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dc.contributor.authorChang, PRen_US
dc.contributor.authorWang, BCen_US
dc.date.accessioned2014-12-08T15:02:12Z-
dc.date.available2014-12-08T15:02:12Z-
dc.date.issued1996-12-01en_US
dc.identifier.issn0733-8716en_US
dc.identifier.urihttp://dx.doi.org/10.1109/49.545704en_US
dc.identifier.urihttp://hdl.handle.net/11536/893-
dc.description.abstractIn this article, we investigate the use of fuzzy logic control techniques for adaptive power control in a direct-sequence code-division multiple-access (DS/CDMA) cellular system over the mobile fading radio channels with propagation time delay, A fuzzy PI (proportional-plus-integral) control whose input variables are the received power error and error change is introduced to determine each user transmitting power in order to simultaneously equalize all users' signal powers received at the base station and achieve better System stability and control performance, This control strategy can ensure long loop transmission delays without causing the system to become unstable, According to the well-known phase-plane method, the derivation of the fuzzy PI control has been carried out by analyzing the response areas, cross-over, and extreme points of the system step response with apriori knowledge of the dynamics of the CDMA mobile fading channels, For a long time-delay fading process, a methodology is developed to modify the rule base to contain the delay information for reducing the deadtime effects of the process, Moreover, the additional advantages of fuzzy PI control over conventional control theories are: increased robustness in spite of interference and the ability to handle the time-delay process whose parameters are not accurately known, Simulation results show that a good performance can he achieved both in rms tracking error and traffic capacity by use of fuzzy PI power control, especially in poor interuser interference and long time delay conditions.en_US
dc.language.isoen_USen_US
dc.titleAdaptive fuzzy proportional integral power control for a cellular CDMA system with time delayen_US
dc.typeArticleen_US
dc.identifier.doi10.1109/49.545704en_US
dc.identifier.journalIEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONSen_US
dc.citation.volume14en_US
dc.citation.issue9en_US
dc.citation.spage1818en_US
dc.citation.epage1829en_US
dc.contributor.department交大名義發表zh_TW
dc.contributor.department電信工程研究所zh_TW
dc.contributor.departmentNational Chiao Tung Universityen_US
dc.contributor.departmentInstitute of Communications Engineeringen_US
dc.identifier.wosnumberWOS:A1996VX46200015-
dc.citation.woscount25-
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