OFDM IS AN ERROR CONTROL CODE

Peter Farkaš

   In this paper it is shown, that it is possible to interpret the OFDM as an error control code (for example Reed Solomon code) defined over real, complex or extended rational fields. The redundancy in OFDM is introduced by not selecting all frequencies in the IDFT or DFT block for transmission. It opens up an opportunity to increase the reliability of the transmitted information by decoding the received channel symbols as encoded using error-control code and so exploit for error control the redundancy introduced by the transmitter into OFDM by not selecting all possible frequencies.

Keywords: OFDM, Reed Solomon Code, complex numbers, real numbers, rational numbers

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