Pulse or digital communications – Synchronizers – Frequency or phase control using synchronizing signal
Reexamination Certificate
2004-09-01
2008-08-05
Payne, David C. (Department: 2611)
Pulse or digital communications
Synchronizers
Frequency or phase control using synchronizing signal
Reexamination Certificate
active
07409024
ABSTRACT:
A process for providing a phase synchronization of a pilot aided carrier of an input digital signal z(k), the signal z(k) having signal fields of Lssymbol signals, namely a block of LPpilot symbol signals ZP(k)and a data field of (Ls−LP) data symbol signals Zd(k), and characterized for each signal field (l) by:extracting the pilot symbol signals ZP(k)andcalculating an unwrapped phase estimate {circumflex over (θ)}(lLs) over the pilot block of said signal field (1) and:interpolating said unwrapped phase estimates of successive signal fields (l, +1 . . . ) with a Wiener interpolator having M taps to obtain interpolated phase estimates having a Minimum Mean Square Error;providing linear interpolation between said interpolated phase estimates to obtain phase correction estimates ({circumflex over (θ)}(ks)) over the data field of said signal fields;calculating from said phase correction estimates ({circumflex over (θ)}(ks)) a phase correction (e−j{circumflex over (θ)}(ks)) to be applied to said signal Z(k).
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Bigi Alan
De Gaudenzi Riccardo
Fittipaldi Domenico
Ginesi Alberto
Agence Spatiale Europeenne
Clark & Brody
Nguyen Leon-Viet Q
Payne David C.
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