engineering recuitment GATE ECE 2023-24 Test Series Communication Systems Passband Transmission Differential Phase Shift Keying (DPSK)
The message bit sequence in a DPSK modulator is 1, 1, 1, 1, 0, 1. The phase of carrier signal at receiver for first two message bits is π, π. The carrier phase for the remaining four message bits is
1
π, π, 0, π
2
π, 0, π, π
3
π, π, 0, 0
4
π, 0, 0, π