A simple implementation of turbo decoder

Details A simple implementation of turbo decoder A simple implementation of turbo decoder

H - Electricity

04

L

H04L 1/22 (2006.01) H03M 13/00 (2006.01) H03M 13/23 (2006.01) H03M 13/41 (2006.01) H03M 13/45 (2006.01)

Patent

CA 2338919

A method and apparatus for decoding convolutional codes used in error- correcting circuitry for digital data communication. To increase the speed and precision of the decoding process, the branch and/or state metrics are normalized during the soft decision calculations, whereby the dynamic range of the decoder is better utilized. Another aspect of the invention relates to decreasing the time and memory required to calculate the log-likelihood ratio by sending some of the soft decision values directly to a calculator without first storing them in memory.

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