755 search results - page 12 / 151 » Online selection of diverse results |
ICC
2007
IEEE
15 years 3 months ago
2007
IEEE
Abstract— We introduce the concept of fairness at the physicallayer in amplify and forward cooperative diversity systems, which reflects the need for equally allocating the cons...
ICML
2005
IEEE
15 years 10 months ago
2005
IEEE
Online feature selection (OFS) provides an efficient way to sort through a large space of features, particularly in a scenario where the feature space is large and features take a...
JCM
2008
14 years 9 months ago
2008
This paper analyzes the influence of time-varying cyclic delay diversity (TV-CDD) on the channel fading correlation properties in orthogonal frequency division multiplexing (OFDM) ...
74
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ICC
2007
IEEE
15 years 3 months ago
2007
IEEE
Abstract— In this paper, we propose a frequency domain adaptive estimation of Doppler shifts for multiple Doppler subpaths in direct sequence code division multiple access (DS-CD...
149
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SIGMOD
2007
ACM
15 years 9 months ago
2007
ACM
Database queries are often exploratory and users often find their queries return too many answers, many of them irrelevant. Existing work either categorizes or ranks the results t...