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Symbol rate is one of the most important parameters of digital modulation signals. The estimation of symbol rate is deeply researched by the use of the cyclic autocorrelation. The paper deduced that the amplitudes of MPSK signals’ cyclic autocorrelation values reach maximum when the delay was a half of the symbol rate, and then put forward a new algorithm of estimating symbol rate. Simulations show...
The deadlock resolution problem can be informally stated as follows. There exists a set of actions, generated at different times, with some complex and contradictory precedence constraints between their executions. To resolve a deadlock, some of the actions need to be aborted; this enables to execute the remaining ones. This problem naturally arises in the context of distributed systems, e.g. communication...
The cryptographic security of the Merkle-Hellman cryptosystem has been a major open problem since 1976. In this paper we show that the basic variant of this cryptosystem, in which the elements of the public key are modular multiples of a superincreasing sequence, is breakable in polynomial time.
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