Apparatus and method for stopping iterative decoding in a...

Details Apparatus and method for stopping iterative decoding in a... Apparatus and method for stopping iterative decoding in a...

2005-05-03

2005-05-03

Tran, Khai (Department: 2637)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C375S262000, C714S794000

Reexamination Certificate

active

06888901

ABSTRACT:
Disclosed is an apparatus for stopping iterative decoding in a turbo decoder performing iterative decoding on a received frame comprised of information bits and then outputting the iteratively decoded results. A turbo decoder sequentially outputs absolute LLR (Log Likelihood Ratio) values associated with the respective information bits of the received frame by the iterative decoding, and stops the iterative decoding in response to a stop command for the iterative decoding. A minimum LLR detector selects a minimum value M(i) among the sequentially output absolute LLR values. A controller issues a command to stop the iterative decoding, if the minimum value M(i) is larger than a first threshold determined based on a minimum value Fminamong absolute LLR values output through previous iterative decoding.

REFERENCES:
patent: 6745352 (2004-06-01), Cheng
patent: 6829313 (2004-12-01), Xu
patent: 20020013922 (2002-01-01), Gueguen
patent: 20020061079 (2002-05-01), Bass
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patent: 1 128 589 (2001-08-01), None
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Japanese Office Action dated Jul. 1, 2003 issued in a counterpart application, namely Appln. No. 2002-553314.
European Search Report dated Jul. 15, 2003 issued in Application No. 01130922.6.
Zhai et al., “New Error Detection Techniques and Stopping Criteria for Turbo Decoding”, Canadian Conference on Electrical and Computer Engineering Proceedings, vol. 1, Mar. 7-10, 2000, pp. 58-62.

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