Name
Abstract | ||
|---|---|---|
We consider a robust downlink beamforming optimization problem for secondary multicast transmission in a multiple-input multiple-output (MIMO) spectrum sharing cognitive radio (CR) network. The minimization of transmit power is formulated subject to both quality-of-service (QoS) constraints on the secondary receivers and interference temperature constraints on the primary users, under the assumption of imperfect channel state information (CSI). The problem is a nonconvex quadratically constrained quadratic program (QCQP), and in general it is hard to achieve the global optimality. As a compromise, we present two randomized approximation algorithms for the problem via convex optimization techniques. Apart from the general setting of the robust beamforming problem, we identify one interesting special case, the robust problem of which can be solved efficiently. Simulation results are presented to demonstrate the performance gains of the proposed algorithms over an existing robust design. |
Year | DOI | Venue |
|---|---|---|
2012 | 10.1109/TSP.2011.2169061 | IEEE Transactions on Signal Processing |
Keywords | Field | DocType |
robust downlink,cognitive radio,general setting,spectrum sharing-based cognitive radios,existing robust design,optimization problem,robust multicast beamforming,secondary receiver,secondary multicast transmission,robust problem,convex optimization technique,robust beamforming problem,radio receivers,approximation theory,quadratic programming,convex optimization,approximation algorithms,convex programming,global optimization,quality of service,interference,robustness,cognitive radio network,spectrum,quadratically constrained quadratic program,channel state information | Beamforming,Mathematical optimization,Quadratically constrained quadratic program,MIMO,Robustness (computer science),Multicast,Quadratic programming,Optimization problem,Convex optimization,Mathematics | Journal |
Volume | Issue | ISSN |
60 | 1 | 1053-587X |
Citations | PageRank | References |
44 | 1.52 | 9 |
Authors | ||
4 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Yongwei Huang | 1 | 814 | 50.83 |
| Qiang Li | 2 | 525 | 30.90 |
| Wing-Kin Ma | 3 | 3370 | 192.34 |
| Shuzhong Zhang | 4 | 2808 | 181.66 |