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Analytical approximations for the magnetic readback signal with application to pulse slimming equalization 磁回读信号的解析近似及其在脉冲减径均衡中的应用
IEEE International Conference on Communications, Including Supercomm Technical Sessions Pub Date : 1990-04-16 DOI: 10.1109/ICC.1990.117353
C. Melas, P. Arnett
{"title":"Analytical approximations for the magnetic readback signal with application to pulse slimming equalization","authors":"C. Melas, P. Arnett","doi":"10.1109/ICC.1990.117353","DOIUrl":"https://doi.org/10.1109/ICC.1990.117353","url":null,"abstract":"The two-parameter arctangent formula is shown to represent a realistic model for the output of a ferrite head. The parameters are estimates of the gap width and head-to-medium separation for a thin medium and ferrite head. As the ratio of gap width to separation approaches zero, the arctangent function approaches the Lorentzian. The accuracy of the arctangent approximation is evaluated by comparison with actual flux transition responses, as well as with responses generated by a self-consistent two-dimensional physical model of the magnetic process. The Fourier transform of the two-parameter formula is a simple analytic expression providing a good approximation to the head frequency spectrum. The simpler one-parameter Lorentzian approximation, although adequate in many applications, yields optimistic results for pulse-slimming equalization in low-noise environments.<<ETX>>","PeriodicalId":126008,"journal":{"name":"IEEE International Conference on Communications, Including Supercomm Technical Sessions","volume":"2012 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127397979","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
Network management: standardisation and issues 网络管理:标准化和问题
IEEE International Conference on Communications, Including Supercomm Technical Sessions Pub Date : 1990-04-16 DOI: 10.1109/ICC.1990.117046
F. Peeters
{"title":"Network management: standardisation and issues","authors":"F. Peeters","doi":"10.1109/ICC.1990.117046","DOIUrl":"https://doi.org/10.1109/ICC.1990.117046","url":null,"abstract":"The author discusses a number of international and European standardization bodies and their present involvement in telecommunications management networks standardization. Some overlap and liaison problems are also illustrated. Some practical issues that need to be settled as part of any implementation have not yet been clearly defined. Some of these issues are listed, and some opinions on the subjects are given. Finally, two practical early implementations of what are presently called 'application services' are described.<<ETX>>","PeriodicalId":126008,"journal":{"name":"IEEE International Conference on Communications, Including Supercomm Technical Sessions","volume":"176 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124359044","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: 0
The performance of a FH/MFSK link in a Poisson field of interferers 在泊松干扰场中FH/MFSK链路的性能
IEEE International Conference on Communications, Including Supercomm Technical Sessions Pub Date : 1990-04-16 DOI: 10.1109/ICC.1990.117270
E. Sousa
{"title":"The performance of a FH/MFSK link in a Poisson field of interferers","authors":"E. Sousa","doi":"10.1109/ICC.1990.117270","DOIUrl":"https://doi.org/10.1109/ICC.1990.117270","url":null,"abstract":"Results on the modeling of interference in a radio communication network are presented, and performance measures for the link are given as a function of the distance for frequency hopping with M-ary frequency shift keying (FH/MFSK). It is assumed that a transmitter-receiver pair in a radio network is affected by a set of interferers, whose positions are modeled as a Poisson field in the plane. Assuming a 1/r/sup 4/ propagation power loss law, the probability of symbol error and the link capacity as a function of the distance between the transmitter and receiver are obtained. It is found that the symbol error probability is not dependent on the synchronization of the hopping times of the different users.<<ETX>>","PeriodicalId":126008,"journal":{"name":"IEEE International Conference on Communications, Including Supercomm Technical Sessions","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114923395","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
Passive shared media systems 被动式共享媒体系统
IEEE International Conference on Communications, Including Supercomm Technical Sessions Pub Date : 1990-04-16 DOI: 10.1109/ICC.1990.117249
P. Prucnal, P. Perrier
