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2004•Journal of Electron DevicesRequires access

A Simplified SOVA Algorithm

Qiu Yu-lin

Open publisher page 1 citations

Abstract

A simplified SOVA has been proposed. Comparing to the Viterbi algorithm(VA), soft output viterbi algorithm(SOVA) outputs not only the decoded information bits but also the log-likelihood of the information bits. The SOVA has to compute the weight and update the weight of the information bit. This improved the complexity. The proposed algorithm simplified the update method of the SOVA. It reduces the complexity distinctly comparing to the conventional algorithm. The proposed algorithm does not affect the performance of the SOVA. However, when the proposed algorithm is applied at TURBO decoder. It will degrade the performance or the TURBO. The simulation result shows that the performance only degrades about 0.4 dB.

About this research paper

What this paper is about

A simplified SOVA has been proposed. Comparing to the Viterbi algorithm(VA), soft output viterbi algorithm(SOVA) outputs not only the decoded information bits but also the log-likelihood of the information bits. The SOVA has to compute the weight and update the weight of the information bit. This improved the complexity. The proposed algorithm simplified the update method of the SOVA. It reduces the complexity distinctly comparing to the conventional algorithm. The proposed algorithm does not affect the performance of the SOVA. However, when the proposed algorithm is applied at TURBO decoder. It will degrade the performance or the TURBO. The simulation result shows that the performance only degrades about 0.4 dB.

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OpenAlex reports 1 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

A simplified SOVA has been proposed. Comparing to the Viterbi algorithm(VA), soft output viterbi algorithm(SOVA) outputs not only the decoded information bits but also the log-likelihood of the information bits. The SOVA has to compute the weight and update the weight of the information bit. This improved the complexity. The proposed algorithm simplified the update method of the SOVA. It reduces the complexity distinctly comparing to the conventional algorithm. The proposed algorithm does not affect the performance of the SOVA. However, when the proposed algorithm is applied at TURBO decoder. It will degrade the performance or the TURBO. The simulation result shows that the performance only degrades about 0.4 dB.

Key concepts: Soft output Viterbi algorithm, Viterbi algorithm, Computer science, Algorithm, Viterbi decoder, Iterative Viterbi decoding, Turbo code, Turbo

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