Naslov
Convex Optimization-based Beamforming in Cognitive Radio Multicast Transmission

Autori
Beko, Marko ; Tomic, Slavisa ; Dinis, Rui ; Lipovac, Vladimir

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the Vehicular Technology Conference 2012 - VTC 2012-Fall / - , 2012

Skup
Vehicular Technology Conference 2012 - VTC 2012-Fall

Mjesto i datum
Quebec, Kanada, 03.09.2012. - 06.09.2012

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
optimization; beamforming; cognitive radio

Sažetak
A novel algorithm for transmit beamforming to single cochannel multicast group is presented in this paper. We consider the max-min fairness (MMF) based beamforming problem where the maximization of the smallest receiver signal-to-noise ratio (SNR) over the secondary users subject to constraints on the transmit power and interference caused to the primary users. It is shown that this problem, which is nonconvex NP-hard, can be approximated by a convex second-order cone programming (SOCP) problem. Then, an iterative algorithm which successively improves the SOCP approximation is presented. Simulation results show the superior performance of the proposed approach, together with a reduced computational complexity, as compared to the state-of-the-art approach1.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

POVEZANOST RADA