1.安徽大学互联网学院,安徽合肥 230031
2.重庆机场集团有限公司重庆机场扩建指挥部,重庆 401120
3.重庆邮电大学通信与信息工程学院,重庆 400065
[ "强幸子 男,1986年出生于陕西乾县,讲师.主要研究方向:卫星导航信号处理.E-mail: qiangxingzi@163.com" ]
[ "金 翔 男,1984年出生于湖北孝感,高级工程师.主要研究方向:图像处理,视频分析.E-mail: 117628432@qq.com" ]
[ "张天骐 男,1971年出生于四川眉山,教授.研究方向:扩频信号的盲处理、神经网络实现以及信号的同步处理.E-mail: zhangtq@cqupt.edu.cn" ]
收稿:2021-02-08,
修回:2021-05-17,
纸质出版:2022-08-25
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强幸子,金翔,张天骐.基于相似度的NPLC-DSSS信号扩频码盲估计[J].电子学报,2022,50(08):2043-2048.
QIANG Xing-zi,JIN Xiang,ZHANG Tian-qi.Blind Estimation for Spread Spectrum Code of NPLC-DSSS Signal Based on Similarity[J].ACTA ELECTRONICA SINICA,2022,50(08):2043-2048.
强幸子,金翔,张天骐.基于相似度的NPLC-DSSS信号扩频码盲估计[J].电子学报,2022,50(08):2043-2048. DOI: 10.12263/DZXB.20210234.
QIANG Xing-zi,JIN Xiang,ZHANG Tian-qi.Blind Estimation for Spread Spectrum Code of NPLC-DSSS Signal Based on Similarity[J].ACTA ELECTRONICA SINICA,2022,50(08):2043-2048. DOI: 10.12263/DZXB.20210234.
针对非周期长码直接序列扩频(Non-Periodic Long Code Direct Sequence Spread Spectrum,NPLC-DSSS)信号扩频码盲估计的问题,在已知扩频周期,信息码码元宽度以及码速率的条件下,本文提出了一种基于相似度的伪码序列盲估计方法.该方法通过构造信息码库,利用平均相似度对信息码进行同步,再利用特征值分解对扩频码序列进行估计.仿真实验表明,该算法较现有算法不仅抗噪声性能提高了1 dB,而且能够对信息码同步位置及伪码序列进行联合盲估计.
With focus on blind estimation of the pseudo-noise(PN) sequence of a non-periodic long code direct sequence spread spectrum(NPLC-DSSS) signal
a blind estimation approach of PN sequence and synchronous position of information code is proposed based on mean similarity. In this method
the information code library is constructed
the average similarity is used to synchronize the information codes
and eigenvalue decomposition is used to estimate the PN sequence. Simulation results show that compared with the existing algorithms under the same condition
the proposed algorithm not only improves estimation performance by 1 dB
but also can estimate synchronous position of information code and PN sequence jointly.
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