Reproducing kernel approximation in weighted Bergman spaces: Algorithm and applications
Reproducing kernel approximation in weighted Bergman spaces: Algorithm and applications
复制标题
在加权伯格曼空间中再现核近似:算法和应用
DOI:
10.1002/mma.5648
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发表时间:
2019-05
影响因子:
2.9
通讯作者:
Pei Dang
中科院分区:
文献类型:
--
作者:
Wei Qu;Pei Dang
In this paper, we present algorithms of preorthogonal adaptive Fourier decomposition (POAFD) in weighted Bergman spaces. POAFD, as has been studied, gives rise to sparse approximations as linear combinations of the corresponding reproducing kernels. It is found that POAFD is unavailable in some weighted Hardy spaces that do not enjoy the boundary vanishing condition; as a result, the maximal selections of the parameters are not guaranteed. We overcome this difficulty with two strategies. One is to utilize the shift operator while the other is to perform weak POAFD. In the cases when the reproducing kernels are rational functions, POAFD provides rational approximations. This approximation method may be used to 1D signal processing. It is, in particular, effective to some Hardy Hp space functions for p not being equal to 2. Weighted Bergman spaces approximation may be used in system identification of discrete time‐varying systems. The promising effectiveness of the POAFD method in weighted Bergman spaces is confirmed by a set of experiments. A sequence of functions as models of the weighted Hardy spaces, being a wider class than the weighted Bergman spaces, are given, of which some are used to illustrate the algorithm and to evaluate its effectiveness over other Fourier type methods.
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DOI:
10.1016/j.sysconle.2011.10.016
发表时间:
2012
期刊:
Syst. Control. Lett.
影响因子:
--
作者:
Wen Mi;Tao Qian;Feng Wan
通讯作者:
Wen Mi;Tao Qian;Feng Wan
影响因子:
0.5
作者:
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通讯作者:
J. Ball;V. Bolotnikov
影响因子:
2.9
作者:
Tao Qian
通讯作者:
Tao Qian
影响因子:
8
作者:
Charles Swartz
通讯作者:
Charles Swartz
影响因子:
0.8
作者:
W. Qu;P. Dang
通讯作者:
W. Qu;P. Dang