Question

The following question has to be implemented using matlab programming and fdatool

a. Extract samples of a music file of a suitable format (sample.mp3, made available on the moodle) providing a duration of 2 seconds playtime, add a colored noise centered around 4.5kHz to the extracted samples so that the SNR is -15 dB.

b. Realize an FIR (hamming) and IIR lowpass filter of order 10 having a cutoff frequency of 3kHz respectively. (Obtain the sampling frequency value from the property of .mp3 file used).

c. Plot the spectrum of original signal and signal resulting from each of the filters implemented in part b. Assume scale (-? to ? radians)        

d. Critically analyze for each filter, the results obtained in terms of the SNR at the output, order of filter, complexity of structure, location of poles and zeros, magnitude and phase response

e. Use sound function could be used play the recorded, noisy and processed file.

Answer 1

the matlab code is