AM and DSBSC waveform comparison ?

In summary, AM (amplitude modulation) and DSBSC (double-sideband suppressed carrier) waveforms differ in terms of how they carry information - AM uses the amplitude of the carrier wave, while DSBSC uses sidebands. AM requires a wider bandwidth, making it more susceptible to noise interference, while DSBSC only requires half the bandwidth. The receiver circuits for AM and DSBSC also differ, with AM using a diode detector and DSBSC using a product detector. While AM is more commonly used in communication systems, DSBSC is preferred for bandwidth-sensitive applications such as broadcasting.
  • #1
fran1942
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Hello, I am wondering what sort of visual differences you would see between an AM modulated waveform with carrier and a DSBSC waveform (suppressed carrier) in the time domain on an oscilloscope.

Any help would be appreciated.
 
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  • #2
Hi fran1942! In DSBSC the RF signal peaks when the modulating signal both peaks and dips. www.egr.uh.edu/courses/ece/ece4371/ece4117_files/A1_manual_pp33_46.pdf

Also, if you are studying it in depth: http://cnx.org/content/m32165/latest/
 
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FAQ: AM and DSBSC waveform comparison ?

What is the difference between AM and DSBSC waveforms?

The main difference between AM (amplitude modulation) and DSBSC (double-sideband suppressed carrier) waveforms is that AM carries information in the amplitude of the carrier wave, while DSBSC carries information in the sidebands on either side of the carrier wave.

How do AM and DSBSC waveforms compare in terms of bandwidth usage?

AM waveforms require a wider bandwidth to transmit information, as the entire carrier wave is modulated. DSBSC waveforms, on the other hand, only require half of the bandwidth as the carrier wave is suppressed.

Which waveform is more susceptible to noise interference?

AM waveforms are more susceptible to noise interference, as any noise added to the carrier wave will directly affect the transmitted signal. DSBSC waveforms, with their suppressed carrier, are less affected by noise interference.

How do the receiver circuits differ for AM and DSBSC waveforms?

The receiver circuits for AM and DSBSC waveforms differ in terms of demodulation techniques. AM receivers use a diode detector to extract the original signal, while DSBSC receivers use a product detector to demodulate the signal.

Which waveform is more commonly used in communication systems?

AM waveforms are more commonly used in communication systems, as they are simpler to implement and require less complex receiver circuits. DSBSC waveforms are typically used in applications where bandwidth efficiency is crucial, such as in radio and television broadcasting.

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