Blind identification using channel order estimation: Subspace approach based on CGM

N. Tanabe, Toshihiro Furukawa, K. Sakaniwa, S. Tsujii

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Subspace methods (SSM) are an effective approach for blind identification. However, these methods have two major disadvantages: i) they require a large amount of computation for the eigen-value decomposition (EVD) and the singular-value decomposition (SVD), what is more, ii) they require the prior knowledge of accurate channel order. In this paper, we discuss a new algorithm for blind identification using the property of conjugate gradient method (CGM) and using the conception of principal component analysis (PCA), which is based on the orthogonality between the subspaces spanned by the column vectors of the impulse response matrix (the impulse response subspace) and the noise subspace. The new algorithm does not need calculation of both EVD and SVD, and still more the prior knowledge of accurate channel order is unnecessary. Furthermore, the new algorithm has computations O(m2) where m is the data vector length. We show the effectiveness of the proposed method by numerical example.

Original languageEnglish
Title of host publicationProceedings of 2002 IEEE 10th Digital Signal Processing Workshop, DSP 2002 and 2nd Signal Processing Education Workshop, SPE 2002
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages24-28
Number of pages5
ISBN (Electronic)0780381165, 9780780381162
DOIs
Publication statusPublished - 1 Jan 2002
Event10th IEEE Digital Signal Processing Workshop, DSP 2002 and the 2nd IEEE Workshop on Signal Processing Education, SPE 2002 - Pine Mountain, United States
Duration: 13 Oct 200216 Oct 2002

Publication series

NameProceedings of 2002 IEEE 10th Digital Signal Processing Workshop, DSP 2002 and 2nd Signal Processing Education Workshop, SPE 2002

Conference

Conference10th IEEE Digital Signal Processing Workshop, DSP 2002 and the 2nd IEEE Workshop on Signal Processing Education, SPE 2002
CountryUnited States
CityPine Mountain
Period13/10/0216/10/02

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Tanabe, N., Furukawa, T., Sakaniwa, K., & Tsujii, S. (2002). Blind identification using channel order estimation: Subspace approach based on CGM. In Proceedings of 2002 IEEE 10th Digital Signal Processing Workshop, DSP 2002 and 2nd Signal Processing Education Workshop, SPE 2002 (pp. 24-28). [1231069] (Proceedings of 2002 IEEE 10th Digital Signal Processing Workshop, DSP 2002 and 2nd Signal Processing Education Workshop, SPE 2002). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/DSPWS.2002.1231069