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US Patent 6115436 - Non-binary viterbi decoder using butterfly operations
US Patent Issued on September 5, 2000
Estimated Patent Expiration Date:
December 31, 2017Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Estimated Patent Expiration Date:
December 31, 2017Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.AbstractA decoder for decoding a data signal using a non-binary trellis diagram by designating binary butterfly trellises within the non-binary trellis is disclosed. The decoder analyzes each designated binary butterfly trellis using the basic Viterbi binary butterfly operation to generate a pair of pathways to each node of the non-binary trellis. The pathways for each node from the basic binary butterfly operations are compared to determine the survivor path for that node.Other References
| InventorsApplicationNo. 002563 filed on 12/31/1997US Classes:375/341, Maximum likelihood decoder or viterbi decoder714/795, Viterbi decoding714/796Branch metric calculationField of Search375/265, Trellis encoder or Trellis decoder375/341, Maximum likelihood decoder or viterbi decoder714/794, Maximum likelihood714/795, Viterbi decoding714/796Branch metric calculationExaminersPrimary: Le, Amanda T.Attorney, Agent or FirmUS Patent References5068859, Large constraint length high speed viterbi decoder based on a modular hierarchial decomposition of the deBruijn graphIssued on: 11/26/1991 Inventor: Collins, et al.5539757, Error correction systems with modified Viterbi decoding Issued on: 07/23/1996 Inventor: Cox, et al.5588028, Simplified trellis decoder Issued on: 12/24/1996 Inventor: Parizhsky5703911Decoding method for trellis codes with large free distances Issued on: 12/30/1997 Inventor: Lin, et al. Foreign Patent References
International ClassH04L 001/00 |
