Title:
DECODING METHOD AND APPARATUS BASED ON SOFT OUTPUT VITERBI DECODING ALGORITHM SOVA
Document Type and Number:
WIPO Patent Application WO/2018/064924
Kind Code:
A1
Abstract:
A decoding method and apparatus based on a soft output Viterbi decoding algorithm SOVA, the method comprising: using a Viterbi algorithm to determine a maximum likelihood path corresponding to a receiving sequence in a preset grid diagram, and calculating a metric difference between a competition path of each state node on the maximum likelihood path and the maximum likelihood path, the grid diagram being used for representing state changes of an encoder at different times (S21); on the basis of the metric difference value, selecting K state nodes from amongst the state nodes on the maximum likelihood path to be sampling points, K being a positive integer (S22); performing backtracking processing using the sampling points as backtracking nodes, in order to update the logarithmic likelihood rate LLR value of each information bit comprised in the receiving sequence (S23). Decoding complexity can be reduced and decoding speed increased whilst ensuring system performance, facilitating implementation in hardware.
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Inventors:
PEI RUILIN (CN)
HUANG QIN (CN)
WANG JIAQING (CN)
SUN SHAOHUI (CN)
HUANG QIN (CN)
WANG JIAQING (CN)
SUN SHAOHUI (CN)
Application Number:
PCT/CN2017/100530
Publication Date:
April 12, 2018
Filing Date:
September 05, 2017
Export Citation:
Assignee:
CHINA ACADEMY TELECOMMUNICATIONS TECHNOLOGY (CN)
International Classes:
H03M13/41
Foreign References:
| CN103685105A | 2014-03-26 | |||
| CN101345601A | 2009-01-14 | |||
| CN1665145A | 2005-09-07 | |||
| US20130086446A1 | 2013-04-04 |
Attorney, Agent or Firm:
TDIP & PARTNERS (CN)
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