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Abstract
On the basis of the working principle and circuit response characteristics of the millimeter-wave (MMW) alternating current radiometer, a novel method for waveform jamming is proposed. In this method, a MMW jamming source is used to transmit the narrowband signal as the heat source and then a wide-time signal is obtained through a broadband reception and detection of the radiometer. Next, the wide-time signal excites differential response of low-frequency circuit of the video amplifier to yield the splitting waveform, which is similar to the negative pulse waveform in metal-target detection, therefore achieving detection effect of cold-target from the angle of waveform simulation. Simulation results show that the average similarity of the simulation waveform and the actual waveform is 79.21%, and the processing results of experimental data demonstrate validity and feasibility of the proposed method.
Acknowledgment
This work is partially supported by the Specialized Research Fund for the Doctoral Program of Higher Education (No. 20093219120018), the China Postdoctoral Science Foundation Funded Project (No. 20100481151), and the NUST Research Funding (No. 2011YBXM73). The authors also gratefully acknowledge the helpful comments and suggestions of the reviewers, which have improved the presentation.