| 摘要 |
In a method and apparatus for reducing noise in an original signal which contains a linear time varying signal and the noise, the original signal is differentiated to obtain a differentiated original signal. The differentiated original signal is Fourier transformed to obtain power spectral densities of the differentiated original signal. A noise frequency is detected in a power spectral density spectrum of the obtained power spectral densities of the differentiated original signal. For the noise frequency, a corresponding noise component is determined. The noise component is subtracted from the original signal to obtain a noise reduced original signal. |
