System and Method Including Modified Bit-Interleaved Coded Modulation
First Claim
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1. A system comprising:
- a plurality of first forward error correction (FEC) code encoders, each of said first FEC code encoders being configured to encode an associated input signal using a first FEC code and provide an associated first FEC code encoded output;
an interleaver coupled to at least one of said plurality of first FEC code encoders and configured to provide an interleaved output comprising at least a portion of said associated first FEC code encoded output of said at least one of said plurality of first FEC code encoders;
a second FEC code encoder coupled to said interleaver and configured to encode said interleaved output with a second FEC code and provide a second FEC code encoded output; and
a modulator coupled to said second FEC code encoder and configured to modulate an optical signal in response to said second FEC code encoded output to provide a modulated output signal.
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Abstract
A system and method with a modified bit-interleaved coded modulation with iterative decoding (BICM-ID). Coded and interleaved bits are combined and coded with a second FEC code that is then mapped to a modulation format. The second FEC code may be a single parity check (SPC) and the scheme may be referred to as a SPC-BICM-ID scheme.
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Citations
20 Claims
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1. A system comprising:
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a plurality of first forward error correction (FEC) code encoders, each of said first FEC code encoders being configured to encode an associated input signal using a first FEC code and provide an associated first FEC code encoded output; an interleaver coupled to at least one of said plurality of first FEC code encoders and configured to provide an interleaved output comprising at least a portion of said associated first FEC code encoded output of said at least one of said plurality of first FEC code encoders; a second FEC code encoder coupled to said interleaver and configured to encode said interleaved output with a second FEC code and provide a second FEC code encoded output; and a modulator coupled to said second FEC code encoder and configured to modulate an optical signal in response to said second FEC code encoded output to provide a modulated output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An optical signal receiver comprising:
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a second forward error correction (FEC) decoder configured to receive an interleaved signal encoded with first and second FEC codes and decode said signal using said second FEC code to provide a second FEC code decoded output signal; a de-interleaver coupled to said second FEC decoder and configured to provide a plurality of de-interleaved outputs in response to said second FEC code decoded output signal; and a plurality of first FEC code decoders, each of said first FEC code decoders being configured to receive an associated one of said de-interleaved outputs and provide an associated first FEC code decoded output signal. - View Dependent Claims (12, 13, 14)
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15. A method comprising:
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encoding each of a plurality of data streams using a first forward error correction (FEC) code to provide a plurality of first FEC code encoded data streams; interleaving said first FEC code encoded data streams to provide at least one interleaved output; encoding said interleaved output using a second FEC code to provide a second FEC code encoded data stream; and modulating an optical signal to provide a modulated output signal representative of said second FEC code encoded data stream. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification