Invention Grant
- Patent Title: Chromatic dispersion pre-compensation
- Patent Title (中): 色散预补偿
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Application No.: US13461847Application Date: 2012-05-02
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Publication No.: US08909061B1Publication Date: 2014-12-09
- Inventor: Badri Varadarajan
- Applicant: Badri Varadarajan
- Applicant Address: US CA Sunnyvale
- Assignee: Applied Micro Circuits Corporation
- Current Assignee: Applied Micro Circuits Corporation
- Current Assignee Address: US CA Sunnyvale
- Agency: Amin, Turocy & Watson, LLP
- Main IPC: H04B10/00
- IPC: H04B10/00 ; H04B10/04 ; H04B10/12 ; H04B10/06

Abstract:
A method is provided for performing chromatic dispersion (CD) pre-compensation. The method generates an electronic signal at a transmitter, and uses a transmit CD compensation estimate to compute a CD pre-compensation filter. The transmit CD pre-compensation filter is used to process the electronic signal, generating a pre-compensated electronic signal. The pre-compensated electronic signal is converted into an optical signal and transmitted to an optical receiver via an optical channel. In one aspect, the transmitter generates a test electronic signal and the CD compensation estimate uses a first dispersion value to compute a first CD compensation filter. The transmitter accepts a residual dispersion estimate of the test optical signal from the first optical receiver CD compensation filter, generated from a (receiver-side) CD estimate, and then the transmit CD estimate can be modified in response to the combination of the first dispersion value and residual dispersion estimate.
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