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16 years 3 months ago
Rollout Sampling Approximate Policy Iteration
Several researchers have recently investigated the connection between reinforcement learning and classification. We are motivated by proposals of approximate policy iteration schem...
Christos Dimitrakakis, Michail G. Lagoudakis
PIMRC
2008
IEEE
16 years 15 days ago
Iterative EM based channel estimation for KSP-OFDM
Abstract—This paper proposes a new iterative channel estimation algorithm for known symbol padding (KSP) Orthogonal Frequency Division Multiplexing (OFDM) based on the Expectatio...
Dieter Van Welden, Heidi Steendam
GLOBECOM
2006
IEEE
16 years 5 days ago
An Iterative QR-SIC Receiver for Concatenated Space Frequency Coding Schemes in Severe Multipath Channels
Abstract—This paper studies an efficient receiver design for concatenated space-frequency coded orthogonal frequency division multiplexing (OFDM) systems under severe multipath c...
Tung X. Lai, Siva D. Muruganathan, Abu B. Sesay
CRYPTO
2004
Springer
79views Cryptology» more  CRYPTO 2004»
15 years 11 months ago
Multicollisions in Iterated Hash Functions. Application to Cascaded Constructions
Abstract. In this paper, we study the existence of multicollisions in iterated hash functions. We show that finding multicollisions, i.e. r-tuples of messages that all hash to the...
Antoine Joux
ECSQARU
2003
Springer
15 years 11 months ago
On Iterated Revision in the AGM Framework
While AGM belief revision identifies belief states with sets of formulas, proposals for iterated revision are usually based on more complex belief states. In this paper we investi...
Andreas Herzig, Sébastien Konieczny, Lauren...