It was proved that the TDT (timing with a dirty template) blind timing algorithm was only suitable for PAM-UWB systems rather than PPM-UWB systems.Furthermore
a TS-TDT (time-shift-TDT) blind timing synchronization algorithm was presented for PPM-UWB
which got synchronizing information from calculating the delay cross-correlation values by means of two correlation branches.Theoretical analysis and simulation results demonstrate that the implementation of the algorithm is of low complexity and flexible in precision control.