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Structured non-linear noise behaviour and the use of median averaging in non-linear systems with m-sequence inputs
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Wong, Hin Kwan, Godfrey, Keith R. and Schoukens, Johan (2013) Structured non-linear noise behaviour and the use of median averaging in non-linear systems with m-sequence inputs. IET Control Theory & Applications, Volume 7 (Number 7). pp. 997-1004. doi:10.1049/iet-cta.2012.0622 ISSN 1751-8644.
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Official URL: http://dx.doi.org/10.1049/iet-cta.2012.0622
Abstract
In non-linear system identification, results from traditional non-parametric identification techniques contain both linear and non-linear contributions. When Gaussian excitation signals (including random-phased multisines) are used, the non-linear contributions are noise-like and therefore not easy to distinguish from environment noise and measurement noise. In contrast, when excitation signals based on binary maximum-length sequences (m-sequences) are used, a particular property of the sequences results in the non-linear contributions being structured. It is shown in this study that it is possible to take advantage of this structure by using a median-based averaging technique, rather than the more traditional arithmetic mean-based averaging, to obtain better identification performance.
Item Type: | Journal Article | ||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||
Journal or Publication Title: | IET Control Theory & Applications | ||||||
Publisher: | The Institution of Engineering and Technology | ||||||
ISSN: | 1751-8644 | ||||||
Official Date: | 18 July 2013 | ||||||
Dates: |
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Volume: | Volume 7 | ||||||
Number: | Number 7 | ||||||
Page Range: | pp. 997-1004 | ||||||
DOI: | 10.1049/iet-cta.2012.0622 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Restricted or Subscription Access |
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