Pub Date : 1992-11-16DOI: 10.1109/ICCS.1992.255072
M. Itami, K. Itoh, M. Hatori
An optimization of the number of active taps of the transversal adaptive digital filter is examined. The optimal number changes in each stage of convergence.<>
研究了横向自适应数字滤波器有效抽头数的优化问题。每个收敛阶段的最优数都在变化
{"title":"A study on optimization of the number of taps of multipath distortion canceller in convergence process","authors":"M. Itami, K. Itoh, M. Hatori","doi":"10.1109/ICCS.1992.255072","DOIUrl":"https://doi.org/10.1109/ICCS.1992.255072","url":null,"abstract":"An optimization of the number of active taps of the transversal adaptive digital filter is examined. The optimal number changes in each stage of convergence.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"179 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126070507","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 : 1992-11-16DOI: 10.1109/ICCS.1992.255036
L. Qing, Ye Peida
On the basis of an improved model of an optical phase-locked loop and the rate equations of such a laser, the effects of loop feedback on the frequency fluctuation (FM) noise are discussed. A new linewidth formula of the local laser is presented.<>
{"title":"Theory of an external cavity semiconductor laser with optical phase-locked loop","authors":"L. Qing, Ye Peida","doi":"10.1109/ICCS.1992.255036","DOIUrl":"https://doi.org/10.1109/ICCS.1992.255036","url":null,"abstract":"On the basis of an improved model of an optical phase-locked loop and the rate equations of such a laser, the effects of loop feedback on the frequency fluctuation (FM) noise are discussed. A new linewidth formula of the local laser is presented.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127093385","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 : 1992-11-16DOI: 10.1109/ICCS.1992.255167
M. Takeuchi, A. Kajiwara, M. Nakagawa
A tracking scheme employing two tracking modes is proposed and its usefulness is confirmed by computer simulations. The simulation results show that the proposed scheme leads to a great improvement of the jitter performance in multipath fading channels.<>
{"title":"2-mode delay lock loop for mobile communications","authors":"M. Takeuchi, A. Kajiwara, M. Nakagawa","doi":"10.1109/ICCS.1992.255167","DOIUrl":"https://doi.org/10.1109/ICCS.1992.255167","url":null,"abstract":"A tracking scheme employing two tracking modes is proposed and its usefulness is confirmed by computer simulations. The simulation results show that the proposed scheme leads to a great improvement of the jitter performance in multipath fading channels.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122711079","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 : 1992-11-16DOI: 10.1109/ICCS.1992.254975
Zhou Chen, Chen Junliang
An overview of reuse methods for switching software is given, and an object oriented model is derived. Some formal definitions are given to support this OO method. Object oriented SDL and CHILL are used to promote specification and implementation reuse. A supporting environment for reuse is also developed to make the best use of reusable objects.<>
{"title":"Object oriented methodology for switching software reuse","authors":"Zhou Chen, Chen Junliang","doi":"10.1109/ICCS.1992.254975","DOIUrl":"https://doi.org/10.1109/ICCS.1992.254975","url":null,"abstract":"An overview of reuse methods for switching software is given, and an object oriented model is derived. Some formal definitions are given to support this OO method. Object oriented SDL and CHILL are used to promote specification and implementation reuse. A supporting environment for reuse is also developed to make the best use of reusable objects.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132664650","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 : 1992-11-16DOI: 10.1109/ICCS.1992.254968
S.C. Park, Y. Lee, W. Tsai
The authors introduce a new ATM switch architecture based on banyan interconnection networks. Its hardware is less complex than that of an output queueing switch. The reduction in the hardware complexity can be obtained without either losing the self-routing property or suffering from performance degradation under uniform and nonuniform traffic. The switch is constructed with shift network. It has an internal buffer that is interconnected in the banyan networks. The shift networks allow a cell to be sent to the correct output port. It needs only the destination address to route a cell regardless of the state of the switch. Although the switch becomes blocking, it retains the self-routing property and achieves the maximum throughput of 100% with only small additional delay.<>
{"title":"Performance analysis of banyan shift ATM switch","authors":"S.C. Park, Y. Lee, W. Tsai","doi":"10.1109/ICCS.1992.254968","DOIUrl":"https://doi.org/10.1109/ICCS.1992.254968","url":null,"abstract":"The authors introduce a new ATM switch architecture based on banyan interconnection networks. Its hardware is less complex than that of an output queueing switch. The reduction in the hardware complexity can be obtained without either losing the self-routing property or suffering from performance degradation under uniform and nonuniform traffic. The switch is constructed with shift network. It has an internal buffer that is interconnected in the banyan networks. The shift networks allow a cell to be sent to the correct output port. It needs only the destination address to route a cell regardless of the state of the switch. Although the switch becomes blocking, it retains the self-routing property and achieves the maximum throughput of 100% with only small additional delay.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130143427","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 : 1992-11-16DOI: 10.1109/ICCS.1992.255040
O. Ahmad, A.M. Alvarez, Chan Choong Wah
