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提出一种信噪分离的新方法 .根据采样时间段内信号及其导数的特点定义频率 ,由此构造一种双正交基 ,使信号可以精确地表示为低频双正交基的线性组合 .在时频结合的基础上 ,导出了信噪分离的高精度方法 ,设计了配套算法 ,分析了这种方法的有效性 .此方法精度较高 ,便于综合应用时域和频域上的信号特征 ,可以处理多频段的信噪分离问题 .
A new method of signal-noise separation is proposed, in which the frequency is defined according to the characteristics of the signal and its derivatives during the sampling period, so that a bi-orthogonal basis is constructed so that the signal can be accurately expressed as a linear combination of low-frequency bi-orthogonal basis. Based on the combination of time and frequency, a high-precision method of signal-to-noise separation is derived, and ancillary algorithms are designed to analyze the effectiveness of this method. This method has high accuracy and is convenient for the comprehensive application of signal features in time domain and frequency domain , Can handle the multi-band signal-to-noise separation problem.