Abstract:

To reduce the intercepted probability of radar signals by passive detection system of the enemy, it is important to research radar signals with good radio frequency (RF) Stealth performance. The nonlinear frequency modulation (NLFM) signal is designed based on the windows reverse seeking method and optimized by combination widows. The ratio of mainlobe peak to sidelobe peak (RMS) and mainlobe width are discussed of different windows. Because of the good RF stealth performance of multiple input multiple output (MIMO) radar, orthogonal frequency division NLFM (OFD-NLFM) signals are designed based on a simple window and combination windows. The correlation RMS, mainlobe width and cross correlation peak level of different combination coefficients are given. Research shows that in the circumstance of orthogonality of every signal, the OFD-NLFM signal has higher RMS and has good RF stealth performance in modern battlefield.