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Titolo:
System capacity of F-TDMA cellular systems
Autore:
Caire, G; Knopp, R; Humblet, P;
Indirizzi:
Politecn Turin, I-10129 Turin, Italy Politecn Turin Turin Italy I-10129Politecn Turin, I-10129 Turin, Italy Inst Eurecom, Mobile Commun Grp, F-06904 Sophia Antipolis, France Inst Eurecom Sophia Antipolis France F-06904 04 Sophia Antipolis, France
Titolo Testata:
IEEE TRANSACTIONS ON COMMUNICATIONS
fascicolo: 12, volume: 46, anno: 1998,
pagine: 1649 - 1661
SICI:
0090-6778(199812)46:12<1649:SCOFCS>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
INFORMATION-THEORETIC CONSIDERATIONS; MULTIPLE-ACCESS CHANNEL; FADING CHANNELS; ERROR PROBABILITIES; CDMA SYSTEM; RADIO; INTERFERENCE;
Keywords:
block-interference and block-fading channels; cellular systems; information outage probability;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
--discip_EC--
Citazioni:
50
Recensione:
Indirizzi per estratti:
Indirizzo: Caire, G Inst Eurecom, Mobile Commun Grp, F-06904 Sophia Antipolis, FranceInst Eurecom Sophia Antipolis France F-06904 Antipolis, France
Citazione:
G. Caire et al., "System capacity of F-TDMA cellular systems", IEEE COMMUN, 46(12), 1998, pp. 1649-1661

Abstract

We study the system capacity of cellular systems with time-division multiple access, slow time-frequency hopping (F-TDMA), and conventional single-user processing at the receivers. System capacity is formally defined as the maximum of the product of the number of users per cell times the user spectral efficiency for a given maximum outage probability. We adopt an information-theoretic definition of outage as the event that the mutual informationof the block-interference channel resulting from a finite number of signalbursts spanned by the transmission of a user code word falls below the actual code rate, because of fading, shadowing, and interference. Starting from this definition, we develop a general framework which naturally takes into account many different aspects of F-TDMA cellular systems like channel reuse, channel utilization, waveform design, time-frequency hopping, voice activity exploitation, handoff, and power control strategies. Most importantly, our analysis does not rely on the choice of a particular coding scheme and can be applied to a very large class of systems in order to find guidelines for capacity-maximizing system design. A numerical example based on a typical urban mobile environment shows that there is a considerable capacitygap between actual F-TDMA systems and the limits predicted by our analysis, However, this gap can be filled by carefully designed "practical" systems, which make use of conventional single-user processing and simple coded modulation schemes.

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Documento generato il 15/07/20 alle ore 08:14:57