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Matlab Examples - Amplitude Demodulation Using Synchronous Detection
Here is a Matlab demonstration using Simulink on synchronous detection.
Synchronous detection is used to demodulate Double Sideband Suppressed Carrier AM (DSB-SC AM). Also known as coherent or homodyne detection, the scheme requires phase information to track the phase drift of the transmitted carrier in order for this detection scheme to work.
A basic component used to achieve this detection scheme is a phase-locked loop (PLL) circuit. The PLL circuit is more complicated than the envelope detection scheme consisted of a simple diode and parallel connection between resisstor and capacitor (low-pass filter) to be discussed in a later article.
In synchoronous detection, you need a local oscillator that is in-phase to the transmitted carrier and a low pass filter. The low pass filter gets rid of the high carrier frequencies and passes the low frequency message.
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Synchronous detection is used to demodulate Double Sideband Suppressed Carrier AM (DSB-SC AM). Also known as coherent or homodyne detection, the scheme requires phase information to track the phase drift of the transmitted carrier in order for this detection scheme to work.
A basic component used to achieve this detection scheme is a phase-locked loop (PLL) circuit. The PLL circuit is more complicated than the envelope detection scheme consisted of a simple diode and parallel connection between resisstor and capacitor (low-pass filter) to be discussed in a later article.
In synchoronous detection, you need a local oscillator that is in-phase to the transmitted carrier and a low pass filter. The low pass filter gets rid of the high carrier frequencies and passes the low frequency message.
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