摘要
在通信系统中,为了保证传输信息的可靠性,通常会采用信道编码技术,而线性分组码凭借其具有编、译码结构简单及非常优越的纠错性能,已在各种现代数字通信系统中得到广泛应用,因此,在信息截获领域中对线性分组码盲识别问题也日益突出。为解决较高误码条件下的低码率二进制线性分组码的盲识别问题,提出了基于比特频率检测估计码长的方法,然后,通过优化传统的矩阵化简方法及采用线性分组码的校验关系设定一个判决门限T的方式完成生成矩阵的正确求解,进而实现对低码率的线性分组码的盲识别。理论分析及仿真验证表明:该方法能够实现对低码率线性分组码正确的识别,且具有较好的容错性能,本文最后也验证了该识别方法在较高误码率条件下具有较好的识别效果。
To guarantee the reliability of the information transmission,channel coding technology is commonly used in the communication system.Due to the simple structure of the encoding/decoding and brilliant performance of the er-ror-correcting,the linear block codes is being widely used in the area of modern digital communications.Blind recognition of linear block codes is also becoming more and more important in the information interception field.In order to solve the problem of blind recognition in low code-rate binary linear block codes at high BER,this paper proposes a method of es-timating code length based on bit frequency detection.Furthermore,by forming and solving the traditional simplification of matrices with an optimum way,using the checkout properties of the linear block codes and setting a decision threshold T,a generator matrix is achieved and the blind recognition of low code-rate binary linear block codes is realized.Both theoretical analysis and simulation experiment show the correctable results of this recognition method and have better error-tolerance.Consequently,under the case of high BER,this paper also proved that this recognition method hold the good performance.
出处
《电子测量与仪器学报》
CSCD
2011年第7期642-647,共6页
Journal of Electronic Measurement and Instrumentation
关键词
线性分组码
盲识别
比特频率检测
生成矩阵
linear block codes
blind recognition
bit frequency detection
generator matrix
