AIP conference proceedings · 2008 · 17 citations · 0 references
EngineeringElectrical EngineeringBiomedical OpticsBiomedical Signal ProcessingUltrasoundDigital Signal ProcessingWave DispersionWave PropagationCompressionDispersive Wave PropagationGuided Wave PropagationGuided Wave TestingGuided WavesPulse CompressionSpatial Resolution MeasurementWave Number
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.