Homework Answers
Name 2. (10 points) a) Find an expression for the Fourier Transform of the signal use...
Name 2. (10 points) a) Find an expression for the Fourier Transform of the signal use the tables provided. illutrated below- you may 1.5p 0.5 05 2 1.5 1 0.5 0 0.51 1.5 2 b) Using your result from part (a), find an expression for the Fourier Transform of the signal c) Using your result from part (a), find an expression for the Fourier Transform of the signal d) Note that the signal p(o) illustrated below can be expressed as...
7. The signal x(t) shown below is modulated (multiplied) by cos(10nt). Find the Fourier transform of...
7. The signal x(t) shown below is modulated (multiplied) by cos(10nt). Find the Fourier transform of x(t)cos(10nt) and neatly sketch the magnitude? Useful transform pairs. rect (9) = t sinc (); «(t)cos (Wgt) }(x(w+wo) + X(w – wo)); «(t – to) ~X(w)e-juto (10 points) x(+) 1 t
(b) Let X(ju) denote the Fourier transform of the signal r(t) shown in the figure x(t) 2 -2 1 2 Using the properties of the Fourier transform (and without explicitly evaluating X(jw)), ii. (5 pts)...
(b) Let X(ju) denote the Fourier transform of the signal r(t) shown in the figure x(t) 2 -2 1 2 Using the properties of the Fourier transform (and without explicitly evaluating X(jw)), ii. (5 pts) Find2X(jw)dw. Hint: Apply the definition of the inverse Fourier transform formula, and you can also recall the time shift property for Fourier Transform. (c) (5 pts) Fourier Series. Consider the periodic signal r(t) below: 1 x(t) 1 -2 ·1/4 Transform r(t) into its Fourier Series...
3) (Fourier Transforms Using Properties) - Given that the Fourier Transform of a signal x(t) is X(f) - rect(f/ 2), find the Fourier Transform of the following signals using properties of the Fourier...
3) (Fourier Transforms Using Properties) - Given that the Fourier Transform of a signal x(t) is X(f) - rect(f/ 2), find the Fourier Transform of the following signals using properties of the Fourier Transform: (a) d(t) -x(t - 2) (d) h(t) = t x( t ) (e) p(t) = x( 2 t ) (f) g(t)-x( t ) cos(2π) (g) s(t) = x2(t ) (h)p()-x(1)* x(t) (convolution)
3) (Fourier Transforms Using Properties) - Given that the Fourier Transform of a signal...
Question 6 Compute the Fourier transform for the signal shown in Figure 2 f(t) 10 t(s)...
Question 6 Compute the Fourier transform for the signal shown in Figure 2 f(t) 10 t(s) 2 Figure 2
Question 3: The Fourier transform of a signal r[n] is shown below. Draw the Fourier transform of the time-compressed signal r[5n and label appropriately :X(e.j) 03 02 Question 3: The Fourier tra...
Question 3: The Fourier transform of a signal r[n] is shown below. Draw the Fourier transform of the time-compressed signal r[5n and label appropriately :X(e.j) 03 02
Question 3: The Fourier transform of a signal r[n] is shown below. Draw the Fourier transform of the time-compressed signal r[5n and label appropriately :X(e.j) 03 02
(a) Write an expression for the time-domain signal shown; (6) Find the Fourier transform of the...
(a) Write an expression for the time-domain signal shown; (6) Find the Fourier transform of the signal; (c) If this signal is passed through an ideal lowpass filter with a cutoff frequency of 1 Hz, sketch the spectrum of the filter's output, including numerical labels on vertical and horizontal axes. g(t) 2 (s) Problem completed
Use direct integration to find the Fourier transform G(f ) of signal g(t) = exp (-2|t...
Use direct integration to find the Fourier transform G(f ) of signal g(t) = exp (-2|t −3|).
Let x(t) be the signal with Fourier transform Xjw) shown below x(j) Let Xs(t) be obtained...
Let x(t) be the signal with Fourier transform Xjw) shown below x(j) Let Xs(t) be obtained by sampling x(t) with sampling period Td let xdin]- x(nT) for all integer n. Which option is the plot of Xd(e the Fourier transform of xdinj? Instructions: First sketchXs ω which is the Fourier transtorm of xs nt is going to be infinite number of replicas of Sketch on 3 e cas. You need to n he span between heep as he )and Xole...
