SOVA解码的有效中止判据

Study on efficient stopping criterion of decoding for SOVA

Turbo解码的迭代解码的循环次数越多,误码性能就越能得到改善。但是SOVA解码的循环次数有一个限度,超过这一限度,改善程度有限,只会增加计算量和解码迟滞。为了减少不必要的计算量和解码迟滞,需要更有效率的迭代解码中止判据。提出为了SOVA(Soft output Viterbi algorithm)解码的高效率的迭代解码中止判据,通过模拟,比较、分析了其性能。

The more numbers of iteration of iterative decoding of Turbo decoding, the more improvement of errors decoding performance. But there is a limitation on the number of iteration of SOVA decoding. Beyond this limitation,the improvement extent can be limitted, and calculation amount and the decoding delay can be increased. In order to decrease unnecesary calculation amount and decoding delay, more efficient stopping criterion of iterative decoding are required. Son an efficient stopping criterion for SOVA decoding is proposed,whose performance is compared and analyzed through simulation.