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?

A coherent QPSK demodulator is required on the ground for receiving da

1.	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?
A.	1st order
B.	2nd order
C.	3rd order
D.	None of the above
Answer» D. None of the above

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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?

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