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An equalization technique for orthogonal frequency-division multiplexing systems in time-variant multipath channels

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3 Author(s)
Won Gi Jeon ; Dept. of Electr. Eng., Chungang Univ., Seoul, South Korea ; Kyung Hi Chang ; Yong Soo Cho

A loss of subchannel orthogonality due to time-variant multipath channels in orthogonal frequency division multiplexing (OFDM) systems leads to interchannel interference (ICI) which increases the error floor in proportion to the Doppler frequency. A simple frequency-domain equalization technique which can compensate for the effect of ICI in a multipath fading channel is proposed. In this technique, the equalization of the received OFDM signal is achieved by using the assumption that the channel impulse response (CIR) varies in a linear fashion during a block period and by compensating for the ICI terms that significantly affect the bit-error rate (BER) performance

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Communications, IEEE Transactions on  (Volume:47 ,  Issue: 1 )