Title :
On the energy efficiency of orthogonal signaling
Author :
Gursoy, Mustafa Cenk
Author_Institution :
Dept. of Electr. Eng., Univ. of Nebraska-Lincoln, Lincoln, NE
Abstract :
In this paper, transmission over the additive white Gaussian noise (AWGN) channel, and coherent and noncoherent fading channels using M-ary orthogonal frequency-shift keying (FSK) or on-off frequency-shift keying (OOFSK) is considered. The receiver is assumed to perform hard-decision detection. In this setting, energy required to reliably send one bit of information is investigated. It is shown that for fixed M and duty cycle, bit energy requirements grow without bound as the signal-to-noise ratio (SNR) vanishes. The minimum bit energy values are numerically obtained for different values of M and the duty cycle. The impact of fading on the energy efficiency is identified. Requirements to approach the minimum bit energy of -1.59 dB are determined.
Keywords :
AWGN channels; fading channels; frequency shift keying; AWGN channel; M-ary orthogonal frequency-shift keying; additive white Gaussian noise; fading channel; minimum bit energy; on-off frequency-shift keying; orthogonal signaling; signal-to-noise ratio; AWGN channels; Additive white noise; Covariance matrix; Energy efficiency; Fading; Frequency shift keying; Gaussian noise; Pulse modulation; Signal detection; Transmitters;
Conference_Titel :
Information Theory, 2008. ISIT 2008. IEEE International Symposium on
Conference_Location :
Toronto, ON
Print_ISBN :
978-1-4244-2256-2
Electronic_ISBN :
978-1-4244-2257-9
DOI :
10.1109/ISIT.2008.4595056
