Temat: DOA - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Modified music algorithm for DOA estimation using the a-priori defined unitary matrix
Autorzy:: Janowski, T.
Porosińska, E.
Zając, R.
Powiązania:: https://bibliotekanauki.pl/articles/332526.pdf
Data publikacji:: 2009
Wydawca:: Polskie Towarzystwo Akustyczne
Tematy:: DOA
unitary matrix
music algorithm
Opis:: The determination of the number of the simultaneously observed objects is an important problem of the MUSIC algorithm. As the result of the covariance matrix eigendecomposition the eingevector and unitary matrix are obtained. The unitary matrix defines the transformation of the measurement vector. Consequently the obtained vector is orthogonal to the noise subspace. The solution of the eigendecomposition problem can be avoided assuming a-priori knowledge of the unitary matrix. Practically, the passive sonar detects the first appeared noisy object. This enable to beforehand define the set of the unitary matrixes exactly matched to the previously determined directions of the signal arrival. The article presents the form of the matrix and features of the measurement vector transformation. The results of the DOA algorithm computer simulation for passive sonar composed of four hydrophones developed in the OBR CTM S.A. are also presented.
Źródło:: Hydroacoustics; 2009, 12; 77-82
1642-1817
Pojawia się w:: Hydroacoustics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: The accuracy of a new approach to order determination for the Modified Prony method in swath mapping application
Autorzy:: Grall, P.
Powiązania:: https://bibliotekanauki.pl/articles/332035.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Akustyczne
Tematy:: swath bathymetry
principal components
resolution
DOA
Opis:: This article presents the performance of a new approach to determine the model order for the modified Prony method applied to swath acoustic mapping. Key requirements for any mapping application are depth determination accuracy and angular resolution. Depth determination accuracy is strictly related to angular accuracy and geometrical relations between receiver and sources of the backscattered signal. Angular resolution determines detection capabilities of targets laying on the seafloor. Performance of the proposed method, in terms of these two parameters, is tested against a simulated signal in a number of generic configurations, and compared to the results of other methods applied to the same signal.
Źródło:: Hydroacoustics; 2017, 20; 51-62
1642-1817
Pojawia się w:: Hydroacoustics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Theoretical analysis of a new approach to order determination for a modified Prony method in swath mapping application
Autorzy:: Grall, P.
Marszal, J.
Powiązania:: https://bibliotekanauki.pl/articles/332107.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Akustyczne
Tematy:: swath bathymetry
interferometry
principal components
DOA
MBES
Opis:: This article presents a new approach to determine the model order (number of principal components) in the modified Prony method applied to swath acoustic mapping. Determination of the number of principal components is a crucial step in the modified Prony method. In the proposed approach the model order is chosen based on the underlying physical model of the underwater acoustic environment, and utilised signal processing operations. This data-driven approach, attempts to make use of all available information to assess the number of signals arriving at the receiver using pipeline processing in lieu of iterative processing.
Źródło:: Hydroacoustics; 2017, 20; 63-74
1642-1817
Pojawia się w:: Hydroacoustics
Dostawca treści:: Biblioteka Nauki

Artykuł

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