Invention Application
- Patent Title: DECODING METHOD FOR TAIL-BITING CONVOLUTIONAL CODES USING A SEARCH DEPTH VITERBI ALGORITHM
- Patent Title (中): 使用搜索深度维特比算法解码转换代码的解码方法
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Application No.: US11687543Application Date: 2007-03-16
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Publication No.: US20070245209A1Publication Date: 2007-10-18
- Inventor: Wuxian SHI , Juan DU , Yiqun GE , Guobin SUN
- Applicant: Wuxian SHI , Juan DU , Yiqun GE , Guobin SUN
- Applicant Address: CN Beijing
- Assignee: STMICROELECTRONICS (BEIJING) R&D COMPANY LTD.
- Current Assignee: STMICROELECTRONICS (BEIJING) R&D COMPANY LTD.
- Current Assignee Address: CN Beijing
- Priority: CN200610084044.2 20060331
- Main IPC: H03M13/00
- IPC: H03M13/00

Abstract:
A method for decoding tail-biting convolutional codes. The method includes initializing a correction depth, selecting a first starting state from a set of encoding states, and initializing a metric value for the selected starting state as zero and the other states as infinity. The input bit stream is read and a Search Depth Viterbi algorithm (SDVA) is performed to determine path metrics and identify a minimum-metric path. The ending state for the minimum-metric path is determined and the output for this ending state is identified as “previous output.” A second starting state is set to the ending state of the minimum-metric path, and symbols equal to the correction depth from the previous output are read. The SDVA is performed on the second set of read symbols to generate a corrected output. A decoded output is generated by replacing symbols at the beginning of the previous output with the corrected output.
Public/Granted literature
- US07856591B2 Decoding method for tail-biting convolutional codes using a search depth viterbi algorithm Public/Granted day:2010-12-21
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