卫星及射电源VLBI观测信号相关处理小波方法研究
|
摘要
VLBI技术以相关处理为关键技术手段。空间观测技术不仅是包含卫星通讯、射电天文和原子钟技术，而且对信号处理和计算机软件技术的发展也十分敏感。该报告结合现代信号处理领域的小波分析方法，对卫星和射电源VLBI观测信号的相关处理进行了小波方法研究。提出小波变换的保角特征概念，为小波在VLBI观测技术中的应用提供理论依据和研究方向。小波分析方法在信号处理领域，被广泛称为“数学显微镜”，但在VLBI观测信号的相关处理领域还未见有资料报道。该报告探索性地开展应用方法研究，将宽带相关处理分解为正交的窄带小波空间内积，利用小波空间的保角变换特征，提取VLBI信号的相关相位特征，将基于FFT的宽带VLBI相关处理技术用优化小波内积分解，实现快速算法。
Correlation processor is a key technical method in VLBI. Technology of interspaces observation not only includes satellite communication, radio astronomy and atomic clock's technique, but also sensitive to the advance of DSP and computer soft. With wavelet method of modern signal process domain ,the report carries out researching into wavelet method of correlation process of VLBI of satellite and radio resource . Bring forward idea of conformal transformation of wavelet analysis, put up reference frame of theory and researching way. The wavelet method has been called after 'math's microscope' in the field of DSP, but not meet with documents in VLBI correlation process. The paper mades research of application method, resolves broadband correlation process into orthogonal inner product of wavelet domain. Making use of characteristic of conformal transformation of wavelet , pick up characteristic of correlation phase. With optimization inner product of wavelet, analyzes broadband correlation process of VLBI of basing on FFT, come true quick speed algorithm.
Correlation processor is a key technical method in VLBI. Technology of interspaces observation not only includes satellite communication, radio astronomy and atomic clock's technique, but also sensitive to the advance of DSP and computer soft. With wavelet method of modern signal process domain ,the report carries out researching into wavelet method of correlation process of VLBI of satellite and radio resource . Bring forward idea of conformal transformation of wavelet analysis, put up reference frame of theory and researching way. The wavelet method has been called after 'math's microscope' in the field of DSP, but not meet with documents in VLBI correlation process. The paper mades research of application method, resolves broadband correlation process into orthogonal inner product of wavelet domain. Making use of characteristic of conformal transformation of wavelet , pick up characteristic of correlation phase. With optimization inner product of wavelet, analyzes broadband correlation process of VLBI of basing on FFT, come true quick speed algorithm.
引文
1 郑为民 中国VLBI网FX型相关处理机关键技术的研究 中国科学院上海天文台博士后研究报告 2001年1月[D] P3
2 李水根 吴纪桃 分形与小波 科学出版社(北京)2002年10月第一版[M]
3 Fujinobu Takahashi, Tetsuro Kondo Very Long Baseline Interferometer Ohmsha IOS Press[M]
4 夏海波 张来斌等 小波分析在管道泄漏信号识别中的应用 石油大学学报 Vol．27 No．2 Sum．136[J] P78～80
5 夏海波 张来斌等 基于GPS时间标签的管道泄漏定位方法 计算机测量与控制[J] 2003．11(3)P161～162
6 董长虹主编 小波分析工具箱原理与应用 国防工业出版社 2004年1月第一版[M]
7 罗正发译 应新余校 小波与宽带相关处理 电子科技杂志 Vol．28 No．2 Jun．1994
8 徐佩霞 孙功宪 小波分析与实例(第二版) 中国科技技术大学出版社 2001年10月
2 李水根 吴纪桃 分形与小波 科学出版社(北京)2002年10月第一版[M]
3 Fujinobu Takahashi, Tetsuro Kondo Very Long Baseline Interferometer Ohmsha IOS Press[M]
4 夏海波 张来斌等 小波分析在管道泄漏信号识别中的应用 石油大学学报 Vol．27 No．2 Sum．136[J] P78～80
5 夏海波 张来斌等 基于GPS时间标签的管道泄漏定位方法 计算机测量与控制[J] 2003．11(3)P161～162
6 董长虹主编 小波分析工具箱原理与应用 国防工业出版社 2004年1月第一版[M]
7 罗正发译 应新余校 小波与宽带相关处理 电子科技杂志 Vol．28 No．2 Jun．1994
8 徐佩霞 孙功宪 小波分析与实例(第二版) 中国科技技术大学出版社 2001年10月