【摘要】 迭代译码可以提高Turbo码的译码性能,但也增加了译码时延。为了降低Turbo译码时延,提出了一种联合自适应优化方案,首先在保证系统总体性能要求的情况下,利用外部自适应迭代准则确定迭代次数,然后在此基础上进一步采用内部迭代停止准则,该联合自适应迭代方案的平均迭代次数比单独的外部和内部迭代方案都小,误帧率性能与外部自适应迭代相当。更多还原

【Abstract】 Iterative decoding can provide an excellent performance for Turbo codes,but it also brings on decoding delay.To reduce it,we propose a joint adaptive optimization scheme.We use external adaptive iterative criteria to determine the number of iterations.The stopping criteria is further used in the internal iterative.The average iteration number of the joint adaptive scheme is smaller than the single external or internal iteration scheme,while the frame error rate performance is similar to the external adaptive iterative scheme.更多还原