4934 search results - page 624 / 987 » complexity 2008 |
194
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TWC
2008
15 years 6 months ago
2008
We combine space-time coding and transmit beamforming over multiple-antenna quasi-static fading channels using resolution-constrained channel state information at the transmitter ...
175
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TWC
2008
15 years 6 months ago
2008
In this paper, a dynamic subcarrier and power allocation problem is considered in the context of asymptotic utility maximization in multi-carrier systems. Using the gradient-based...
183
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TWC
2008
15 years 6 months ago
2008
In this paper, we investigate an optimal power loading algorithm for an OFDM-based cognitive radio (CR) system. The downlink transmission capacity of the CR user is thereby maximiz...
190
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TWC
2008
15 years 6 months ago
2008
This paper discusses the design and analysis of post coded OFDM (PC-OFDM) systems. Coded or precoded OFDM systems are generally employed to overcome the symbol recovery problem in...
159
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URBAN
2008
15 years 6 months ago
2008
Rough set theory has been primarily known as a mathematical approach for analysis of a vague description of objects. This paper explores the use of rough set theory to manage the ...