DSB-SC and SSB-SC

What is the primary advantage of DSB-SC modulation over conventional AM?

• Reduced power consumption

• Easier demodulation

• Increased bandwidth

• Better noise immunity

In DSB-SC, what happens to the carrier signal?

• It is amplified

• It is phase-shifted

• It is completely removed

• It is frequency doubled

Which demodulation technique is commonly used for DSB-SC signals?

• Envelope detection

• Coherent detection

• Frequency modulation

• Phase modulation

What is the minimum bandwidth required for DSB-SC transmission if the message signal bandwidth is W Hz?

• W Hz

• 2W Hz

• 3W Hz

• 4W Hz

The DSB-SC signal can be mathematically represented as:

• x(t)cos⁡(2πfct)x(t) \cos(2\pi f_c t)x(t)cos(2πfc​t)

• x(t)+cos⁡(2πfct)x(t) + \cos(2\pi f_c t)x(t)+cos(2πfc​t)

• x(t)sin⁡(2πfct)x(t) \sin(2\pi f_c t)x(t)sin(2πfc​t)
  
  

• x(t)=ej2πfctx(t) e^{j2\pi f_c t}x(t)ej2πfc​t

In DSB-SC modulation, how does the power efficiency compare to conventional AM?

• Lower efficiency

• No efficiency improvement

• Higher efficiency

• Same efficiency

What is the main disadvantage of DSB-SC?

• Requires a complex receiver

• Difficult to generate

• Uses too much bandwidth

• Has lower modulation index

Which of the following can be used to generate a DSB-SC signal?

• Product modulator
• Amplitude modulator
• Frequency modulator
• Phase modulator

What is the primary advantage of SSB over DSB-SC?

• Reduced bandwidth requirement

• Improved audio quality

• Lower frequency distortion

• Easier demodulation

The bandwidth required for SSB transmission is:

• 4W Hz

• 2W Hz

• W Hz

• 3W Hz