Improvement of turbo decoding using cross-entropy

In this paper, we present a simple method for normalizing the output information produced by a turbo decoder. The method is devised based on the cross-entropy (CE) concept. Simulations comparing the new method with some widely used normalization techniques show that the proposed approach can achieve about 0.2∼0.3 dB coding gain improvement on average while reducing up to about 1/2∼2/3 iteration for decoding, but require much fewer and simpler computations.