摘要
实信号可以用谐波信号来描述,谐波信号的系数、相位角由实信号的双谱振幅谱、相位谱推算得到,由此实现对实信号的重构,即双谱信号重构。在信号重构过程中,通过缩小信号的采样间隔可以实现数据的内插。数值模拟和实际应用结果表明,对于重力异常等具有确定性分布的信号,用基于双谱信号重构的数据插值方法内插出来的数据具有高保真性。
A real signal can be represented by a harmonic signal.The coefficient and phase angle of the harmonic signal is estimated from the amplitude spectrum and phase spectrum of the real signal’s bispectrum.The reconstruction of a real signal accomplished in this way is called bispectrum reconstruction.Data interpolation is achieved by reducing the sample interval of the signal during the reconstruction of the signal.Tests on model and real data showed the reconstructed data are of high fidelity if the original data have a deterministic distribution like gravimetric survey data.
出处
《勘探地球物理进展》
2009年第5期326-329,307,共4页
Progress in Exploration Geophysics
基金
国家高技术研究发展计划(863)项目(2008AA06Z202)
国家科技重大专项(2008ZX07005)资助
关键词
双谱分析
信号重构
数据插值
高精度重力
高保真
bispectrum estimation
signal reconstruction
data interpolation
high-precision gravimetric survey
high fidelity
