IEEE Second Symposium on Communications and Vehicular Technology in the Benelux最新文献

Multi-h CPM with post-detection diversity for satellite mobile communication systems 具有探测后分集的多小时CPM卫星移动通信系统

IEEE Second Symposium on Communications and Vehicular Technology in the Benelux Pub Date : 1994-11-02 DOI: 10.1109/SCVT.1994.574159

A. Rodrigues, A. A. Albuquerque

引用次数: 0

Performance analysis of a FH-SSMA system FH-SSMA系统性能分析

IEEE Second Symposium on Communications and Vehicular Technology in the Benelux Pub Date : 1994-11-02 DOI: 10.1109/SCVT.1994.574148

J.-L. Niezette, L. Deneire, A. Fawe

引用次数: 0

Comparison of two phase models in indoor radio propagation channels 室内无线电传播信道中两相位模型的比较

IEEE Second Symposium on Communications and Vehicular Technology in the Benelux Pub Date : 1994-11-02 DOI: 10.1109/SCVT.1994.574142

H. Nikookar

{"title":"Comparison of two phase models in indoor radio propagation channels","authors":"H. Nikookar","doi":"10.1109/SCVT.1994.574142","DOIUrl":"https://doi.org/10.1109/SCVT.1994.574142","url":null,"abstract":"In this paper two phase models of indoor radio propagation channels (i.e. deterministic and random phase increments) are compared. In the deterministic phase model (model I), phase is updated deterministically using several independent random scatterers for each multipath component. In the random phase model (model II), phase of each multipath updates with independent random increments. Statistical characteristics of phase increments of model I are studied, simulated and compared with model II. Major results of this investigation are: (i) phase increments of model I are normally distributed with non-zero mean; (ii) mean of phase increments of model I decreases with increasing excess delay, increases with increasing antenna separation, slightly increases with increasing the number of scatterers and is nearly independent of the profile number; (iii) standard deviation of phase increments of model I changes with position of portable and after a displacement of one wavelength is nearly independent of profile number, and slightly increases with the number of scatterers. Comparison of these two models from computational complexity is carried out. It is shown that with two scatterers of model I, both methods have the same performance, and with more scatterers the random phase increment model is more efficient than the deterministic phase increment model. The results of this investigation can be used in design and performance evaluation of indoor wireless communication systems.","PeriodicalId":236384,"journal":{"name":"IEEE Second Symposium on Communications and Vehicular Technology in the Benelux","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134600942","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

Space diversity for GSM channels: comparison of performance GSM信道的空间分集:性能比较

IEEE Second Symposium on Communications and Vehicular Technology in the Benelux Pub Date : 1994-11-02 DOI: 10.1109/SCVT.1994.574157

O. van de Wiel, L. Vandendorpe

引用次数: 1

Automated verification of LAN protocols: a case study 局域网协议的自动验证:一个案例研究

IEEE Second Symposium on Communications and Vehicular Technology in the Benelux Pub Date : 1994-11-02 DOI: 10.1109/SCVT.1994.574155

I. Voet

引用次数: 0

Simulation results on MM-wave indoor radio channel modelling and comparison with measurements 毫米波室内无线信道建模的仿真结果及与实测结果的比较

IEEE Second Symposium on Communications and Vehicular Technology in the Benelux Pub Date : 1994-11-02 DOI: 10.1109/SCVT.1994.574149

J. Fernandes, P. Smulders, J. Neves

引用次数: 5

Distance based dynamic adaptation of the air interface in TDMA TDMA中基于距离的空中接口动态自适应

IEEE Second Symposium on Communications and Vehicular Technology in the Benelux Pub Date : 1994-11-02 DOI: 10.1109/SCVT.1994.574167

