Abstract:

An decoding structure of Turbo code based on parallel prediction control (PPC-Turbo) is presented. The value of № (n+1) exterior information is predicted by prediction control algorithm (PCA). Compared to the traditional decoding algorithm, the PPC-Turbo structure based on PCA could reduce the complexity and delay of the decoding algorithm. The trend of the exterior information prediction is compared by the single predi
ction 6～9thand the compound prediction 6+8th,7+9th exterior information values in sequence. It is verified the delay reduction by the compa
rison of decoding delay under different frame length. The bit error rate performance curve is also compared between PPC-Turbo and traditional Turbo structure. The simulation results show that the process of the component decoder could be used instead.

Key words: Turbo code, iterative decoding structure, parallel prediction control, exterior information