关键词: 差错控制编码, turbo码, 最大后验概率算法, 高吞吐率

Abstract: Turbo code has shown its outstanding error-correcting performance in many wireless communication systems.However，turbo decoder’s throughput is highly restricted by the recursion calculation of the MAP algorithm.In this paper，a new architecture of MAP decoder is presented.It improves the recursion architecture in the Radix-4 MAP decoder in order to gain higher throughput，meanwhile the modification could reduce the coding gain loss induced by the approximation of the previous Radix-4 algorithm.A new block decode strategy is also adopted to reduce the memory cost in the MAP decoder.Simulation and synthesis result shows the proposed architecture could increase the throughput by 21%，while its hardware complexity increase is negligible.

Key words: error-correcting code, turbo code, Max A Posterior（MAP） algorithm, high-throughput