Spectral efficiency in the wideband regime

Author

Verdú, Sergio

Author_Institution

Dept. of Electr. Eng., Princeton Univ., NJ, USA

Volume

48

Issue

6

fYear

2002

fDate

6/1/2002 12:00:00 AM

Firstpage

1319

Lastpage

1343

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

Keywords

AWGN channels; broadband networks; channel capacity; multi-access systems; multiuser channels; spectral analysis; AWGN channel; additive white Gaussian noise channel; antenna arrays; channel capacity; energy-per-information bit; finite-bandwidth communication; multiaccess channels; reliable communication; signaling; spectral efficiency; wideband power-limited regime; AWGN; Additive white noise; Bandwidth; Channel capacity; Cost function; Fading; Frequency; Gaussian noise; Signal to noise ratio; Wideband;

fLanguage

English

Journal_Title

Information Theory, IEEE Transactions on

Publisher

ieee

ISSN

0018-9448

Type

jour

DOI

10.1109/TIT.2002.1003824

Filename

1003824