A method of measuring intelligence quantitatively in units of bits based on information theory is presented. The proposed definition of intelligence gives only a quantitative measure of the thinking process distinguishable from the information processing part and knowledge. It also treats intelligence as a resource and predicts that a C compiler uses more intelligence per instruction than a Spice program. The term 'capability for intelligence' is introduced and shows that a human being may have a much higher capability for intelligence than a microprocessor. The amount of intelligence measured can be used to develop more intelligent microprocessors and algorithms.<>
{"title":"Quantitative measure of intelligence","authors":"O. Ahmad, A.M. Alvarez, Chan Choong Wah","doi":"10.1109/ICCS.1992.255040","DOIUrl":"https://doi.org/10.1109/ICCS.1992.255040","url":null,"abstract":"A method of measuring intelligence quantitatively in units of bits based on information theory is presented. The proposed definition of intelligence gives only a quantitative measure of the thinking process distinguishable from the information processing part and knowledge. It also treats intelligence as a resource and predicts that a C compiler uses more intelligence per instruction than a Spice program. The term 'capability for intelligence' is introduced and shows that a human being may have a much higher capability for intelligence than a microprocessor. The amount of intelligence measured can be used to develop more intelligent microprocessors and algorithms.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131577536","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 : 1992-11-16DOI: 10.1109/ICCS.1992.255049
T. Yamazato, I. Sasase, S. Mori
A fast viterbi decoding is proposed and its error performance on additive white Gaussian noise channels analyzed. The frequency of each symbol of received sequence is counted and a reduction of add-compare-select operations is implemented by using the most-frequent symbol.<>
{"title":"A fast Viterbi decoding using the information of most-frequency symbol of convolutional code","authors":"T. Yamazato, I. Sasase, S. Mori","doi":"10.1109/ICCS.1992.255049","DOIUrl":"https://doi.org/10.1109/ICCS.1992.255049","url":null,"abstract":"A fast viterbi decoding is proposed and its error performance on additive white Gaussian noise channels analyzed. The frequency of each symbol of received sequence is counted and a reduction of add-compare-select operations is implemented by using the most-frequent symbol.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122925774","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 : 1992-11-16DOI: 10.1109/ICCS.1992.254989
T. Satoh, K. Yamazaki, N. Ubayama, O. Hirota
The authors clarify noise generation mechanisms due to optical fiber nonlinearity in laser amplifiers and squeezers in coherent communication systems, and discuss the mechanism of reduction of phase noise due to optical fiber nonlinearity by using a squeezer in optical coherent repeater systems. They show that considering the classical and the quantum behaviors of the Kerr effect separately makes it easier to understand the mechanism instinctively. They expect further technical development of squeezer in order to realize long-haul coherent communications systems.<>
{"title":"A quantum theoretical analysis of nonlinear phase noise","authors":"T. Satoh, K. Yamazaki, N. Ubayama, O. Hirota","doi":"10.1109/ICCS.1992.254989","DOIUrl":"https://doi.org/10.1109/ICCS.1992.254989","url":null,"abstract":"The authors clarify noise generation mechanisms due to optical fiber nonlinearity in laser amplifiers and squeezers in coherent communication systems, and discuss the mechanism of reduction of phase noise due to optical fiber nonlinearity by using a squeezer in optical coherent repeater systems. They show that considering the classical and the quantum behaviors of the Kerr effect separately makes it easier to understand the mechanism instinctively. They expect further technical development of squeezer in order to realize long-haul coherent communications systems.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128924671","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 : 1992-11-16DOI: 10.1109/ICCS.1992.255111
Xiong Qingxu, Liu Youheng
The integration of reliability and performance has received increasing attention. Performability, a new kind of network reliability measure is gradually employed in analysis. However, most results are based on the assumption that failures of different components are independent. Some solutions of the problem have been obtained, though they are preliminary. Some open issues are mentioned.<>
{"title":"On communication network reliability models","authors":"Xiong Qingxu, Liu Youheng","doi":"10.1109/ICCS.1992.255111","DOIUrl":"https://doi.org/10.1109/ICCS.1992.255111","url":null,"abstract":"The integration of reliability and performance has received increasing attention. Performability, a new kind of network reliability measure is gradually employed in analysis. However, most results are based on the assumption that failures of different components are independent. Some solutions of the problem have been obtained, though they are preliminary. Some open issues are mentioned.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128695879","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 : 1992-11-16DOI: 10.1109/ICCS.1992.255112
A. Lazar, Weiguo Wang, R.H. Deng
This paper reviews probabilistic and finite-state-machine approaches to network modelling for fault management. The fundamental structure of the fault management problem under the various models, and procedures which should be undertaken for fault detection and identification.<>
{"title":"Models and algorithms for network fault detection and identification: a review","authors":"A. Lazar, Weiguo Wang, R.H. Deng","doi":"10.1109/ICCS.1992.255112","DOIUrl":"https://doi.org/10.1109/ICCS.1992.255112","url":null,"abstract":"This paper reviews probabilistic and finite-state-machine approaches to network modelling for fault management. The fundamental structure of the fault management problem under the various models, and procedures which should be undertaken for fault detection and identification.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129119608","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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