摘要
通信系统中的交织技术在抗信道衰落引起的突发错误方面发挥着重要作用,能大大提高信息传输的可靠性.其中卷积交织由于能减少时延和存储量,得到了广泛应用.本文在非合作环境中针对信道编码中常用的卷积交织技术,提出了一种对交织参数进行盲估计的方法.所提方法通过构造去交织器,将截取数据流的起始位置信息转换成交织延时偏差,利用伽罗华域中的高斯约当消元法和线性分组码的性质,实现了对卷积交织参数的有效估计.计算机仿真结果表明,即使在比特误码率为0.01时,本文所提算法仍可以达到较好的估计效果.
The technology of interleaving plays an important role in avoiding burst errors by fading channel in communication systems and can greatly improve the reliability of data transmission.The convolutional interleave is widely used because it can reduce delay and save memory space.For the convolutional interleave in the channel coding,a method is proposed to blindly estimate the interleave parameters in the non-cooperative context.It can estimate these parameters effectively by constructing the deinterleaver,converting the initial location of the intercepted data to the delay deviation of interleaving,and then making use of Gaussian-Jordan elimination through pivoting algorithm in Galois Fields and the properties of linear block code.Computer simulation results show that the proposed algorithm can provide good performance even when the bit error rate is 0.01.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2011年第9期2173-2177,共5页
Acta Electronica Sinica
基金
中央高校基本科研业务费专项资金基础研究项目(No.ZYGX2010J027)
关键词
线性分组码
卷积交织
盲估计
linear block code
convolutional interleave
blind estimation
