电子学报 ›› 2022, Vol. 50 ›› Issue (8): 2043-2048.DOI: 10.12263/DZXB.20210234

• 科研通信 • 上一篇    下一篇

基于相似度的NPLC-DSSS信号扩频码盲估计

强幸子1, 金翔2, 张天骐3   

  1. 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
  • 收稿日期:2021-02-08 修回日期:2021-05-17 出版日期:2022-08-25
    • 作者简介:
    • 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
    • 基金资助:
    • 国家重点研发计划 (2017YFB0503400); 国家自然科学基金 (U2033215); 信号与信息处理重庆市市级重点实验室建设项目 (CSTC2009CA2003)

Blind Estimation for Spread Spectrum Code of NPLC-DSSS Signal Based on Similarity

QIANG Xing-zi1, JIN Xiang2, ZHANG Tian-qi3   

  1. 1.School of Internet,Anhui University,Hefei,Anhui 230031,China
    2.Chongqing Airport Expansion Headquarters,Chongqing Airport Group Co. Ltd. ,Chongqing 401120,China
    3.School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications (CQUPT),Chongqing 400065,China
  • Received:2021-02-08 Revised:2021-05-17 Online:2022-08-25 Published:2022-09-08

摘要:

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.

关键词: 非周期长码直扩信号, 扩频码, 信息码盲同步, 平均相似度, 特征分解

Abstract:

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.

Key words: non-periodic long code direct sequence spread spectrum signals, spreading code, blind synchronization of information sequence, mean similarity, eigen-analysis technique

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