E. Le Strat, A. Wantier

{"title":"Distance based dynamic adaptation of the air interface in TDMA","authors":"E. Le Strat, A. Wantier","doi":"10.1109/SCVT.1994.574167","DOIUrl":"https://doi.org/10.1109/SCVT.1994.574167","url":null,"abstract":"In a mobile radio environment, propagation and interference conditions experienced by a mobile are time-varying. The air interface is usually fixed and designed for the worst case. The paper proposes to dynamically select the air interface parameters from a set of predefined combinations known as transport modes. Modes are ordered according to their robustness towards channel errors. They correspond to the transmission of a variable net and/or gross bit rate leading to a possibly variable allocated resource. The proposed modes selection algorithm is based on the transmitter receiver distance separation. It results in a mode utilisation in concentric rings, a more robust mode being used at the cell border and a less robust mode at the cell center. The reasoning is that a mode should not be selected according to the channel quality experienced in the recent past due to the very rapid changing propagation and traffic load conditions particularly in a packet access system. The mode selection is performed with respect to the conditions that will be statistically encountered with a high probability, the statistics being gathered with respect to the mobile station -base station distance. The interworking of the algorithm with various power control strategies is studied. The adjustment of the rings' radii in order to achieve the best trade-off between the service quality, the cell capacity and the transmit power is addressed. Simulation results are finally presented.","PeriodicalId":236384,"journal":{"name":"IEEE Second Symposium on Communications and Vehicular Technology in the Benelux","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131883815","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

OFDM encoding with reduced crestfactor 减少波峰因子的OFDM编码

IEEE Second Symposium on Communications and Vehicular Technology in the Benelux Pub Date : 1994-11-02 DOI: 10.1109/SCVT.1994.574162

A. Kamerman, A. Krishnakumar

{"title":"OFDM encoding with reduced crestfactor","authors":"A. Kamerman, A. Krishnakumar","doi":"10.1109/SCVT.1994.574162","DOIUrl":"https://doi.org/10.1109/SCVT.1994.574162","url":null,"abstract":"Orthogonal Frequency Division Multiplexing (OFDM) has been proposed for future high speed wireless LANs and digital (television and audio) broadcasting as a promising multicarrier modulation technique. OFDM offers robustness against significant channel degradation by dispersion. For wireless LANs, the design of the transmitter power amplifier and the characteristics of the modulated signal are key factors deciding the coverage range performance and the product cost. The peak-envelope-power of the transmitter power amplifier is an important parameter in the design of small sized, low power wireless LAN devices. This paper describes an OFDM system with a data encoder/decoder that improves the peak-to-average power ratio of the transmitted signal. In this scheme, the data to be transmitted is converted into symbols for the individual subcarriers, such that the resultant of a pair of symmetrically positioned subcarriers is orthogonal to the resultant of another pair of subcarriers with the same center of symmetry. This conversion gives a reduced ratio between peak envelope-power and the mean (RMS) power, which reduces constraints on the power stage design. Further, the impact on the bit-error rate of clipping the signal in the transmitter before the output amplifier is discussed.","PeriodicalId":236384,"journal":{"name":"IEEE Second Symposium on Communications and Vehicular Technology in the Benelux","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129413265","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

HEMT MMIC-circuits for millimetre-wave telecommunications systems 毫米波通信系统用HEMT mmic电路

IEEE Second Symposium on Communications and Vehicular Technology in the Benelux Pub Date : 1994-11-02 DOI: 10.1109/SCVT.1994.574152

Y. Baeyens, D. Schreurs, B. Nauwelaers, W. De Raedt, M. Van Hove, M. Van Rossum

引用次数: 1

Performance of optimum and suboptimum multiuser detection in DS-CDMA mobile radio systems in multipath channels 多径信道下DS-CDMA移动无线电系统的最优和次最优多用户检测性能

IEEE Second Symposium on Communications and Vehicular Technology in the Benelux Pub Date : 1994-11-02 DOI: 10.1109/SCVT.1994.574147

J. Hess, M. Reinhardt, J. Lindner, M. Bossert, A. Donder, M. Beck

引用次数: 9