Research On Multi-target Waveform Synthesis Technology Based On DJS

In modern warfare, the electronic warfare plays a very important role.Radar is like a detection equipment in the electronic warfare.The purpose of the the Radar jamming is to hinder the identification of targets.With the rapid development of the digitial circuits and signal processing technology,the technology of radar jamming is transforming from analog tecnnology to digital technology.Firstly, this paper introduces the basic components and principles of the Digital Jamming Synthesis(DJS),and also introduces the two key technologys, including Direct Digital Frequency Synthesis(DDS) and Digital Radio Frequency Memory(DRFM).Firstly,in the technology of Multi-target DJS,the best baseband jamming signals should be obtained. Currently there are two types of jamming signals,one type is the Suppressing Jamming,the best jamming waveform is the RF Noise Jamming which has the same bandwidth as the radar signals;Another type is the Deception Jamming,the best jamming waveform is the Frequency-shifting jamming approaching radar waveform.This paper introduces the generating technology of RF Noise Jamming and Frequency-shifting Jamming,and simulates the waveform of this two type signals.By changing the address increment and clcok frequency of the reading data,we can change the bandwidth of the Noise signals.By the way of Digital Quadrature Upconverter,we can easily change the center frequency of the noise signal.This paper uses two methods to do the DJS waveform synthesis,this paper uses the the damain method to do the simulation of the two paths RF Noise Jamming and Frequency-shifting Jamming waveform synthesis.And this paper also analyzes the waveform of the sythseized signals.It is proved that the Multi-target DJS waveform synthesis have the big significances.This paper also introduces the power management for Multi-target DJS waveform synthesis.Finally, in the case of LFM signals and pulse compression, the traditional and DJS synthesis interference effects are verified by simulations.