1. PULSE COMPRESSION TECHNIQUE CONSIDERING VELOCITY DISPERSION OF GUIDED WAVE.
- Author
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Toiyama, K. and Hayashi, T.
- Subjects
- *
WAVES (Physics) , *SIGNAL-to-noise ratio , *HYDRODYNAMICS , *VIBRATION (Mechanics) , *SIGNAL processing - Abstract
An improved pulse compression technique was developed for long range testing using dispersive guided waves. This technique improves signal-to-noise ratio (SNR) of the guided wave signals and compensates for the wave distortion caused by dispersion characteristics of the guided wave. A fast calculation algorism was designed. It consists of integrations of both cross-correlation for pulse compression and compensation of velocity dispersion in wave number domain. Efficiency of the technique was verified experimentally, in which the results showed both spatial resolution and signal-to-noise ratio were improved. [ABSTRACT FROM AUTHOR]
- Published
- 2008
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