Graduate School and Research Center in Digital Sciences

Rate optimal power policies in underlay cognitive radios with limited channel feedback

Ropokis, Georgios; Gesbert, David; Berberidis, K

PIMRC 2013, IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, 08-11 September 2013, London, United Kingdom

In this paper, two new power policies (PPs), namely the Rate Maximization Policy (RMP) and the Rate-Bound Maximization Policy (RBMP), for Cognitive Radio (CR) systems are developed based on an expected rate maximization criterion. Both policies are designed such as to satisfy a constraint related to the average interference caused by the CR network to primary communication. The key novelty here is that the proposed PPs take into account the existence of limited (hybrid) channel feedback, where the direct secondary channel is known instantaneously while the interference caused by the primary transmission to the secondary receiver is only known statistically. The optimal policy (RMP) is characterized, and a low complexity algorithm is presented that allows for its efficient and accurate implementation. The two policies are compared and RMP is shown to lead to substantial energy consumption savings at equal rate performance.

Document Doi Bibtex

Title:Rate optimal power policies in underlay cognitive radios with limited channel feedback
Keywords:Underlay Cognitive Radio, power policy, ergodic rate maximization, average interference constraint
Type:Conference
Language:English
City:London
Country:UNITED KINGDOM
Date:
Department:Communication systems
Eurecom ref:4166
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Bibtex: @inproceedings{EURECOM+4166, doi = {http://dx.doi.org/10.1109/PIMRC.2013.6666234}, year = {2013}, title = {{R}ate optimal power policies in underlay cognitive radios with limited channel feedback}, author = {{R}opokis, {G}eorgios and {G}esbert, {D}avid and {B}erberidis, {K}}, booktitle = {{PIMRC} 2013, {IEEE} 24th {A}nnual {I}nternational {S}ymposium on {P}ersonal, {I}ndoor, and {M}obile {R}adio {C}ommunications, 08-11 {S}eptember 2013, {L}ondon, {U}nited {K}ingdom}, address = {{L}ondon, {UNITED} {KINGDOM}}, month = {09}, url = {http://www.eurecom.fr/publication/4166} }
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