The waveform design of random hopping frequency based on "S" curve

To improve the anti-interference capability of high range resolution radar, the random hopping frequency signal is required. A waveform design method of random hopping frequency signal based on "S" curve is presented. Firstly, the random hopping frequency signal with low peak side lobe is obtained by optimization. Then the frequency distribution is analyzed and fitted by "S" curve. The ambiguity function of RHF signal based on different window functions is evaluated. The results show that the random hopping frequency signal has low peak sidelobe level, small mainlobe broadening, strong anti-interference capability and low implementation cost, which indicates its high practical value in real applications.