TY - GEN
T1 - Distributed robust beamforming for MIMO cognitive networks
AU - Zhang, Yu
AU - Dall'Anese, Emiliano
AU - Giannakis, Georgios B.
PY - 2012
Y1 - 2012
N2 - Beamforming for multi-input multi-output (MIMO) cognitive networks is considered in the presence of channel uncertainty induced by errors in estimating cognitive-to-primary channels. A robust beamforming problem is formulated to optimize an appropriate cognitive radio network-wide performance metric, while enforcing protection of the primary system. In spite of the non-convexity of the resultant optimization problem, a block coordinate ascent algorithm is developed with provable convergence to a stationary point. Enticingly, the novel scheme also lends itself naturally to a distributed implementation. Numerical results are reported to corroborate the analytical findings.
AB - Beamforming for multi-input multi-output (MIMO) cognitive networks is considered in the presence of channel uncertainty induced by errors in estimating cognitive-to-primary channels. A robust beamforming problem is formulated to optimize an appropriate cognitive radio network-wide performance metric, while enforcing protection of the primary system. In spite of the non-convexity of the resultant optimization problem, a block coordinate ascent algorithm is developed with provable convergence to a stationary point. Enticingly, the novel scheme also lends itself naturally to a distributed implementation. Numerical results are reported to corroborate the analytical findings.
KW - MIMO cognitive networks
KW - beamforming
KW - channel uncertainty
KW - distributed computation
KW - robust optimization
UR - http://www.scopus.com/inward/record.url?scp=84867618651&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84867618651&partnerID=8YFLogxK
U2 - 10.1109/ICASSP.2012.6288535
DO - 10.1109/ICASSP.2012.6288535
M3 - Conference contribution
AN - SCOPUS:84867618651
SN - 9781467300469
T3 - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
SP - 2953
EP - 2956
BT - 2012 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2012 - Proceedings
T2 - 2012 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2012
Y2 - 25 March 2012 through 30 March 2012
ER -