Improvement in SOVA based normalization scheme for turbo codes

Normalizing the soft output of SOVA is commonly used to improve the performance of SOVA. Normalization based on the fixed sealing factor is a simple and effective strategy. In this paper, we investigate the applicability of the fixed scaling factor to the BR-SOVA (SOVA proposed by Battail). In the proposed scheme, the soft output of BR-SOVA is normalized by the fixed scaling factor. The performance of proposed techniques is studied through simulation. The simulation results indicate that the proposed scheme results in improvement in performance.