Sciweavers

19383 search results - page 38 / 3877
» Estimating the
Sort
View
64
Voted
JACM
2011
98views more  JACM 2011»
14 years 4 months ago
Randomized algorithms for estimating the trace of an implicit symmetric positive semi-definite matrix
We analyze the convergence of randomized trace estimators. Starting at 1989, several algorithms have been proposed for estimating the trace of a matrix by 1 M M i=1 zT i Azi, where...
Haim Avron, Sivan Toledo
TWC
2010
14 years 4 months ago
On the Impact of Channel Estimation Errors on MAC Protocols for MIMO Ad Hoc Networks
In this paper, we evaluate the performance of a Medium Access Control (MAC) protocol for MIMO ad hoc networks under imperfect channel estimation. To this end, we also present an an...
Davide Chiarotto, Paolo Casari, Michele Zorzi
CIKM
2011
Springer
13 years 9 months ago
Estimating selectivity for joined RDF triple patterns
A fundamental problem related to RDF query processing is selectivity estimation, which is crucial to query optimization for determining a join order of RDF triple patterns. In thi...
Hai Huang 0003, Chengfei Liu
CORR
2007
Springer
123views Education» more  CORR 2007»
14 years 9 months ago
Channel Capacity Estimation using Free Probability Theory
—In many channel measurement applications, one needs to estimate some characteristics of the channels based on a limited set of measurements. This is mainly due to the highly tim...
Øyvind Ryan, Mérouane Debbah
ICIP
2005
IEEE
15 years 11 months ago
Hybrid recursive energy-based method for robust optical flow on large motion fields
We present a new reliable hybrid recursive method for optical flow estimation. The method efficiently combines the advantage of discrete motion estimation and optical flow estimati...
Jangheon Kim, Thomas Sikora