循环谱相关理论用于直扩信号检测与参数估计的研究
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摘要
直扩通信技术具有很强的抗干扰能力、低截获率、良好的码分多址通信能力和高保密性等优点,因此它在军事和民用通信、遥测、定位等领域得到了广泛的应用。
由于直扩信号具有上述优点,在复杂噪声中对其进行检测和参数估计是一个非常困难的课题。本文提出了应用循环谱相关技术来检测和识别直扩信号的方法。研究了直扩信号的检测和参数估计两方面内容。循环谱相关技术的分析对象是具有循环平稳性的信号,而直扩信号是利用伪随机码调制的宽带信号,具有循环平稳性。所以可以利用循环谱相关技术从复杂噪声中检测直扩信号。
在本课题中对以上方案的可行性作了深入的理论分析,提出了循环谱相关理论的两种实现算法,然后利用计算机仿真软件对该算法作了仿真研究,最后设计完成了基于DSP的硬件平台。在仿真中对直扩信号的载频和伪码速率参数进行了估计,结果和理论一致。在硬件平台上也对这两个参数的估计进行了实验,实际结果与仿真结果一致,证明该方案是可行的,与其他方法相比较,具有一定的优势。
本课题的研究,验证了循环谱技术的有效性,从而为直扩信号的检测提供了一种有效、实用的方法。
The Spread Spectrum technology has been used widely in fields such as military and civil communications, remote sensing and orientation because of its strong anti-interference, LPI, good multi-access ability and excellent secrecy.Thus it is very difficult to detect DS/SS and estimate its parameters because of its features we mentioned above. This paper presents a method that makes use of cyclic spectrum correlation technology to detect DS/SS and estimate its parameters. Cyclic spectrum correlation technology is used to analyze the cyclostationary signal. However, DS/SS has cyclic-feature, so we can use cyclic spectrum correlation technology to detect DS/SS and estimate its parameters.This paper detailedly discussed the theory of cyclic spectrum correlation technology and simulates the theory through MATLAB. In the end, the paper gives a hardware platform based on DSP to accomplish the arithmetic. Both the simulation and the experiments proved the feasibility and superiority of cyclic spectrum correlation technology.All studies in this paper proved that cyclic spectrum correlation technology is a effective and applied method for DS/SS signal detection.
由于直扩信号具有上述优点,在复杂噪声中对其进行检测和参数估计是一个非常困难的课题。本文提出了应用循环谱相关技术来检测和识别直扩信号的方法。研究了直扩信号的检测和参数估计两方面内容。循环谱相关技术的分析对象是具有循环平稳性的信号,而直扩信号是利用伪随机码调制的宽带信号,具有循环平稳性。所以可以利用循环谱相关技术从复杂噪声中检测直扩信号。
在本课题中对以上方案的可行性作了深入的理论分析,提出了循环谱相关理论的两种实现算法,然后利用计算机仿真软件对该算法作了仿真研究,最后设计完成了基于DSP的硬件平台。在仿真中对直扩信号的载频和伪码速率参数进行了估计,结果和理论一致。在硬件平台上也对这两个参数的估计进行了实验,实际结果与仿真结果一致,证明该方案是可行的,与其他方法相比较,具有一定的优势。
本课题的研究,验证了循环谱技术的有效性,从而为直扩信号的检测提供了一种有效、实用的方法。
The Spread Spectrum technology has been used widely in fields such as military and civil communications, remote sensing and orientation because of its strong anti-interference, LPI, good multi-access ability and excellent secrecy.Thus it is very difficult to detect DS/SS and estimate its parameters because of its features we mentioned above. This paper presents a method that makes use of cyclic spectrum correlation technology to detect DS/SS and estimate its parameters. Cyclic spectrum correlation technology is used to analyze the cyclostationary signal. However, DS/SS has cyclic-feature, so we can use cyclic spectrum correlation technology to detect DS/SS and estimate its parameters.This paper detailedly discussed the theory of cyclic spectrum correlation technology and simulates the theory through MATLAB. In the end, the paper gives a hardware platform based on DSP to accomplish the arithmetic. Both the simulation and the experiments proved the feasibility and superiority of cyclic spectrum correlation technology.All studies in this paper proved that cyclic spectrum correlation technology is a effective and applied method for DS/SS signal detection.