4. Given that x(t) has the Fourier transform X(a), p(t) is a periodic signal with frequency...
4. Given that x(t) has the Fourier transform X(a), p(t) is a periodic signal with frequency of ??. p(t)-??--o nejnaot, where Cn is the Fourier series coefficient of p) (1) Assume y(t)-x(t)p(t), determine Y(?), the Fourier transform of the modulated signal y(t) in terms of X(). (2) Given the spectrum sketch of x(?) shown below, p(t)-cos(2t) cos(t), determine and sketch the Y() X(w) -1
Name 2. (10 points) a) Find an expression for the Fourier Transform of the signal use the tables provided. illutrated below- you may 1.5p 0.5 05 2 1.5 1 0.5 0 0.51 1.5 2 b) Using your result from part (a), find an expression for the Fourier Transform of the signal c) Using your result from part (a), find an expression for the Fourier Transform of the signal d) Note that the signal p(o) illustrated below can be expressed as...
7. The signal x(t) shown below is modulated (multiplied) by cos(10nt). Find the Fourier transform of x(t)cos(10nt) and neatly sketch the magnitude? Useful transform pairs. rect (9) = t sinc (); «(t)cos (Wgt) }(x(w+wo) + X(w – wo)); «(t – to) ~X(w)e-juto (10 points) x(+) 1 t
(b) Let X(ju) denote the Fourier transform of the signal r(t) shown in the figure x(t) 2 -2 1 2 Using the properties of the Fourier transform (and without explicitly evaluating X(jw)), ii. (5 pts) Find2X(jw)dw. Hint: Apply the definition of the inverse Fourier transform formula, and you can also recall the time shift property for Fourier Transform. (c) (5 pts) Fourier Series. Consider the periodic signal r(t) below: 1 x(t) 1 -2 ·1/4 Transform r(t) into its Fourier Series...
3) (Fourier Transforms Using Properties) - Given that the Fourier Transform of a signal x(t) is X(f) - rect(f/ 2), find the Fourier Transform of the following signals using properties of the Fourier Transform: (a) d(t) -x(t - 2) (d) h(t) = t x( t ) (e) p(t) = x( 2 t ) (f) g(t)-x( t ) cos(2π) (g) s(t) = x2(t ) (h)p()-x(1)* x(t) (convolution)
3) (Fourier Transforms Using Properties) - Given that the Fourier Transform of a signal...
Question 6 Compute the Fourier transform for the signal shown in Figure 2 f(t) 10 t(s) 2 Figure 2
Question 3: The Fourier transform of a signal r[n] is shown below. Draw the Fourier transform of the time-compressed signal r[5n and label appropriately :X(e.j) 03 02
Question 3: The Fourier transform of a signal r[n] is shown below. Draw the Fourier transform of the time-compressed signal r[5n and label appropriately :X(e.j) 03 02
(a) Write an expression for the time-domain signal shown; (6) Find the Fourier transform of the signal; (c) If this signal is passed through an ideal lowpass filter with a cutoff frequency of 1 Hz, sketch the spectrum of the filter's output, including numerical labels on vertical and horizontal axes. g(t) 2 (s) Problem completed
Let x(t) be the signal with Fourier transform Xjw) shown below x(j) Let Xs(t) be obtained by sampling x(t) with sampling period Td let xdin]- x(nT) for all integer n. Which option is the plot of Xd(e the Fourier transform of xdinj? Instructions: First sketchXs ω which is the Fourier transtorm of xs nt is going to be infinite number of replicas of Sketch on 3 e cas. You need to n he span between heep as he )and Xole...
4. Given that x(t) has the Fourier transform X(a), p(t) is a periodic signal with frequency of ??. p(t)-??--o nejnaot, where Cn is the Fourier series coefficient of p) (1) Assume y(t)-x(t)p(t), determine Y(?), the Fourier transform of the modulated signal y(t) in terms of X(). (2) Given the spectrum sketch of x(?) shown below, p(t)-cos(2t) cos(t), determine and sketch the Y() X(w) -1
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