An equalization technique for orthogonal frequency-divisionmultiplexing systems in time-variant multipath channels |
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Authors: | Won Gi Jeon Kyung Hi Chang Yong Soo Cho |
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Affiliation: | Dept. of Electr. Eng., Chungang Univ., Seoul; |
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Abstract: | 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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