Adaptive Dual-Polarization Filtering Method for Countering Active Jamming

Abstract

In order to counter active jamming, an adaptive polarization filtering method based on dual polarization radar is put forward. First, the signal flow principle of the dual polarization radar and its signal model are introduced. Then, the weighted coefficient matrices of the polarization filter are calculated adaptively according to the actual work situation of the current radar. Finally, the specific polarization filtering algorithm and the output criterion of the optimal filtering results are given. Experimental results show that this method does not need to know the type, quantity, combination mode, polarization characteristics, and other prior knowledge of active jamming but has well effect on both active deception jamming and active blanket jamming, so it has strong engineering application value.

Polarization Characteristics of Electromagnetic Wave Sensing in Confined Space Based on Hybrid Algorithm

“…The s-polarized electromagnetic wave begins to decay as an exponential function at the cutoff position. When the real part of the dielectric constant of the plasma approaches 0, p-polarized waves undergo mode transformation, and the variation of reflection, transmission, and absorption coefficients with frequency is calculated and analyzed [6]. Based on the analysis of electromagnetic wave propagation theory and multimode theory, Zang et al studied the influence of shape factor on electromagnetic wave propagation attenuation of rectangular roadway in high-order mode through computer simulation, and the simulation results show that 2…”