An Unambiguity Method for PD Radar using Orthogonal Binary Phase Coded Signal

In order to decrease the blind area of pulse Doppler radar, narrow transmitting pulse is used in this paper, and high pulse repetition frequency working mode is adopted to avoid velocity ambiguity. In this paper, orthogonal binary phase coded signals are used in multiple pulses to mitigate range ambiguity. And data rearrangement of echo signals of multiple transmitted pulses is performed, and then pulse compression and moving target detection are used to obtain the peak value which can reflect the velocity and range information of target without ambiguity. Simulation results show the effectiveness and feasibility of the proposed method.