Channel capacity in bits per joule

Underwater acoustic telemetry has a total input energy constraint, since the energy is stored in the transmitter's batteries. This work is primarily rephrasing the work in channel capacity in terms of C_{J} bit/J as compared to C bit/s, to emphasize the energy efficiency and to deemphasize the...

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Published in:IEEE journal of oceanic engineering 1986-01, Vol.11 (1), p.97-99
Main Authors: Hyuck Kwon, Birdsall, T.
Format: Article
Language:English
Subjects:
Batteries
Channel capacity
Energy efficiency
Frequency shift keying
Optical distortion
Optical modulation
Optical noise
Optical transmitters
Pulse modulation
Telemetry
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description Underwater acoustic telemetry has a total input energy constraint, since the energy is stored in the transmitter's batteries. This work is primarily rephrasing the work in channel capacity in terms of C_{J} bit/J as compared to C bit/s, to emphasize the energy efficiency and to deemphasize the speed of the telemetry. The energy channel capacity C_{J} , for any waveform channel with well-defined capacity C bit/s at signal power S watts, is defined as C/S bit/J. It is shown that for coherent binary frequency shift keying (BFSK) and waveform channels, the supremum of C_{J} over S is approached as S approaches zero. For the Gaussian channel the best coding uses narrow bands with the highest S/N.
doi_str_mv 10.1109/JOE.1986.1145138
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source IEEE Electronic Library (IEL) Journals
subjects Batteries
Channel capacity
Energy efficiency
Frequency shift keying
Optical distortion
Optical modulation
Optical noise
Optical transmitters
Pulse modulation
Telemetry
title Channel capacity in bits per joule
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