Analog Transmission of Digital Data: ASK, FSK, PSK, QAM
FSK ? frequency of carrier signal is varied to represent binary 1 or 0. ? peak
amplitude .... QPSK = 4-PSK? PSK that uses phase shifts of 90º=?/2 rad ? 4
different ...
FSK ? frequency of carrier signal is varied to represent binary 1 or 0. ? peak
amplitude .... QPSK = 4-PSK? PSK that uses phase shifts of 90º=?/2 rad ? 4
different ...