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Titolo:
CDMA system design through asymptotic analysis
Autore:
Biglieri, E; Caire, G; Taricco, G;
Indirizzi:
Politecn Turin, Dipartimento Elettron, I-10129 Turin, Italy Politecn Turin Turin Italy I-10129 imento Elettron, I-10129 Turin, Italy
Titolo Testata:
IEEE TRANSACTIONS ON COMMUNICATIONS
fascicolo: 11, volume: 48, anno: 2000,
pagine: 1882 - 1896
SICI:
0090-6778(200011)48:11<1882:CSDTAA>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
INTERFERENCE; RADIO;
Keywords:
CDMA system capacity; linear receivers; multirate CDMA; random spreading;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
--discip_EC--
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Biglieri, E Politecn Turin, Dipartimento Elettron, I-10129 Turin, Italy Politecn Turin Turin Italy I-10129 ron, I-10129 Turin, Italy
Citazione:
E. Biglieri et al., "CDMA system design through asymptotic analysis", IEEE COMMUN, 48(11), 2000, pp. 1882-1896

Abstract

We use results from the asymptotic analysis of code-division multiple access with random spreading as a tool for gaining insight and deriving design guidelines on practical system issues, inspired by the current UMTS/IMT2000standardization process. In particular, we consider a simple synchronous single-cell system with perfect power control and linear detection, and we examine the following: 1) the optimal tradeoff between coding rate and spreading gain and 2) the comparison of different multirate schemes. Our analysis shows that, for the sake of system spectral efficiency maximization, there exists a threshold E-b/N-0 below which the single-user matched filter (SUMF) is optimal (within the limits of our system model). As far as multirate schemes are concerned, we show that multicode and variable-spreading with SUMF detection are equivalent, while the former is uniformly better than the latter with linear minimum-mean-square error detection. Variable-spreading can perform very close to multicode if high-rate users are detected by observing the whole "low-rate" symbol interval. Finally, we compare the capacity regions of the multimodulation and multicode schemes versusthe E-b/N-0 ratio.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 08/07/20 alle ore 23:58:54