### Resumé

Originalsprog | Engelsk |
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Titel | 2014 Proceedings of the 22nd European Signal Processing Conference (EUSIPCO 2014) |

Antal sider | 5 |

Forlag | IEEE |

Publikationsdato | 2014 |

Sider | 666-670 |

ISBN (Trykt) | 9781479946037 |

Status | Udgivet - 2014 |

Begivenhed | European Signal Processing Conference (EUSIPCO) - Lisbon, Portugal Varighed: 1 sep. 2014 → 5 sep. 2014 |

### Konference

Konference | European Signal Processing Conference (EUSIPCO) |
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Land | Portugal |

By | Lisbon |

Periode | 01/09/2014 → 05/09/2014 |

### Fingerprint

### Citer dette

*2014 Proceedings of the 22nd European Signal Processing Conference (EUSIPCO 2014)*(s. 666-670). IEEE.

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*2014 Proceedings of the 22nd European Signal Processing Conference (EUSIPCO 2014) .*IEEE, s. 666-670, European Signal Processing Conference (EUSIPCO), Lisbon, Portugal, 01/09/2014.

**A Broadband Beamformer Using Controllable Constraints and Minimum Variance.** / Karimian-Azari, Sam; Benesty, Jacob; Jensen, Jesper Rindom; Christensen, Mads Græsbøll.

Publikation: Bidrag til bog/antologi/rapport/konference proceeding › Konferenceartikel i proceeding › Forskning › peer review

TY - GEN

T1 - A Broadband Beamformer Using Controllable Constraints and Minimum Variance

AU - Karimian-Azari, Sam

AU - Benesty, Jacob

AU - Jensen, Jesper Rindom

AU - Christensen, Mads Græsbøll

PY - 2014

Y1 - 2014

N2 - The minimum variance distortionless response (MVDR) and the linearly constrained minimum variance (LCMV) beamformers are two optimal approaches in the sense of noise reduction. The LCMV beamformer can also reject interferers using linear constraints at the expense of reducing the degree of freedom in a limited number of microphones. However, it may magnify noise that causes a lower output signal-to-noise ratio (SNR) than the MVDR beamformer. Contrarily, the MVDR beamformer suffers from interference in output. In this paper, we propose a controllable LCMV (C-LCMV) beamformer based on the principles of both the MVDR and LCMV beamformers. The C-LCMV approach can control a compromise between noise reduction and interference rejection. Simulation results show that the C-LCMV beamformer outperforms the MVDR beamformer in interference rejection, and the LCMV beamformer in background noise reduction.

AB - The minimum variance distortionless response (MVDR) and the linearly constrained minimum variance (LCMV) beamformers are two optimal approaches in the sense of noise reduction. The LCMV beamformer can also reject interferers using linear constraints at the expense of reducing the degree of freedom in a limited number of microphones. However, it may magnify noise that causes a lower output signal-to-noise ratio (SNR) than the MVDR beamformer. Contrarily, the MVDR beamformer suffers from interference in output. In this paper, we propose a controllable LCMV (C-LCMV) beamformer based on the principles of both the MVDR and LCMV beamformers. The C-LCMV approach can control a compromise between noise reduction and interference rejection. Simulation results show that the C-LCMV beamformer outperforms the MVDR beamformer in interference rejection, and the LCMV beamformer in background noise reduction.

KW - Microphone arrays

KW - frequency-domain beamforming

KW - MVDR

KW - LCMV

KW - controllable beamformer

M3 - Article in proceeding

SN - 9781479946037

SP - 666

EP - 670

BT - 2014 Proceedings of the 22nd European Signal Processing Conference (EUSIPCO 2014)

PB - IEEE

ER -