For the problem of blind recognition for pseudo-random interleaver at the error code condition ,a rec-ognition method based on maximum likelihood was proposed .After obtaining the length of interleaver ,we could recognise the commutative relation of interleaver .Compared with the code sequence before and after interleaved , we accounted the value of likelihood ,and found the location of the maximum value .Then we got the commuta-tive relation of interleaver and achieved the recognition of the pseudo-random interleaver .Simulation results showed when the error rate was 0 .05 and the received number of code group was larger than the length of the in-terleaver ,the accuracy of the recognition was above 90% .%针对存在误码时伪随机交织器的识别问题,提出基于最大相似度的伪随机交织器盲识别方法.该方法在得到交织器长度的前提下,对交织器的置换关系进行识别.通过对交织前后的码字序列进行相应的对比,统计出对应码序列的相似度值,找出最大相似度值的位置,从而得出交织置换关系,完成对伪随机交织器的识别.仿真结果表明,本文识别算法在误码率为0.05,接收得到的码组个数大于交织器的长度时,识别准确率可以达到90%以上,具有较好的容错性能.
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