Drfm Jammer Study Of Pd Radar Jamming Effect

PD radar is developed on the basis of the radar in the moving target indication (MTI). It has high velocity resolution by using coherent accumulation and matched filtering techniques. Burst is coherent, effective on the Anti-SARS coherent interference, making the traditional interference methods lose their effect. Its effective interference is using DRFM (Digital Radio Frequency Memory) technology to implement interference.DRFM use digital quantization and high-speed data storage technology. In certain conditions, because of copying and saving the work of radar waveform with high-fidelity, the stored signal has a good coherence. It deceives jamming the signal transmitted by coherent radar. It can deceive distance by forwarding delay; also can deceive speed by changing the Doppler frequency. Because of these advantages, DRFM can implement effective interference on PD radar.This article is mainly around DRFM deception jamming technique to study the followings:1. This paper analyze the basic principles of quantitative methods, storage methods and performance indicators of DRFM; describe the interference pattern based on DRFM technology, including distance false target deception, speed gate towing interference and distance-speed gate synchronization towing interference.2. Based on Linear Frequency Modulation (LFM) signal, when PD radar and DRFM jammer are working synchronously, this paper studied the interference of DRFM on PD radar.3. This paper studied the interference effect when PD radar and DRFM jammer are working asynchronously, carried out simulation when the carrier frequency and pulse repetition frequency of signals in PD radar and DRFM are inconsistent.