In this paper the performance of product codes based on quadratic residue codes is investigated. Our Proposed
Iterative decoding SISO based on a soft permutation decoding algorithm (SPDA) as a component decoder.
Numerical result for the proposed algorithm over Additive White Gaussian Noise (AWGN) channel is provided.
Results show that the turbo effect of the proposed decoder algorithm is established for this family of quadratic
residue codes.