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Non-regenerative on-board processing for multi-beam mobile satellite systems 多波束移动卫星系统的非再生星上处理
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13621
F. Ananasso, F. D. Priscoli
{"title":"Non-regenerative on-board processing for multi-beam mobile satellite systems","authors":"F. Ananasso, F. D. Priscoli","doi":"10.1109/ICC.1988.13621","DOIUrl":"https://doi.org/10.1109/ICC.1988.13621","url":null,"abstract":"The authors deal with a transparent repeater approach to onboard processing (OBP), utilizing satellite-switched frequency-division multiple access (SS-FDMA) to the satellite. Some relevant architectural issues are addressed regarding system reconfigurability, and relevant onboard technologies to implement the SS-FDMA router are indicated.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128711535","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
A digital synchronizer for linearly modulated signals transmitted over a frequency-nonselective fading channel 一种用于在频率非选择性衰落信道上传输的线性调制信号的数字同步器
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13709
R. Haeb, H. Meyr
{"title":"A digital synchronizer for linearly modulated signals transmitted over a frequency-nonselective fading channel","authors":"R. Haeb, H. Meyr","doi":"10.1109/ICC.1988.13709","DOIUrl":"https://doi.org/10.1109/ICC.1988.13709","url":null,"abstract":"A digital carrier recovery structure which allows coherent detection on frequency-nonselective fading channels is presented. The synchronizer estimates the multiplicative distortion introduced by the channel. It is shown that the structure is superior to a phase-locked loop and is well suited for a fully digital realization. A detailed synchronizer design and simulation results are presented for a land-mobile radio channel. This includes a novel scheme for a fully digital frequency offset estimation and correction.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128736034","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
Unified network management architecture (UNMA) 统一网管架构(UNMA)
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13731
J. Brinsfield
{"title":"Unified network management architecture (UNMA)","authors":"J. Brinsfield","doi":"10.1109/ICC.1988.13731","DOIUrl":"https://doi.org/10.1109/ICC.1988.13731","url":null,"abstract":"The scope of UNMA (unified network management architecture) is discussed in order to give an understanding of the customer domains for which the architecture is applicable. The generic architecture is described, including concrete information on the associated network management protocol. The architecture includes an integrated network management system that provides a broad range of functions from end to end across a network. These functional areas are explained, including feature examples. The benefits and flexibility of the protocol and architecture are delineated.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127457377","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
Study of packet loss in a packet switched voice system 分组交换语音系统中丢包的研究
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13803
S.-q. Li
{"title":"Study of packet loss in a packet switched voice system","authors":"S.-q. Li","doi":"10.1109/ICC.1988.13803","DOIUrl":"https://doi.org/10.1109/ICC.1988.13803","url":null,"abstract":"A study is presented of the temporal behavior of packet loss on a voice-transmitted TDM time-division multiplexed link. The mean duration is given of blocking and nonblocking periods, the variance of blocking periods, and the expected packet. The loss rate within blocking periods is derived. These measures are extended to characterize the performance of packet loss at various rates. The results provide significant information on voice packet loss and can be directly applied to the design of packet-switched voice systems. The packet loss rate in a voice system changes slowly and has large fluctuations. This temporal behavior of packet loss, especially at high rates, is basically characterized by voice correlation and system capacity. Increasing the buffer size merely extends the nonblocking periods and thereby reduces the overall average packet-loss-rate. Once a blocking period occurs, however, the length of this period as well as the behavior of packet loss within the period becomes irrelevant to the buffer size. Based on this observation, a simple tool is developed to evaluate the boundary performance of packet loss at various rates; it is especially accurate at high rates.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128947991","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: 13
A sequential decoder for differential detection of trellis coded PSK signals 一种用于栅格编码PSK信号差分检测的顺序解码器
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13785
D. Makrakis, A. Yongaçoğlu, K. Feher
{"title":"A sequential decoder for differential detection of trellis coded PSK signals","authors":"D. Makrakis, A. Yongaçoğlu, K. Feher","doi":"10.1109/ICC.1988.13785","DOIUrl":"https://doi.org/10.1109/ICC.1988.13785","url":null,"abstract":"A soft-decision sequential decoder is presented for the differential detection of the trellis-coded phase-shift keyed (PSK) signal. The decoder is based on use of the redundancy introduced by the differential encoder. This is done by joint utilization of several differential detectors. The performance of the decoder is evaluated using the trellis-coded 4-PSK and 8-PSK schemes. Simulation results indicate that for Gaussian and Rician channels, the sequential decoder provides significant performance improvements.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"54 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132496669","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
