Distortion-free delta-sigma beamforming

We have analyzed a compact, digital delay- and-sum beamformer using 1-bit delta-sigma A/D converters, where dynamic delays are applied directly to the delta-sigma modulated bitstream. It has previously been shown that the introduction of this time-variant operation into the time-invariant delta-sigm...

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Veröffentlicht in:	IEEE transactions on ultrasonics, ferroelectrics, and frequency control ferroelectrics, and frequency control, 2008-08, Vol.55 (8), p.1719-1728
Hauptverfasser:	Nilsen, C.-I.C., Holm, S.
Format:	Artikel
Sprache:	eng
Schlagworte:	Acoustic signal processing Acoustics Analog-Digital Conversion Array signal processing Assessments Computer-Aided Design Costs Delay Delta modulation Demodulators Digital modulation Distortion Dynamic tests Dynamical systems Dynamics Equipment Design Equipment Failure Analysis Exact sciences and technology Focusing Fundamental areas of phenomenology (including applications) Image Enhancement - instrumentation Interpolation Optical modulation Phase change materials Physics Signal Processing, Computer-Assisted - instrumentation Terminology Transducers Ultrasonography - instrumentation Ultrasonography - methods
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