A new broadband beamformer using IIR filters

In this letter, a new broadband beamformer using infinite impulse response (IIR) filters is proposed. The unique feature of our letter is that by replacing all the delay elements with tap-to-tap IIR filters under some structural restrictions, the Frost processor is naturally extended from the finite...

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Bibliographic Details
Published inIEEE signal processing letters Vol. 12; no. 11; pp. 776 - 779
Main Authors Duan, Huiping, Ng, Boon Poh, See, Chong Meng
Format Journal Article
LanguageEnglish
Published New York IEEE 01.11.2005
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Array signal processing
broadband beamforming
Computational modeling
Delay
Feedback
Finite impulse response filter
IIR filters
infinite impulse response (IIR) filter
Monitoring
Sensor arrays
Signal processing algorithms
Stability
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Summary:In this letter, a new broadband beamformer using infinite impulse response (IIR) filters is proposed. The unique feature of our letter is that by replacing all the delay elements with tap-to-tap IIR filters under some structural restrictions, the Frost processor is naturally extended from the finite impulse response (FIR) beamformer to the IIR beamformer. In the new beamformer, the feedforward and feedback weights are computed with the constrained and unconstrained least-mean-squares algorithms, respectively. The stability of the IIR filters in the proposed beamformer could be monitored easily. Simulation results demonstrate the improved performance of the new IIR beamformer relative to the Frost beamformer.
Bibliography:ObjectType-Article-2
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content type line 23
ISSN:1070-9908
1558-2361
DOI:10.1109/LSP.2005.856873