Adaptive Selection of Turbo Code Parameters in Wireless Data Transmission Systems

The article proposes a method for multilevel parametric adaptation of the turbo code codec in wireless data transmission systems. The choice of the actual parameters of the turbo code depends on the values of the normalized number of changes of the sign in the posterior-a priori the log likelihood ratio (LLR) for transmitted data bits of the turbo decoder. The results of simulation showed that the application of the method of multilevel parametric adaptation of the turbo code codec reduces the number of errors by 2–3.3 times, and also makes it possible to increase the reliability of information transmission in comparison with the known results, for example, the fourth generation 4G LTE-Advanced mobile communication.