Linear approximation of the max* operation for log-map decoding

Details Linear approximation of the max* operation for log-map decoding Linear approximation of the max* operation for log-map decoding

2004-12-03

2009-12-15

Lamarre, Guy J (Department: 2112)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C708S277000

Reexamination Certificate

active

07634703

ABSTRACT:
A decoder for a wireless communication device comprising a calculator for calculating the modulo of a linear approximation of a MAX* function; and a selector for selecting a MAX* output value from the group a(n)mod F, b(n)mod F, and the calculated modulo based upon a determination as to whether a predetermined threshold value for |a(n)−b(n)| has been met, where a(n) is a first state metric, b(n) is a second state metric, C is the predetermined threshold value and F is a value greater than |a(n)−b(n)|.

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Wu et al “Internal Data Width in SISO Decoding Module with Modular Renormalization” IEEE 51st Vehicular Technology Conference, Tokyo, Japan, vol. 1 of 3, Conf 51, May 2000 pp. 675-679.
Cheng et al “Linearly Approximated Log-Map Algorithms for Turbo Decoding” IEEE 51st Vehicular Technology Conference, Tokyo, Japan, vol. 1 of 3, Conf 51, May 2000 pp. 2252-2256.

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