Frame formatting for high rate optical communications
First Claim
1. 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 data transport frames;
a coding module coupled with the data transport layer framer module and configured to encode error correction information into the data transport frames;
a unique word insertion module coupled with the coding module and configured to insert a plurality of unique words into a data stream including the data transport frames, each of the plurality of 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 data transport frames and 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 unique words being modulated onto an associated optical communications channel.
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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.
20 Citations
25 Claims
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1. A digital coding and modulation apparatus, comprising:
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a data transport layer framer module configured to; receive an incoming data stream; and format the data stream into data transport frames; a coding module coupled with the data transport layer framer module and configured to encode error correction information into the data transport frames; a unique word insertion module coupled with the coding module and configured to insert a plurality of unique words into a data stream including the data transport frames, each of the plurality of 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 data transport frames and 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 unique words being modulated onto an associated optical communications channel. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A digital decoding and demodulation apparatus, comprising:
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an optical interface module configured to receive a plurality of optical signals on a plurality of optical channels from an optical fiber and output a digitized version of each optical signal; a unique word identification module coupled with the optical interface module and configured to identify a unique word in each of the plurality of optical signals; and a demodulator module coupled with the unique word module and configured to; receive the digitized version of the optical signals; and demodulate the optical signals into data transport frames using characteristics of the optical signals determined using the identified unique words, the one or more characteristics comprising an identification of one or more of the plurality of data streams and timing information between one or more of the plurality of data streams. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A method comprising:
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receiving an incoming encoded bit stream that is to be transmitted over a plurality of optical channels in an optical fiber communication system; differentially encoding the encoded bit stream; inserting a unique word into the bit stream for each optical channel onto which the encoded bit stream is to be transmitted, each optical channel corresponding to a different unique word; and transmitting the encoded bit stream and unique words over the plurality of optical channels. - View Dependent Claims (17, 18, 19)
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20. A method comprising:
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receiving a digitized version of a plurality of optical signals received from an optical fiber communication system, the digitized version of the plurality of optical signals including a plurality of data streams corresponding to the plurality of optical signals; identifying a unique word in each of the data streams; determining one or more characteristics of the data streams based on the identification of the unique words, the one or more characteristics comprising an identification of one or more of the plurality of data streams and timing information between one or more of the plurality of data streams; and demodulating the data streams into data transport frames using characteristics of the optical signals determined using the identified unique words. - View Dependent Claims (21, 22, 23, 24)
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25. A method comprising:
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receiving an incoming encoded bit stream that is to be transmitted over a plurality of optical channels in an optical fiber communication system; inserting a unique word into the bit stream for each optical channel onto which the encoded bit stream is to be transmitted, each optical channel corresponding to a different unique word; and transmitting the encoded bit stream and unique words over the plurality of optical channels, wherein transmitting the encoded bit stream comprises transmitting dual-polarity QPSK optical signals over an optical fiber.
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Specification