Abstract: There is abrupt phase change in nonsinusoidal waves modulation.It can easily produce impulse current and bring large difficulty to high-power emission system;so it is not beneficial to holding the orthogonality between the orthogonal pulses and demodulating information.For this question,nonsinusoidal wave modulation based on IJF coding is put forward.This scheme uses smooth wave instead of discontinuous wave,so the wave in time field is continuous phase and has good frequency spectrum characteristics.