Intersymbol and Intercarrier Interference in OFDM Transmissions Through Highly Dispersive Channels

This work quantifies intersymbol and intercarrier interference induced by very dispersive channels in OFDM systems. The resulting achievable data rate for suboptimal OFDM transmissions is derived based on the computation of the actual signal-to-interference-plus-noise ratio for arbitrary length finite duration channel impulse responses. Simulation results point to significant differences between data rates obtained via conventional formulations, for which interference is supposed to be limited to two or three blocks, versus the data rates considering the actual channel dispersion.

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