Electronics and Communication Engineering - Communication Systems - Discussion

Discussion Forum : Communication Systems - Section 5 (Q.No. 20)
20.
The most suitable method for detecting a modulated signal g(t) = (3 to 6 cos 2pfmt) cos 2pfct is
envelope detector
synchronous detector
ratio detector
both a and b
Answer: Option
Explanation:

Because it is an AM envelope.

Discussion:
2 comments Page 1 of 1.

Amod kumar jha said:   8 years ago
But it is an over modulated signal since u = 2,
So,
Envelope detection will give distortion.
So, the Answer would be B.

Rahul said:   4 years ago
Since here modulation index, μ = 2 > 1.

Hence signal can't be detected by envelop detector and synchronous detector. Hence alternative (B) is the correct choice.

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