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Titolo:
On the capacity of cellular DS/CDMA systems under slow Rician/Rayleigh-fading channels
Autore:
Hashem, B; Sousa, ES;
Indirizzi:
Univ Toronto, Dept Elect & Comp Engn, Toronto, ON M5S 3G4, Canada Univ Toronto Toronto ON Canada M5S 3G4 Engn, Toronto, ON M5S 3G4, Canada
Titolo Testata:
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
fascicolo: 5, volume: 49, anno: 2000,
pagine: 1752 - 1759
SICI:
0018-9545(200009)49:5<1752:OTCOCD>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
MOBILE RADIO SYSTEMS; INTERFERENCE STATISTICS; POWER-CONTROL; CDMA SYSTEM;
Keywords:
code division multiple access (CDMA); interference statistics; IS-95; power control; reverse link capacity; Rician/Rayleigh channels;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
10
Recensione:
Indirizzi per estratti:
Indirizzo: Hashem, B Nortel Networks, Adv Technol Lab, Ottawa, ON K1Y 4H7, Canada Nortel Networks Ottawa ON Canada K1Y 4H7 wa, ON K1Y 4H7, Canada
Citazione:
B. Hashem e E.S. Sousa, "On the capacity of cellular DS/CDMA systems under slow Rician/Rayleigh-fading channels", IEEE VEH T, 49(5), 2000, pp. 1752-1759

Abstract

Power control is essential for code-division multiple-access (CDMA) cellular systems to overcome the near-far problem. Fast power control tracks multipath fading perfectly which increases the intercell interference and thus reduces the capacity, If there is a line of sight (LOS) component between the mobile and the base station with which it is communicating, the fading will be of Rician type and less deep fades will be encountered which reducesthe intercell interference. In this paper, we investigate the system capacity assuming the fading between a mobile and the base station with which itis communicating to be Rician with a Rician factor K while the fading between the same mobile and other base stations to be Rayleigh. We show a largeincrease in the capacity even for small Rician factors. A Rician fading isusually encountered when the mobile is close to the base station and thus the path-loss exponent can be less than four. Thus, we investigate the effect of changing the path-loss exponent value on the system capacity. Finally, we reduce the intercell interference by imposing a limit on the maximum increase in power to compensate for multipath fading and show how can this increase the capacity by more than 100%.

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Documento generato il 06/07/20 alle ore 05:57:58