Deconvolved frequency-difference beamforming for a linear array

Lei Xie, Chao Sun, Jiwei Tian

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Frequency-difference beamforming (FDB) provides a robust estimation of wave propagation direction by shifting signal processing to a lower frequency which, however, produces a decline in the spatial resolution. In this letter, the beam pattern of FDB for a distant point source is proved to be shift invariant and therefore can be regarded as the point spread function corresponding to FDB's beam output. Then, deconvolved frequency-difference beamforming (Dv-FDB) is proposed to improve array performance. Dv-FDB yields a narrower beam and lower sidelobe levels while maintaining robustness. The superior performance of Dv-FDB is verified by simulations and experimental data.

Original languageEnglish
Pages (from-to)L440-L446
JournalJournal of the Acoustical Society of America
Volume148
Issue number6
DOIs
StatePublished - 1 Dec 2020

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