Systems and methods for LDPC coded modulation
First Claim
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1. A method of combined modulation and Forward Error Correction (FEC) coding of data bit signals for transmission over a communications channel comprising:
- FEC coding a subset of the data bit signals using an LDPC code to produce FEC coded bit signals;
modulating the data bit signals and the FEC coded bit signals using at least one constellation that contains more than one bit signal; and
designating a coset of the at least one constellation using the FEC coded bit signals.
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Abstract
Typical forward error correction methods employ Trellis Code Modulation. By substituting low density parity check coding in place of the convolution code as part of a combined modulation and encoding procedure, low density parity check coding and modulation can be performed. The low density parity check codes have no error floor, no cycles, an equal bit error rate for the information bits and the parity bits, and timely construction of both a parity check matrix with variable codeword size and a generator matrix is possible.
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Citations
36 Claims
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1. A method of combined modulation and Forward Error Correction (FEC) coding of data bit signals for transmission over a communications channel comprising:
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FEC coding a subset of the data bit signals using an LDPC code to produce FEC coded bit signals;
modulating the data bit signals and the FEC coded bit signals using at least one constellation that contains more than one bit signal; and
designating a coset of the at least one constellation using the FEC coded bit signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 20, 21, 22, 23, 24, 26, 27, 28, 29, 30)
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13. A method of forward error correction coding of data bit signals using LDPC codes comprising:
- determining at least one of a data rate and a latency; and
determining a LDPC generator matrix that encodes data bit signals.
- determining at least one of a data rate and a latency; and
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19. A method of forward error correction decoding of data bit signals using LDPC codes comprising:
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determining at least one of a data rate and a latency; and
determining a LDPC parity check matrix that decodes coded bit signals.
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25. An information storage media comprising information that performs forward error correction coding of data bit signals using LDPC codes comprising:
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information that determines at least one of a data rate and a latency; and
information that determines a LDPC generator matrix that encodes data bit signals.
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31. An information storage media comprising information that performs forward error correction decoding of data bit signals using LDPC codes comprising:
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information that determines at least one of a data rate and a latency; and
information that determines a LDPC parity check matrix that decodes the coded bit signals. - View Dependent Claims (32, 33, 34, 35, 36)
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Specification