In this thesis the direction of arrival estimation of wideband signals using frequency
invariant beamforming method is examined. The difficulty with the direction of
arrival estimation of wideband signals is that it is not possible to obtain a single
covariance matrix valid for the whole frequency spectrum of the signal. There are
various methods proposed in the literature to overcome this difficulty. The
common aim of all the methods is to obtain a composite covariance matrix for the
overall band of the signal.
In this thesis, we concentrate on a method in [12]. This method is based on a
beamforming technique that provides frequency invariant beams in the band of
interest. Therefore there is no need for frequency decomposition as it is done with
the other wideband methods. A comparison of the frequency invariant beamforming
method with coherent signal subspace methods and narrow band methods is also
given.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/2/12609975/index.pdf |
| Date | 01 September 2008 |
| Creators | Babatas, Eren |
| Contributors | Candan, Cagatay |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for METU campus |
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