(a) Find the spectrum of this waveform:  x = [ exp( -[0:1:49]/10), exp(-[50:-1:1]/10)]. Subplot only the magnitude by using the spectrum program from the class notes.

(b) Using this information from the 100-point DFT, re-create the waveform by summing the sinusoidal contributions from all the DFT coefficients as done in lecture. Show both the waveform x and its re-creation xhat on another subplot. (The waveforms might merge into one figure so the mean square error is effectively zero in this case.)

(d)  Using MATLAB, find the index n0 at which the spectral magnitude falls below 0.05 of its maximum (which is a point beyond which there is little energy left in the higher frequencies.)

(e)   Using only the first n0 DFT coefficients, generate the waveform and plot in Matlab by using the symmetry properties of the transform. Plot xhat over the actual signal and annotate the plot to indicate the value of the calculated mse. Title and label the axes. Submit plot and code.

Posted Date: 3/8/2013 4:42:18 AM | Location : United States

Ask an Expert

Related Discussions:- Find the spectrum of waveform, Assignment Help, Ask Question on Find the spectrum of waveform, Get Answer, Expert's Help, Find the spectrum of waveform Discussions

Write discussion on Find the spectrum of waveform
Your posts are moderated

Write your message here..

Related Questions

Write a script file which will determine the displacement, The mass of the ... The mass of the spring-mass-damper system shown below was initially displaced by 1 meter to the right and then released. The subsequent acceleration of the mass was measured using

Population pyramid, I want to write a function in matlab which gives me a p... I want to write a function in matlab which gives me a population pyramid bar chart. could you please help me do this.

String, how to convert char array to a string cell how to convert char array to a string cell

Solve the system of linear equations - matlab, Problem 1.  Use Matlab to so... Problem 1.  Use Matlab to solve the following system of linear equations: 2x + y + 3z = 1 2x + 6y + 8z = 3 6x + 8y + 18z = 5 Capture Matlab code and the result in a text fi

Rules for variable names, Rules for variable names: In addition, the v... Rules for variable names: In addition, the variable names must always be mnemonic that means they should make some sense. For illustration, if the variable is storing the radi

Electrical Principles, matlab programming matlab programming

Matlab, giv a malab code for offline signature veification and recognition giv a malab code for offline signature veification and recognition

Offline signature verification, have any code have any code

Show the output - algorithms, Show the output - algorithms: Where does... Show the output - algorithms: Where does the output go? The two possibilities are (i) to an external file, or (ii) to a window on the screen. Based on system, one of these wil

Find and plot the magnitude of the dtft, An FIR filter has coefficients b =... An FIR filter has coefficients b = [ 1.0000   -0.6387    1.0214    0.8210   -0.7470    1.0920 ] (a) Find H(z) for the filter and plot its frequency response (magnitude and phase