defence exam CRPF ASI Technical Mock Test 2023 Communication Systems Passband Transmission Quadrature Phase Shift Keying (QPSK)
A carrier is modulated by a digital bit stream having one of the possible phases of 0°, 90°, 180°, and 270°. Then the modulation is termed as
1
BPSK
2
QPSK
3
QAM
4
MSK