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Titolo:
Two-stage code reference beamformer for the reception of frequency hoppingmodulated signals
Autore:
Najar, M; Mestre, X; Lagunas, MA;
Indirizzi:
Univ Politecn Catalunya, Dept Signal Theory & Commun, ES-08034 Barcelona, Spain Univ Politecn Catalunya Barcelona Spain ES-08034 -08034 Barcelona, Spain
Titolo Testata:
SIGNAL PROCESSING
fascicolo: 12, volume: 80, anno: 2000,
pagine: 2623 - 2632
SICI:
0165-1684(200012)80:12<2623:TCRBFT>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
ADAPTIVE ARRAY;
Keywords:
code reference beamforming; frequency hopping modulation; mobile communication;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
12
Recensione:
Indirizzi per estratti:
Indirizzo: Najar, M Univ Politecn Catalunya, Dept Signal Theory & Commun, C Jordi Girona 1-3, ES-08034 Barcelona, Spain Univ Politecn Catalunya C Jordi Girona 1-3 Barcelona Spain ES-08034
Citazione:
M. Najar et al., "Two-stage code reference beamformer for the reception of frequency hoppingmodulated signals", SIGNAL PROC, 80(12), 2000, pp. 2623-2632

Abstract

This paper presents a beamforming technique for the reception of frequencyhopping (FH) modulated signals, which takes advantage of their inherent frequency diversity. This technique, based on a code reference beamformer, requires neither temporal nor spatial a priori reference and allows continuous self-calibration of the array. The proposed framework is composed of two different stages. The first stage employs the inverse of the noise plus interference covariance matrix obtained by an anticipative processor. The second stage makes use of the steering vector of the signal of interest which is adaptively obtained by maximizing the output signal to interference plus noise ratio (SINR). Using this information, the first stage is in turn readjusted and, as a result, the scheme is able to track non-stationary scenarios following the channel variations with no previous references other than knowledge of the frequency hopping sequence. The two-stage code reference beamformer provides the convergence rate necessary to avoid the SINR reduction associated with frequency hops in existing methods. (C) 2000 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/03/20 alle ore 12:07:27