①(School of Internet of Things Engineering, Jiangnan University, Wuxi 214122, China) ②(Department of Electronic Engineering, Tsinghua University, Beijing 100084, China)
Abstract：Repeater jamming is an important trend of deception jamming against Linear Frequency Modulation (LFM) radar, and repeater jamming waveform is determined by three factors: carrier frequency offset, pulse width and linear frequency modulation rate. When there are simultaneous deviations of these factors, the deception effect of repeater jamming is studied separately in time domain and frequency domain. Three important parameters about Jamming to Noise Ratio (JNR) are derived especially, which are pulse width losses, peak power losses and peak time delay. Theoretical analysis shows that the fast estimation by a group delay in time domain for the formulas of these parameters is in accordance with the detailed deduction by spectrum analysis in frequency domain, and the corresponding MATLAB simulations are provided. So the analysis of the general jamming can be simplified by these formulas.
2013, Vol. 35 
