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132
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CORR
2010
Springer
15 years 7 months ago
2010
Springer
Sigma-Delta modulation is a popular method for analog-to-digital conversion of bandlimited signals that employs coarse quantization coupled with oversampling. The standard mathema...
196
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CORR
2010
Springer
15 years 7 months ago
2010
Springer
A Direct Sum Theorem holds in a model of computation, when for every problem solving some k input instances together is k times as expensive as solving one. We show that Direct Su...
170
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CORR
2008
Springer
15 years 7 months ago
2008
Springer
Harvesting energy from ambient vibration is proposed as an alternative to storage based power supplies for autonomous systems. The system presented converts the mechanical energy ...
184
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CORR
2010
Springer
15 years 7 months ago
2010
Springer
This paper examines the ability of greedy algorithms to estimate a block sparse parameter vector from noisy measurements. In particular, block sparse versions of the orthogonal mat...
193
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CORR
2008
Springer
15 years 7 months ago
2008
Springer
A new random geometric graph model, the so-called secrecy graph, is introduced and studied. The graph represents a wireless network and includes only edges over which secure commun...