NDT.net July 2003, Vol. 8 No.07

Digital signal processing in ultrasonic multi-channel measurements

G. Armanaviius, R. Kažys
Prof. K. Baršauskas ultrasound institute
Kaunas University of Technology
Published in Ultragarsas Journal 2002 Vol43 No2

Introduction

Requirements to measurement signals

Parameters of the PN sequences

Digital signal processing

Results of digital signal processing

Conclusions

References

  1. Kažys R., Svilainis L., Mažeika L. Application of orthogonal ultrasonic signals and binaural processing for imaging of the environment. Ultrasonics. 2000. Vol.38. No.1-8. P.171-175.
  2. Kažys R. Smart systems for robot vision. Proceedings of the 5th International Symposium on Methods and Models in Automation and Robotics. Miedzyzdroje, Poland. 1998. Vol.3. P.827-832.
  3. Armanavicius G. Parameters of spread spectrum signals. Ultrasound 2000. Vol.35. No.2. P.40-45.
  4. Karkkainen K. Comparison of the performance of some linear spreading code families for asynchronous DS/SSMA systems. IEEE Trans. on Com. 1991. Vol. MilCom 2. P.784-790.
  5. Armanavicius G., Kažys R. Analysis of pseudo noise sequences for multi channel distance measurements. Ultragarsas. 2000. Vol. 37. No. 4.
  6. Meel J. Spread Spectrum. Sirius Communications. Belgium. 1999. Vol. 2.
  7. Niederdrank T. Maximum length sequences in non-destructive material testing: application of piezoelectric transducers and effects of time variances. Ultrasonics. 1997. Vol.35. P.195-203.
  8. Mayer K., Marklein R., Langenberg K. J. and Krutter T. Three – dimensional imaging system based on Fourier transform synthetic aperture focusing technique. Ultrasonics. 1990. Vol.28. P.241-255.
  9. Karkkainen K. Influence of various PN sequence phase optimization criteria on the SNR performance of an asynchronous DS-CDMA system. IEEE Trans. on Com. 1995. P.641-646.

G. Armanavicius, R. Kažys

© NDT.net - info@ndt.net |Top|