Branch metric generator for Viterbi decoder

Details Branch metric generator for Viterbi decoder Branch metric generator for Viterbi decoder

2006-09-26

2006-09-26

Dildine, R. Stephen (Department: 2133)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C714S792000, C714S794000

Reexamination Certificate

active

07114122

ABSTRACT:
The present invention discloses an apparatus used to generate a branch metric for a Viterbi decoder. The apparatus includes a linear feedback shift register and a convolutional encoder. The linear feedback shift register performs a calculation based on a specific primitive characteristic polynomial and creates a binary number sequence after the calculation. The convolutional encoder generates the branch metric by encoding the binary number sequence. Besides, the apparatus is further capable of selecting one of the several built-in primitive characteristic polynomials by inputting a selection signal in order to conform to the request of the different systems.

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Abramovici, M., et al.; Digital Systems Testing and Testable Design; IEEE Press, Piscataway, New Jersey, 1994, pp. 432-439.

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