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Circuit-aware cognitive radios for energy-efficient communications

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Chen, Yunfei, Nossek, Josef A. and Mezghani, Amine (2013) Circuit-aware cognitive radios for energy-efficient communications. IEEE Wireless Communications Letters, 2 (3). pp. 323-326. doi:10.1109/WCL.2013.032013.130026

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Official URL: http://dx.doi.org/10.1109/WCL.2013.032013.130026

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Abstract

In this letter, the tradeoff between sensing and throughput is studied for cognitive radios by considering the energy consumed in the circuit. The total energy is minimized with respect to the power fractions of the power amplifier and the low noise amplifier, the bit resolution of the analog-to-digital converter, the input backoff of the power amplifier and the sensing time in spectrum sensing, for a fixed achievable number of bits per packet. Numerical results show that the optimal sensing time increases when the circuit energy is considered. They also show that the analog-to-digital converter consumes more energy and that it is advantageous to operate the power amplifier at high input backoffs in cognitive radios.

Item Type: Journal Article
Divisions: Faculty of Science > Physics
Journal or Publication Title: IEEE Wireless Communications Letters
Publisher: IEEE
ISSN: 2162-2337
Official Date: June 2013
Dates:
DateEvent
June 2013Published
28 March 2013Accepted
Volume: 2
Number: 3
Page Range: pp. 323-326
DOI: 10.1109/WCL.2013.032013.130026
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

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