Repository logo
 

Sparse Directional Estimation of the Time-Varying Underwater Acoustic Channel

dc.contributor.authorMcIntyre, Graham Mark
dc.contributor.copyright-releaseNot Applicableen_US
dc.contributor.degreeMaster of Applied Scienceen_US
dc.contributor.departmentDepartment of Electrical & Computer Engineeringen_US
dc.contributor.ethics-approvalNot Applicableen_US
dc.contributor.external-examinern/aen_US
dc.contributor.graduate-coordinatorDr. Jason Guen_US
dc.contributor.manuscriptsNot Applicableen_US
dc.contributor.thesis-readerDr. Rob Adamsonen_US
dc.contributor.thesis-readerDr. Adam Donaldsonen_US
dc.contributor.thesis-supervisorDr. Jean Francois Bousqueten_US
dc.date.accessioned2015-10-30T13:58:51Z
dc.date.available2015-10-30T13:58:51Z
dc.date.defence2015-10-16
dc.date.issued2015
dc.description.abstractThis thesis focuses on the directional estimate of the underwater acoustic channel using modal beamforming with an orthogonal frequency division multiplexed (OFDM) communication system. An underwater channel model and simulator is first presented that is capable of implementing the time-scaling associated with the wideband time-varying acoustic channel. Modal beamforming is then introduced as a unique wideband beamforming method that makes use of circular arrays. The last Section explores the effect of a time-varying acoustic channel on an OFDM signal and produces a frequency domain channel that models the distortions that are introduced. This frequency domain model is then used to create a sparse approximation dictionary that, when coupled with the modal beamformer and a sparse approximation technique, is capable of producing accurate sparse directional channel estimates. These estimates include the complex amplitude, delay, time-scaling factor, and direction of arrival for each cluster arrival in the channel. This directional channel estimate is shown to greatly improve the performance of an OFDM receiver in a time-varying underwater acoustic channel when compared to classic estimation techniques.en_US
dc.identifier.urihttp://hdl.handle.net/10222/64555
dc.language.isoenen_US
dc.subjectEngineeringen_US
dc.subjectSparse estimationen_US
dc.subjectChannel Estimationen_US
dc.subjectChannel Modelingen_US
dc.subjectWideband beamformingen_US
dc.titleSparse Directional Estimation of the Time-Varying Underwater Acoustic Channelen_US

Files

Original bundle

Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
McIntyre-Graham-MASc-ECED-October-2015.pdf
Size:
2.35 MB
Format:
Adobe Portable Document Format
Description:

License bundle

Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description: