Signal processing in an optical receiver
AssigneeXieon Networks S.a.r.l.
InventorsStefano Calabro, Bernhard Spinnler
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Abstract
The present invention relates to signal processing in an optical receiver, in particular to equalization performed in coherent optical receivers. A multiple-input multiple-output (MIMO) equalizer receives and equalizes a plurality of real value signals, for example four sampled electrical baseband tributaries (HI, HQ, VI, VQ). The outputs of the multiple-input multiple-output (MIMO) equalizer provide equalized real or imaginary components of complex signals. The complex signals including the real and imaginary components are then each and individually equalized to remove chromatic dispersion.
Claims15
A signal processing device, comprising:
- a multiple-input multiple-output equalizer configured to receive and equalize a plurality of real value signals corresponding to signals or signal components received by an optical a coherent receiver, wherein outputs of the multiple-input multiple-output equalizer provide equalized real or imaginary components of complex signals;
- and
- a plurality of chromatic dispersion equalizers, wherein each chromatic dispersion equalizer is configured to receive and equalize one of said complex signals provided by the multiple-input multiple-output equalizer.
A signal processing method, comprising:
- receiving and equalizing a plurality of real value signals corresponding to signals or signal components received by an optical a coherent receiver, wherein the real value signals are received and equalized using a multiple-input multiple-output equalizer such as to provide equalized real or imaginary components of complex signals at the outputs of the multiple-input multiple-output equalizer;
- and individually equalizing each of said complex signals to compensate chromatic dispersion.
Dependencies are inferred from the claim text.