aspect of the work considered a critical underpinning for any multimedia network deployment, i.e. flow control. Finally it details a collaborative industry/academia project, the objective of which, is to take the research beyond theory through building an experimental network.","PeriodicalId":395678,"journal":{"name":"Proceedings of International Conference on Communication Technology. ICCT '96","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131360165","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}
Pub Date : 1996-05-05DOI: 10.1109/ICCT.1996.545213
R. Lebouquin-Jeannes, G. Faucon, B. Ayad
This paper proposes a two-microphone technique for noise reduction and acoustic echo cancellation (AEC) in hands-free communications. Contrary to the standard cascaded structure, this new structure includes a preprocessing which allows to reduce the noise influence on the AEC system. The efficiency of the new structure is proved through objective measures and listening tests.
{"title":"A two-microphone approach for speech enhancement in hands-free communications","authors":"R. Lebouquin-Jeannes, G. Faucon, B. Ayad","doi":"10.1109/ICCT.1996.545213","DOIUrl":"https://doi.org/10.1109/ICCT.1996.545213","url":null,"abstract":"This paper proposes a two-microphone technique for noise reduction and acoustic echo cancellation (AEC) in hands-free communications. Contrary to the standard cascaded structure, this new structure includes a preprocessing which allows to reduce the noise influence on the AEC system. The efficiency of the new structure is proved through objective measures and listening tests.","PeriodicalId":395678,"journal":{"name":"Proceedings of International Conference on Communication Technology. ICCT '96","volume":"306 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133199918","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}
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