With the development of radar technology，considering the low probability of interception，the modulation of radar signal becomes more and more complex. In order to simplify the complex design of transmitter，basing on FPGA to control AD9858，this study put forward a realization method of a intrapulse Linear Frequency Modulation(LFM) and interpulse Bi-phase coded intermediate frequency pulsed radar signal. The results of design and test proved that the output waveform met the technical requirement and the waveform parameters were accurate; furthermore, this system could be controlled easily and its performance was good.