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Relationships of the average probability of decoding bit error as a function of the signal-to-noise ratio

Adaptive selection of parameters of S-random interleaver in wireless data transmission systems with turbo coding

Sergey V. Zaitsev, Volodymyr V. Kazymyr, V. M. Vasilenko, A. V. Yarilovets

Abstract


The paper proposes an adaptive method for selecting the parameters of S-random interleaver of turbo-code codex in wireless data transmission systems under conditions of a priori uncertainty for enhancing the reliability of data transmission and reducing the computational complexity of the coding/decoding process of turbo codes. This method is based on the adaptive selection of parameters of S-random interleaver depending on values of the normalized quantity of sign reversals of a posteriori-a priori log-likelihood function ratios (LLFR) regarding the transmitted data bits of turbo-code decoder. The results of simulation modeling show that the rational parameters of S separation of data bit interleaving for S-random interleaver are obtained depending on the values of signal-to-noise ratio in channel and the normalized number of sign reversals of a posteriori-a priori LLFR of interactive turbo-code decoder. As a result, the energy gain of coding can be obtained, the complexity of its hardware and software implementation can be reduced, and reliability of data transmission can be enhanced as compared to the known results, for example, the fourth generation mobile communication system 4G LTE-Advanced.

Keywords


turbo code; uncertainty; simulation

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References


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DOI: https://doi.org/10.3103/S0735272718010028

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