Electronics and Communication Engineering - Communication Systems - Discussion
Discussion Forum : Communication Systems - Section 1 (Q.No. 32)
32.
If the bandwidth is increased by 2, the γFM γAM (where γ is the ratio of SNR of output to SNR at input, FM is frequency modulation and AM is amplitude modulation) is increased by a factor of
Answer: Option
Explanation:
Doubling of frequency increase SNR in frequency modulation by 4. It has no effect in AM.
Discussion:
10 comments Page 1 of 1.
Rejin said:
5 years ago
Please explain it.
Durgesh said:
7 years ago
Nice, thanks @Manoj.
Manoj Mondal said:
7 years ago
F=3/2* mf^2 for FM and for AM F={m^2/ (2+m^2)}.
Here for FM, it will be 2^2=4 and AM it is same.
So the answer is 4.
Here F=Figure of merit.
Here for FM, it will be 2^2=4 and AM it is same.
So the answer is 4.
Here F=Figure of merit.
Miraya said:
7 years ago
Yes you are right @Shadan.
Shadan said:
8 years ago
SNR is directly proportional to Bandwidth, Square bandwidth is inversely proportional to noise.
Aishwarya said:
8 years ago
Due to the doubling of frequency, the SNR in FM is also increased twice and hence is given as 4. Whereas the frequency has no(less) effect in AM, hence is not considered.
P.S: this is what ive understood. do correct me, if it is an mistake.
P.S: this is what ive understood. do correct me, if it is an mistake.
Maneesha said:
9 years ago
Anybody, please give the clear explanation about the question.
Raj said:
10 years ago
Anyone explain this question answer?
Awani said:
1 decade ago
Please explain.
Megha said:
1 decade ago
Please explain this questions.
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