Method of converting an optical communications signal and an optical receiver
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorAntonella Bogoni
Life of this patent
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Abstract
A method of converting an optical communications signal having a differentially encoded multilevel modulation format into communications traffic bits, the multilevel modulation format having a plurality of constellation points, the method comprising: receiving a consecutive pair of symbol signals of said optical communications signal, the pair of symbol signals being arranged to differentially encode a plurality of communications traffic bits; and generating a plurality of optical binary signals in dependence on the symbol signals, each optical binary signal having a respective binary signal level, wherein the optical binary signals form optical versions of the encoded communications traffic bits.
Claims16
A method of converting an optical communications signal having a differentially encoded multilevel modulation format into communications traffic bits, the multilevel modulation format having a plurality of constellation points, the method comprising:
- receiving a consecutive pair of symbol signals of said optical communications signal, the pair of symbol signals being arranged to differentially encode a plurality of communications traffic bits;
- and
- generating a plurality of optical binary signals in dependence on the symbol signals, each optical binary signal having a respective binary signal level, wherein the optical binary signals form optical versions of the encoded communications traffic bits.
An optical receiver comprising:
- an input operative to receive an optical communications signal having a differentially encoded multilevel modulation format having a plurality of constellation points;
- and
- an optical circuit operative to receive a consecutive pair of symbol signals of said optical communications signal, the pair of symbol signals being arranged to differentially encode a plurality of communications traffic bits, and the optical circuit being operative to generate a plurality of optical binary signals in dependence on the symbol signals, each optical binary signal having a respective binary signal level, wherein the optical binary signals form optical versions of the encoded communications traffic bits.
An optical signal regenerator comprising:
- an optical receiver including:
- an input operative to receive an optical communications signal having a differentially encoded multilevel modulation format having a plurality of constellation points;
- and
- an optical circuit operative to receive a consecutive pair of symbol signals of said optical communications signal, the pair of symbol signals arranged to differentially encode a plurality of communications traffic bits, and the optical circuit being operative to generate a plurality-of optical binary signals in dependence on the symbol signals, each optical binary signal having a respective binary signal level, wherein the optical binary signals form optical versions of the encoded communications traffic bits;
- an optical combiner operative to receive said optical binary signals and combine said signals into an output optical signal;
- and
- an optical output operative to output said output optical signal.
Dependencies are inferred from the claim text.