Phase estimation for coherent optical detection

Details Phase estimation for coherent optical detection Phase estimation for coherent optical detection

2011-06-14

2011-06-14

Tran, Dzung D (Department: 2613)

Optical communications

Receiver

C398S205000, C398S207000

Reexamination Certificate

active

07962048

ABSTRACT:
The present invention is a method and apparatus to make an estimate of the phase of a signal relative to the local oscillator in an optical coherent detection subsystem that employs a digital signal processor having a parallel architecture. The phase estimation method comprises operations that do not use feedback of recent results. The method includes a cycle count function so that the phase estimate leads to few cycle slips. The phase estimate of the present invention is approximately the same as the optimal phase estimate.

REFERENCES:
patent: 2003/0016422 (2003-01-01), Wijntjes
patent: 2003/0103212 (2003-06-01), Westphal et al.
patent: 2004/0218932 (2004-11-01), Epworth et al.

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