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2010•Digital Signal ProcessingRequires access

Development and Implementation of Soft Output Viterbi Algorithm (SOVA)

H.K.S. Randhawa, Priti Bansal, Yaduvir Singh

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Abstract

The Viterbi algorithm is a dynamic programming algorithm for finding the most likely sequence of hidden states called the Viterbi path that results in a sequence of observed events, especially in the context of Markov models. In this research paper, SOVA has been implemented. The soft output Viterbi algorithm (SOVA) is a variant of the classical Viterbi algorithm. SOVA differs from the classical Viterbi algorithm in that it uses a modified path metric which takes into account the a priori probabilities of the input symbols, and produces a soft output indicating the reliability of the decision. Simulation results give the performance of this algorithm.

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What this paper is about

The Viterbi algorithm is a dynamic programming algorithm for finding the most likely sequence of hidden states called the Viterbi path that results in a sequence of observed events, especially in the context of Markov models. In this research paper, SOVA has been implemented. The soft output Viterbi algorithm (SOVA) is a variant of the classical Viterbi algorithm. SOVA differs from the classical Viterbi algorithm in that it uses a modified path metric which takes into account the a priori probabilities of the input symbols, and produces a soft output indicating the reliability of the decision. Simulation results give the performance of this algorithm.

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Available abstract

The Viterbi algorithm is a dynamic programming algorithm for finding the most likely sequence of hidden states called the Viterbi path that results in a sequence of observed events, especially in the context of Markov models. In this research paper, SOVA has been implemented. The soft output Viterbi algorithm (SOVA) is a variant of the classical Viterbi algorithm. SOVA differs from the classical Viterbi algorithm in that it uses a modified path metric which takes into account the a priori probabilities of the input symbols, and produces a soft output indicating the reliability of the decision. Simulation results give the performance of this algorithm.

Key concepts: Viterbi algorithm, Soft output Viterbi algorithm, Iterative Viterbi decoding, Computer science, Forward algorithm, Algorithm, Viterbi decoder, Path (computing)

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