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94
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TWC
2008
143views more  TWC 2008»
15 years 13 days ago
Power-efficient wireless OFDMA using limited-rate feedback
Emerging applications involving low-cost wireless sensor networks motivate well optimization of multi-user orthogonal frequency-division multiple access (OFDMA) in the power-limite...
Antonio G. Marqués, Georgios B. Giannakis, ...
78
Voted
TWC
2008
98views more  TWC 2008»
15 years 13 days ago
Resource Allocation for Delay Differentiated Traffic in Multiuser OFDM Systems
Abstract-- Most existing work on adaptive allocation of subcarriers and power in multiuser OFDM systems has focused on homogeneous traffic consisting of delay-constrained data (gua...
Meixia Tao, Ying-Chang Liang, Fan Zhang
94
Voted
CCE
2004
15 years 12 days ago
Continuous reformulations of discrete-continuous optimization problems
This paper treats the solution of nonlinear optimization problems involving discrete decision variables, also known as generalized disjunctive programming (GDP) or mixed-integer n...
Oliver Stein, Jan Oldenburg, Wolfgang Marquardt
COMCOM
2004
94views more  COMCOM 2004»
15 years 12 days ago
An economic model for the radio resource management in multimedia wireless systems
In this paper, we study the connection between Radio Resource Management and economic parameters, whose application in multimedia communication system is a challenging task. In fa...
Leonardo Badia, Magnus Lindström, Jens Zander...
PC
2002
118views Management» more  PC 2002»
15 years 6 days ago
Parallel algorithms for indefinite linear systems
Saddle-point problems give rise to indefinite linear systems that are challenging to solve via iterative methods. This paper surveys two recent techniques for solving such problem...
Ahmed H. Sameh, Vivek Sarin