{"title":"Passive shared media systems","authors":"P. Prucnal, P. Perrier","doi":"10.1109/ICC.1990.117249","DOIUrl":"https://doi.org/10.1109/ICC.1990.117249","url":null,"abstract":"A passive shared media space-division photonic switching architecture with the potential for extremely high dimensionality is presented. The architecture, which resembles a collapsed network, eliminates the restrictions 2*2 switching elements impose in classical space-division switching architectures by providing a dedicated path for all input- and output-port connections on a common transmission medium. Switching between two input ports and three output ports of a space-division time-multiplexed photonic switch with 120*120 input/output port capacity was demonstrated. The aggregate throughput was 12 Gb/s.<<ETX>>","PeriodicalId":126008,"journal":{"name":"IEEE International Conference on Communications, Including Supercomm Technical Sessions","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116459885","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
Throughout estimation of ARQ protocols for Raleigh fading channel using fade- and interfade-duration statistics 基于衰落和间隔时间统计的罗利衰落信道ARQ协议的全程估计
IEEE International Conference on Communications, Including Supercomm Technical Sessions Pub Date : 1990-04-16 DOI: 10.1109/ICC.1990.117291
L. Chang
{"title":"Throughout estimation of ARQ protocols for Raleigh fading channel using fade- and interfade-duration statistics","authors":"L. Chang","doi":"10.1109/ICC.1990.117291","DOIUrl":"https://doi.org/10.1109/ICC.1990.117291","url":null,"abstract":"The throughput for a system using Go-Back-N or selective repeat protocols with Rayleigh fading in both directions of transmission is approximated by using fade- and interfade-duration statistics of a multipath channel. The retransmission for Go-Back-N is based on a time-out concept; for selective repeat it is based on either time-out or negative acknowledge. The estimated results on throughput agree well with simulation results. It is found that, for a slow fading channel (e.g. fading rate=1.34 Hz, encountered by a user at 1 mile/hr walking speed and 900-MHz carrier frequency), the throughput of Go-Back-N is only slightly inferior. This comparatively equal performance results from the burstiness of the channel bit errors. On the other hand, for a fast fading channel (e.g. fading rate=80 Hz), the throughput using selective repeat is significantly superior.<<ETX>>","PeriodicalId":126008,"journal":{"name":"IEEE International Conference on Communications, Including Supercomm Technical Sessions","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123543523","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
Communication reliability improvement for WSI array processors WSI阵列处理器通信可靠性改进
IEEE International Conference on Communications, Including Supercomm Technical Sessions Pub Date : 1990-04-16 DOI: 10.1109/ICC.1990.117185
Jack S. N. Jean, S. Kung
{"title":"Communication reliability improvement for WSI array processors","authors":"Jack S. N. Jean, S. Kung","doi":"10.1109/ICC.1990.117185","DOIUrl":"https://doi.org/10.1109/ICC.1990.117185","url":null,"abstract":"A reconfiguration algorithm is proposed for two arrays, a one-and-half-track array and a two-and-half-track array. The algorithm considers a whole fault pattern all together and therefore makes no early blind decision. The reconfiguration algorithm can systematically enumerate all the placement possibilities and can handle the defects of switches/connections/wires by incorporating the restrictions into the contradiction graph. It is shown that much better array yield can be obtained for the two-and-half-track array. The one-and-half-track array, however, is still useful when run-time fault tolerance is considered.<<ETX>>","PeriodicalId":126008,"journal":{"name":"IEEE International Conference on Communications, Including Supercomm Technical Sessions","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128304146","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: 0
Jitter attenuation in T1 networks T1网络中的抖动衰减
IEEE International Conference on Communications, Including Supercomm Technical Sessions Pub Date : 1990-04-16 DOI: 10.1109/ICC.1990.117165
R. F. Bridge, S. Bily, J. Klass, R. Taylor
{"title":"Jitter attenuation in T1 networks","authors":"R. F. Bridge, S. Bily, J. Klass, R. Taylor","doi":"10.1109/ICC.1990.117165","DOIUrl":"https://doi.org/10.1109/ICC.1990.117165","url":null,"abstract":"The CS61574, a CMOS T1 line driver, clock recovery, and jitter-attenuator circuit is described. The jitter attenuator is an innovative mixed analog/digital circuit that consists of a 32-b FIFO and a capacitance-controlled crystal oscillator. The capacitance loading on the external crystal is digitally controlled by the CMOS circuitry to insure that the oscillator frequency matches the average incoming frequency of the recovered line signal. The FIFO buffers the incoming data, allowing the attenuator to provide up to 60 dB of attenuation of phase jitter. Unique attributes of this attenuator are the level of attenuation achieved, the absence of jitter aliasing, the absence of jitter peaking, and excellent jitter tolerance.<<ETX>>","PeriodicalId":126008,"journal":{"name":"IEEE International Conference on Communications, Including Supercomm Technical Sessions","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128413011","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
