Impact of Sample Window Choice and Location on Time Delay Estimation of Transients
Estimation of time delays between coherent transient signals is biased by the choice and location of the sampling window. For transients that do not tend to zero within the sampling window (self-windowing), the uniform or boxcar window may not be the best choice due to spectral leakage. This is espe...
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ftdtic:ADA233687 2023-05-15T18:18:28+02:00 Impact of Sample Window Choice and Location on Time Delay Estimation of Transients Meredith, Roger W. Lyebourne, III, Allen E. NAVAL OCEANOGRAPHIC AND ATMOSPHERIC RESEARCH LAB STENNIS SPACE CENTER MS 1989-12-01 text/html http://www.dtic.mil/docs/citations/ADA233687 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA233687 en eng http://www.dtic.mil/docs/citations/ADA233687 Approved for public release; distribution is unlimited. DTIC AND NTIS Acoustic Detection and Detectors *TRANSIENTS POSITION(LOCATION) OPTIMIZATION COHERENCE ESTIMATES SPECTRA ASYMMETRY SIGNALS SAMPLING WINDOWS INTERFERENCE DELAY BIAS AMBIENT NOISE ITERATIONS SIDELOBES NOISE(SOUND) TIME INTERVALS *ACOUSTIC VELOCITY *SEA ICE *ACOUSTIC WINDOWS PE62435N WUDN496433 TIME DELAY UNDERWATER NOISE Text 1989 ftdtic 2016-02-22T22:55:09Z Estimation of time delays between coherent transient signals is biased by the choice and location of the sampling window. For transients that do not tend to zero within the sampling window (self-windowing), the uniform or boxcar window may not be the best choice due to spectral leakage. This is especially important when processing highly asymmetrical transient signals that are not self windowing as in the case of acoustic ambient noise. When a sample window is used to suppress spectral leakage, a bias in time delay estimation results from a suboptimal window location. Even though the boxcar window produces the least bias in time delay when the transient is self windowing, it is shown that sidelobe interference is significant for highly asymmetric signals. This work critically examines these effects and describes an iterative procedure to determine optimal location of the transient within any sample window. Availability: Naval Ocean Research and Development Activity, Stennis Space Center, MS 39529-5004. Text Sea ice Defense Technical Information Center: DTIC Technical Reports database |
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Open Polar |
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Defense Technical Information Center: DTIC Technical Reports database |
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ftdtic |
language |
English |
topic |
Acoustic Detection and Detectors *TRANSIENTS POSITION(LOCATION) OPTIMIZATION COHERENCE ESTIMATES SPECTRA ASYMMETRY SIGNALS SAMPLING WINDOWS INTERFERENCE DELAY BIAS AMBIENT NOISE ITERATIONS SIDELOBES NOISE(SOUND) TIME INTERVALS *ACOUSTIC VELOCITY *SEA ICE *ACOUSTIC WINDOWS PE62435N WUDN496433 TIME DELAY UNDERWATER NOISE |
spellingShingle |
Acoustic Detection and Detectors *TRANSIENTS POSITION(LOCATION) OPTIMIZATION COHERENCE ESTIMATES SPECTRA ASYMMETRY SIGNALS SAMPLING WINDOWS INTERFERENCE DELAY BIAS AMBIENT NOISE ITERATIONS SIDELOBES NOISE(SOUND) TIME INTERVALS *ACOUSTIC VELOCITY *SEA ICE *ACOUSTIC WINDOWS PE62435N WUDN496433 TIME DELAY UNDERWATER NOISE Meredith, Roger W. Lyebourne, III, Allen E. Impact of Sample Window Choice and Location on Time Delay Estimation of Transients |
topic_facet |
Acoustic Detection and Detectors *TRANSIENTS POSITION(LOCATION) OPTIMIZATION COHERENCE ESTIMATES SPECTRA ASYMMETRY SIGNALS SAMPLING WINDOWS INTERFERENCE DELAY BIAS AMBIENT NOISE ITERATIONS SIDELOBES NOISE(SOUND) TIME INTERVALS *ACOUSTIC VELOCITY *SEA ICE *ACOUSTIC WINDOWS PE62435N WUDN496433 TIME DELAY UNDERWATER NOISE |
description |
Estimation of time delays between coherent transient signals is biased by the choice and location of the sampling window. For transients that do not tend to zero within the sampling window (self-windowing), the uniform or boxcar window may not be the best choice due to spectral leakage. This is especially important when processing highly asymmetrical transient signals that are not self windowing as in the case of acoustic ambient noise. When a sample window is used to suppress spectral leakage, a bias in time delay estimation results from a suboptimal window location. Even though the boxcar window produces the least bias in time delay when the transient is self windowing, it is shown that sidelobe interference is significant for highly asymmetric signals. This work critically examines these effects and describes an iterative procedure to determine optimal location of the transient within any sample window. Availability: Naval Ocean Research and Development Activity, Stennis Space Center, MS 39529-5004. |
author2 |
NAVAL OCEANOGRAPHIC AND ATMOSPHERIC RESEARCH LAB STENNIS SPACE CENTER MS |
format |
Text |
author |
Meredith, Roger W. Lyebourne, III, Allen E. |
author_facet |
Meredith, Roger W. Lyebourne, III, Allen E. |
author_sort |
Meredith, Roger W. |
title |
Impact of Sample Window Choice and Location on Time Delay Estimation of Transients |
title_short |
Impact of Sample Window Choice and Location on Time Delay Estimation of Transients |
title_full |
Impact of Sample Window Choice and Location on Time Delay Estimation of Transients |
title_fullStr |
Impact of Sample Window Choice and Location on Time Delay Estimation of Transients |
title_full_unstemmed |
Impact of Sample Window Choice and Location on Time Delay Estimation of Transients |
title_sort |
impact of sample window choice and location on time delay estimation of transients |
publishDate |
1989 |
url |
http://www.dtic.mil/docs/citations/ADA233687 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA233687 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA233687 |
op_rights |
Approved for public release; distribution is unlimited. |
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1766195042395881472 |