| 摘要 |
<p>The method involves determining power spectrum density relevant for a received radar signal by calculating spectral values of a spectrogram and conjugated-complex spectral values of a conjugated-complex spectrogram by a Fourier-transformation by using a Fourier-transformer (3). The power spectrum density is used for determining periodic signal portions in the received radar signal. The determined spectral values of the spectrogram and the conjugated-complex spectrogram are overlapped, where inverted frequency of fundamental waves corresponds to periodic time of the signal portions. An independent claim is also included for a device for determining periodic signal portions in a received radar signal.</p> |
