FFT of a sine sweep
조회 수: 21 (최근 30일)
이전 댓글 표시
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 ?
댓글 수: 0
답변 (1개)
José Goulart
2011년 2월 28일
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.
댓글 수: 0
참고 항목
카테고리
Help Center 및 File Exchange에서 Fourier Analysis and Filtering에 대해 자세히 알아보기
제품
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!