With the goal of reducing the number of operations required for digital backward-propagation used for fiber impairment compensation, wavelets-based filtering in digital backward-propagation is presented. The wavelets-based design relies on signal decomposition using time-limited functions and hence is more compatible with the dispersion operator, which is also time-limited. This is in comparison with inverse-Fourier filter design which by definition is not time-limited due to the use of harmonic functions for signal decomposition. Artificial, after-the-fact windowing may be employed in this case; however only a limited amount of saving in number of operations is achieved, compared to the wavelets-base filter design. Wavelets-based filter design procedure and numerical simulations which validate this approach are presented in this paper.
US 8,326,159 B2
Application Serial Number
Assignee at Issuance
College of Optics and Photonics
Assignee at Filing
Nonprovisional Application Record
Li, Guifang and Goldfarb, Gilad, "Electronic Compensation of Impairments Using Wavelet Filters for Backward Propagation" (2012). UCF Patents. 147.