Estimating and removing colorations from the deconvolved impulse response of an underwater acoustic channel
The impulse response (IR) of an acoustic channel can be obtained by cross-correlating the received signal with the broadband excitation signal in unfavorable noise conditions. However, the deconvolved IR is colored by the IRs of the combined electrical equipment. This letter presents a time domain a...
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Published in | The Journal of the Acoustical Society of America Vol. 141; no. 1; pp. EL6 - EL10 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
United States
01.01.2017
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Online Access | Get full text |
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Summary: | The impulse response (IR) of an acoustic channel can be obtained by cross-correlating the received signal with the broadband excitation signal in unfavorable noise conditions. However, the deconvolved IR is colored by the IRs of the combined electrical equipment. This letter presents a time domain approach using pre-computed filters to whiten the unknown coloration in order to obtain the channel's time domain waveform. The method is validated with an image-source model and the IR of the channel is recovered with spectral root mean square error of −27 dB. Data results obtained from a pool experiment with non-calibrated equipment yield a whitened IR with standard deviation of 0.9 dB (30–68 kHz band). |
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ISSN: | 0001-4966 1520-8524 |
DOI: | 10.1121/1.4973311 |