Electronics and Communication Engineering - Signals and Systems - Discussion
Discussion Forum : Signals and Systems - Section 3 (Q.No. 2)
2.
which one is discrete time periodic signal?
Answer: Option
Explanation:
In Discrete time signal irrational function cannot be periodic, frequency must be rational.
Hence only (c) is periodic.
sin 3pn = sin 3p(n + N) ⇒ for Periodic 3pN = 2Kp
.
Discussion:
3 comments Page 1 of 1.
Shurti said:
10 years ago
Option A and B are also rational.
Geethika said:
9 years ago
A and B are irrational.
(1)
RISHI NIGAM said:
3 years ago
C is right, because the time period has to be rational for periodictity but in B and C irrational terms will arise which will not make it rational.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers