Iterative dual downlink beamforming for cognitive radio networks
Marius Pesavento, Dana Ciochina, Alex B. Gershman · 2010
We address the problem of multi-user downlink beamforming and power allocation in a cognitive radio (CR) secondary network (SN) with constraints on the total interference in the primary network (PN). We derive the Lagrange dual of the problem and show that both problems are equivalent. Two algorithm