Table 2: The performance advantage of our QPSK ADCRL in locked-in frequency range.

SNRArchitectureMaximal locked-inLocked-in time (ms)Steady-phase error (degree)
Frequency Range (KHZ)

20 dbQPSK ADCOL±1700.18Approximating to 0
20 dbOur QPSK ADCRL±6800.05Approximating to 0
5 dbQPSK ADCOL±1200.4Approximating to 2
5 dbOur QPSK ADCRL±5100.13Approximating to 4