Non linear scaling of reliability values in a turbo decoder...

Details Non linear scaling of reliability values in a turbo decoder... Non linear scaling of reliability values in a turbo decoder...

2007-02-27

2007-02-27

Torres, Joseph D. (Department: 2133)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C714S795000, C714S755000

Reexamination Certificate

active

10277567

ABSTRACT:
A decoder system for concatenated codes such as turbo codes, comprises at least two component decoders mutually coupled through a reliability value handler for handling reliability values. The reliability value handler comprises a scaling unit for providing non linearly scaled reliability values. This reduces the reliability values provided by the component decoders, such that the non linearly scaled reliability values better reflect the genuine reliability information or Log Likelihood Ratio (LLR) in a practical realization of the decoder system generally having sub optimal component decoders.

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J. Vogt et al; “Reducing Bit Width of Extrinsic Memory in Turbo Decoder Realisations”, Electronics Letters, IEE Stevenage, GB, vol. 36, No. 20, Sep. 28, 2000, pp. 1714-1716, XP006015740.

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