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Modified IQML and Weighted Subspace Fitting without Eigendecomposition
KTH, Superseded Departments (pre-2005), Signals, Sensors and Systems.
KTH, Superseded Departments (pre-2005), Signals, Sensors and Systems.ORCID iD: 0000-0002-6855-5868
KTH, Superseded Departments (pre-2005), Signals, Sensors and Systems.ORCID iD: 0000-0003-2298-6774
1999 (English)In: Signal Processing, ISSN 0165-1684, Vol. 79, no 1, p. 29-44Article in journal (Refereed) Published
Abstract [en]

This paper deals with direction estimation of signals impinging on a uniform linear sensor array. A well-known algorithm for this problem is IQML. However, estimates computed with IQML are in general biased, especially in noisy scenarios. We propose a modification of IQML (MIQML) that gives consistent estimates at approximately the same computational cost. In addition, an algorithm (WSF-E) with an estimation error covariance which is asymptotically identical to the asymptotic Cramér–Rao lower bound is presented. The WSF-E algorithm resembles weighted subspace fitting (WSF) or MODE, but achieves optimal performance without having to compute an eigendecomposition of the sample covariance matrix.

Place, publisher, year, edition, pages
Elsevier North-Holland, Inc. Amsterdam, The Netherlands , 1999. Vol. 79, no 1, p. 29-44
Keywords [en]
Direction estimation; Linear array; Maximum likelihood; Subspace methods; Eigendecomposition; Low complexity
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:kth:diva-59759DOI: 10.1016/S0165-1684(99)00078-XISI: 000083400800003Scopus ID: 2-s2.0-0033355541OAI: oai:DiVA.org:kth-59759DiVA, id: diva2:476228
Note
NR 20140805Available from: 2012-01-11 Created: 2012-01-11 Last updated: 2022-06-24Bibliographically approved

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Jansson, MagnusOttersten, Björn

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CiteExportLink to record
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Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf