2.3-3 For the signal g(t) shown in Fig. P2.3-3, sketch (a) g(t - 4); (b) 8...
2.3 Suppose the current flowing through a wire is given by the curve shown in Figure P2.3. 0 8 9 10 s) 12 345 67 8 9 10 2 Figure P2.3 a. Find the amount of charge, q, that flows through the wire between 0 and 2 1 s b. Repeat part a for t2 2, 3,4,5, 6,7,8,9, and 10 s. c. Sketch qt) for 0 10s. 2.3 Suppose the current flowing through a wire is given by the curve...
For the signal g(t) shown in the following figure: a. Sketch the signals: 4. i) g(20) ii) g(t-12) iii) g(6t) iv) g(3-t) find the energies of all the signals in part (a) b. g(t) 0.5 0 12 15 24
5.1-2. A baseband signal m(t) is the periodic sawtooth signal shown in Fig. P5.1-2. (a) Sketch rm (1) and pM () for this signal m(t) if we = 270 x 100, ky = 2000, and kp = 1/2 (b) Show that the PM signal is equivalent to a PM signal modulated by a rectangular periodic message. Explain why it is necessary to use kp < in this case. [Note that the PM signal has a constant frequency but has phase...
4.4-6 An LSB signal is demodulated coherently, as shown in Fig. P4.4-6. Unfortunately, because of the transmission delay, the received signal carrier is not 2 cos Wet as sent, but rather, is 2 cos[wc + Aw)t + 8). The local oscillator is still cos wct. Show the following. (a) When 8 = 0, the output y(t) is the signal m(t) with all its spectral components shifted (offset) by Ao. Hint: Observe that the output y(t) is identical to the right-hand...
Fig.1 (a) shows a staircase like signal x(t) and Fig.1 (b) shows the rectangular pulse g(t) Express x(t) in terms of g(t). xit) 4 2 g(t) -1 0 1 Fig.1
Question 4 Given z(t) as shown in the figure a) Sketch z(t 1) b) Sketch a(t -2) c) Sketch z(2t +1) d) Sketch r(4-t/2) 2.5 115 Question 5 Given z(t) as shown in the figure, sketch -3zt 0
2. Find and sketch the magnitude spectra for the periodic square pulse train signal x(t) shown in the figure below for a) d = T/4 and b) d = 7/8
4.3-3 For the AM signal with m(t) shown in Fig. P4.3-2 and u =0.8: (a) Find the amplitude and power of the carrier. (b) Find the sideband power and the power efficiency n. Figure P.4.3-2 10 m(t) -10-2 → - 10
A signal f(t) sinc (200 t) is sampled by periodic pulse train pr(t) resented in Fig. P5.1-6. Find and sketch the spectrum of the sampled signal. Explain if you 0.8 ms 4 ms 8 ms Fig. P5.1-6 will be able to reconstruct f(t) from these samples. If the sampled signal is passed through an ideal lowpass filter of bandwidth 100 Hz and unit gain, find the filter output. What is the filter output if its bandwidth is B Hz, where...
2-27 Find and sketch c(t) = x(t) *8(t) for the func- tions depicted in Fig. P2-27. میر 2 ج Figure P2-27 2-29 Use Eq. (2.46) to find the convolution of r(t) and w(t), shown in Fig. P2-29. w(t) 2 1 - (b) Figure P2-29