Rethinking capacity per unit cost

Verdú's seminal work offers an elegant characterization of capacity per unit cost, but many results hold only when a cost-free input symbol is available. Furthermore, optimal transmission strategies under such scenarios typically result in infinitesimal spectral efficiency. We argue that the e...

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Bibliographic Details
Main Authors: Nokleby, M, Aazhang, B
Format: Conference Proceeding
Language:English
Subjects:
AWGN
AWGN channels
Channel capacity
Cost function
Interference channels
Receivers
Wireless communication
Online Access:Request full text
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Summary:Verdú's seminal work offers an elegant characterization of capacity per unit cost, but many results hold only when a cost-free input symbol is available. Furthermore, optimal transmission strategies under such scenarios typically result in infinitesimal spectral efficiency. We argue that the existence of a cost-free symbol is unrealistic and that the resulting low-rate transmission policies are not applicable to narrowband systems. We therefore examine capacity per cost when no cost-free symbol is available. In this case, the corresponding transmission rates are bounded away from zero. Specifically we propose a cost function for wireless channels that balances both energy and temporal costs. Using this cost function, we explore the capacity per cost regions of single- and multiple-user channels.
ISSN:1058-6393
2576-2303
DOI:10.1109/ACSSC.2010.5757604