Real-time computer network performance analysis based on ISO/OSI transport service definition 基于ISO/OSI传输服务定义的实时计算机网络性能分析
IEEE International Conference on Communications, Including Supercomm Technical Sessions Pub Date : 1990-04-16 DOI: 10.1109/ICC.1990.117309
Y.B. Kim, A. Vacroux
{"title":"Real-time computer network performance analysis based on ISO/OSI transport service definition","authors":"Y.B. Kim, A. Vacroux","doi":"10.1109/ICC.1990.117309","DOIUrl":"https://doi.org/10.1109/ICC.1990.117309","url":null,"abstract":"A unified approach focuses on estimation of statistical parameters at the transport service access points from the states and transitions of the service endpoints in the transport layer. Unlike previous methods, this approach emphasizes simplicity, efficiency, and the possibility of real-time analysis. Other possible applications of this concept are discussed, e.g. timer value assignment, end-to-end global rate or throughput control. On the basis of the proposed concept, much more sophisticated real implementations, in end-to-end bases, could be considered for existing computer networks and for future open systems and integrated services.<<ETX>>","PeriodicalId":126008,"journal":{"name":"IEEE International Conference on Communications, Including Supercomm Technical Sessions","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128202345","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
A new approach for the analysis of the slotted Aloha local packet radio networks 一种分析开槽Aloha本地分组无线网的新方法
IEEE International Conference on Communications, Including Supercomm Technical Sessions Pub Date : 1990-04-16 DOI: 10.1109/ICC.1990.117267
K. Zhang, K. Pahlavan
{"title":"A new approach for the analysis of the slotted Aloha local packet radio networks","authors":"K. Zhang, K. Pahlavan","doi":"10.1109/ICC.1990.117267","DOIUrl":"https://doi.org/10.1109/ICC.1990.117267","url":null,"abstract":"A novel method for the exact calculation of the throughput of a centralized slotted Aloha packet radio network over slow Rayleigh-fading channels is presented, and the results are compared with computer simulations. Upper and lower bounds on the performance are provided. The effects of capture on the throughput of the system are related to the modulation and coding technique, the signal-to-noise ratio of the received signal, the general terminal distribution in the area, and the length of the transmitted packets. BPSK (binary phase shift keying), coherent and noncoherent binary FSK (frequency shift keying) modulations, and BCH coding are considered for the exact calculations. The results of the analysis show that the maximum average throughput of the slotted Aloha packet radio network is around 60%, rather than the 36% predicted from the simplified analysis. In contrast with previous reports, it is shown that the throughput of the system is not affected significantly by the use of coding or the change of packet lengths.<<ETX>>","PeriodicalId":126008,"journal":{"name":"IEEE International Conference on Communications, Including Supercomm Technical Sessions","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129322836","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
Channel reuse multiple access protocol for bidirectional bus networks 双向总线网络信道复用多址协议
IEEE International Conference on Communications, Including Supercomm Technical Sessions Pub Date : 1990-04-16 DOI: 10.1109/ICC.1990.117352
W. C. Lee, P. Humblet
{"title":"Channel reuse multiple access protocol for bidirectional bus networks","authors":"W. C. Lee, P. Humblet","doi":"10.1109/ICC.1990.117352","DOIUrl":"https://doi.org/10.1109/ICC.1990.117352","url":null,"abstract":"A novel contention-free multiple-access protocol for bidirectional-passive bus packet networks is proposed. One version has a simple fixed-assignment transmission scheduling similar to that of the time-division multiple-access protocol, except that left-going and right-going packets may be transmitted only in alternate rounds. Another version employs a simple reservation scheme to provide demand-assignment transmission scheduling. In either instance the protocol may offer a maximum throughput exceeding one packet per packet transmission time under appropriate conditions, where throughput is defined as the number of distinct packets transmitted successfully per packet transmission time. This is possible through channel reuse as explained.<<ETX>>","PeriodicalId":126008,"journal":{"name":"IEEE International Conference on Communications, Including Supercomm Technical Sessions","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130178119","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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