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1. Assume that an N-point DFT, performed on an N-sample x(n) time-domain sequence, results in a DFT frequency-domain sample spacing of 100 Hz. What would be the DFT frequency-domain sample spacing in Hz if the N-sample X(n) time sequence was padded with 4N zero-valued samples and we performed a DPT on that extended-time sequence?
2. This problem tests your understanding of the DFT's frequency-domain axis. Consider sampling exactly two cycles of an analog x(t) cosine wave resulting in the 8-point x2(n) time sequence in Figure P3-21(a). The real part of the DFT of xi(n) is the sequence shown in Figure P3-21(b). Because xi(n) is exactly two cycles of a cosine sequence, the imaginary parts of Xl(m) are all zero-valued samples, making | Xi(m)| equal to the real part of X2(m). (Note that no leakage is apparent in |X1(m)|.) Think, now, of a new frequency-domain sequence X2(m) that is equal to X1(m) with eight zero-valued samples, the white squares in Figures P3-21(c) and P3-21(d), inserted in the center of the real and imaginary parts of X1(m).
(a) Draw the x2(n) time sequence that is the inverse DFT of X2(m).
(b) Comment on how the x2(n) time sequence is related to The original analog x(t) signal and the x1(n) sequence.
The nameplate on a 50-MVA, 60-Hz single-phase transformer indicates that it has a voltage rating of 8.0-kV: 78-kV. An open-circuit test is conducted from the low-voltage side, and the corresponding instrument readings are 8.0kV, 62.1A, and 206kW.
Important information about Digital signal processing, (a) Design a lowpass FIR digital filter using "remez" routime in Matlab for the following specifications:
Explain why it is important that the stimulus waveforms signals in a test waveform bench be synchronized to the inactive edge ofthe clock of the sequential circuit to be tested.
Describe three methods of comparing techniques to improve the first swing electromechanical transient behaviour of such a generator.
There are 5280 feet per mile. There are 3 feet in a yard. Use appropriate parameter passing and return mechanisms. Use appropriate datatypes. For example, with inputs of 1760 yards and 1320 ft, the result would be 1.25 miles.
An otherwise-ideal op amp, known to have an open loop gain of 10^4 V/V , is measured in a circuit to have an output voltage of -3 V. While it would be difficult to measure, what would you expect the voltage from the negative terminal
A 200 ft length of solid copper wire is measured to have a resistance of .500 Ohms. a. Determine the cross sectional area of the wire in both square mils and in circular mils. b. Determine the diameter of the wire in mils and in inches.
1- Name a few computer operating systems. 2- What is the full form for MS-DOS 3- What is the difference between a logical address and aphysical address
Calculate the divide-by-N value required to produce a 1.190 MHz frequency using a 10.24 MHz crystal on the 145106 with a divide-by-1024 crystal circuit. What is the range of frequencies directly usable with this configuration
Two bit Analog -to -digital converter-MatLab (711) Let X(t)= 0.8 cos(2*pi*t)+ 0.15, 0
Suppose unchirped Gaussian pulses at f = 1:55 fm are used to transmit binary data. You're given that the fiber dispersion parameter f = 17 ps/km-nm, and the dispersion length LD = 115 km. What is the half-width of the pulse at the origin
Current Pulses over a Twisted Pair Telephone Line, A twisted pair telephone line has a constant attenuation between 0 Hz and 3300 Hz and linear phase shift with frequency
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