2005Telecommunication EngineeringRequires access

Optimized Architectural Design of Viterbi Decoder

Huanzhang Lu

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Abstract

When Viterbi algorithm is implemented in FPGA, the occupation of hardware resource and the speed of decoder are two conflictive aspects. And it can be resolved by arranging ACS unit and path metric RAM reasonably. In the case of (2,1,6) code and based on radix-4 algorithm, a new dynamic management of path metric memory is introduced, which can deduce the decoder's complexity effectively and improve the speed of Viterbi decoder relatively.

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What this paper is about

When Viterbi algorithm is implemented in FPGA, the occupation of hardware resource and the speed of decoder are two conflictive aspects. And it can be resolved by arranging ACS unit and path metric RAM reasonably. In the case of (2,1,6) code and based on radix-4 algorithm, a new dynamic management of path metric memory is introduced, which can deduce the decoder's complexity effectively and improve the speed of Viterbi decoder relatively.

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Available abstract

When Viterbi algorithm is implemented in FPGA, the occupation of hardware resource and the speed of decoder are two conflictive aspects. And it can be resolved by arranging ACS unit and path metric RAM reasonably. In the case of (2,1,6) code and based on radix-4 algorithm, a new dynamic management of path metric memory is introduced, which can deduce the decoder's complexity effectively and improve the speed of Viterbi decoder relatively.

Key concepts: Soft-decision decoder, Viterbi decoder, Viterbi algorithm, Computer science, Soft output Viterbi algorithm, Path (computing), Field-programmable gate array, Decoding methods

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