Blind Principles Based Interference and Noise Reduction Schemes for OFDM

Authors:
M. G. Sriyananda;J. Joutsensalo;T. Hämäläinen
Affiliations:
Department of Mathematical Information Technology, Faculty of Information Technology, University of Jyväskylä, Finland 40014;Department of Mathematical Information Technology, Faculty of Information Technology, University of Jyväskylä, Finland 40014;Department of Mathematical Information Technology, Faculty of Information Technology, University of Jyväskylä, Finland 40014
Venue:
Wireless Personal Communications: An International Journal
Year:
2013

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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 or technique. A prominent role in the sphere of multicarrier communication is played by orthogonal frequency division multiplexing (OFDM) techniques. A set of remedial solutions taken to mitigate deteriorative effects caused within the air interface of an OFDM transmission with aid of BSS schemes is presented. Two energy functions are used in deriving the filter coefficients. They are optimized and performance is justified. These functions with the 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 colored noise and interference components to be removed from the signal mixture at the receiver. The method 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 solutions can be noted as quite low computational complexity mechanisms.