Abstract-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.
In REF , optimal strategies are illustrated to minimize the energy per bit required for reliable transmission in the wideband regime.
Spectral Efficiency in the Wideband Regime
IEEE Trans. Inf. Theory
IEEE Trans. Inf. Theory
Computer Science