摘要：In this paper, the error exponent of a polar code generator matrix for data rate enhancement between two users is investigated. A new expression for optimal correlation coefficient between the error probability of the main and eavesdropper channel in Wyner’s wiretap channel model introduced. By using this optimal correlation coefficient, a relationship between code length and the error exponent is defined. Moreover, to investigate the performance of the proposed formulation, an optimization based on Arikan and Korda’s theory on the maximum value of the error exponent was conducted. It is shown that the new correlation coefficients significantly increase the decoding error probability in the wiretapper side for both of the theories. In addition, the Bhattacharyya parameter was also defined for the wiretap channel. Finally, by applying the optimized values to a binary erasure channel, the error probability for each scenario is calculated.
