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(i) Analog signals (ii) Digital signals (iii) Time-invariant syst

(i) Analog signals (ii) Digital signals (iii) Time-invariant syst

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Q1(a) Define the following with an example for each. (i) Analog signals (ii) Digital signals (iii) Time-invariant systems (iv) Linear systems (b) Determine whether the following signals are periodic. If periodic, obtain the fundamental period of these signals. (i) f(t) = 1.5 sin(23t + (ii) g(t) = 4 cos-t + 2 sin t (c) When a signal is considered to be a power signal or an energy signal? Also, suggest an example for a power signal as well as for an energy signal. (d) Solve iteratively y[n + 2] + 4y[n + 1] + 0.3y[n] = 2x[n + 2] + 3x[n + 1] with initial conditions y[-1] = -2 and y[-2] = -3 and a causal input x[n] = 2n (starting at n = 0). Obtain the first three terms of y[n].
Transcribed Image Text:Q1(a) Define the following with an example for each. (i) Analog signals (ii) Digital signals (iii) Time-invariant systems (iv) Linear systems (b) Determine whether the following signals are periodic. If periodic, obtain the fundamental period of these signals. (i) f(t) = 1.5 sin(23t + (ii) g(t) = 4 cos-t + 2 sin t (c) When a signal is considered to be a power signal or an energy signal? Also, suggest an example for a power signal as well as for an energy signal. (d) Solve iteratively y[n + 2] + 4y[n + 1] + 0.3y[n] = 2x[n + 2] + 3x[n + 1] with initial conditions y[-1] = -2 and y[-2] = -3 and a causal input x[n] = 2n (starting at n = 0). Obtain the first three terms of y[n].
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