引文
[1] 贾世楼.信息论理论基础.哈尔滨工业大学出版社,2001:96-99页
[2] 张贤达,保铮.非平稳信号分析与处理.国防工业出版社,1998:324-332页
[3] 查光明,熊贤祚.扩频通信.西安电子科技大学出版社,1997
[4] 胡广书.数字信号处理-理论、算法与实现.清华大学出版社,1997
[5] 樊昌信.通信原理(第5版).国防工业出版社,2001
[6] William A. GARDNER. Spectral Correlation of Modulated Signals: Part Ⅰ—Analog Modulation. IEEE Trans. Commun. 1987, COM-35(6): P 584-594
[7] G. K. Yeung W. A. Gardner Search-Efficient Methods of Detection of Cyclostationary Signals [J]. in IEEE trans. S. P., 1996, 44(5)
[8] Willian A. Gardner, Measurement of Spectral Correlation, IEEE Tans. Acoustics, Speech, Signal Processing, vol. ASSP-34, pp. 1111-1123, Oct. 1986
[9] 黄春琳.基于循环平稳特性的低截获概率信号的截获技术研究.国防科大工学博士论文,2001.10
[10] AD9852—CMOS, 300MHz Complete DDS Synthesizer. Technical Data Sheet. Analog Device Inc., 2000
[11] 张厥盛,曹丽娜.锁相与频率合成技术.成都:电子科技大学出版社,1995.6
[12] 杨小牛,楼才义,徐建良.软件无线电原理与应用.北京:电子工业出版社,2001.1
[13] 宋万杰,王留成.AD9852在多模式高性能信号源中的应用.电子元器件应用.2003.4
[14] Gardner W. A. Signal interception: a unifying theoretical framework for feature detection, in IEEE trans. Com. 1988 36 (8)
[15] William A. GARDNER, William A. BROWN, Chin-kang CHEN. Spectral Correlation of Modulated Signals: Part Ⅱ-Digital Modulation. IEEE Trans. Commun.. 1987, COM-35(6): P595-601
[16] 黄春琳.基于循环谱包络的扩谱直序信号的码片时宽、载频、幅度估计.电子学报.2002,第九期,9-11页
[17] 黄春琳.低截获概率雷达信号的循环谱相关函数检测方法分析.国防科技大学学报.2001,第4期
[18] 韩国栋,邬江兴.调制参数提取的谱相关方法.航天电子对抗.2001,第3期
[19] 余敬东,郭伟.直接序列扩频通信的循环谱检测和参数估计技术.电子科技大学学报.1996,第25卷
[20] 赵旦峰,赵春晖.循环谱理论在MSK扩频信号检测与识别中的应用.哈尔滨工程大学学报.2001
[21] 陈四根,杨莘元.QPSK信号谱相关性质研究.哈尔滨工程大学学报.2003
[22] William A. Gardner, Chd M. Spooner. Cyclic Spectral Analysis for Signal Detection and Modulation Recognition. IEEE 1988 CH2537-9/88/.. P419-424
[23] D. Vucic, M. Obradovic. Spectral correlation evaluation of MSK and offset QPSK modulation. Signal Processing 78 (1999), P363—367
[24] 郑君里,杨为里.信号与系统.高等教育出版社,1990
[25] 朱华.随机信号分析.北京理工大学出版社,1990
[26] 苏金明,阮沈勇.MATLAB6.1实用指南.电子工业出版社.北京.2002
[27] 梁虹,梁洁,陈跃斌.信号与系统分析及MATLAB实现.电子工业出版社.北京.2002
[28] 施阳,李俊.MATLAB语言工具箱.西北工业大学出版社,1998
[29] 李刚.数字信号微处理器的原理及其开发应用.天津大学出版社.天津.2000
[30] 戴明桢.周建江.TMS320VC54×DSP结构、原理及应用.北京航空航天大学出版社.北京.2001
[31] 申敏.DSP原理及其在移动通信中的应用.人民邮电出版社.北京.2001
[32] TMS320VC5402 FIXED-POINT DIGITAL SIGNAL PROCESSOR. Texas Instruments Incorporated. 2000
[33] TPS767D301,TPS767D318..Dual-output Low-dropout Voltage Regulators. Texas Instruments Incorporated. 2002
[34] AD8138-Low Distortion Differential ADC Driver. Analog Devices Inc., 2003
[35] AD9214-10-Bit,65/80/105 MSPS 3V A/D Converter. Analog Devices Inc., 2002
[36] SN74V215,SN74V225,SN74V235,...DSP-SYNC FIRST-IN FIRST-OUT MEMORIES. Texas Instruments Incorporated. 2002
