[1]王晓燕,方世良,朱志峰.一种基于自相关估计的水声直扩信号检测方法[J].东南大学学报(自然科学版),2010,40(2):248-252.[doi:10.3969/j.issn.1001-0505.2010.02.006]
　Wang Xiaoyan,Fang Shiliang,Zhu Zhifeng.Detection method of acoustic direct-sequence spread-spectrum signal based on autocorrelation estimation[J].Journal of Southeast University (Natural Science Edition),2010,40(2):248-252.[doi:10.3969/j.issn.1001-0505.2010.02.006]
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一种基于自相关估计的水声直扩信号检测方法()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
40
期数:
2010年第2期
页码:
248-252
栏目:
信息与通信工程
出版日期:
2010-03-20

文章信息/Info

Title:
Detection method of acoustic direct-sequence spread-spectrum signal based on autocorrelation estimation
作者:
王晓燕;  方世良;  朱志峰
东南大学水声信号处理教育部重点实验室,南京 210096
Author(s):
Wang Xiaoyan;  Fang Shiliang;  Zhu Zhifeng
Key Laboratory of Underwater Acoustic Signal Processing of Ministry of Education, Southeast University, Nanjing 210096, China
关键词:
非合作;  自相关估计;  直接序列扩频信号
Keywords:
non-cooperative;  autocorrelation estimation;  direct sequence spread spectrum signal
分类号:
TN911.23;TB566
DOI:
10.3969/j.issn.1001-0505.2010.02.006
摘要:
利用直接序列扩频信号的自相关特性,提出了一种直扩信号相关峰累积检测方法.理论上分析了直扩信号的自相关特性,可知在伪码周期整数倍处可能会出现峰值,利用这些相关峰及其倍数关系可以对直扩信号进行判别.但由于信元信号与噪声的影响,这一系列相关峰并非连续稳定出现.在低载噪比时,一些自相关峰淹没在噪声中,直接对其检测比较困难.利用相关峰出现的周期关系,设计了相关峰累积检测器.该检测器不仅可以实现自动检验,而且可适用于低载噪比情况,具有实际应用价值.计算机仿真结果和海试数据都验证了该方法的可行性与实用性.
Abstract:
A detection method of correlation peak cumulant is proposed based on the characteristics of direct sequence spread spectrum(DSSS)signal autocorrelation. Spectrum peaks may be obtained at the integral periods of pseudo code due to the characteristics of DSSS signal autocorrelation. These correlation peaks and their multiple relationships can be used to recognize DSSS signals. However the correlation peaks cannot be achieved steadily due to the affection of source signals and noise. With low carrier to noise ratio, some peaks are covered by the noise level and difficult to be detected. The detector of correlation peak cumulant is designed by utilizing the periodic relationships of correlation peaks. This detector, which is capable of automatic implement and suitable for low carrier to noise ratios, has practical application values. Computer simulation results and ocean test data verify the practicability and feasibility of the detection method.

参考文献/References:

[1] Hill D A,Bodie J B.Carrier detection of PSK signals[J].IEEE Trans on Commun, 2001,49(3):487-496.
[2] 董占奇,胡捍英,于宏毅.基于延迟相乘-相关及谱分析的直扩信号检测与符号周期、码片时宽估计分析[J].电子与信息学报,2008,30(4):840-842.
　 Dong Zhanqi,Hu Hanying,Yu Hongyi.The detection,symbol period and chip width estimation of DSSS signals based on delay-multiply,correlation and spectrum analysis[J].Journal of Electronics and Information Technology, 2008,30(4):840-842.(in Chinese)
[3] 张天骐,李雪松,代少升,等.一种同时估计直扩信号伪码周期及码片速率的方法[J].舰船电子对抗,2008,31(3):77-83,98.
　 Zhang Tianqi,Li Xuesong,Dai Shaosheng,et al.An approach to estimate the pseudo-code period and chip rate of direct sequence spread spectrum signals simultaneously [J].Shipboard Electronic Countermeasure, 2008,31(3):77-83,98.(in Chinese)
[4] Kuehls J F,Geraniotis E.Presence detection of binary-phase-shift-keyed and direct-sequence apread-spectrum signals using a prefilter-delay-and-multiply device[J].IEEE J Sel Areas Com, 1990,8(5):915-933.
[5] 张天骐,周正中.直扩信号伪码周期的谱检测[J].电波科学学报,2001,16(4):518-521,528.
　 Zhang Tianqi,Zhou Zhengzhong.A new spectral method of periodic detection of PC sequence in lower SNR DS/SS signals[J].Chinese Journal of Radio Science,2001,16(4):518-521,528.(in Chinese)
[6] Gardner W A,Spooner C M.Signal interception:performance advances of cyclic-feature detectors[J].IEEE Trans on Commun, 1992,40(1):149-159.
[7] Gardner W A,Spooner C M.Detection and source location of weak cyclostationary signals:simplifications of the maximum-likelihood receiver [J].IEEE Trans on Commun, 1993,41(6):905-916.
[8] Jin Yan,Ji Hongbing.A cyclic-cumulant based method for DS-SS signal detection and parameter estimation[C] //2005 IEEE International Symposium on Microwave,Antenna,Propagation and EMC Technologies for Wireless Communications. Beijing,China,2005:966-969.
[9] 赵知劲,邬佳,徐春云,等.基于四阶累积量的DSSS/QPSK信号检测方法研究[J].电子学报,2007,35(6):1046-1049.
　 Zhao Zhijin,Wu Jia,Xu Chunyun,et al.The study on the detection methods of DSSS/QPSK signal based on the fourth-order cumulants[J].Acta Electronic Sinica, 2007,35(6):1046-1049.(in Chinese)
[10] EI-Khamy S E,Lotfy M A,Badawy A S.Efficient detection of truncated m-sequence using high-order statistics[C] //Proceedings of the Twentieth National Radio Science Conference. Cairo,Egypt,2003:C8-1-9.
[11] 樊昌信,曹丽娜.通信原理[M].6版.北京:国防工业出版社,2006:388-389.
[12] 王永德,王军.随机信号分析基础[M].2版.北京:电子工业出版社,2006:62-63.

备注/Memo

备注/Memo:
作者简介: 王晓燕(1978—),女,博士生; 方世良(联系人),男,博士,教授,博士生导师,slfang@seu.edu.cn.
引文格式: 王晓燕,方世良,朱志峰.一种基于自相关估计的水声直扩信号检测方法[J].东南大学学报:自然科学版,2010,40(2):248-252. [doi:10.3969/j.issn.1001-0505.2010.02.006]
更新日期/Last Update: 2010-03-20