ExplanationQuadrature phase shift keying is a modulation technique used for modulation of digital signals. In Quadrature phase shift keying four levels of voltage are used or four carrier signals of different phases are used. In following code simply the indexes of digital signal array are checked (two indexes at the same time) by using for loop and then depending upon bits carrier signal is changed, thus producing our desired results. It is checked that the two bits are (00, 01, 10, 11) and then carriers of different phases are assigned accordingly. Matlab Codeclose all;
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