Performance research and simulations on improvement adaptive iterative decoder algorithms of Turbo codes

Turbo codes were proposed in 1993 and lots of work was done on this aspect .But decoding algorithms for Turbo codes were complex, and had large iteration delay. Several adaptive iterative decoding algorithms for Turbo codes were proposed to reduce decoding delay. In this paper, we investigate and improve these adaptive algorithms. According to the improvement adaptive iterative decoder algorithm, the average number for turbo decoding was decreased, while the BER performance obtained was not degraded.