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Implementation of the Near-Field Signal Redundancy Phase-Aberration Correction Algorithm on Two-Dimensional Arrays.
- Source :
-
IEEE Transactions on Ultrasonics Ferroelectrics & Frequency Control . Jan2007, Vol. 54 Issue 1, p42-51. 10p. 1 Diagram, 6 Graphs. - Publication Year :
- 2007
-
Abstract
- Near-field signal-redundancy (NFSR) algorithms for phase-aberration correction have been proposed and experimentally tested for linear and phased one- dimensional arrays. In this paper the performance of an all-row-plus-two-column, two-dimensional algorithm has been analyzed and tested with simulated data sets. This algorithm applies the NFSR algorithm for one-dimensional arrays to all the rows as well as the first and last columns of the array. The results from the two column measurements are used to derive a linear term for each row measurement result. These linear terms then are incorporated into the row results to obtain a two-dimensional phase aberration profile. The ambiguity phase aberration profile, which is the difference between the true and the derived phase aberration profiles, of this algorithm is not linear. Two methods, a trial-and-error method and a diagonal-measurement method, are proposed to linearize the ambiguity profile. The performance of these algorithms is analyzed and tested with simulated data sets. [ABSTRACT FROM AUTHOR]
- Subjects :
- *OPTICS
*ALGORITHMS
*SEMANTICS
*PHYSICS
Subjects
Details
- Language :
- English
- ISSN :
- 08853010
- Volume :
- 54
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Ultrasonics Ferroelectrics & Frequency Control
- Publication Type :
- Academic Journal
- Accession number :
- 23658366
- Full Text :
- https://doi.org/10.1109/TUFFC.2007.210