railway RRB JE (CBT I + CBT II) Mock Test 2024 Communication Systems Passband Transmission Quadrature Phase Shift Keying (QPSK)
In which modulation technique is the carrier modulated using phase shifts of 0°, 90°, 180°, and 270°?
1
QPSK (Quadrature Phase Shift Keying)
2
ASK (Amplitude Shift Keying)
3
BPSK (Binary Phase Shift Keying)
4
FSK (Frequency Shift Keying)