PHASE-ERROR-FREE QUADRATURE SAMPLING TECHNIQUE IN THE ULTRASONIC B-SCAN IMAGING-SYSTEM AND ITS APPLICATION TO THE SYNTHETIC FOCUSING SYSTEM

The quadrature sampling technique as a means of detecting the envelope of PF waveform in the baseband is well known. If this technique is applied to a focused ultrasound imaging system using an array transducer, whether it is a synthetic or nonsynthetic focusing system, unwanted phase terms appear in the expressions of the inphase and quadrature components of the baseband signal when an appropriate delay time is introduced to each channel signal for the purpose of focusing. The expressions of the inphase and quadrature components from the point of focusing are derived and analyzed in detail, and a scheme to eliminate the unwanted phase terms is proposed. The resulting phase-error-free quadrature sampling technique is applied to the synthetic focusing system; a system block diagram together with the simulation and experimental results are presented.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
1993-05
Language
ENG
Citation

IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL, v.40, no.3, pp.216 - 223

ISSN
0885-3010
URI
http://hdl.handle.net/10203/6639
Appears in Collection
EE-Journal Papers(저널논문)
Files in This Item
[1993]Phase-Error-Free Quadrature Sampling Techique in the Ultrasonic B-Scan Imaging System and Its Application to the Synthetic Focusing System.pdf(694.25 kB)Download
  • Hit : 513
  • Download : 555
  • Cited 0 times in thomson ci
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡClick to seewebofscience_button
⊙ Cited 10 items in WoSClick to see citing articles inrecords_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0