Super wide-range variable-rate timing recovery scheme and implementation
Zhang Guo-jing · Systems engineering and electronics · 2006
To investigate the reception of multi-rate satellite signals,a super wide-range variable-rate digital timing recovery algorithm is proposed,which is suitable for QPSK signals with rates ranging from 20 Mbps to 320 Mbps.Based on the direct digital synthesizer(DDS),the algorithm uses the structure of DPLL comprised of lead-lag phase detector for timing recovery.Furthermore,new methods derived from time-domain analysis are presented to widen the acquisition range and reduce timing jitter.Simulation and implementation results show the super wide acquisition range and good timing-jitter performance under practical conditions.