Electronics and Communication Engineering - Signals and Systems - Discussion
Discussion Forum : Signals and Systems - Section 3 (Q.No. 16)
16.
Which one is a non-causal system?
Answer: Option
Explanation:
Because in (a) if you put n = 1 then y(n) = x(2) which shows output depend upon future value.
While in (b), (c) input converted to Past or Present and past.
Note that n cannot be in fraction so for x(n/2) you will put n = 2, 4, ... etc. not 1, 3, 5 .... etc.
Discussion:
2 comments Page 1 of 1.
Nitin said:
1 decade ago
In b and c, if you put n=-2 then output will be depends on n=-1 as x(-2/2) = x(-1).
Which is future value so all are non causal systems?
Which is future value so all are non causal systems?
Midhun Joy said:
3 years ago
I think it should be option D.
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