Noise-tolerant optical modulation
AssigneeCiena Corporation
InventorsMahmoud Taherzadehboroujeni, Shahab Oveis Gharan, Kim B. Roberts
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Abstract
A method of transmitting data. The method comprises preliminarily providing a modulation scheme comprising an N-symbol constellation defined in an M-dimensional space, wherein N<2M, and a composite distance between a given pair of symbols within the constellation increases with increasing Hamming distance between data words encoded in each of those symbols. During run-time, a data signal to be transmitted is encoded as symbols of the constellation, and modulated onto at least M dimensions of a carrier light in accordance with the symbols.
Claims23
A method of transmitting data, the method comprising:
- an encoder encoding a data signal to be transmitted as symbols of an N-symbol constellation defined in an M-dimensional space, wherein N<2M, and a composite distance between a given pair of symbols within the constellation increases with increasing Hamming distance between data words encoded in each of those symbols;
- and
- a modulator modulating at least M dimensions of a carrier light in accordance with the symbols.
A transmitter for transmitting data in an optical communications system, the transmitter comprising:
- an encoder configured to encode a data signal to be transmitted as symbols of an N-symbol constellation defined in an M-dimensional space, wherein N<2M, and a composite distance between a given pair of symbols within the constellation increases with increasing Hamming distance between data words encoded in each of those symbols;
- and
- a modulator configured to modulate the symbols onto at least M dimensions of a carrier light.
Dependencies are inferred from the claim text.