What is DSB-SC demodulation?
Advertisements. The process of extracting an original message signal from DSBSC wave is known as detection or demodulation of DSBSC. The following demodulators (detectors) are used for demodulating DSBSC wave.
Is it possible to demodulate a DSB LC signal a DSB-SC signal?
In order to demodulate a DSB-SC signal, another product modulator acting at the original carrier frequency must be used. This uses a phase discriminator to approximate the carrier signal. Double sideband-large carrier (DSB-LC) This is the standard broadcast AM that we’re all used to.
What is difference between AM and DSB-SC?
Double-sideband suppressed-carrier transmission (DSB-SC) is transmission in which frequencies produced by amplitude modulation (AM) are symmetrically spaced above and below the carrier frequency and the carrier level is reduced to the lowest practical level, ideally being completely suppressed.
What are the benefits of using DSB-SC instead of DSB-FC?
The advantages of SSB-SC over DSB-FC signal are :
- Less bandwidth requirements . This allow more number of signals to be transmitted in the same frequency range .
- Lots of power saving . This is due to the transmission of only one sideband component .
- Reduced interference of noise . This is due to the reduced bandwidth .
Is there an efficient way to demodulate a DSB-SC signal?
I don’t believe that the FFT is an efficient approach for this. A straight forward approach to demodulate a DSB-SC signal for comparison is to simply multiply the signal with the recovered carrier.
How is the carrier signal used in DSBSC?
Here, the same carrier signal (which is used for generating DSBSC signal) is used to detect the message signal. Hence, this process of detection is called as coherent or synchronous detection. Following is the block diagram of the coherent detector.
What does it mean to demodulate a signal?
Demodulating a signal means to get back your original signal that was actually transmitted by any modulating techniques, or rather types. If the message is transmitted after modulating its amplitude, it’s called amplitude modulation. This amplitude modulation could be further classified into : DSB-FC, DSB-SC, SSB.
How does a low pass filter work in DSBSC?
The resulting signal is then passed through a Low Pass Filter. Output of this filter is the desired message signal. Where, ϕ is the phase difference between the local oscillator signal and the carrier signal, which is used for DSBSC modulation. Substitute, s ( t) and c ( t) values in the above equation.