DOI: 10.3724/SP.J.1146.2012.01695

Journal of Electronics & Information Technology (电子与信息学报) 2013/35:12 PP.2874-2881

Repeater Jamming Against LFM Pulse Radar

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.

Key words:Radar signal processing,Linear Frequency Modulation (LFM),Repeater jamming,Jamming to Noise Ratio

ReleaseDate:2014-07-21 17:04:32