Abstract:

A method of jamming for SAR combining chaotic shift frequency and modulation phase is proposed. The characteristics of both traditional fixed shift frequency and radom shift frequency  jamming combining with the modulation phase jamming are analyzed. The range chaos shift frequency combined with azimuth cosine modulation phase jamming can overcome the disadvatage of the two methods, utilizing the two-dimensional （2-D） coherentgain, the 2-D surface cover can be obtained for SAR, which can cover the distributed targets. The simulation results show that this method is more effective than conventional fixed shift frequency jamming and  radom shift frequency  jamming combining with modulation phase jamming.