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Author Payaró, Miquel ♦ Pascual-Iserte, Antonio ♦ Yuan, Jinhong ♦ Lagunas, Miguel Á.
Source CiteSeerX
Content type Text
File Format PDF
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Convex Optimization Approach ♦ Robust Power Allocation ♦ Robust Power Allocation Technique ♦ Convex Optimization Problem ♦ Imperfect Estimate ♦ Base Station ♦ Necessary Quality ♦ Downlink Communication Scheme ♦ Channel Uncertainty Region ♦ Present Simulation Result ♦ Certain Number ♦ Realistic Scenario ♦ Reliable Communication Link ♦ Common Case ♦ Channel Knowledge ♦ Transmission Scheme ♦ Multiple Antenna ♦ Actual Channel ♦ Single Antenna Terminal ♦ Channel Estimate ♦ Robust Design ♦ Transmits Information ♦ Transmitted Power ♦ Uncertainty Region ♦ Communication System
Description In this work, we study a downlink communications scheme, focusing our attention on the case where the base station is equipped with multiple antennas and transmits information simultaneously to a certain number of users with single antenna terminals. We consider a realistic scenario where an imperfect estimate of the actual channel is available at both communication ends. Precisely, the actual channel is assumed to be inside an uncertainty region, around the channel estimate, which models the imperfection of the channel knowledge. In this context, we propose a robust power allocation technique that minimizes the transmitted power, while maintaining the necessary quality of service to obtain reliable communication links between the base station and the users. This robust power allocation is obtained as the solution of a convex optimization problem, which is next particularized for two common cases of channel uncertainty regions, and which can be numerically solved very efficiently. Finally, we present simulation results to show the performance of the proposed transmission scheme. 1.
in Proc. SPAWC 2006
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study
Learning Resource Type Article
Publisher Date 2006-01-01