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Which of the following analog modulation scheme requires the minimum transmitted power and minimum channel bandwidth?
- a)VSB
- b)DSB-SC
- c)SSB
- d)AM
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
Which of the following analog modulation scheme requires the minimum t...
SSB (Single Sideband) Modulation
SSB modulation is the analog modulation scheme that requires the minimum transmitted power and minimum channel bandwidth among the given options.
Explanation:
- VSB (Vestigial Sideband) Modulation: VSB modulation is a type of amplitude modulation (AM) where one sideband and a portion of the other sideband are suppressed or attenuated. The main advantage of VSB is its compatibility with existing AM receivers, but it requires a larger bandwidth compared to other modulation schemes.
- DSB-SC (Double Sideband Suppressed Carrier) Modulation: DSB-SC modulation involves the suppression of the carrier signal along with one of the sidebands. It requires less power compared to full AM, but it still requires a relatively larger bandwidth.
- AM (Amplitude Modulation): In AM, the amplitude of the carrier signal is varied according to the message signal. It is a widely used modulation scheme but requires a significant amount of transmitted power and bandwidth.
- SSB (Single Sideband) Modulation: SSB modulation is a form of amplitude modulation where only one of the sidebands is transmitted, along with the carrier or a suppressed carrier. By transmitting only one sideband, SSB modulation reduces the required transmitted power and channel bandwidth significantly compared to other modulation schemes.
Advantages of SSB Modulation:
- Requires lower transmitted power: By transmitting only one sideband, SSB modulation reduces the power requirements, making it more efficient.
- Requires smaller channel bandwidth: Since only one sideband is transmitted, SSB modulation requires less bandwidth, allowing more efficient use of the available frequency spectrum.
- Better noise performance: SSB modulation eliminates one of the sidebands, reducing the effects of noise and interference.
- Improved range and coverage: The reduced power requirements and improved noise performance of SSB modulation allow for longer range and better coverage compared to other modulation schemes.
Therefore, among the given options, SSB modulation requires the minimum transmitted power and minimum channel bandwidth.
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Community Answer
Which of the following analog modulation scheme requires the minimum t...
The frequency spectrum of all the given modulation schemes is as shown:
Total power = Carrier power + Sideband power
In SSB, we have one sideband only hence the power is less than DSB and VSB.
In VSB, we have one sideband and some part of the other sideband and hence power is more than SSB and less than DSB.
In SSB, we have one sideband only hence the power is less than DSB and VSB.
In VSB, we have one sideband and some part of the other sideband and hence power is more than SSB and less than DSB.
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Which of the following analog modulation scheme requires the minimum transmitted power and minimum channel bandwidth?a)VSBb)DSB-SCc)SSBd)AMCorrect answer is option 'C'. Can you explain this answer?
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