Method and apparatus for decoding a data packet

Details Method and apparatus for decoding a data packet Method and apparatus for decoding a data packet

1996-12-16

1999-11-30

Grant, William

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

714793, 714759, H03M 1300

Patent

active

059961104

ABSTRACT:
A method and apparatus decodes a data packet in a communication system utilizing an error correcting code. Channel symbols are received (302), and channel symbol reliability weights are determined (306) for each. A code word symbol is formed (308) from the channel symbols, and the channel symbol reliability weights are mapped (312) into a code word symbol reliability weight, which is set equal to the minimum channel symbol reliability weight mapped for the code word symbol. The method and apparatus continues (318) to similarly process additional channel symbols until the data packet is completely collected. Then, a predetermined number of code word symbols having the lowest code word symbol reliability weights in the data packet are marked (320) as erasures, after which the data packet is decoded (322) by utilizing a soft decision decoding technique.

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patent: 5721754 (1998-02-01), Chen
patent: 5742620 (1998-04-01), Iwamura
Richard E. Blahut, Theory and Practice of Error Control Codes, pp. 191-197 & 464-472, 1983, USA.

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