Anti-sweep-jamming Method Based on Instantaneous Correlation and Harmonic Time Sequence Test for Pseudo Code and Linear Frequency Hybrid Modulation Detector

Sweep-jamming, combining the jamming effect of “suppress” jamming and “aim” jamming, has been widely used in electronic warfare systems. In order to improve the anti-sweep-jamming performance of the pseudo code and linear frequency hybrid modulation detector (hereinafter referred to as the hybrid modulation detector), this paper analyses the detector's response under sweep jamming the proposes an anti-jamming method based on frequency instantaneous correlation and harmonic timing sequence test approach, which combines time-domain instantaneous correlation with frequency-domain timing sequence test to obtain the range information of the target and utilizes the multiple harmonic time information to improve the “anti-sweep-jamming” performance. For proving the feasibility of the proposed method, this paper designs the simulation and the measurement and verifies that the “frequency instantaneous correlation and harmonic timing sequence test” method can effectively improve the anti-interference performance of the hybrid modulation detector.