Pre-FFT equaliser design for OFDM
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Orthogonal frequency division multiplexing (OFDM) transmission in a time dispersive radio channel requires the insertion of a guard interval to combat inter-carrier interference. This insertion of the guard interval reduces the transmission efficiency. The pre-FFT equaliser design presented supplements or replaces the guard interval and thereby achieves a more efficient transmission.
[1] Yiyan Wu,et al. COFDM: an overview , 1995, IEEE Trans. Broadcast..