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Northwestern UniversityEECS 202HW5_Sol

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EECS 202: Introduction to Electrical Engineering SIGNALS, SYSTEMS, AND COMMUNICATIONS Homework 5 Solutions Due Friday, May 6, 2016 1. (a) This should be a smooth curve passing through the tops of ... all the sample lines (e.g. see Fig. 1(a)). (b) This should be a curve that cannot be accounted for using the samples alone (e.g. see Fig. 1(b)). (a) (b) Figure 1: Sample signals x(t) through samples x[n]. 2. (a) This should encompass the frequency range from 1 Hz to 10 Hz, as well as the corresponding negative frequencies (e.g. see Fig. 2(a)). (b) This should be a single line from 0 to 10 seconds, going from 1 Hz to 10 Hz in frequency (e.g. see Fig. 2(b)). The axis orientation can be switched. (a) (b) Figure 2: For the chirp signal - (a) Frequency spectrum and (b) Spectrogram. This study source was downloaded by 100000823950634 from CourseHero.com on 05-06-2021 19:55:33 GMT -05:00 https://www.coursehero.com/file/14534428/HW5-Sol/ This study resource was shared via CourseHero.com3. (a) !0 = gcd(8π, 12π, 16π) = 4π rad/sec ) f0 = 2 Hz. T0 = 1/f0 = 0.5 sec. (b) % Create time vector t = 0:.01:2; % Create signal x = cos(8*pi*t) + sin(12*pi*t) - 2*cos(16*pi*t+pi/4); % Plot the results figure;plot(t,x) xlabel(’Time (s)’) [Show More]

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