FFT of a sine sweep
12 ビュー (過去 30 日間)
古いコメントを表示
I have generate a sine sweep signal with start frequency of 10Hz and stop frequency of 200Hz for a period of 10 Seconds for peak to peak amplitude of 1V and DC offset of 0.5V. Sampling rate was 2000 samples/sec.
I did the FFT for this signal and I get the expected plateau in the frequency range of 10 Hz to 200 Hz. However I am not able to co-relate the amplitude of FFT and amplitude of input sine wave.
IS there a relation between them ?
0 件のコメント
回答 (1 件)
José Goulart
2011 年 2 月 28 日
Yes, there is.
In fact, the expression of the Fourier Transform for a linear sweep involves a constant of A/2, where A is the amplitude of the sweep.
For the complete expression, see Aldrige, 1992 - Mathematics of Linear Sweeps. Canadian Journal of Exploration Geophysics, vol. 28, no. 1, pp 62-68.
0 件のコメント
参考
カテゴリ
Help Center および File Exchange で Fourier Analysis and Filtering についてさらに検索
製品
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!