US Patent Application 20090193320 - APPARATUS, AND ASSOCIATED METHOD, FOR DECODING CONVOLUTIONALLY ENCODED DATA
InventorAssigneeUS Classes714/786, Forward error correction by tree code (e.g., convolutional)375/341, Maximum likelihood decoder or viterbi decoder455/66.1, Having diverse art device455/41.2, Short range RF communication455/404.1Emergency or alarm communicationAttorney, Agent or FirmInternational ClassesH03M 13/23H04L 27/06 H04B 7/00 G06F 11/10 H04M 11/04 Abstract textAn apparatus, and an associated method, for correcting errors in decoded data, decoded by a convolutional decoder, such as an SOVA (Soft Output Viterbi Algorithm). A CRC check is performed upon the decoded data. If the CRC check fails, a conclusion is made that the decoded data contains errors. Portions of the decoded data indicated to exhibit low levels of reliability are toggled with values of most-likely error events. A corrected sequence of the decoded data is formed that corrects for the errors in the decoded data. |
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