1. Engineering
  2. Electrical Engineering
  3. 5 consider a time series a cos 2tht bcos...

Question: 5 consider a time series a cos 2tht bcos...

Question details

5. Consider a time series: A cos 2Tht + Bcos 2π/2 t , where A 1.0 and B-1.0; fi=2.0 Hz and f2=4.0 Hz. (a) The sampling rate is 5 Hz (5 points per sec or A-0.2 sec/point) and total number of point N-64 (duration is 12.8 sec) is used. Determine the Fourier amplitude spectrum (using FFT) of the given signal. Discuss the result. (b) The sampling rate is 10 Hz (10 points per sec or Δ-0.1 sec/point) and total number of point N-128 (duration is 12.8 sec) is used. Determine the Fourier amplitude spectrum (using FFT of the given signal. Discuss the result. Use MATLAB code on FFT: Y=fft(x,n) ; see Lecture note-2 (revised) page: 38 ]

Solution by an expert tutor
Blurred Solution
This question has been solved
Subscribe to see this solution