International Journal of
Computer Engineering Research

  • Abbreviation: Int. J. Comput. Eng. Res.
  • Language: English
  • ISSN: 2141-6494
  • DOI: 10.5897/IJCER
  • Start Year: 2010
  • Published Articles: 29

Full Length Research Paper

Quality of service constrained task mapping and scheduling algorithm for wireless sensor networks

Medhat H. A. Awadalla1* and Rania R. Darwish2
1Department of Communication, Electronics and Computers, Faculty of Engineering, University of Helwan, Egypt. 2Department of Mechatronics, Faculty of Engineering, University of Helwan, Egypt.
Email: [email protected]

  •  Published: 27 February 2011


Blind Signal Separation is the task of separating signals when only their mixtures are observed. Recently, Independent Component Analysis has become a favorite method of researchers for attacking this problem. We propose a new score function based on Generalized Laplace Distribution for the problem of blind signal separation for supergaussian and subgaussian. To estimate the parameters of such score function we used Nelder-Mead algorithm for optimizing the maximum likelihood function of Generalized Laplace Distribution. To blindly extract the independent source signals, we resort to FastICA approach. Simulation results show that the proposed approach is capable of separating mixture of signals.


Key words: Independent component analysis (ICA), generalized laplace distribution (GLD), maximum likelihood (ML), Nelder-Mead (NM).