This video tutorial shows how to create a simulink model of Standard AM in matlab with coherent detection. Standard AM also known as conventional AM or simple DSB(double sideband) AM or DSB large carrier is a amplitude modulation technique in which carrier is sent alongwith the message signal and the both the sidebands of signal after modulation is transmitted. Hence the disadvantage of Standard AM is the increased power requirement at the transmitter. The benefit is that carrier signal can be extracted from the transmitted standard AM signal and thus non coherent receiver can be build, meaning that the receiver complexity is reduced.
The video below shows the AM modulation and demodulation, where the demodulation is of the coherent type, meaning that the carrier signal is generated by the receiver(and not extracted). The frequency of the message and carrier are 200Hz and 1500Hz respectively. At the receiver the butterworth LPF and butterworth HPF is used to recover the transmitted message. The HPF blocks the DC component that appears in the received signal.
Reader may also be interested in download matlab 2012 and download matlab 2013 blog post.
The video below shows the AM modulation and demodulation, where the demodulation is of the coherent type, meaning that the carrier signal is generated by the receiver(and not extracted). The frequency of the message and carrier are 200Hz and 1500Hz respectively. At the receiver the butterworth LPF and butterworth HPF is used to recover the transmitted message. The HPF blocks the DC component that appears in the received signal.
Reader may also be interested in download matlab 2012 and download matlab 2013 blog post.
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