Frame formatting for high rate optical communications
First Claim
1. A method comprising:
- receiving a plurality of optical signals on a plurality of optical channels from an optical fiber communication system;
digitizing the received plurality of optical signals to obtain a plurality of data streams corresponding to the plurality of optical signals;
identifying unique words in each of the plurality of data streams;
determining one or more characteristics of the plurality of data streams based at least in part on the unique words, wherein the one or more characteristics includes at least one of particular received optical channels corresponding to the plurality of data streams or a timing offset between one or more of the plurality of data streams; and
demodulating and decoding the plurality of data streams into data transport frames using the one or more characteristics of the plurality of data streams determined using the identified unique words.
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Accused Products
Abstract
Methods, systems, and devices are described for formatting of data streams to be transmitted over fiber optic channels, and for processing received optical signals. A data transmission device may include a digital coding and modulation module that encodes a digital data stream, inserts unique words into the digital data stream, and modulates the encoded data stream and unique words onto optical channels for transmission over an optical fiber. A demodulation and decoding device may include a unique word identification module that identifies the unique words inserted in each optical channel stream, determines one or more characteristics of the plurality of optical channels based on the unique words, and provides the one or more characteristics to one or more other modules in the demodulator and decoding device.
26 Citations
20 Claims
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1. A method comprising:
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receiving a plurality of optical signals on a plurality of optical channels from an optical fiber communication system; digitizing the received plurality of optical signals to obtain a plurality of data streams corresponding to the plurality of optical signals; identifying unique words in each of the plurality of data streams; determining one or more characteristics of the plurality of data streams based at least in part on the unique words, wherein the one or more characteristics includes at least one of particular received optical channels corresponding to the plurality of data streams or a timing offset between one or more of the plurality of data streams; and demodulating and decoding the plurality of data streams into data transport frames using the one or more characteristics of the plurality of data streams determined using the identified unique words. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A digital demodulation and decoding apparatus comprising:
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a receiver optical interface module configured to; receive a plurality of optical signals on a plurality of optical channels from an optical fiber communication system; and digitize the received plurality of optical signals to obtain a plurality of data streams corresponding to the plurality of optical signals; a unique word identification module coupled with the receiver optical interface module configured to; identify unique words in each of the plurality of data streams; and determine one or more characteristics of the plurality of data streams based at least in part on the unique words, wherein the one or more characteristics includes at least one of particular received optical channels corresponding to the plurality of data streams or a timing offset between one or more of the plurality of data streams; and a demodulator module coupled with the unique word identification module and configured to demodulate and decode the plurality of data streams into data transport frames using the one or more characteristics of the plurality of data streams determined using the identified unique words. - View Dependent Claims (17, 18, 19)
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20. A system comprising:
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a digital coding and modulation apparatus, comprising; a data transport layer framer module configured to; receive an incoming data stream; and format the data stream into first data transport frames; a coding module coupled with the data transport layer framer module and configured to encode error correction information into the first data transport frames; a unique word insertion module coupled with the coding module and configured to insert a plurality of first unique words into a data stream including the first data transport frames, each of the plurality of first unique words corresponding to a different optical communication channel; and an optical transmission module coupled with the unique word insertion module and configured to modulate the first data transport frames and the plurality of first unique words onto a plurality of optical communications channels and transmit the plurality of optical communications channels over an optical fiber, each of the plurality of first unique words being modulated onto an associated optical communications channel; and a digital demodulation and decoding apparatus comprising; a receiver optical interface module configured to receive a plurality of optical signals on a plurality of optical channels from an optical fiber communication system and digitize the received plurality of optical signals to obtain a plurality of data streams corresponding to the plurality of optical signals; a unique word identification module coupled with the receiver optical interface module configured to identify second unique words in each of the plurality of data streams and determine one or more characteristics of the plurality of data streams based at least in part on the second unique words, wherein the one or more characteristics includes at least one particular received optical channels corresponding to the plurality of data streams or a timing offset between one or more of the plurality of data streams; and a demodulator module coupled with the unique word identification module and configured to demodulate and decode the plurality of data streams into second data transport frames using the one or more characteristics of the plurality of data streams determined using the identified unique words.
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Specification