Phase-switched Screen Periodic Non-uniform Intermittent Modulation Method

doi:10.12382/bgxb.2021.0789

Abstract

Abstract:

Phase-switched screen (PSS), as a kind of artificial electromagnetic material with dynamically adjustable electromagnetic scattering characteristics, can change radar target characteristics by controlling the reflection state of electromagnetic waves to realize radar target simulation or false target generation. To address the problem of limited control parameters and single modulation effect of the phase-switched screen periodic intermittent modulation method, a phase-switched screen periodic non-uniform intermittent modulation method is proposed. The periodic non-uniform intermittent modulation signal model is constructed on the basis of the periodic intermittent modulation signal, the modulation coefficient is introduced according to the characteristics of the modulation signal, and the dimension of the phase-switched screen control parameter is expanded. Through theoretical derivation, the influence of the PSS periodic non-uniform modulation method on the radar chirp signal is analyzed. The simulation experiment results show that compared with the PSS periodic intermittent modulation method, this method has more flexible modulation styles and more diverse modulation results, thus having higher application value in radar target simulation and radar target characteristic control.

Key words: radar target, phase-switched screen, interval modulation

KONG Yameng, WANG Guoyu, FENG Dejun, WANG Junjie. Phase-switched Screen Periodic Non-uniform Intermittent Modulation Method[J]. Acta Armamentarii, 2023, 44(4): 1209-1216.

Figures/Tables 9

Fig.1 Basic structure of phase-switched screen

Fig.2 Operating principle of phase-switched screen

Fig.3 Periodic non-uniform intermittent modulation model

Fig.4 Periodic intermittent modulation result

Fig.5 Effect of periodic non-uniform intermittent modulation factor d on matched filtering results

Fig.6 Variation curve of discrete peak amplitude

Fig.7 Variation curve of the mean value of the discrete peak amplitude of 1, 2, and 3 orders

Fig.8 Variance curve of discrete peak amplitude of 1, 2, and 3 orders

Fig.9 Effect of periodic non-uniform intermittent modulation frequency fs on matched filtering results

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