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AssigneeMatra Nortel Communications
InventorsFabrice Jean-André Belveze, Florence Madeleine Chancel
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The method determines a deviation between a modulation frequency, combined with a first baseband signal to form a transmitted signal and a frequency used by the receiver to form a second baseband signal from a received signal, in order to adjust the frequency used by the receiver. Knowing a time segment of the first signal and the time position of a corresponding segment of the second signal, whereby the segments comprise N samples at a sample frequency Fe, a frequency transform Y(f), of size N, of the product of the complex conjugate of said segment of the first signal by the corresponding segment of the second signal is calculated, and the frequency deviation Δf which makes the frequency transform Y(f) as close as possible to C.Sc(f−Δf), is determined, where S c ( f ) - 1 - exp ( - 2 j π Nf / F e ) 1 - exp ( - 2 j π f / F e ) , and C is a complex coefficient.
A method of synchronising a communication receiver, comprising the steps of evaluating a deviation between a modulation frequency, combined with a first baseband signal to form a signal transmitted on a propagation channel and a frequency used by the receiver to form a second baseband signal from a signal received on the propagation channel, and adjusting the frequency used by the receiver according to the evaluated deviation,
A synchronisation device for a communication receiver, comprising means for evaluating a deviation between a modulation frequency, combined with a first baseband signal to form a signal transmitted on a propagation channel and a frequency used by the receiver to form a second baseband signal from a signal received on the propagation channel, and means for adjusting the frequency used by the receiver according to the evaluated deviation,
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