dc.creator | Matskani, E. | en |
dc.creator | Sidiropoulos, N. D. | en |
dc.creator | Luo, Z. Q. | en |
dc.creator | Tassiulas, L. | en |
dc.date.accessioned | 2015-11-23T10:39:04Z | |
dc.date.available | 2015-11-23T10:39:04Z | |
dc.date.issued | 2007 | |
dc.identifier.isbn | 9781424409556 | |
dc.identifier.isbn | 1424409551 | |
dc.identifier.uri | http://hdl.handle.net/11615/30780 | |
dc.description.abstract | Multiuser downlink beamforming under quality of service (QoS) constraints has attracted considerable interest in recent years, because it is particularly appealing from a network operator's perspective (e.g., UMTS, 802.16e). When there are many co-channel users and/or the service constraints are stringent, the problem becomes infeasible and some form of admission control is necessary. We advocate a cross-layer approach to joint multiuser transmit beamforming and admission control, aiming to maximize the number of users that can be served at their desired QoS. The problem is NP-hard; we propose and motivate a deflation approach based on second-order cone relaxation. For a moderate number of users, we benchmark the proposed algorithm against the optimal enumeration-based solution and a simpler approach, using both simulated and measured channel data. Our results indicate that the proposed algorithm yields consistently close to optimal performance at an affordable complexity cost. © 2007 IEEE. | en |
dc.source.uri | http://www.scopus.com/inward/record.url?eid=2-s2.0-48049116896&partnerID=40&md5=b8216976cec3472a2ffe033f63c95760 | |
dc.subject | Beamforming | en |
dc.subject | Benchmarking | en |
dc.subject | Chlorine compounds | en |
dc.subject | Nuclear propulsion | en |
dc.subject | Signal processing | en |
dc.subject | Telecommunication | en |
dc.subject | Admission control | en |
dc.subject | Cross-layer approaches | en |
dc.subject | Deflation approach | en |
dc.subject | Measured channel | en |
dc.subject | Multi users | en |
dc.subject | Multi-user downlink beamforming | en |
dc.subject | Network operators | en |
dc.subject | Np-hard | en |
dc.subject | Optimal performances | en |
dc.subject | Quality of Service constraints | en |
dc.subject | Second-order cone | en |
dc.subject | Service constraints | en |
dc.subject | Transmit beamforming | en |
dc.subject | Wireless communications | en |
dc.subject | Quality of service | en |
dc.title | A second-order cone deflation approach to joint multiuser downlink beamforming and admission control | en |
dc.type | conferenceItem | en |