Consiglio Nazionale delle Ricerche

Tipo di prodottoArticolo in rivista
TitoloAn analytical framework for CDMA systems with a nonlinear amplifier and AWGN
Anno di pubblicazione2002
Formato-
Autore/iA. Conti, D. Dardari, V. Tralli
Affiliazioni autori1- IEIIT - CNR, Sezione di Bologna 2- CNIT, DEIS - University of Bologna 3- DIF - University of Ferrara
Autori CNR e affiliazioni
  • ANDREA CONTI
Lingua/e-
AbstractThe design of code-division multiple-access (CDMA) transmission systems for satellite communications requires an appropriate consideration of the distortion effects due to on-board nonlinear amplification. The aim of this paper is to provide an analytical framework for the evaluation of the in-band nonlinear distortion effects on the performance of CDMA systems. Both synchronous systems with orthogonal codes and asynchronous systems are considered. It is first shown that, when the users accessing the channel have the same power and their number is sufficiently large, the nonlinear distortion in the decision variables at the receiver can be simply described by a complex scale factor, which depends on the high-power-amplifier (HPA) characteristics only, and an additive noise, which is uncorrelated to the useful signal. Moreover, an analytical formulation of the bit error probability and the total degradation as a function of the output back-off and number of users is given. In the results, which are obtained for three classes of HPA models (i.e., the traveling wave tube amplifier, the solid-state power amplifier, and the amplifier with ideal predistortion), the performance and the capacity of power-limited systems is also discussed.
Lingua abstract-
Altro abstract-
Lingua altro abstract-
Pagine da1110
Pagine a1120
Pagine totali-
RivistaIEEE transactions on communications (Print)
Attiva dal 1972
Editore: Institute of Electrical and Electronics Engineers] - [New York,
Paese di pubblicazione: Stati Uniti d'America
Lingua: inglese
ISSN: 0090-6778
Titolo chiave: IEEE transactions on communications (Print)
Titolo proprio: IEEE transactions on communications. (Print)
Titolo abbreviato: IEEE trans. commun. (Print)
Titoli alternativi:
  • Transactions on communications (Print)
  • Communications (Print)
Numero volume della rivista50
Fascicolo della rivista-
DOI-
Verificato da referee-
Stato della pubblicazione-
Indicizzazione (in banche dati controllate)-
Parole chiaveCDMA, nonlinearities
Link (URL, URI)-
Titolo parallelo-
Data di accettazione-
Note/Altre informazioni-
Strutture CNR
  • IEIIT — Istituto di elettronica e di ingegneria dell'informazione e delle telecomunicazioni
Moduli CNR-
Progetti Europei-
Allegati

Dati storici
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Area disciplinareInformation Technology & Communications Systems
Area valutazione CIVRIngegneria industriale e informatica
Rivista ISIIEEE TRANSACTIONS ON COMMUNICATIONS [42895J0]
Descrizione sintetica del prodottoThe design of code-division multiple-access (CDMA) transmission systems for satellite communications requires an appropriate consideration of the distortion effects due to on-board nonlinear amplification. The aim of this paper is to provide an analytical framework for the evaluation of the in-band nonlinear distortion effects on the performance of CDMA systems. Both synchronous systems with orthogonal codes and asynchronous systems are considered. It is first shown that, when the users accessing the channel have the same power and their number is sufficiently large, the nonlinear distortion in the decision variables at the receiver can be simply described by a complex scale factor, which depends on the high-power-amplifier (HPA) characteristics only, and an additive noise, which is uncorrelated to the useful signal. Moreover, an analytical formulation of the bit error probability and the total degradation as a function of the output back-off and number of users is given. In the results, which are obtained for three classes of HPA models (i.e., the traveling wave tube amplifier, the solid-state power amplifier, and the amplifier with ideal predistortion), the performance and the capacity of power-limited systems is also discussed.