TY - GEN
T1 - Power allocation for cognitive radio networks under channel uncertainty
AU - Dall'Anese, Emiliano
AU - Kim, Seung Jun
AU - Giannakis, Georgios B.
AU - Pupolin, Silvano
PY - 2011
Y1 - 2011
N2 - Cognitive radio (CR) networks can re-use the RF spectrum licensed to the primary user (PU) network by carefully controlling the interference to the PUs. However, due to lack of explicit support from the PU system, CR sensing algorithms often face difficulty in acquiring CR-to-PU channels accurately. Moreover, the sensing algorithms cannot detect silent PU receivers, which nevertheless have to be protected. In order to achieve aggressive spectrum re-use even in such challenging scenarios, a CR power control problem with probabilistic interference constraints is formulated. Both log-normal shadowing and small-scale fading uncertainties are taken into account through suitable approximations. In particular, a weighted sum-rate maximization problem is considered, whose Karush-Kuhn-Tucker points are obtained via sequential geometric programming. Numerical tests verify the performance of our novel approach.
AB - Cognitive radio (CR) networks can re-use the RF spectrum licensed to the primary user (PU) network by carefully controlling the interference to the PUs. However, due to lack of explicit support from the PU system, CR sensing algorithms often face difficulty in acquiring CR-to-PU channels accurately. Moreover, the sensing algorithms cannot detect silent PU receivers, which nevertheless have to be protected. In order to achieve aggressive spectrum re-use even in such challenging scenarios, a CR power control problem with probabilistic interference constraints is formulated. Both log-normal shadowing and small-scale fading uncertainties are taken into account through suitable approximations. In particular, a weighted sum-rate maximization problem is considered, whose Karush-Kuhn-Tucker points are obtained via sequential geometric programming. Numerical tests verify the performance of our novel approach.
KW - Cognitive radio
KW - channel uncertainty
KW - geometric programming
KW - power control
UR - http://www.scopus.com/inward/record.url?scp=80052148309&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80052148309&partnerID=8YFLogxK
U2 - 10.1109/icc.2011.5963325
DO - 10.1109/icc.2011.5963325
M3 - Conference contribution
AN - SCOPUS:80052148309
SN - 9781612842332
T3 - IEEE International Conference on Communications
BT - 2011 IEEE International Conference on Communications, ICC 2011
T2 - 2011 IEEE International Conference on Communications, ICC 2011
Y2 - 5 June 2011 through 9 June 2011
ER -