Electronics and Communication Engineering - Communication Systems - Discussion


VSB modulation is preferred in TV because

[A]. it reduces the bandwidth requirement to half
[B]. it avoids phase distortion at low frequencies
[C]. it results in better reception
[D]. none of the above

Answer: Option A


VSB (vestigial side band) transmission transmits one side band fully and the other side band partially thus, reducing the bandwidth requirement.

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Pratap said: (Aug 18, 2016)  
Vsb is also avoided lower phase distortion because of the main purpose of design is that otherwise no difference between ssb and vsb. In vsb we need to must care about the design of the filter. Its fc at 0.5 amplitude must be otherwise phase distortion occurs at a lower frequency. Hence 2 nd option is also right. In a certain condition, 1st may be wrong because it's not exactly half. The frequency of vsb is fv+w. It's slightly greater than ssb.

Ravi said: (Oct 7, 2016)  
It's not VSB it's SSB.

Akarsh Agrawal said: (Feb 2, 2017)  
VSB doesn't reduce bandwidth requirement to half. The Option should be modified to less bandwidth as compared to DSB rather than half.

Rajkamal Chauhan said: (Apr 9, 2017)  
I think option D]. none of the above is correct.

Pradip said: (Jul 26, 2018)  
Option 2 is correct.

Kalyan said: (Mar 6, 2019)  
Reduction in bandwidth it is almost as efficient as the SSB.

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