Joint rate and power control for coded cognitive radio networks

Ketan Rajawat, Emiliano Dall'Anese, Georgios B. Giannakis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A cross-layer design in the presence of an underlying indeterminacy of propagation channels and interference levels is formulated for wireless cognitive networks, where the nodes are allowed to perform network coding. In lieu of full inter-system cooperation, statistics of signal-to-noise-plus- interference ratios (SINRs) and interference levels are leveraged to obtain optimal end-to-end session rates, network code design variables, and transmit-powers, while sharing spectral resources with incumbent primary systems in an underlay setup. Solution of the formulated optimization problem is hard to approach, mostly because of a lack of tractability of the resultant SINR distributions. Nonetheless, suitable approximations are employed to obtain an approximate convex problem, amenable to efficient solution. Numerical tests verify the ability of the proposed scheme to adapt network and physical layer parameters to the propagation environment.

Original languageEnglish (US)
Title of host publicationConference Record of the 45th Asilomar Conference on Signals, Systems and Computers, ASILOMAR 2011
Pages1638-1642
Number of pages5
DOIs
StatePublished - Dec 1 2011
Event45th Asilomar Conference on Signals, Systems and Computers, ASILOMAR 2011 - Pacific Grove, CA, United States
Duration: Nov 6 2011Nov 9 2011

Publication series

NameConference Record - Asilomar Conference on Signals, Systems and Computers
ISSN (Print)1058-6393

Other

Other45th Asilomar Conference on Signals, Systems and Computers, ASILOMAR 2011
CountryUnited States
CityPacific Grove, CA
Period11/6/1111/9/11

Keywords

  • Cognitive radio networks
  • cross-layer optimization
  • network coding
  • outage probability
  • power control

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