railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test Communication Systems Passband Transmission Quadrature Phase Shift Keying (QPSK)
If the carrier modulated by a digital bit stream had one of the possible phases of 0°, 90° 180° and 270° then the modulation is called
1
BPSK
2
QPSK
3
QAM
4
MSK