System performance implications of laser chirp for long haul high bit rate direct detection optical fibre communications 激光啁啾对长距离高比特率直接检测光纤通信系统性能的影响
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13632
H. da Silva, J. O'Reilly
{"title":"System performance implications of laser chirp for long haul high bit rate direct detection optical fibre communications","authors":"H. da Silva, J. O'Reilly","doi":"10.1109/ICC.1988.13632","DOIUrl":"https://doi.org/10.1109/ICC.1988.13632","url":null,"abstract":"Long-distance high-data-rate systems can be impaired by interactions between laser wavelength chirp and the generally nonzero chromatic dispersion of monomode fibers. Strategies suitable for estimating the chirp-induced power penalty in direct detection optical fiber systems are outlined. A SPICE2 equivalent circuit model of a single-frequency laser diode is used to obtain light intensity and wavelength chirp profiles for representative data sequences. These are used together with two computer-based models for chirp dispersion interaction, which produce similar results for the range of values considered. Good agreement is obtained with reported experimental power penalties.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130826903","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
Adaptive identification of dispersive nonlinear data transmission channels 色散非线性数据传输信道的自适应辨识
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13696
M. Korenberg, P.H. Wittke
{"title":"Adaptive identification of dispersive nonlinear data transmission channels","authors":"M. Korenberg, P.H. Wittke","doi":"10.1109/ICC.1988.13696","DOIUrl":"https://doi.org/10.1109/ICC.1988.13696","url":null,"abstract":"An orthogonal algorithm is presented for adaptively modeling dispersive nonlinear channels encountered in data transmission. One application is in the adaptive cancellation of nonlinear intersymbol interference for voiceband data transmission. The model, which is in the form of a nonlinear difference equation, can be rapidly identified and routinely updated as new input-output points become available. In addition, the algorithm includes a fast orthogonal search for significant terms to be incorporated in the model.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127868955","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: 2
An approach to a high throughput matricial packet switch 一种实现高吞吐量材料分组交换机的方法
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13635
P.J. Lizcano, P.L. Chas, J. Jiménez
{"title":"An approach to a high throughput matricial packet switch","authors":"P.J. Lizcano, P.L. Chas, J. Jiménez","doi":"10.1109/ICC.1988.13635","DOIUrl":"https://doi.org/10.1109/ICC.1988.13635","url":null,"abstract":"A fully-hardware-based packet switch design is presented. The main features of its architecture are the nonblocking and noncontention basis of its implementation, which provides a high throughput capability and a low (and limited for all traffic situations) internal time delay. The approach used for this system assumes the development of several custom ICs which perform simple packet processing algorithms, embedded in hardware, and also takes advantage of the fast static memories now on the market. This fast switching system functions in a highly parallel processing way, and is well suited to support voice and data integration.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129252940","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
A new bounding procedure for the network reliability problem 网络可靠性问题的一种新的边界处理方法
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13651
C. Suffel
{"title":"A new bounding procedure for the network reliability problem","authors":"C. Suffel","doi":"10.1109/ICC.1988.13651","DOIUrl":"https://doi.org/10.1109/ICC.1988.13651","url":null,"abstract":"A description is given of a way to obtain bounds which will be tight over the class of networks for all possible values of the edge failure rate. These bounds have been shown to be valid for a certain range of edge failure rates. The author discusses the known bounding methods before proposing the new approach.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126630947","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
Variable bit rate modulo-PCM using adaptive predictor 使用自适应预测器的可变比特率模数pcm
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13644
K. Mizui, M. Hagiwara, M. Nakagawa
{"title":"Variable bit rate modulo-PCM using adaptive predictor","authors":"K. Mizui, M. Hagiwara, M. Nakagawa","doi":"10.1109/ICC.1988.13644","DOIUrl":"https://doi.org/10.1109/ICC.1988.13644","url":null,"abstract":"The authors propose an improved variable bit rate modulo-PCM (VBR-MPCM). It has the same performance as conventional VBR-MPCM, but it has lower complexity and shorter time delay. The authors also propose variable bit rate modulo-PCM using adaptive predictor (VBR-MPCM-AP) which differs in that it has an adaptive rather than fixed predictor. Its performance is about 0-3 dB better than that of improved VBR-MPCM.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114151583","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: 2
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