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» Performance and extension of user space file systems
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GLOBECOM
2006
IEEE
15 years 3 months ago
Two Novel Iterative Joint Frequency-Offset and Channel Estimation Methods for OFDMA Uplink
—We address joint estimation of frequency offsets and channel responses in OFDMA uplink. A cyclically equal-spaced, equal-energy interleaved pilot preamble is proposed by which t...
Xiaoyu Fu, Hlaing Minn, Cyrus D. Cantrell
WCNC
2008
IEEE
15 years 4 months ago
Distributed Energy Efficient Spectrum Access in Wireless Cognitive Radio Sensor Networks
—In this paper, a wireless cognitive radio sensor network is considered, where each sensor node is equipped with cognitive radio and the network is a multi-carrier system operati...
Song Gao, Lijun Qian, Dhadesugoor R. Vaman
NSDI
2004
14 years 11 months ago
Path-Based Failure and Evolution Management
We present a new approach to managing failures and evolution in large, complex distributed systems using runtime paths. We use the paths that requests follow as e through the syst...
Mike Y. Chen, Anthony Accardi, Emre Kiciman, David...
EUROSYS
2009
ACM
15 years 7 months ago
Orchestra: intrusion detection using parallel execution and monitoring of program variants in user-space
In a Multi-Variant Execution Environment (MVEE), several slightly different versions of the same program are executed in lockstep. While this is done, a monitor compares the behav...
Babak Salamat, Todd Jackson, Andreas Gal, Michael ...
ETT
2006
79views Education» more  ETT 2006»
14 years 9 months ago
On time-varying cyclic delay diversity
: Cyclic Delay Diversity (CDD) was introduced in 2001 to obtain spatial diversity in an Orthogonal Division Multiplexing (OFDM) based transmission system. In contrast to Space-Time...
Gerd Richter, Martin Bossert, Elena Costa, Martin ...