摘要
针对卷积码的盲识别问题,总结了现有识别方法的实现原理及过程,并用Matlab进行了仿真分析。对于码长、码率及编码记忆长度等参数,利用接收码字构造矩阵并进行变换,从而达到识别的目的。针对生成多项式的识别,给出了四种常用的方法,并比较了各方法的性能和计算复杂度。结果表明,在低误码率低于10-2情况下,采用欧几里德算法最佳;当误码率为10-2量级时,基于Walsh-Hadamard变换的方法更能保证识别的准确性。
For the problem of blind recognition for convoluntional code,the existing methods are summarized.Firstly,for the recognition of coding parameters,such as code length,code rate and memory length,a method based on matrix transformation is given.Then,four methods are introduced for generator polynomials recognition.The comparison between these methods shows that the Euclidean algorithm works better at low BER,while the method based Walsh-Hadamard transform has a good performance when BER is as high as 10-2.
出处
《航天电子对抗》
2014年第4期26-29,共4页
Aerospace Electronic Warfare
