Electronics and Communication Engineering - Communication Systems - Discussion
Discussion Forum : Communication Systems - Section 2 (Q.No. 46)
46.
The Hilbert transform of cos ω1t + sin ω2t is
Answer: Option
Explanation:
J[s(t)] = s(t + 90°).
Discussion:
4 comments Page 1 of 1.
Shadab Akhtar said:
9 years ago
The answer should be sin(omega1)t - cos(omega2)t.
Because Hilbert transform is a nonlinear system which provides 90 shift. In option 2 there must be a (-) sign instead of (+) sign.
Because Hilbert transform is a nonlinear system which provides 90 shift. In option 2 there must be a (-) sign instead of (+) sign.
Vivek said:
5 years ago
I think the option is D as sin(90 + t) = cos t and cos (90 + t ) = - sint.
Vini said:
1 decade ago
Hilbert transform provides negative 90 shift for positive frequency.
Prasad said:
7 years ago
I think it is Option D.
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