Title:
実信号系列の復号方法およびデバイス、信頼性検出ユニットおよびビタビ復号ユニット
Document Type and Number:
Japanese Patent JP2004512775
Kind Code:
A
Abstract:
A method and device for decoding a sequence of physical signals. A Viterbi algorithm is carried out a first time for all physical signals, resulting in a maximum likelihood path, wherein there is one signal value for each physical signal and which has been determined along the entire trellis according to the Viterbi algorithm. A reliability value is determined for each signal value of the maximum likelihood path. The Viterbi algorithm is then carried out a second time with the following steps: selecting one subregion of the trellis, the subregion having a partial initial signal value and a partial end signal value on the maximum likelihood path; determining one further path in that subregion of the trellis which ends at the partial end signal value of the maximum likelihood path; determining each signal value on the further path and comparing same with the corresponding signal value on the maximum likelihood path relating to the same time; depending on the comparison result, the signal value of the maximum likelihood path is allocated the reliability value determined in the previous iteration step or the minimum of this and the reliability value of the partial end signal value; shifting the subregion of the trellis by at least one time unit; and using, storing and/or outputting the determined signal values and selected reliability values associated with the signal values as the decoded sequence.
Inventors:
Becker, Burghard
Detsch, Marx
Jung, Peter
Kera, Tideya
Prehinger, Jork
Lucito, Alfredo
Schmidt, Peter
Schneider, Michael
Detsch, Marx
Jung, Peter
Kera, Tideya
Prehinger, Jork
Lucito, Alfredo
Schmidt, Peter
Schneider, Michael
Application Number:
JP2002538663A
Publication Date:
April 22, 2004
Filing Date:
October 24, 2001
Export Citation:
Assignee:
Infineon Technolgies SC300 GmbH & Co.KG
International Classes:
G06F11/10; H03M13/41; H03M13/45; (IPC1-7): H03M13/41; G06F11/10
Attorney, Agent or Firm:
Hidesaku Yamamoto
Takaaki Yasumura
Natsuki Morishita
Takaaki Yasumura
Natsuki Morishita