Abstract: The UWB signal acquisition circuit based on the analog PLL is improved.A method to obtain the signal clock is studied, and then on the base of this circuit a binary search algorithm is proposed to obtain the pulse position and the timing of the signal frame.The circuit of this method can be realized easily.The simulation results and analysis indicate that it has the merits of precise timing and fast acquisition.It is of considerable reference value for the realization of UWB communication.

Key words: acquisition, UWB signal, analog PLL, binary search