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US 8,478,131 B2Granted
Optical communication system having enhanced spectral efficiency using electronic signal processing
AssigneeEye Diagram IP, LLC
InventorsM. Imran Hayee, Rami J. Haddad
Life of this patent
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Abstract
An optical communication system combines strong electrical pre-filtering of data at the transmitter and digital feedback equalization (DFE) at the receiver to enhance spectral efficiency. The system can be applied to optical networking and digital communication systems, including binary modulated systems optical network systems.
Claims20
An optical communication system comprising:
- transmitter means for pre-filtering each of a plurality of data channels to limit the bandwidth of each of said plurality of data channels and outputs an optical transmission which includes the pre-filtered data channels;
- and
- receiver means for applying digital equalization to the optical transmission, said digital equalization configured to compensate for the pre-filtering of the data channels at the transmitter.
An optical transmitter comprising:
- means for pre-filtering each of a plurality of data channels;
- means for modulation of the data channels to limit a bandwidth of each of said plurality of data channels and output of an optical transmission, wherein pre-filtering takes place prior to modulation;
- and
- means for applying digital feedback equalization to the optical transmission compensates for the pre-filtering of the data channels and allows bit detection.
1 more element
An optical receiver comprising:
- means for receiving an optical transmission where each of a plurality of data channels prior to the transmission have been pre-filtered to limit a bandwidth of the data channels;
- and
- means for applying digital feedback equalization to the optical transmission to compensate for the pre-filtering of the data channels at the transmitter.
Dependencies are inferred from the claim text.