Alcatel N.v.

Alcatel Cit

Charles Eldering

Francois Marcel

Serge Allaire

Fernando H Martin

A method for data recovery in burst mode communication systems that include a data signal having a burst preamble with a defined sequence of m bits, by sampling in a first sampling step (2) the burst preamble with n samples per bit carried out by n bit clocks with different phases, and providing a sampled burst preamble. The method is characterized in that it further comprises the steps of correlating in a correlation step (3) the sampled burst preamble with at least n representations of the defined sequence of m-bits of the burst preamble also sampled at n times per bit, each of said at least n representations being delayed one sample clock period with respect to a previous one of said at least n representations in order to obtain at least n time-shifted correlation results; determining in a decision step (4) an optimum phase clock and a first received data bit based on which of said at least n time-shifted correlation results has a greatest value; and regenerating in a regeneration step (5) a sampled data signal sampled at an optimum instant in accordance with the optimum phase clock.

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Charles Eldering