Repository logo

Infoscience

  • English
  • French
Log In
Logo EPFL, École polytechnique fédérale de Lausanne

Infoscience

  • English
  • French
Log In
  1. Home
  2. Academic and Research Output
  3. Conferences, Workshops, Symposiums, and Seminars
  4. A Greedy Approach To The Distributed Karhunen-Loeve Transform
 
conference paper

A Greedy Approach To The Distributed Karhunen-Loeve Transform

Amar, Alon
•
Leshem, Amir
•
Gastpar, Michael  
2010
2010 Ieee International Conference On Acoustics, Speech, And Signal Processing
2010 IEEE International Conference on Acoustics, Speech, and Signal Processing

In the distributed linear source coding problem a set of distributed sensors observe subsets of a data vector, and provide the fusion center with linearly encoded data. The goal is to determine the encoding matrix of each sensor such that the fusion center reconstructs the entire data vector with minimum mean square error (MSE). The recently proposed local Karhunen Loeve transform (KLT) approach performs this task by optimally determining the encoding matrix of each sensor assuming the other matrices are fixed. This approach is implemented iteratively until convergence is reached. Herein, we propose a greedy-based non-iterative algorithm. In each step, one of the encoding matrices is updated by appending an additional row. The algorithm selects in a greedy fashion one sensor that provides the largest improvement in MSE, and terminates when all the encoding matrices reach their predefined encoded data size. The algorithm can be implemented recursively, and it reduces the complexity from cubic dependency on the data size, using the iterative method, to quadratic dependency. This makes it a prime candidate for on-line and real-time implementations of the distributed KLT. Simulation results show that for many covariance matrix types, the MSE performance of the suggested algorithm is equivalent to the iterative approach.

  • Details
  • Metrics
Type
conference paper
DOI
10.1109/ICASSP.2010.5496138
Web of Science ID

WOS:000287096002228

Author(s)
Amar, Alon
Leshem, Amir
Gastpar, Michael  
Date Issued

2010

Publisher

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa

Published in
2010 Ieee International Conference On Acoustics, Speech, And Signal Processing
ISBN of the book

978-1-4244-4296-6

Series title/Series vol.

International Conference on Acoustics Speech and Signal Processing ICASSP

Start page

2970

End page

2973

Subjects

Source coding

•

distributed Karhunen Loeve transform

•

principal component analysis

•

Information

Editorial or Peer reviewed

REVIEWED

Written at

OTHER

EPFL units
LINX  
Event nameEvent placeEvent date
2010 IEEE International Conference on Acoustics, Speech, and Signal Processing

Dallas, TX

Mar 14-19, 2010

Available on Infoscience
October 17, 2011
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/71604
Logo EPFL, École polytechnique fédérale de Lausanne
  • Contact
  • infoscience@epfl.ch

  • Follow us on Facebook
  • Follow us on Instagram
  • Follow us on LinkedIn
  • Follow us on X
  • Follow us on Youtube
AccessibilityLegal noticePrivacy policyCookie settingsEnd User AgreementGet helpFeedback

Infoscience is a service managed and provided by the Library and IT Services of EPFL. © EPFL, tous droits réservés