System and method for reviving catastrophic codes
AssigneeLucent Technologies Inc.
InventorDawei Huang
Life of this patent
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Abstract
A system and method of the present invention revives a catastrophic code used for channel coding data. A data receiving circuit receives a digital input data sequence to be coded with a code having a distance spectrum containing an infinite component that corresponds to a finite hamming weight such that the code may cause catastrophic error propagation. The circuit is operative for periodically inserting known symbols into the digital input data sequence. An encoder, such as a convolutional encoder, is operatively connected to the data receiving circuit and encodes the digital input data sequence.
Claims23
A system for reviving a code used for channel coding data in data communications systems comprising:
- a data receiving circuit for receiving a digital input data sequence to be coded with a code having a distance spectrum containing an infinite component that corresponds to a finite hamming weight such that the code may cause catastrophic error propagation, said circuit being operative for periodically inserting known symbols into the digital input data sequence;
- and
- an encoder operatively connected to said data receiving circuit for encoding the digital input data sequence with the code.
A method of reviving a code used for channel coding data in a data communications systems comprising the steps of:
- receiving a digital input data sequence to be coded with a code having a distance spectrum containing an infinite component that corresponds to a finite hamming weight such that the code may cause catastrophic error propagation;
- periodically inserting known symbols into the digital input data sequence;
- and
- encoding the digital input data sequence with the code.
A method of reviving a code used for channel coding data in a data communications systems comprising the steps of:
- receiving a digital input data sequence to be coded with a code having a distance spectrum containing an infinite component that corresponds to a finite hamming weight such that the code may cause catastrophic error propagation;
- periodically inserting known symbols into the digital input data sequence;
- and
- trellis encoding the digital input data sequence after inserting the known symbols to produce a channel coded data stream such that the number of connections between trellis nodes in a trellis are reduced.
Dependencies are inferred from the claim text.