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[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications最新文献

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Timing recovery techniques for digital cellular radio with pi /4-DQPSK modulation pi /4-DQPSK调制数字蜂窝无线电的定时恢复技术
[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications Pub Date : 1992-06-14 DOI: 10.1109/ICC.1992.268240
Ging-Shing Liu, Che-Ho Wei
{"title":"Timing recovery techniques for digital cellular radio with pi /4-DQPSK modulation","authors":"Ging-Shing Liu, Che-Ho Wei","doi":"10.1109/ICC.1992.268240","DOIUrl":"https://doi.org/10.1109/ICC.1992.268240","url":null,"abstract":"A class of timing recovery techniques for pi /4-differential quadrature phase shift keying (DQPSK) signals in digital cellular systems is studied. The timing recovery techniques are composed of a zero-memory nonlinear device and a narrowband bandpass filter or a phase-locked loop which is tuned to the clock rate. These timing recovery schemes are evaluated at IF-band in Rayleigh fading channels. The jitter performances over static and dynamic channels were simulated and are compared. From the simulation results, it is found that the class of timing recovery techniques is insensitive to the fading effect.<<ETX>>","PeriodicalId":170618,"journal":{"name":"[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132788500","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
Upstream-FDMA/downstream-TDM optical fiber multiaccess network 上行- fdma /下行- tdm光纤多址网络
[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications Pub Date : 1992-06-14 DOI: 10.1109/ICC.1992.268280
T. Shiozawa, M. Shibutani, J. Namiki
{"title":"Upstream-FDMA/downstream-TDM optical fiber multiaccess network","authors":"T. Shiozawa, M. Shibutani, J. Namiki","doi":"10.1109/ICC.1992.268280","DOIUrl":"https://doi.org/10.1109/ICC.1992.268280","url":null,"abstract":"The upstream-frequency-division-multiple access/downstream-time-division multiplexing (UFDMA/DTDM) optical multiaccess network is discussed. The system design for the proposed network is outlined. In this network, superluminescent diodes, which have a wide optical spectrum linewidth, are used as transmitter light sources in the network terminators to avoid optical beat interference. The carrier to noise ratio (CNR) and the dispersion power penalty are calculated to determine the channel capacity. For example, in the 1.5 mu m wavelength region. 800 Mb/s downstream channel capacity and 1.5 Mb/s upstream channel capacity are applicable for 32 network terminators and a 10 km optical fiber.<<ETX>>","PeriodicalId":170618,"journal":{"name":"[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications","volume":"122 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133292638","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
Optimal feedforward estimation of frequency-selective fading, radio channels using statistical channel information 频率选择性衰落的最优前馈估计，利用统计信道信息的无线电信道
[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications Pub Date : 1992-06-14 DOI: 10.1109/ICC.1992.268197
S. Fechtel, H. Meyr
{"title":"Optimal feedforward estimation of frequency-selective fading, radio channels using statistical channel information","authors":"S. Fechtel, H. Meyr","doi":"10.1109/ICC.1992.268197","DOIUrl":"https://doi.org/10.1109/ICC.1992.268197","url":null,"abstract":"The optimal feedforward channel estimator relying only on known training symbols is systematically derived. Statistical channel information is assumed to be available. The resulting estimator is shown to decompose into the two subtasks of maximum likelihood (ML) acquisition and subsequent Wiener filtering. When using optimal training sequences, the corresponding channel estimator becomes very efficient and flexible. A design example of a near-optimal HF channel estimator is presented and its performance was verified by simulation. Bit error rate simulation results of an entire near-optimal maximum likelihood sequence estimation (MLSE) receiver employing feedforward synchronization demonstrate the superiority and robustness of Wiener channel estimation.<<ETX>>","PeriodicalId":170618,"journal":{"name":"[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134554862","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: 11
Access to a network channel: a survey into the unfairness problem 接入网络渠道:不公平问题调查
[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications Pub Date : 1992-06-14 DOI: 10.1109/ICC.1992.268128
C. Douligeris, L. N. Kumar
