In this problem, we use a sampling frequency of 8000 Hz. Design and simulate a digital oscillator where the impulse response is of the form h(n)=cos(ωω0n)u(n)
Calculate ωω0 such that the frequency of the oscillator is f = 200 Hz. Sketch the frequency response. (see the notes in the filter design section)
a) Give the transfer function of the digital systems.
b) Implement the digital system in MATLAB.
c) Determine the appropriate input excite the digital system and generate 10000 samples of the sin wave.
d) Plot the spectrogram of the sine wave.
e) make w0=2 (pi n(100+0.01n) n ) n=1:10000. Listen to the output the digital systems and plot the spectrogram

Write a computer program to calculate the three-phase fault current for a fault at f in figure 1.16, with the network normal, and with one line at a time removedproblems 1.1 write a computer program to calculate the three-phase fault current for a fault at f in figure 1.16, with the network normal, and with one line at a time removed 20 power system relaying from service. the positive-sequence impedance data are given in the accompanying table. use the commonly made assumption that all prefault resistance values are (1.0+j0.0) pu, and neglect all resistance values. calculate the contribution to the fault flowing through the cb b and the voltage at that bus. for each calculated case, consider the two possibilities: cb b2 closed or open. the latter is known as the stub-end fault í• figure 1.16 problem 1.1 system data for figure 1.16 from to positive sequence 0.0+j0.1 0.05j0.15 0.04 j0.2 0.01 jo. i 0.015 + j0.15 0.01 j0.19 0.01 +j0.19 0.03+j0.1 0.0+j0.08 6 6 6 from service. the positive-sequence impedance data are given in the accompanying table. use the commonly made assumption that all prefault resistance values are (1.0 + j 0.0) pu, and neglect all resistance values. calculate the contribution to the fault flowing through the cb b1, and the voltage at that bus. for each calculated case, consider the two possibilities: cb b2 closed or open. the latter is known as the “stub-end” fault.

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State 7 common key's for every keyboard