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TERMINATION CRITERIA IN ITERATIVE SOLUTION OF LARGE SCATTERING PROBLEMS USING INTEGRAL EQUATION METHODS

โœ Scribed by WALKER, S. P. ;LEE, B. H.

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
135 KB
Volume
13
Category
Article
ISSN
1069-8299

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โœฆ Synopsis

Iterative methods are used increasingly for solution of the extremely large matrix equations generated by integral equation analysis of multi-wavelength frequency domain scattering. Although much cheaper than direct methods, the matrix solution remains the dominant cost, and is very costly. The criterion adopted for termination of the iteration can have a marked eect on this cost. We show that for large scattering problems a robust and rational prior choice of termination criterion can be made, based only on discretization. This allows conยฎdent use of a much larger termination residual than those commonly used, with consequent cost reduction.

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