375 search results - page 49 / 75 » Accessible Capacity of Secondary Users |
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ICS
2011
Tsinghua U.
14 years 1 months ago
2011
Tsinghua U.
With the fast technical improvement, flash memory based Solid State Drives (SSDs) are becoming an important part of the computer storage hierarchy to significantly improve perfo...
78
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PIMRC
2008
IEEE
15 years 4 months ago
2008
IEEE
—In this paper, the selective time division multiple access (S-TDMA) strategy is studied in the downlink channel. This strategy consists in transmitting data to the user with the...
GLOBECOM
2006
IEEE
15 years 4 months ago
2006
IEEE
— Mobile communication systems based on DS-CDMA suffer from multiple access interference (MAI), which limits the system capacity. Several techniques, such as beamforming with mul...
GLOBECOM
2008
IEEE
15 years 4 months ago
2008
IEEE
— In this paper, we study the weighted sum rate maximization of multicell cellular cognitive radio networks (CRNs) which are overlaid with multicell primary radio networks (PRNs)...
SIGIR
2000
ACM
15 years 2 months ago
2000
ACM
This article compares search effectiveness when using query-based Internet search (via the Google search engine), directory-based search (via Yahoo) and phrasebased query reformul...