Abstract
The spectral bandwidth of received pulse-echo signals often is far less than the bandwidth originally generated by the transmitter electronics. This decrease in bandwidth may e.g. be caused by attenuation and/or transmitter/receiver characteristics. Processing techniques, such as inverse filtering, aim to restore the original signal bandwidth in order to improve temporal resolution of the pulse-echo data.
Spectral equalisation is a relatively unknown processing technique with similar objectives. It aims at equally distributing the signal energy within the available spectral bandwidth, i.e. to flatten the frequency spectrum.
In this paper we will discuss two types of application:
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Spectral equalisation on broad-band attenuated signals.
This type of application may successfully be applied in seismic data processing.
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Spectral equalisation on sequentially transmitted narrow-band signals covering different bandwidths.
Presently this technique is being used in an acoustic sub-bottom profiler to improve depth-resolution.
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© 1984 Plenum Press, New York
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van der Wal, L.F., Dijkhuizen, A.C., Peels, G.L. (1984). Spectral Equalisation: A Signal Processing Technique to Increase Pulse-Echo Signal Bandwidth. In: Kaveh, M., Mueller, R.K., Greenleaf, J.F. (eds) Acoustical Imaging. Acoustical Imaging, vol 13. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-2779-0_23
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DOI: https://doi.org/10.1007/978-1-4613-2779-0_23
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