Abstract
Turbo-codes came closest to Shannon’s limit. One of the important steps in the operation of a turbo-code decoder is to calculate the reliability of information symbols. The article describes in detail the process of calculating the reliability of information symbols in accordance with the SOVA algorithm for convolutional code with perforation of code bits and without perforation. For a specific example of a received code sequence containing an error, numerical calculations of the reliability of information symbols for a convolutional code with perforation of code bits and without perforation are performed. The results are compared.
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