Turbo码译码的动态停止迭代准则的改进

提出了一种改进的动态停止迭代译码准则和方法,即CRC-MOR(cyclic redundancycheck-measurement of reliability)迭代停止准则,解决了在Turbc码译码时进行多次迭代,造成较大的译码延时。对所提出的CRC-MOR迭代停止判决准则进行的仿真,以及仿真结果与CRC和MOR译码迭代停止判决方法相比较,验证了所提出的改进迭代停止准则在译码性能没有降低的情况下,可以明显地降低平均迭代次数,减小译码延时。

Improvement of stopping criterion of dynamic iterative decoding for turbo code

Turbo code becomes increasingly important in the field of communication coding due its excellent noise resistance.Turbo code needs many decoding iterations,however,which results in long decoding time delay.In order to resolve this problem,we present an improved dynamic iterative stopping criterion,the cyclic redundancy check-measurement of reliability(CRC-MOR) stopping criterion,which could reduce the number of decoding iterations.Computer simulation of the improved criterion and comparing the results with those of CRC and MOR methods show the average number of iterations decreased and the bit error rate(BER) performance obtained was not degraded.