Patent Number: 8,792,789

Title: Optimized chromatic dispersion filter

Abstract: A method is provided for performing chromatic dispersion (CD) compensation. A zero-forcing filter is calculated with a number of taps (n) required to nullify a chromatic dispersion frequency response of an optical channel. The number of taps in the zero-forcing filter is truncated to a number equal to (n-x), where x is an integer greater than 0. In one aspect, the chromatic dispersion frequency response of the optical channel is partitioned into a plurality of constituent chromatic dispersion responses, and a zero-forcing filter is calculated for each of the plurality of constituent chromatic dispersion responses. The number of taps in each of the plurality of zero-forcing filters is truncated, and the CD compensation filter is formed for each of the plurality of truncated tap zero-forcing filters. In another aspect, the tap values of the zero-forcing filter are quantized to a finite quantization set.

Inventors: Varadarajan; Badri (Mountain View, CA), Dabiri; Daruish (San Jose, CA), Roy; Subhash (Lexington, MA)

Assignee: Applied Micro Circuits Corporation

International Classification: H04B 10/00 (20130101)

Expiration Date: 7/29/12018