Chiesa Shahinian & Giantomasi PC
Feed-forward carrier phase recovery for optical communications
The carrier phase of a carrier wave modulated with information symbols is recovered with a multi-stage, feed-forward carrier phase recovery method. A coarse phase recovery is performed to determine a first phase angle which provides a first best estimate of the information symbol corresponding to the digital signal. Using the first best estimate as input, a second stage of estimation is then performed to determine a second phase angle which provides an improved (second) best estimate of the information symbol. Additional stages of estimation can be performed.
AT&T Intellectual Property I, L.P.
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Xiang
Zhou