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» Performance and extension of user space file systems
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GLOBECOM
2006
IEEE
16 years 6 days 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
16 years 16 days 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
15 years 7 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
16 years 3 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»
15 years 6 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 ...