Distortion-free delta-sigma beamforming

@article{Nilsen2008DistortionfreeDB,
  title={Distortion-free delta-sigma beamforming},
  author={C.-I.C. Nilsen and Sverre Holm},
  journal={IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control},
  year={2008},
  volume={55}
}
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-sigma demodulator distorts the output signal, and several methods for minimizing this effect have been suggested. We have described the effect using standard system terminology. Based on this description… CONTINUE READING
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