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Achievable rates in cognitive radio channels

Publication ,  Journal Article
Devroye, N; Mitran, P; Tarokh, V
Published in: IEEE Transactions on Information Theory
May 1, 2006

Cognitive radio promises a low-cost, highly flexible alternative to the classic single-frequency band, single-protocol wireless device. By sensing and adapting to its environment, such a device is able to fill voids in the wireless spectrum and can dramatically increase spectral efficiency. In this paper, the cognitive radio channel is defined as a two-sender, two-receiver interference channel in which sender 2 obtains the encoded message sender 1 plans to transmit. We consider two cases: in the genie-aided cognitive radio channel, sender 2 is noncausally presented the data to be transmitted by sender 1 while in the causal cognitive radio channel, the data is obtained causally. The cognitive radio at sender 2 may then choose to transmit simultaneously over the same channel, as opposed to waiting for an idle channel as is traditional for a cognitive radio. Our main result is the development of an achievable region which combines Gel'fand-Pinkser coding with an achievable region construction for the interference channel. In the additive Gaussian noise case, this resembles dirty-paper coding, a technique used in the computation of the capacity of the Gaussian multiple-input multiple-output (MIMO) broadcast channel. Numerical evaluation of the region in the Gaussian noise case is performed, and compared to an inner bound, the interference channel, and an outer bound, a modified Gaussian MIMO broadcast channel. Results are also extended to the case in which the message is causally obtained. © 2006 IEEE.

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Published In

IEEE Transactions on Information Theory

DOI

ISSN

0018-9448

Publication Date

May 1, 2006

Volume

52

Issue

5

Start / End Page

1813 / 1827

Related Subject Headings

  • Networking & Telecommunications
  • 4613 Theory of computation
  • 4006 Communications engineering
  • 1005 Communications Technologies
  • 0906 Electrical and Electronic Engineering
  • 0801 Artificial Intelligence and Image Processing
 

Citation

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Devroye, N., Mitran, P., & Tarokh, V. (2006). Achievable rates in cognitive radio channels. IEEE Transactions on Information Theory, 52(5), 1813–1827. https://doi.org/10.1109/TIT.2006.872971
Devroye, N., P. Mitran, and V. Tarokh. “Achievable rates in cognitive radio channels.” IEEE Transactions on Information Theory 52, no. 5 (May 1, 2006): 1813–27. https://doi.org/10.1109/TIT.2006.872971.
Devroye N, Mitran P, Tarokh V. Achievable rates in cognitive radio channels. IEEE Transactions on Information Theory. 2006 May 1;52(5):1813–27.
Devroye, N., et al. “Achievable rates in cognitive radio channels.” IEEE Transactions on Information Theory, vol. 52, no. 5, May 2006, pp. 1813–27. Scopus, doi:10.1109/TIT.2006.872971.
Devroye N, Mitran P, Tarokh V. Achievable rates in cognitive radio channels. IEEE Transactions on Information Theory. 2006 May 1;52(5):1813–1827.

Published In

IEEE Transactions on Information Theory

DOI

ISSN

0018-9448

Publication Date

May 1, 2006

Volume

52

Issue

5

Start / End Page

1813 / 1827

Related Subject Headings

  • Networking & Telecommunications
  • 4613 Theory of computation
  • 4006 Communications engineering
  • 1005 Communications Technologies
  • 0906 Electrical and Electronic Engineering
  • 0801 Artificial Intelligence and Image Processing