Study on a Nonlinear Frequency Modulation Signal with Polarization-Coded Modulation

This paper proposes a kind of complex radar signal with polarization agility based on nonlinear frequency modulation (NLFM) signals. This signal has the characteristics of NLFM signals and the anti-jamming ability and performance of low probability of intercept (LPI) can be improved by using the polarization-coded modulation technique. The mathematical expression of the signal is given and the methods of signal processing and target detection are discussed. The performance of the signal is analyzed and simulated when the target signal and the interference are in the different range cells, the results indicate that the target can be detected and the interference can be suppressed by two dimension signal processing when the target can be distinguished from the interference in polarization domain.