[2] 张贤达,保铮.非平稳信号分析与处理.国防工业出版社,1998:324-332页
[3] 查光明,熊贤祚.扩频通信.西安电子科技大学出版社,1997
[4] 胡广书.数字信号处理-理论、算法与实现.清华大学出版社,1997
[5] 樊昌信.通信原理(第5版).国防工业出版社,2001
[6] William A. GARDNER. Spectral Correlation of Modulated Signals: Part Ⅰ—Analog Modulation. IEEE Trans. Commun. 1987, COM-35(6): P 584-594
[7] G. K. Yeung W. A. Gardner Search-Efficient Methods of Detection of Cyclostationary Signals [J]. in IEEE trans. S. P., 1996, 44(5)
[8] Willian A. Gardner, Measurement of Spectral Correlation, IEEE Tans. Acoustics, Speech, Signal Processing, vol. ASSP-34, pp. 1111-1123, Oct. 1986
[9] 黄春琳.基于循环平稳特性的低截获概率信号的截获技术研究.国防科大工学博士论文,2001.10
[10] AD9852—CMOS, 300MHz Complete DDS Synthesizer. Technical Data Sheet. Analog Device Inc., 2000
[11] 张厥盛,曹丽娜.锁相与频率合成技术.成都:电子科技大学出版社,1995.6
[12] 杨小牛,楼才义,徐建良.软件无线电原理与应用.北京:电子工业出版社,2001.1
[13] 宋万杰,王留成.AD9852在多模式高性能信号源中的应用.电子元器件应用.2003.4
[14] Gardner W. A. Signal interception: a unifying theoretical framework for feature detection, in IEEE trans. Com. 1988 36 (8)
[15] William A. GARDNER, William A. BROWN, Chin-kang CHEN. Spectral Correlation of Modulated Signals: Part Ⅱ-Digital Modulation. IEEE Trans. Commun.. 1987, COM-35(6): P595-601
[16] 黄春琳.基于循环谱包络的扩谱直序信号的码片时宽、载频、幅度估计.电子学报.2002,第九期,9-11页
[17] 黄春琳.低截获概率雷达信号的循环谱相关函数检测方法分析.国防科技大学学报.2001,第4期
[18] 韩国栋,邬江兴.调制参数提取的谱相关方法.航天电子对抗.2001,第3期
[19] 余敬东,郭伟.直接序列扩频通信的循环谱检测和参数估计技术.电子科技大学学报.1996,第25卷
[20] 赵旦峰,赵春晖.循环谱理论在MSK扩频信号检测与识别中的应用.哈尔滨工程大学学报.2001
[21] 陈四根,杨莘元.QPSK信号谱相关性质研究.哈尔滨工程大学学报.2003
[22] William A. Gardner, Chd M. Spooner. Cyclic Spectral Analysis for Signal Detection and Modulation Recognition. IEEE 1988 CH2537-9/88/.. P419-424
[23] D. Vucic, M. Obradovic. Spectral correlation evaluation of MSK and offset QPSK modulation. Signal Processing 78 (1999), P363—367
[24] 郑君里,杨为里.信号与系统.高等教育出版社,1990
[25] 朱华.随机信号分析.北京理工大学出版社,1990
[26] 苏金明,阮沈勇.MATLAB6.1实用指南.电子工业出版社.北京.2002
[27] 梁虹,梁洁,陈跃斌.信号与系统分析及MATLAB实现.电子工业出版社.北京.2002
[28] 施阳,李俊.MATLAB语言工具箱.西北工业大学出版社,1998
[29] 李刚.数字信号微处理器的原理及其开发应用.天津大学出版社.天津.2000
[30] 戴明桢.周建江.TMS320VC54×DSP结构、原理及应用.北京航空航天大学出版社.北京.2001
[31] 申敏.DSP原理及其在移动通信中的应用.人民邮电出版社.北京.2001
[32] TMS320VC5402 FIXED-POINT DIGITAL SIGNAL PROCESSOR. Texas Instruments Incorporated. 2000
[33] TPS767D301,TPS767D318..Dual-output Low-dropout Voltage Regulators. Texas Instruments Incorporated. 2002
[34] AD8138-Low Distortion Differential ADC Driver. Analog Devices Inc., 2003
[35] AD9214-10-Bit,65/80/105 MSPS 3V A/D Converter. Analog Devices Inc., 2002
[36] SN74V215,SN74V225,SN74V235,...DSP-SYNC FIRST-IN FIRST-OUT MEMORIES. Texas Instruments Incorporated. 2002