IMPULSIVE NOISE CANCELLATION IN SYSTEMS WITH OFDM MODULATION

Stanislav Dlháň – Peter Farkaš

   Orthogonal Frequency Division Multiplex (OFDM) is recently widely used in many wireless and wire line communication systems. The parallelism between RS code and OFDM modulation with consecutive suppressed carriers is known. In this paper the capability of OFDM modulation to act as an error correcting code is analyzed if used for transmission over channel with impulsive noise. New decoding algorithms of OFDM-RS code are presented with emphasis on the low implementation complexity. The decoding and error correcting performance of these new algorithms has been evaluated in series of simulations. As the channel model for simulations, Power Line Communication channel has been selected. Results of these simulations are presented as well.

Keywords: orthogonal frequency-division multiplexing (OFDM), Reed-Solomon (RS) codes, Impulsive noise cancellation, multicarrier systems

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