483 search results - page 61 / 97 » On perfectness of sums of graphs |
104
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STOC
2005
ACM
15 years 11 months ago
2005
ACM
We introduce a new graph parameter, called the Grothendieck constant of a graph G = (V, E), which is defined as the least constant K such that for every A : E R, sup f:V S|V |-1 ...
105
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CISS
2008
IEEE
15 years 5 months ago
2008
IEEE
—In this paper, we propose a low complexity linear multiuser beamforming system for the multiple-input multipleoutput (MIMO) broadcast channel. We consider the specific case of ...
GLOBECOM
2007
IEEE
15 years 5 months ago
2007
IEEE
— In this paper, we study a wireless multiple-input multiple-output system in a Rayleigh flat-fading environment with correlation among the transmit antennas. We assume that the...
JSAC
2007
14 years 10 months ago
2007
Abstract— We consider both the single-user and the multiuser power allocation problems in MIMO systems, where the receiver side has the perfect channel state information (CSI), a...
TWC
2008
14 years 10 months ago
2008
OFDMA resource allocation assigns subcarriers and power, and possibly data rates, to each user. Previous research efforts to optimize OFDMA resource allocation with respect to comm...