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Spectral efficiency in the wideband regime

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1 Author(s)
Verdu, S. ; Dept. of Electr. Eng., Princeton Univ., NJ, USA

The tradeoff of spectral efficiency (b/s/Hz) versus energy-per-information bit is the key measure of channel capacity in the wideband power-limited regime. This paper finds the fundamental bandwidth-power tradeoff of a general class of channels in the wideband regime characterized by low, but nonzero, spectral efficiency and energy per bit close to the minimum value required for reliable communication. A new criterion for optimality of signaling in the wideband regime is proposed, which, in contrast to the traditional criterion, is meaningful for finite-bandwidth communication

Published in:

Information Theory, IEEE Transactions on  (Volume:48 ,  Issue: 6 )

Date of Publication:

Jun 2002

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