Abstract-Cyclic prefix based equalizers are widely used for high-speed data transmission over frequency selective channels. Their use in conjunction with DFT filterbanks is especially attractive, given the low complexity of implementation. Some examples include the DFT-based DMT systems. In this paper we consider a general cyclic prefix based system for communication and show that the equalization performance can be improved by simple preand post-processing aimed at reducing the noise at the receiver. This processing is done independently of the ISI cancellation performed by the frequency domain equalizer. 1
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