{"title":"Access to a network channel: a survey into the unfairness problem","authors":"C. Douligeris, L. N. Kumar","doi":"10.1109/ICC.1992.268128","DOIUrl":"https://doi.org/10.1109/ICC.1992.268128","url":null,"abstract":"Network users and designers are frequently concerned about the fairness of service achieved either in the local network or in internetworking. The authors compile the basic issues, notions, and definitions of fairness in both the internetworking and intranetworking contexts from the available literature. The optimization schemes that ensure fairness and the criteria used for such optimization, as available in the internetworking literature, are discussed. In the intranetworking environment, delay and throughput are often used as the fairness parameters. Often the approach to fairness entirely depends on the protocol implementation, and hence fairness criteria should be uniquely identified for each protocol.<<ETX>>","PeriodicalId":170618,"journal":{"name":"[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications","volume":"78 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114042892","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: 18
A look at the traffic characteristics of the first broadband service 看看第一个宽带业务的流量特征
[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications Pub Date : 1992-06-14 DOI: 10.1109/ICC.1992.267944
G. C. Hudek
{"title":"A look at the traffic characteristics of the first broadband service","authors":"G. C. Hudek","doi":"10.1109/ICC.1992.267944","DOIUrl":"https://doi.org/10.1109/ICC.1992.267944","url":null,"abstract":"The traffic characteristics of the switched multi-megabit data service (SMDS) are examined. SMDS is a connectionless public packet switched service which will be available initially at DS1 (1.544 Mb/s) and DS3 (44.736 Mb/s) rates, and later at OCn rates. Results of a technology test on an SMDS network that carried many different types of applications ranging from LAN-type data traffic to medical imaging are presented. The characteristics of the traffic on this SMDS network are reviewed. Using these traffic data, several important characteristics for SMDS and broadband traffic in general are identified.<<ETX>>","PeriodicalId":170618,"journal":{"name":"[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114235982","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
BER performance of continuous phase digital angle modulation in aeronautical mobile radio channels 航空移动无线电信道中连续相位数字角度调制的误码率性能
[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications Pub Date : 1992-06-14 DOI: 10.1109/ICC.1992.268085
S. Elnoubi
{"title":"BER performance of continuous phase digital angle modulation in aeronautical mobile radio channels","authors":"S. Elnoubi","doi":"10.1109/ICC.1992.268085","DOIUrl":"https://doi.org/10.1109/ICC.1992.268085","url":null,"abstract":"The bit error rate (BER) performance of continuous phase digital angle modulation is theoretically analyzed in the aeronautical mobile radio channel by applying the Pawula theorem to the channel stochastic model that was developed by the author (42nd IEEE Veh. Technol. Conf., 1992). These digital angle modulation techniques include M-ary frequency shift keying (FSK), M-ary differential phase shift keying (DPSK), and constant envelope partial response continuous-phase modulation (PRCPM) techniques such as Gaussian minimum shift keying (GMSK). The BER results show that multipath fading and Doppler shifts in the aeronautical mobile radio channel degrade the probability of error.<<ETX>>","PeriodicalId":170618,"journal":{"name":"[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114599765","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
Equalization of pi /4 offset DQPSK transmitted over flat fading channels 在平坦衰落信道上传输的pi /4偏置DQPSK的均衡
[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications Pub Date : 1992-06-14 DOI: 10.1109/ICC.1992.268245
M. Fattouche, H. Zaghloul
{"title":"Equalization of pi /4 offset DQPSK transmitted over flat fading channels","authors":"M. Fattouche, H. Zaghloul","doi":"10.1109/ICC.1992.268245","DOIUrl":"https://doi.org/10.1109/ICC.1992.268245","url":null,"abstract":"The authors propose an algorithm for an equalizer/demodulator to minimize the effects of the propagation channel on pi /4 offset differential quadrature phase shift keying (DQPSK) modulated symbols transmitted over a flat fading channel. The proposed equalizer/demodulator takes as input the in-phase and quadrature samples of the received signal and outputs the corresponding decoded bits. The equalizer uses a Hilbert transform to estimate the absolute value of the phase differential of the carrier from the envelope of the carrier. This is demonstrated on a mobile radio channel.<<ETX>>","PeriodicalId":170618,"journal":{"name":"[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115930559","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
