Directional wavelet transform in the context of complex quadrature Doppler signals


Aydin N. , MARKUS H.

IEEE SIGNAL PROCESSING LETTERS, cilt.7, ss.278-280, 2000

  • Cilt numarası: 7 Konu: 10
  • Basım Tarihi: 2000
  • Doi Numarası: 10.1109/97.870680
  • Dergi Adı: IEEE SIGNAL PROCESSING LETTERS
  • Sayfa Sayısı: ss.278-280

Özet

Most Doppler ultrasound systems employ quadrature demodulation techniques at the detection stage. The information concerning flow direction encoded in the phase relationship between in-phase and quadrature phase channels is not obvious at this stage. A method based on the utilization of complex wavelets and negative scales has been described. It eliminates the intermediate processing stages by mapping directional information in the scale domain.