Modulated optical signals are received in a coherent optical receiver employing both post
digital filter and inter-symbol interference (ISI) equalizer such as a maximum likelihood …

BACKGROUND 0.003 Very long optical fiber transmission paths, such as those employed in
underSea or transcontinental terrestrial lightwave transmission Systems, which employ …

An optical receiver demodulates optical orthogonal frequency division multiplexed signals
and generates a number of subcarrier reference signals, each for demodulating a frequency …

(57) ABSTRACT A signal equalizer for compensating impairments of an optical signal
received through a link of a high speed optical communications network. At least one set of …

In a representative embodiment, a disclosed receiver of an optical multicarrier offset-
quadrature-amplitude-modulated (MC-OQAM) signal is configured to track and compensate …

BACKGROUND 0004 Optical communications (eg, transmitted via opti cal fibers or other
media) has become a common way to transmit digital signals. For example, the use of single …

In one embodiment, a coherent optical receiver has a digital signal processor that processes
one or more digital I/O-signal pairs to recover data carried by a modulated optical signal in a …

(57) ABSTRACT A signal equalizer for compensating impairments of an opti cal signal
received through a link of a high speed optical communications network. At least one set of …

Methods and systems of data symbol recovery in a coherent optical receiver of an optical
communications system. A respective probabilistic phase error is calculated for each of a …

A method of optical communication, implemented at a receiver in an optical communication
network, includes receiving an optical signal carrying modulated information bits, processing …