WCAWEWell-Conditioned Asymptotic Waveform Evaluation
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To avoid the underlying numerical instability of the AWE approach the WCAWE technique was derived [11].
It should be noted that in order to achieve additional bandwidth in either the frequency or angular domain, a multipoint MDWCAWE approach could be implemented similar to that of the WCAWE. Additionally, automated error controls are outlined in [17, 18] that can be used to determine the number of moment required such that the approximate solution can converge to a pre-specified tolerance.
These results are not unexpected as the WCAWE has been previously shown to be a more accurate technique than the AWE with Pade.
In this paper, a multi-dimensional version of the WCAWE model order reduction technique was developed that can produce both a broad frequency and angular band approximation simultaneously.