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Titolo:
Efficient robust adaptive beamforming for cyclostationary signals
Autore:
Lee, JH; Lee, YT; Shih, WH;
Indirizzi:
Natl Taiwan Univ, Dept Elect Engn, Taipei 10764, Taiwan Natl Taiwan Univ Taipei Taiwan 10764 pt Elect Engn, Taipei 10764, Taiwan
Titolo Testata:
IEEE TRANSACTIONS ON SIGNAL PROCESSING
fascicolo: 7, volume: 48, anno: 2000,
pagine: 1893 - 1901
SICI:
1053-587X(200007)48:7<1893:ERABFC>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPECTRAL CORRELATION; MODULATED SIGNALS;
Keywords:
adaptive beamforming; cycle frequency error; cyclostationary signals;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
--discip_EC--
Citazioni:
11
Recensione:
Indirizzi per estratti:
Indirizzo: Lee, JH Natl Taiwan Univ, Dept Elect Engn, Taipei 10764, Taiwan Natl Taiwan Univ Taipei Taiwan 10764 Engn, Taipei 10764, Taiwan
Citazione:
J.H. Lee et al., "Efficient robust adaptive beamforming for cyclostationary signals", IEEE SIGNAL, 48(7), 2000, pp. 1893-1901

Abstract

This paper deals with the problem of robust adaptive array beamforming forcyclostationary signals. By exploiting the signal cyclostationarity, the LS-SCORE algorithm presented in a paper by Agee et al. has been shown to be effective in performing adaptive beamforming without requiring the direction vector of the desired signal. However, this algorithm suffers from severeperformance degradation even if there is a small mismatch in the cycle frequency of the desired signal. In this paper, we first evaluate the performance of the LS-SCORE algorithm in the presence of cycle frequency error (CFE). An analytical formula is derived to show the behavior of the performancedegradation due to CFE. An efficient method is then developed based on thefact that the array output power approaches its maximum as the CFE is reduced. We formulate the problem as an optimization problem for reducing the CFE iteratively to achieve robust adaptive beamforming against the CFE, Simulation examples for confirming the theoretical analysis and showing the effectiveness of the proposed method are provided.

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Documento generato il 07/04/20 alle ore 21:47:32