Invention Grant
- Patent Title: Low complexity decoding algorithm for tail-biting convolutional codes
- Patent Title (中): 用于尾部卷积码的低复杂度解码算法
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Application No.: US13368190Application Date: 2012-02-07
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Publication No.: US08397148B2Publication Date: 2013-03-12
- 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
- Agency: Hogan Lovells US LLP
- Priority: CN200610084044 20060331
- Main IPC: H03M13/03
- IPC: H03M13/03

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
- US20120137198A1 LOW COMPLEXITY DECODING ALGORITHM FOR TAIL-BITING CONVOLUTIONAL CODES Public/Granted day:2012-05-31
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