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Frequency mixer using MATLAB.

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1nandha

1nandha

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I have to design a mixer using MATLAB. I am new to MATLAB and dont know how to find the sum or difference (of 2 different frequencies sine and cosine wave) i.e mixer operations using MATLAB syntax. Please tell me the syntax or any links related to my problem?
 

Mixer is a multiplier. setup a notch filter (say IF freq for communication recievers). Filter out the required component.
 

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