System capacity of wideband OFDM communications over fading channels without channel knowledge

Authors

Dieter Schafhuber, Helmut Bölcskei, and Gerald Matz

Reference

Proc. of IEEE International Symposium on Information Theory (ISIT), Chicago, IL, USA, pp. 389, June 2004

DOI: 10.1109/ISIT.2004.1365426

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Abstract

Assuming PSK modulation, we derive an upper bound on the system capacity of pulse-shaped orthogonal frequency division multiplexing (OFDM) communications over time-frequency selective fading channels in the absence of channel state information at the transmitter and the receiver. We show that capacity tends to zero in the large bandwidth limit and quantify the impact of spread and shape of the scattering function on finite bandwidth capacity.

Keywords

OFDM, wideband capacity, scattering function

Correction in Eq. 2 compared to the version published in the proceedings. We thank Moritz Borgmann for pointing out the error in the original version.


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