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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Boyer, R. Badeau, R. Favier, G. |
| Copyright Year | 2011 |
| Description | Author affiliation: Université Paris XI (UPS), LSS-Supélec, CNRS, France (Boyer, R.) || Télécom ParisTech, CNRS LTCI, France (Badeau, R.) || Université Nice Sophia Antipolis, I3S, CNRS, France (Favier, G.) |
| Abstract | Discrete-time Volterra modeling is a central topic in many application areas and a large class of nonlinear systems can be modeled using high-order Volterra series. The problem with Volterra series is that the number of parameters grows very rapidly with the order of the nonlinearity and the memory in the system. In order to efficiently implement this model, kernel eigen-decomposition can be used in the context of a Parallel-Cascade realization of a Volterra system. So, using the multilinear SVD (HOSVD) for decomposing high-order Volterra kernels seems natural. In this paper, we propose to drastically reduce the computational cost of the HOSVD by (1) considering the symmetrized Volterra kernel and (2) exploiting the column-redundancy of the associated mode by using an oblique unfolding of the Volterra kernel. Keeping in mind that the complexity of the full HOSVD for a cubic (I × I × I) unstructured Volterra kernel needs $12I^{4}$ flops, our solution allows reducing the complexity to $2I^{4}$ flops, which leads to a gain equal to six for a sufficiently large size I. |
| Starting Page | 4080 |
| Ending Page | 4083 |
| File Size | 140243 |
| Page Count | 4 |
| File Format | |
| ISBN | 9781457705380 |
| ISSN | 15206149 |
| e-ISBN | 9781457705397 |
| e-ISBN | 9781457705373 |
| DOI | 10.1109/ICASSP.2011.5947249 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2011-05-22 |
| Publisher Place | Czech Republic |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Kernel Tensile stress Matrix decomposition Complexity theory Symmetric matrices Signal processing Computational modeling oblique unfolding Volterra kernel fast HOSVD |
| Content Type | Text |
| Resource Type | Article |
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