railway RRB JE (CBT I + CBT II) Mock Test 2024 Communication Systems Passband Transmission Quadrature Phase Shift Keying (QPSK)
A coherent QPSK demodulator is required on the ground for receiving data from an LEO satellite. What should be the optimum order of PLL in the carrier phase tracking loop?
1
1st order
2
2nd order
3
3rd order
4
None of the above