Abstract：A novel Digital Phase-Tracking Loop(DPTL) thoroughly eliminating "hangup" effect in high SNR is proposed to fulfil fast phase acquisition. The theory of finite Markov chains is utilized to evaluate the phase acquisition time in the presence of additive band-limited white Gaussian noise. Both of the calculated and simulated results indicate that the "hangup" effect leading to prolonged phase transients owing to the presence of the dead zone around rad is effectively removed so phase acquisition time of the described DPTL is much shorter than that of the conventional zero-crossing DPLL utilizing a dead zone quantizer. The DPTL
can be used in such applications as distance measurement where the frequency of the received signal is known,
2001, Vol. 23 
