대한의용생체공학회:의공학회지 (Journal of Biomedical Engineering Research)

  • 제19권2호
  • /
  • Pages.105-112
  • /
  • 1998
  • /
  • 1229-0807(pISSN)
  • /
  • 2288-9396(eISSN)
대한의용생체공학회 (The Korean Society of Medical and Biological Engineering)
권호 표지

디지털 빔포밍을 위한 다차 샘플링 방법의 실험적 고찰

Experimental Considration of Multi-order Sampling for Digital Beamforming

  • 나병윤 (건국대학교 전자공학과) ;
  • 정목근 (대진대학교 전자공학과, 대진대학교 전파공학과)
  • 발행 : 1998.04.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

본 논문에서는 RF초음파 신호의 포락선 검출을 위하여 제안된 다차 샘플링 방법의 성능을 실험데이터를 이용하여 Quadrature 샘플링 및 2차 샘플링 방법과 비교하였다. Quadrature 샘플링의 결과 영상과 비교해볼 때 2차 샘플링의 결과 영상은 많은 오차를 보이고 있다. 그러나 다차 샘플링 결과, 특히 5차 샘플링 결과는 매우 우수한 포락선 검출 결과를 보여주고 있다. 이러한 다차 샘플링 방법을 사용하면 보다 경제적이고 우수한 성능의 디지털 빔포밍 시스템의 구현이 가능하다.

In this paper, several bandwidth sampling methods were compared using experimental result in which contains "multi-order sampling", which was proposed for envelope detections in RF ultrasonic signals. A "Quadrature sampling method" and "Second-order sampling method" were compared with it. The resultant image of second-order sampling method introduces too much error as compared with the result of quadrature sampling. But Multi-order sampling method, specialy 5-th sampling method showed quite good envelope detection property. This means that more economical and quite good performance digital beamforming system can be built by adopting this multi-order sampling method.s multi-order sampling method.

키워드

참고문헌

  1. Proceedings of the IEEE v.67 Medical Ultrasonic Imaging: An Overview of Principles and Instrumentation J. F. Havlice;J. C. Taenzer
  2. Medical Imaging System A. Macovski
  3. J. Acoustical Society of America v.69 no.1 Beam pattern from pulsed ultrasonic transducers using linear systems theory B. G. Bardsley;D. A. Christensen
  4. IEEE Trans. on Sonics and Ultransonics v.SU-31 no.4 Fundamentals of Digital Ultrasonic Imaging Carl F. Schueler;Hua Lee
  5. Discrete-time Signal Processing Alan V. Oppenheim;Ronald W. Schafer
  6. Ultrasonic Imaging v.9 A pipelined sampled delay focusing in ultrasound imaging systems J. H. Kim;T. K. Song;S. B. Park
  7. J. Acoustical Society of America v.44 Quadrature sampling of High-Frequency Waveforms O. D. Grace;S. P. Pitt
  8. J. Acoustical Society of America v.57 Quadrature sampling error formular C. E. Persons
  9. Proceeding of the IRE A Discussion of Sampling Theorems D. A. Linden
  10. IEEE Trans. on Aerospace and Electronic Systmes v.AES-15 no.3 On Quadrature sampling of Bandpass Signals J. L. Brown
  11. IEEE Trans. on Ultrasonics v.43 no.3 Multi-order Sampling for Digital Beamforming of Wide-band Signals Weon-Hee Cho;Young-Bok Ahn
  12. Proceedings of the IEEE v.67 no.6 Digital Interpolation Beamforming for Low-Pass and Band-Pass Signals R. G. Pridham;R. A. Mucci