Broad-band fading channels: Signal burstiness and capacity

@article{Subramanian2002BroadbandFC,
  title={Broad-band fading channels: Signal burstiness and capacity},
  author={Vijay G. Subramanian and Bruce E. Hajek},
  journal={IEEE Trans. Information Theory},
  year={2002},
  volume={48},
  pages={809-827}
}
Médard and Gallager recently showed that very large bandwidths on certain fading channels cannot be effectively used by direct sequence or related spread-spectrum systems. This paper complements the work of Médard and Gallager. First, it is shown that a key information-theoretic inequality of Médard and Gallager can be directly derived using the theory of capacity per unit cost, for a certain fourth-order cost function, called fourthegy. This provides insight into the tightness of the bound… CONTINUE READING
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