Journal of Communications and Networks

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Blind Source Separation for OFDM with Filtering Colored Noise and Jamming Signal

  • Sriyananda, M.G.S. (Department of Mathematical Information Technology, Faculty of Information Technology, University of Jyvaskyla) ;
  • Joutsensalo, Jyrki (Department of Mathematical Information Technology, Faculty of Information Technology, University of Jyvaskyla) ;
  • Hamalainen, Timo
  • Received : 2011.03.30
  • Published : 2012.08.31
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Abstract

One of the premier mechanisms used in extracting unobserved signals from observed mixtures in signal processing is employing a blind source separation (BSS) algorithm. Orthogonal frequency division multiplexing (OFDM) techniques are playing a prominent role in the sphere of multicarrier communication. A set of remedial solutions taken to mitigate deteriorative effects caused within the air interface of OFDM transmission with aid of BSS schemes is presented. Four energy functions are used in deriving the filter coefficients. Energy criterion functions to be optimized and the performance is justified. These functions together with iterative fixed point rule for receive signal are used in determining the filter coefficients. Time correlation properties of the channel are taken advantage for BSS. It is tried to remove colored noise and jamming components from themixture at the receiver. Themethod is tested in a slow fading channel with a receiver containing equal gain combining to treat the channel state information values. The importance is that, these are quite low computational complexity mechanisms.

Keywords

References

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