Comparative performance evaluation of sector antenna and DFE systems in indoor radio channels 扇形天线与DFE系统在室内无线电信道中的性能比较
[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications Pub Date : 1992-06-14 DOI: 10.1109/ICC.1992.268045
G. Yang, K. Pahlavan
{"title":"Comparative performance evaluation of sector antenna and DFE systems in indoor radio channels","authors":"G. Yang, K. Pahlavan","doi":"10.1109/ICC.1992.268045","DOIUrl":"https://doi.org/10.1109/ICC.1992.268045","url":null,"abstract":"A deterministic model for indoor radio propagation that is suitable for analyzing the performances of sector antenna systems in indoor radio channels is presented. This model considers the direct line of sight path and the paths arrived through reflections from the walls to determine all the existing paths between the transmitter and receiver. Using this model, the outage probabilities of binary phase shift keying (BPSK) and BPSK/DFE (decision feedback equalizer) radio modems with omnidirectional and six-sector antennas operating in the same room are compared. The effects of room size, data rate, transmitted power, and sector antenna patterns on the performances of the systems are analyzed.<<ETX>>","PeriodicalId":170618,"journal":{"name":"[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications","volume":"191 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121736825","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
Solving bandwidth and priority domination problems of DQDB metropolitan area networks 解决DQDB城域网的带宽和优先级控制问题
[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications Pub Date : 1992-06-14 DOI: 10.1109/ICC.1992.268143
N.-F. Huang, S.-T. Sheu
{"title":"Solving bandwidth and priority domination problems of DQDB metropolitan area networks","authors":"N.-F. Huang, S.-T. Sheu","doi":"10.1109/ICC.1992.268143","DOIUrl":"https://doi.org/10.1109/ICC.1992.268143","url":null,"abstract":"The bandwidth domination problem (BDP) in the distributed queue dual bus (DQDB) medium access control (MAC) protocol could occur if the network bandwidth is dominated by a single node when it is active early and other nodes having heavy traffic demands are active later. The priority domination problem (PDP) is the problem that the network bandwidth may be dominated by an upstream node with lower priority when it is active early and other nodes with higher priorities are active later. To solve the BDP a mechanism is provided such that the bandwidth can be shared among all active nodes. To solve the PDP a mechanism is provided such that nodes with higher priority can capture all the bandwidth. The authors propose two adaptive algorithms to solve the BDP and a priority mechanism to solve the PDP. The adaptive algorithms and priority mechanism were evaluated by simulation. It is also shown that if the adaptive algorithms and priority mechanism are combined together, then the nodes with highest priority can use all the bandwidth and the bandwidth can be balanced among these nodes rapidly.<<ETX>>","PeriodicalId":170618,"journal":{"name":"[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121570295","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
Queueing model of gateways with packet fragmentation 分组分片网关的排队模型
[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications Pub Date : 1992-06-14 DOI: 10.1109/ICC.1992.268100
Jianli Wang, Y. Fan, Chuan Wang
{"title":"Queueing model of gateways with packet fragmentation","authors":"Jianli Wang, Y. Fan, Chuan Wang","doi":"10.1109/ICC.1992.268100","DOIUrl":"https://doi.org/10.1109/ICC.1992.268100","url":null,"abstract":"A switched determined process (SDP) is proposed as a modeling tool for the packet arrival process of the output queue of gateways with packet fragmentation. A new method called the minislot method is proposed for performance analysis of the SDP/S/1 queue by using an embedded Markov chain technique and a supplementary variable technique. The iterative formulas for queue length distribution of SDP/D/1 are derived. The expressions for waiting time distribution and scan delay of the SDP/D/1 queue are then obtained. The numerical results are given.<<ETX>>","PeriodicalId":170618,"journal":{"name":"[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122545167","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
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