Interference Suppressionin Ground Unmanned Equipment Cluster Communication Based on Circular Array

doi:10.12382/bgxb.2022.0904

Abstract

Abstract:

To increase communication distance, enlarge signal coverage area, and suppress interference in ground unmanned equipment cluster communication, a new method based on circular array is proposed. By calibrating through channel amplitude-phase consistency, determining signal direction with the MUSIC algorithm, and completing digital beamforming with the Capon algorithm, the method can effectively extract useful signals, suppress noise and interference. Simulation results show that the method can form multiple high-gain beams in the 360° azimuth plane, enable cluster distribution, increase communication distance, and nullify interference. This improves the anti-interference capability of ground unmanned equipment cluster networking communication in the space domain, increasing signal coverage effectively. The research provides a useful reference for beamforming and interference suppression in ground unmanned equipment cluster networking.

Key words: unmanned equipment, circular array, beamforming, cluster networking, interference suppression

MU Weiwei, HE Binbing, QI Yao, LI Zixian, ZHANG Zhichao, XU Youchun. Interference Suppressionin Ground Unmanned Equipment Cluster Communication Based on Circular Array[J]. Acta Armamentarii, 2023, 44(5): 1414-1421.

Figures/Tables 13

Fig.1 Schematic diagram of ground unmanned equipment trunking communication

Fig.2 Antenna array model (planform)

Fig.3 Photograph of the antenna array

Fig.4 Block diagram of the trunking communication interference suppression procedure

Fig.5 Block diagram of the calibration process

Fig.6 Waveforms before and after channel calibration (the left image shows the amplitude of input signals, while the right is the waveform in the time-domain)

Fig.7 Block diagram of the spectral peak search module

Fig.8 Spatial spectrum estimation of four child nodes

Fig.9 Adaptive beamforming block diagram

Fig.10 Directional diagram of 2×4 circular array factors

Fig.11 Direction diagram of interference signals and child node signals

Fig.12 Azimuth 0°-pointing gain pattern

Fig.13 Gain pattern with different azimuth pointings

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