Error correcting code decoder
Patent 4493080 Issued on January 8, 1985. Estimated Expiration Date: 
September 23, 2002. Estimated 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.
September 23, 2002. Estimated 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.Patent References 3432754 3883729 Surface acoustic wave unique word detector and coherent demodulator Code correlator loop using arithmetic synthesizer Interleaved binary coded signal translation device Concatenated error correcting system Synchronization of a data communication receiver with a received signal Signal synchronization system Patent #: 4414676 InventorAssigneeApplicationNo. 06/422465 filed on 09/23/1982US Classes:714/755, Double encoding codes (e.g., product, concatenated)375/365, Synchronization word708/314Matched filter typeExaminersPrimary: Atkinson, Charles E.Attorney, Agent or FirmInternational ClassesH03M 13/00 (20060101)H03M 13/05 (20060101) Foreign Application Priority Data1980-12-08 CAAbstractA method and apparatus which can significantly reduce the matched filter requirements in decoding cyclic block codes, and is particularly advantageous for decoding maximal length block codes, and other cyclic block codes in which the number of codewords is ࣘ2k where k is the number of data bits encoded into each codeword. The signal containing the codeword is concatenated with itself, then the concatenated signal is applied to a matched filter to provide a peaking signal at some point in time as the concatenated signal is passed through the matched filter. The position of the peaking signal relative to a predetermined instant of time is sensed whereby the identity of the codeword (and thus data) can be determined.Other References
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