Design and realization of the step frequency echo simulator based on DDS

In the development of the step frequency radar, time and costs would be greatly curtailed by applying the echo simulator of step frequency waveform to verify the signal processing system. This paper analyzes the characteristics of step frequency echoes in detail and describes the implementation of the point-target echo simulator based on DDS. The experimental results of the scheme show that the equipment closely simulates the echo of step frequency signal and the feasibility of this method is also soundly proved.