Telefonaktiebolaget Lm Ericsson (publ)

Domenico Marsella

Roberto Magri

Enrico Forestieri

Marco Secondini

A method () of non-linear propagation impairment equalization, the method comprising the steps of: a. receiving () communications traffic carried by an optical communications signal transmitted over an optical communications link; b. generating () a time dependent filter representation of a nonlinear time-variant impulse response of the inverse of the optical communications link; and c. applying () the time dependent filter representation to the received communications traffic to form non-linear propagation impairment equalized communications traffic. An optical communications link nonlinear propagation impairment equalizer and optical communications signal receiver apparatus are also provided.

Non-linear propagation impairment equalization

A method of detecting a signal in an optical receiver is described. The method includes converting a received optical signal to a digital electrical signal comprising a plurality of samples, applying a predetermined phase rotation to said samples to obtain amplitude and phase components of phase range adjusted sample values, and performing a first detection process based on the amplitude and phase components of the phase range adjusted sample values.

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Pisa, Italy

Domenico Marsella